diff --git a/package-lock.json b/package-lock.json index 84b35be..0b1a2ad 100644 --- a/package-lock.json +++ b/package-lock.json @@ -8,16 +8,17 @@ "name": "mdview", "version": "0.3.4", "license": "MIT", + "workspaces": [ + "packages/*" + ], "dependencies": { "@jamesainslie/docx": "^9.5.1-svg.1", "dompurify": "^3.0.6", - "highlight.js": "^11.9.0", "markdown-it-anchor": "^8.6.7", "markdown-it-attrs": "^4.1.6", "markdown-it-emoji": "^3.0.0", "markdown-it-footnote": "^4.0.0", - "markdown-it-task-lists": "^2.1.1", - "panzoom": "^9.4.3" + "markdown-it-task-lists": "^2.1.1" }, "devDependencies": { "@crxjs/vite-plugin": "^2.0.0", @@ -34,7 +35,6 @@ "jsdom": "^27.2.0", "lint-staged": "^16.2.7", "markdown-it": "^14.1.0", - "mermaid": "^11.12.1", "playwright": "^1.48.0", "prettier": "^3.1.0", "sharp": "^0.34.5", @@ -68,7 +68,6 @@ "version": "1.1.0", "resolved": "https://registry.npmjs.org/@antfu/install-pkg/-/install-pkg-1.1.0.tgz", "integrity": "sha512-MGQsmw10ZyI+EJo45CdSER4zEb+p31LpDAFp2Z3gkSd1yqVZGi0Ebx++YTEMonJy4oChEMLsxZ64j8FH6sSqtQ==", - 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"dev": true, "license": "ISC", "dependencies": { "d3-dispatch": "1 - 3", @@ -4230,7 +4193,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-chord/-/d3-chord-3.0.1.tgz", "integrity": "sha512-VE5S6TNa+j8msksl7HwjxMHDM2yNK3XCkusIlpX5kwauBfXuyLAtNg9jCp/iHH61tgI4sb6R/EIMWCqEIdjT/g==", - "dev": true, "license": "ISC", "dependencies": { "d3-path": "1 - 3" @@ -4243,7 +4205,6 @@ "version": "3.1.0", "resolved": "https://registry.npmjs.org/d3-color/-/d3-color-3.1.0.tgz", "integrity": "sha512-zg/chbXyeBtMQ1LbD/WSoW2DpC3I0mpmPdW+ynRTj/x2DAWYrIY7qeZIHidozwV24m4iavr15lNwIwLxRmOxhA==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4253,7 +4214,6 @@ "version": "4.0.2", "resolved": "https://registry.npmjs.org/d3-contour/-/d3-contour-4.0.2.tgz", "integrity": "sha512-4EzFTRIikzs47RGmdxbeUvLWtGedDUNkTcmzoeyg4sP/dvCexO47AaQL7VKy/gul85TOxw+IBgA8US2xwbToNA==", - "dev": true, "license": "ISC", "dependencies": { "d3-array": "^3.2.0" @@ -4266,7 +4226,6 @@ "version": "6.0.4", "resolved": "https://registry.npmjs.org/d3-delaunay/-/d3-delaunay-6.0.4.tgz", "integrity": "sha512-mdjtIZ1XLAM8bm/hx3WwjfHt6Sggek7qH043O8KEjDXN40xi3vx/6pYSVTwLjEgiXQTbvaouWKynLBiUZ6SK6A==", - "dev": true, "license": "ISC", "dependencies": { "delaunator": "5" @@ -4279,7 +4238,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-dispatch/-/d3-dispatch-3.0.1.tgz", "integrity": "sha512-rzUyPU/S7rwUflMyLc1ETDeBj0NRuHKKAcvukozwhshr6g6c5d8zh4c2gQjY2bZ0dXeGLWc1PF174P2tVvKhfg==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4289,7 +4247,6 @@ "version": "3.0.0", "resolved": "https://registry.npmjs.org/d3-drag/-/d3-drag-3.0.0.tgz", "integrity": "sha512-pWbUJLdETVA8lQNJecMxoXfH6x+mO2UQo8rSmZ+QqxcbyA3hfeprFgIT//HW2nlHChWeIIMwS2Fq+gEARkhTkg==", - "dev": true, "license": "ISC", "dependencies": { "d3-dispatch": "1 - 3", @@ -4303,7 +4260,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-dsv/-/d3-dsv-3.0.1.tgz", "integrity": "sha512-UG6OvdI5afDIFP9w4G0mNq50dSOsXHJaRE8arAS5o9ApWnIElp8GZw1Dun8vP8OyHOZ/QJUKUJwxiiCCnUwm+Q==", - "dev": true, "license": "ISC", "dependencies": { "commander": "7", @@ -4329,7 +4285,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-ease/-/d3-ease-3.0.1.tgz", "integrity": "sha512-wR/XK3D3XcLIZwpbvQwQ5fK+8Ykds1ip7A2Txe0yxncXSdq1L9skcG7blcedkOX+ZcgxGAmLX1FrRGbADwzi0w==", - "dev": true, "license": "BSD-3-Clause", "engines": { "node": ">=12" @@ -4339,7 +4294,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-fetch/-/d3-fetch-3.0.1.tgz", "integrity": "sha512-kpkQIM20n3oLVBKGg6oHrUchHM3xODkTzjMoj7aWQFq5QEM+R6E4WkzT5+tojDY7yjez8KgCBRoj4aEr99Fdqw==", - "dev": true, "license": "ISC", "dependencies": { "d3-dsv": "1 - 3" @@ -4352,7 +4306,6 @@ "version": "3.0.0", "resolved": "https://registry.npmjs.org/d3-force/-/d3-force-3.0.0.tgz", "integrity": "sha512-zxV/SsA+U4yte8051P4ECydjD/S+qeYtnaIyAs9tgHCqfguma/aAQDjo85A9Z6EKhBirHRJHXIgJUlffT4wdLg==", - "dev": true, "license": "ISC", "dependencies": { "d3-dispatch": "1 - 3", @@ -4367,7 +4320,6 @@ "version": "3.1.0", "resolved": "https://registry.npmjs.org/d3-format/-/d3-format-3.1.0.tgz", "integrity": "sha512-YyUI6AEuY/Wpt8KWLgZHsIU86atmikuoOmCfommt0LYHiQSPjvX2AcFc38PX0CBpr2RCyZhjex+NS/LPOv6YqA==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4377,7 +4329,6 @@ "version": "3.1.1", "resolved": "https://registry.npmjs.org/d3-geo/-/d3-geo-3.1.1.tgz", "integrity": "sha512-637ln3gXKXOwhalDzinUgY83KzNWZRKbYubaG+fGVuc/dxO64RRljtCTnf5ecMyE1RIdtqpkVcq0IbtU2S8j2Q==", - "dev": true, "license": "ISC", "dependencies": { "d3-array": "2.5.0 - 3" @@ -4390,7 +4341,6 @@ "version": "3.1.2", "resolved": "https://registry.npmjs.org/d3-hierarchy/-/d3-hierarchy-3.1.2.tgz", "integrity": "sha512-FX/9frcub54beBdugHjDCdikxThEqjnR93Qt7PvQTOHxyiNCAlvMrHhclk3cD5VeAaq9fxmfRp+CnWw9rEMBuA==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4400,7 +4350,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-interpolate/-/d3-interpolate-3.0.1.tgz", "integrity": "sha512-3bYs1rOD33uo8aqJfKP3JWPAibgw8Zm2+L9vBKEHJ2Rg+viTR7o5Mmv5mZcieN+FRYaAOWX5SJATX6k1PWz72g==", - "dev": true, "license": "ISC", "dependencies": { "d3-color": "1 - 3" @@ -4413,7 +4362,6 @@ "version": "3.1.0", "resolved": "https://registry.npmjs.org/d3-path/-/d3-path-3.1.0.tgz", "integrity": "sha512-p3KP5HCf/bvjBSSKuXid6Zqijx7wIfNW+J/maPs+iwR35at5JCbLUT0LzF1cnjbCHWhqzQTIN2Jpe8pRebIEFQ==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4423,7 +4371,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-polygon/-/d3-polygon-3.0.1.tgz", "integrity": "sha512-3vbA7vXYwfe1SYhED++fPUQlWSYTTGmFmQiany/gdbiWgU/iEyQzyymwL9SkJjFFuCS4902BSzewVGsHHmHtXg==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4433,7 +4380,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-quadtree/-/d3-quadtree-3.0.1.tgz", "integrity": "sha512-04xDrxQTDTCFwP5H6hRhsRcb9xxv2RzkcsygFzmkSIOJy3PeRJP7sNk3VRIbKXcog561P9oU0/rVH6vDROAgUw==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4443,7 +4389,6 @@ "version": "3.0.1", "resolved": "https://registry.npmjs.org/d3-random/-/d3-random-3.0.1.tgz", "integrity": "sha512-FXMe9GfxTxqd5D6jFsQ+DJ8BJS4E/fT5mqqdjovykEB2oFbTMDVdg1MGFxfQW+FBOGoB++k8swBrgwSHT1cUXQ==", - "dev": true, "license": "ISC", "engines": { "node": ">=12" @@ -4453,7 +4398,6 @@ "version": "0.12.3", "resolved": "https://registry.npmjs.org/d3-sankey/-/d3-sankey-0.12.3.tgz", "integrity": "sha512-nQhsBRmM19Ax5xEIPLMY9ZmJ/cDvd1BG3UVvt5h3WRxKg5zGRbvnteTyWAbzeSvlh3tW7ZEmq4VwR5mB3tutmQ==", - "dev": true, "license": "BSD-3-Clause", "dependencies": { "d3-array": "1 - 2", @@ -4464,7 +4408,6 @@ "version": "2.12.1", "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-2.12.1.tgz", "integrity": "sha512-B0ErZK/66mHtEsR1TkPEEkwdy+WDesimkM5gpZr5Dsg54BiTA5RXtYW5qTLIAcekaS9xfZrzBLF/OAkB3Qn1YQ==", - 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"license": "MIT" + "license": "MIT", + "peer": true }, "node_modules/tinybench": { "version": "2.9.0", @@ -8810,7 +8750,6 @@ "version": "1.0.2", "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.0.2.tgz", "integrity": "sha512-W/KYk+NFhkmsYpuHq5JykngiOCnxeVL8v8dFnqxSD8qEEdRfXk1SDM6JzNqcERbcGYj9tMrDQBYV9cjgnunFIg==", - "dev": true, "license": "MIT", "engines": { "node": ">=18" @@ -8857,7 +8796,6 @@ "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==", "dev": true, "license": "MIT", - "peer": true, "engines": { "node": ">=12" }, @@ -8951,7 +8889,6 @@ "version": "2.2.0", "resolved": "https://registry.npmjs.org/ts-dedent/-/ts-dedent-2.2.0.tgz", "integrity": "sha512-q5W7tVM71e2xjHZTlgfTDoPF/SmqKG5hddq9SzR49CH2hayqRKJtQ4mtRlSxKaJlR/+9rEM+mnBHf7I2/BQcpQ==", - "dev": true, "license": "MIT", "engines": { "node": ">=6.10" @@ -8977,7 +8914,6 @@ "integrity": "sha512-5C1sg4USs1lfG0GFb2RLXsdpXqBSEhAaA/0kPL01wxzpMqLILNxIxIOKiILz+cdg/pLnOUxFYOR5yhHU666wbw==", "dev": true, "license": "MIT", - "peer": true, "dependencies": { "esbuild": "~0.27.0", "get-tsconfig": "^4.7.5" @@ -9471,7 +9407,8 @@ "resolved": "https://registry.npmjs.org/typed-query-selector/-/typed-query-selector-2.12.0.tgz", "integrity": "sha512-SbklCd1F0EiZOyPiW192rrHZzZ5sBijB6xM+cpmrwDqObvdtunOHHIk9fCGsoK5JVIYXoyEp4iEdE3upFH3PAg==", "dev": true, - "license": "MIT" + "license": "MIT", + "peer": true }, "node_modules/typescript": { "version": "5.9.3", @@ -9479,7 +9416,6 @@ "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==", "dev": true, "license": "Apache-2.0", - "peer": true, "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" @@ -9498,7 +9434,6 @@ "version": "1.6.1", "resolved": "https://registry.npmjs.org/ufo/-/ufo-1.6.1.tgz", "integrity": "sha512-9a4/uxlTWJ4+a5i0ooc1rU7C7YOw3wT+UGqdeNNHWnOF9qcMBgLRS+4IYUqbczewFx4mLEig6gawh7X6mFlEkA==", - "dev": true, "license": "MIT" }, "node_modules/unbzip2-stream": { @@ -9507,6 +9442,7 @@ "integrity": "sha512-mlExGW4w71ebDJviH16lQLtZS32VKqsSfk80GCfUlwT/4/hNRFsoscrF/c++9xinkMzECL1uL9DDwXqFWkruPg==", "dev": true, "license": "MIT", + "peer": true, "dependencies": { "buffer": "^5.2.1", "through": "^2.3.8" @@ -9569,7 +9505,6 @@ "version": "11.1.0", "resolved": "https://registry.npmjs.org/uuid/-/uuid-11.1.0.tgz", "integrity": "sha512-0/A9rDy9P7cJ+8w1c9WD9V//9Wj15Ce2MPz8Ri6032usz+NfePxx5AcN3bN+r6ZL6jEo066/yNYB3tn4pQEx+A==", - "dev": true, "funding": [ "https://github.com/sponsors/broofa", "https://github.com/sponsors/ctavan" @@ -9585,7 +9520,6 @@ "integrity": "sha512-tI2l/nFHC5rLh7+5+o7QjKjSR04ivXDF4jcgV0f/bTQ+OJiITy5S6gaynVsEM+7RqzufMnVbIon6Sr5x1SDYaQ==", "dev": true, "license": "MIT", - "peer": true, "dependencies": { "esbuild": "^0.25.0", "fdir": "^6.5.0", @@ -9694,7 +9628,6 @@ "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==", "dev": true, "license": "MIT", - "peer": true, "engines": { "node": ">=12" }, @@ -9846,7 +9779,6 @@ "version": "8.2.0", "resolved": "https://registry.npmjs.org/vscode-jsonrpc/-/vscode-jsonrpc-8.2.0.tgz", "integrity": "sha512-C+r0eKJUIfiDIfwJhria30+TYWPtuHJXHtI7J0YlOmKAo7ogxP20T0zxB7HZQIFhIyvoBPwWskjxrvAtfjyZfA==", - "dev": true, "license": "MIT", "engines": { "node": ">=14.0.0" @@ -9856,7 +9788,6 @@ "version": "9.0.1", "resolved": "https://registry.npmjs.org/vscode-languageserver/-/vscode-languageserver-9.0.1.tgz", "integrity": "sha512-woByF3PDpkHFUreUa7Hos7+pUWdeWMXRd26+ZX2A8cFx6v/JPTtd4/uN0/jB6XQHYaOlHbio03NTHCqrgG5n7g==", - "dev": true, "license": "MIT", "dependencies": { "vscode-languageserver-protocol": "3.17.5" @@ -9869,7 +9800,6 @@ "version": "3.17.5", "resolved": "https://registry.npmjs.org/vscode-languageserver-protocol/-/vscode-languageserver-protocol-3.17.5.tgz", "integrity": "sha512-mb1bvRJN8SVznADSGWM9u/b07H7Ecg0I3OgXDuLdn307rl/J3A9YD6/eYOssqhecL27hK1IPZAsaqh00i/Jljg==", - "dev": true, "license": "MIT", "dependencies": { "vscode-jsonrpc": "8.2.0", @@ -9880,21 +9810,18 @@ "version": "1.0.12", "resolved": "https://registry.npmjs.org/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.12.tgz", "integrity": "sha512-cxWNPesCnQCcMPeenjKKsOCKQZ/L6Tv19DTRIGuLWe32lyzWhihGVJ/rcckZXJxfdKCFvRLS3fpBIsV/ZGX4zA==", - "dev": true, "license": "MIT" }, "node_modules/vscode-languageserver-types": { "version": "3.17.5", "resolved": "https://registry.npmjs.org/vscode-languageserver-types/-/vscode-languageserver-types-3.17.5.tgz", "integrity": "sha512-Ld1VelNuX9pdF39h2Hgaeb5hEZM2Z3jUrrMgWQAu82jMtZp7p3vJT3BzToKtZI7NgQssZje5o0zryOrhQvzQAg==", - "dev": true, "license": "MIT" }, "node_modules/vscode-uri": { "version": "3.0.8", "resolved": "https://registry.npmjs.org/vscode-uri/-/vscode-uri-3.0.8.tgz", "integrity": "sha512-AyFQ0EVmsOZOlAnxoFOGOq1SQDWAB7C6aqMGS23svWAllfOaxbuFvcT8D1i8z3Gyn8fraVeZNNmN6e9bxxXkKw==", - "dev": true, "license": "MIT" }, "node_modules/w3c-xmlserializer": { @@ -10012,6 +9939,7 @@ "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==", "dev": true, "license": "MIT", + "peer": true, "dependencies": { "ansi-styles": "^4.0.0", "string-width": "^4.1.0", @@ -10094,6 +10022,7 @@ "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==", "dev": true, "license": "ISC", + "peer": true, "engines": { "node": ">=10" } @@ -10104,7 +10033,6 @@ "integrity": "sha512-lcYcMxX2PO9XMGvAJkJ3OsNMw+/7FKes7/hgerGUYWIoWu5j/+YQqcZr5JnPZWzOsEBgMbSbiSTn/dv/69Mkpw==", "dev": true, "license": "ISC", - "peer": true, "bin": { "yaml": "bin.mjs" }, @@ -10118,6 +10046,7 @@ "integrity": "sha512-7dSzzRQ++CKnNI/krKnYRV7JKKPUXMEh61soaHKg9mrWEhzFWhFnxPxGl+69cD1Ou63C13NUPCnmIcrvqCuM6w==", "dev": true, "license": "MIT", + "peer": true, "dependencies": { "cliui": "^8.0.1", "escalade": "^3.1.1", @@ -10137,6 +10066,7 @@ "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==", "dev": true, "license": "ISC", + "peer": true, "engines": { "node": ">=12" } @@ -10147,6 +10077,7 @@ "integrity": "sha512-p4a9I6X6nu6IhoGmBqAcbJy1mlC4j27vEPZX9F4L4/vZT3Lyq1VkFHw/V/PUcB9Buo+DG3iHkT0x3Qya58zc3g==", "dev": true, "license": "MIT", + "peer": true, "dependencies": { "buffer-crc32": "~0.2.3", "fd-slicer": "~1.1.0" @@ -10171,9 +10102,54 @@ "integrity": "sha512-XBx9AXhXktjUqnepgTiE5flcKIYWi/rme0Eaj+5Y0lftuGBq+jyRu/md4WnuxqgP1ubdpNCsYEYPxrzVHD8d6g==", "dev": true, "license": "MIT", + "peer": true, "funding": { "url": "https://github.com/sponsors/colinhacks" } + }, + "packages/chrome-ext": { + "name": "@mdview/chrome-ext", + "version": "0.3.4", + "dependencies": { + "@mdview/core": "*" + }, + "devDependencies": { + "@crxjs/vite-plugin": "^2.0.0-beta.28", + "@types/chrome": "^0.0.287" + } + }, + "packages/chrome-ext/node_modules/@types/chrome": { + "version": "0.0.287", + "resolved": "https://registry.npmjs.org/@types/chrome/-/chrome-0.0.287.tgz", + "integrity": "sha512-wWhBNPNXZHwycHKNYnexUcpSbrihVZu++0rdp6GEk5ZgAglenLx+RwdEouh6FrHS0XQiOxSd62yaujM1OoQlZQ==", + "dev": true, + "license": "MIT", + "dependencies": { + "@types/filesystem": "*", + "@types/har-format": "*" + } + }, + "packages/core": { + "name": "@mdview/core", + "version": "0.0.1", + "license": "MIT", + "dependencies": { + "@jamesainslie/docx": "^9.5.1-svg.1", + "dompurify": "^3.0.6", + "highlight.js": "^11.9.0", + "markdown-it": "^14.1.0", + "markdown-it-anchor": "^8.6.7", + "markdown-it-attrs": "^4.1.6", + "markdown-it-emoji": "^3.0.0", + "markdown-it-footnote": "^4.0.0", + "markdown-it-task-lists": "^2.1.1", + "mermaid": "^11.12.1", + "panzoom": "^9.4.3" + }, + "devDependencies": { + "@types/dompurify": "^3.0.5", + "@types/markdown-it": "^13.0.9" + } } } } diff --git a/package.json b/package.json index 8371654..fb87289 100644 --- a/package.json +++ b/package.json @@ -3,28 +3,30 @@ "version": "0.3.4", "description": "Beautiful Chrome extension for viewing Markdown files with themes, syntax highlighting, and interactive Mermaid diagrams", "type": "module", + "workspaces": [ + "packages/*" + ], "scripts": { - "dev": "vite build --watch", - "build": "node scripts/update-manifest-version.js && tsc && vite build && node scripts/fix-manifest.js", + "dev": "npm -w @mdview/chrome-ext run dev", + "build": "npm -w @mdview/chrome-ext run build", + "build:ext": "npm -w @mdview/chrome-ext run build", "export:docx": "tsx scripts/export-docx-mermaid-cli.ts", "preview": "vite preview", "test": "vitest", "test:ci": "vitest --run", "test:e2e": "playwright test", - "lint": "eslint src --ext ts,tsx", - "format": "prettier --write \"src/**/*.{ts,tsx,css}\"", + "lint": "eslint packages --ext ts,tsx", + "format": "prettier --write \"packages/*/src/**/*.{ts,tsx,css}\"", "prepare": "husky" }, "dependencies": { "@jamesainslie/docx": "^9.5.1-svg.1", "dompurify": "^3.0.6", - "highlight.js": "^11.9.0", "markdown-it-anchor": "^8.6.7", "markdown-it-attrs": "^4.1.6", "markdown-it-emoji": "^3.0.0", "markdown-it-footnote": "^4.0.0", - "markdown-it-task-lists": "^2.1.1", - "panzoom": "^9.4.3" + "markdown-it-task-lists": "^2.1.1" }, "devDependencies": { "@crxjs/vite-plugin": "^2.0.0", @@ -41,7 +43,6 @@ "jsdom": "^27.2.0", "lint-staged": "^16.2.7", "markdown-it": "^14.1.0", - "mermaid": "^11.12.1", "playwright": "^1.48.0", "prettier": "^3.1.0", "sharp": "^0.34.5", @@ -65,9 +66,12 @@ "author": "James Ainslie", "license": "MIT", "lint-staged": { - "{src,tests}/**/*.{ts,tsx}": [ + "packages/*/src/**/*.{ts,tsx}": [ "eslint --fix", "prettier --write" + ], + "tests/**/*.{ts,tsx}": [ + "prettier --write" ] } } diff --git a/packages/chrome-ext/package.json b/packages/chrome-ext/package.json new file mode 100644 index 0000000..3de5e54 --- /dev/null +++ b/packages/chrome-ext/package.json @@ -0,0 +1,17 @@ +{ + "name": "@mdview/chrome-ext", + "version": "0.3.4", + "private": true, + "type": "module", + "scripts": { + "dev": "vite", + "build": "vite build" + }, + "dependencies": { + "@mdview/core": "*" + }, + "devDependencies": { + "@crxjs/vite-plugin": "^2.0.0-beta.28", + "@types/chrome": "^0.0.287" + } +} diff --git a/public/icons/icon128.png b/packages/chrome-ext/public/icons/icon128.png similarity index 100% rename from public/icons/icon128.png rename to packages/chrome-ext/public/icons/icon128.png diff --git a/public/icons/icon128.svg b/packages/chrome-ext/public/icons/icon128.svg similarity index 100% rename from public/icons/icon128.svg rename to packages/chrome-ext/public/icons/icon128.svg diff --git a/public/icons/icon16.png b/packages/chrome-ext/public/icons/icon16.png similarity index 100% rename from public/icons/icon16.png rename to packages/chrome-ext/public/icons/icon16.png diff --git a/public/icons/icon16.svg b/packages/chrome-ext/public/icons/icon16.svg similarity index 100% rename from public/icons/icon16.svg rename to packages/chrome-ext/public/icons/icon16.svg diff --git a/public/icons/icon32.png b/packages/chrome-ext/public/icons/icon32.png similarity index 100% rename from public/icons/icon32.png rename to packages/chrome-ext/public/icons/icon32.png diff --git a/public/icons/icon32.svg b/packages/chrome-ext/public/icons/icon32.svg similarity index 100% rename from public/icons/icon32.svg rename to packages/chrome-ext/public/icons/icon32.svg diff --git a/public/icons/icon48.png b/packages/chrome-ext/public/icons/icon48.png similarity index 100% rename from public/icons/icon48.png rename to packages/chrome-ext/public/icons/icon48.png diff --git a/public/icons/icon48.svg b/packages/chrome-ext/public/icons/icon48.svg similarity index 100% rename from public/icons/icon48.svg rename to packages/chrome-ext/public/icons/icon48.svg diff --git a/public/manifest.json b/packages/chrome-ext/public/manifest.json similarity index 100% rename from public/manifest.json rename to packages/chrome-ext/public/manifest.json diff --git a/scripts/fix-manifest.js b/packages/chrome-ext/scripts/fix-manifest.js similarity index 100% rename from scripts/fix-manifest.js rename to packages/chrome-ext/scripts/fix-manifest.js diff --git a/scripts/generate-icons.cjs b/packages/chrome-ext/scripts/generate-icons.cjs similarity index 100% rename from scripts/generate-icons.cjs rename to packages/chrome-ext/scripts/generate-icons.cjs diff --git a/scripts/generate-icons.js b/packages/chrome-ext/scripts/generate-icons.js similarity index 100% rename from scripts/generate-icons.js rename to packages/chrome-ext/scripts/generate-icons.js diff --git a/scripts/svg-to-png.cjs b/packages/chrome-ext/scripts/svg-to-png.cjs similarity index 100% rename from scripts/svg-to-png.cjs rename to packages/chrome-ext/scripts/svg-to-png.cjs diff --git a/scripts/update-manifest-version.js b/packages/chrome-ext/scripts/update-manifest-version.js similarity index 100% rename from scripts/update-manifest-version.js rename to packages/chrome-ext/scripts/update-manifest-version.js diff --git a/src/background/service-worker.ts b/packages/chrome-ext/src/background/service-worker.ts similarity index 96% rename from src/background/service-worker.ts rename to packages/chrome-ext/src/background/service-worker.ts index 53e85a8..fa96e89 100644 --- a/src/background/service-worker.ts +++ b/packages/chrome-ext/src/background/service-worker.ts @@ -3,8 +3,8 @@ * Handles state management, message passing, coordination, and cache management */ -import type { AppState, ThemeName } from '../types'; -import { CacheManager } from '../core/cache-manager'; +import type { AppState, ThemeName, CachedResult } from '@mdview/core'; +import { CacheManager } from '@mdview/core'; import { debug } from '../utils/debug-logger'; // Default state @@ -151,12 +151,14 @@ function setupContextMenu(): void { // Handle context menu clicks chrome.contextMenus.onClicked.addListener((info, tab) => { if (info.menuItemId === 'mdview-add-comment' && tab?.id) { - void chrome.tabs.sendMessage(tab.id, { - type: 'ADD_COMMENT', - payload: { selectionText: info.selectionText }, - }).catch(() => { - // Tab may not have content script - }); + void chrome.tabs + .sendMessage(tab.id, { + type: 'ADD_COMMENT', + payload: { selectionText: info.selectionText }, + }) + .catch(() => { + // Tab may not have content script + }); } }); @@ -299,7 +301,7 @@ chrome.runtime.onMessage.addListener( case 'CACHE_SET': { const payload = message.payload as { key: string; - result: import('../types').CachedResult; + result: CachedResult; filePath: string; contentHash: string; theme: ThemeName; @@ -367,7 +369,7 @@ chrome.runtime.onMessage.addListener( case 'GET_USERNAME': { try { - const result = await chrome.runtime.sendNativeMessage( + const result: unknown = await chrome.runtime.sendNativeMessage( 'com.mdview.filewriter', { action: 'get_username' } ); @@ -382,7 +384,7 @@ chrome.runtime.onMessage.addListener( case 'WRITE_FILE': { const payload = message.payload as { path: string; content: string }; try { - const result = await chrome.runtime.sendNativeMessage( + const result: unknown = await chrome.runtime.sendNativeMessage( 'com.mdview.filewriter', { action: 'write', diff --git a/packages/chrome-ext/src/comments/comment-manager.ts b/packages/chrome-ext/src/comments/comment-manager.ts new file mode 100644 index 0000000..39e6ca6 --- /dev/null +++ b/packages/chrome-ext/src/comments/comment-manager.ts @@ -0,0 +1,92 @@ +/** + * Comment Manager — Chrome extension shim + * + * Re-exports the core CommentManager from @mdview/core, pre-configured + * with Chrome extension adapters that delegate to chrome.runtime.sendMessage + * for file writes (WRITE_FILE) and username lookup (GET_USERNAME). + * + * This shim will be removed once the extension is fully migrated to core. + */ + +import { + CommentManager as CoreCommentManager, + type CommentManagerAdapters, + type FileAdapter, + type IdentityAdapter, + type FileWriteResult, + type FileChangeInfo, +} from '@mdview/core'; + +/** + * Type-safe helper to send a Chrome runtime message and parse the response. + */ +async function sendChromeMessage(message: Record): Promise { + const result: unknown = await chrome.runtime.sendMessage(message); + return result as T | undefined; +} + +/** + * Chrome extension FileAdapter — delegates to the service worker + * via chrome.runtime.sendMessage({ type: 'WRITE_FILE', ... }). + */ +class ChromeFileAdapter implements FileAdapter { + async writeFile(path: string, content: string): Promise { + const response = await sendChromeMessage<{ success?: boolean; error?: string }>({ + type: 'WRITE_FILE', + payload: { path, content }, + }); + + if (response?.error) { + return { success: false, error: response.error }; + } + return { success: true }; + } + + readFile(_path: string): Promise { + return Promise.reject(new Error('readFile not supported via Chrome messaging')); + } + + checkChanged(_url: string, _lastHash: string): Promise { + return Promise.resolve({ changed: false }); + } + + watch(_path: string, _callback: () => void): () => void { + return () => {}; + } +} + +/** + * Chrome extension IdentityAdapter — delegates to the native host + * via chrome.runtime.sendMessage({ type: 'GET_USERNAME' }). + */ +class ChromeIdentityAdapter implements IdentityAdapter { + async getUsername(): Promise { + try { + const resp = await sendChromeMessage<{ username?: string }>({ + type: 'GET_USERNAME', + }); + return resp?.username ?? ''; + } catch { + // Native host may not be installed + return ''; + } + } +} + +/** + * CommentManager pre-configured with Chrome extension adapters. + * Drop-in replacement for the previous monolithic CommentManager. + */ +// eslint-disable-next-line @typescript-eslint/no-unsafe-declaration-merging +export class CommentManager extends CoreCommentManager { + constructor(adapters?: CommentManagerAdapters) { + // If no adapters provided, use Chrome-backed defaults + // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment + const resolved: CommentManagerAdapters = adapters ?? { + file: new ChromeFileAdapter(), + identity: new ChromeIdentityAdapter(), + }; + // eslint-disable-next-line @typescript-eslint/no-unsafe-call + super(resolved); + } +} diff --git a/src/content/content-script.ts b/packages/chrome-ext/src/content/content-script.ts similarity index 98% rename from src/content/content-script.ts rename to packages/chrome-ext/src/content/content-script.ts index 2d0c722..3e4d5f5 100644 --- a/src/content/content-script.ts +++ b/packages/chrome-ext/src/content/content-script.ts @@ -6,9 +6,9 @@ // CSS is imported but only activated when we add .mdview-active to body import './content.css'; import { FileScanner } from '../utils/file-scanner'; -import type { AppState } from '../types'; +import type { AppState } from '@mdview/core'; import { debug } from '../utils/debug-logger'; -import { TocRenderer } from '../ui/toc-renderer'; +import { TocRenderer } from '@mdview/core'; import type { ExportUI } from '../ui/export-ui'; import type { CommentManager } from '../comments/comment-manager'; @@ -266,7 +266,10 @@ class MDViewContentScript { } // Setup Comments (only for local files, default enabled) - if (this.state?.preferences.commentsEnabled !== false && window.location.protocol === 'file:') { + if ( + this.state?.preferences.commentsEnabled !== false && + window.location.protocol === 'file:' + ) { await this.setupComments(content, filePath); } @@ -608,7 +611,7 @@ class MDViewContentScript { debug.info('MDView', `[ContentScript] Received request to apply theme: ${themeName}`); const { themeEngine } = await import('../core/theme-engine'); debug.debug('MDView', `[ContentScript] Theme engine imported, calling applyTheme`); - await themeEngine.applyTheme(themeName as import('../types').ThemeName); + await themeEngine.applyTheme(themeName as import('@mdview/core').ThemeName); debug.info('MDView', '[ContentScript] Theme applied successfully via engine'); } catch (error) { debug.error('MDView', '[ContentScript] Failed to apply theme:', error); @@ -903,7 +906,12 @@ class MDViewContentScript { debug.info('MDView', 'Setting up Comments...'); const { CommentManager } = await import('../comments/comment-manager'); this.commentManager = new CommentManager(); - await this.commentManager.initialize(markdown, filePath, this.state!.preferences); + const preferences = this.state?.preferences; + if (!preferences) { + debug.warn('MDView', 'Cannot initialize comments: state not loaded'); + return; + } + await this.commentManager.initialize(markdown, filePath, preferences); debug.info('MDView', 'Comments initialized'); } catch (error) { debug.error('MDView', 'Failed to setup comments:', error); diff --git a/src/content/content.css b/packages/chrome-ext/src/content/content.css similarity index 100% rename from src/content/content.css rename to packages/chrome-ext/src/content/content.css diff --git a/packages/chrome-ext/src/core/render-pipeline.ts b/packages/chrome-ext/src/core/render-pipeline.ts new file mode 100644 index 0000000..b477e03 --- /dev/null +++ b/packages/chrome-ext/src/core/render-pipeline.ts @@ -0,0 +1,53 @@ +/** + * Render Pipeline (Chrome Extension Shim) + * + * Re-exports the platform-agnostic RenderPipeline from @mdview/core, + * pre-configured with a Chrome MessagingAdapter that delegates + * to chrome.runtime.sendMessage. + */ + +import { + RenderPipeline as CoreRenderPipeline, + type RenderOptions, + type RenderProgress, + type ProgressCallback, + type RenderPipelineOptions, + type MessagingAdapter, + type IPCMessage, +} from '@mdview/core'; + +// --------------------------------------------------------------------------- +// Chrome MessagingAdapter — bridges core pipeline to chrome.runtime +// --------------------------------------------------------------------------- + +class ChromeMessagingAdapter implements MessagingAdapter { + async send(message: IPCMessage): Promise { + return chrome.runtime.sendMessage(message); + } +} + +// --------------------------------------------------------------------------- +// Re-export the pipeline class (consumers can still `new RenderPipeline()`) +// --------------------------------------------------------------------------- + +/** + * Chrome-flavored RenderPipeline. + * + * Extends the core pipeline by injecting a ChromeMessagingAdapter so that + * cache operations (CACHE_GENERATE_KEY, CACHE_GET, CACHE_SET) are routed + * through the Chrome extension service worker. + */ +export class RenderPipeline extends CoreRenderPipeline { + constructor(options?: RenderPipelineOptions) { + super({ + messaging: new ChromeMessagingAdapter(), + ...options, + }); + } +} + +// Re-export types so existing consumers keep working +export type { RenderOptions, RenderProgress, ProgressCallback }; + +// Export singleton +export const renderPipeline = new RenderPipeline(); diff --git a/packages/chrome-ext/src/core/theme-engine.ts b/packages/chrome-ext/src/core/theme-engine.ts new file mode 100644 index 0000000..c511353 --- /dev/null +++ b/packages/chrome-ext/src/core/theme-engine.ts @@ -0,0 +1,204 @@ +/** + * Theme Engine — Chrome extension shim + * + * Wraps the platform-agnostic ThemeEngine from @mdview/core, + * wired up with a Chrome StorageAdapter and DOM-specific methods + * (applyTheme, watchSystemTheme, updateSyntaxTheme). + */ + +/* eslint-disable @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access, @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-unsafe-argument */ + +import type { Theme, ThemeName, StorageAdapter, ThemeOverrides } from '@mdview/core'; +import { ThemeEngine as CoreThemeEngine } from '@mdview/core'; +import { debug } from '../utils/debug-logger'; + +export type { ThemeInfo } from '@mdview/core'; + +// --------------------------------------------------------------------------- +// Chrome StorageAdapter +// --------------------------------------------------------------------------- + +const chromeStorageAdapter: StorageAdapter = { + async getSync(keys: string | string[]): Promise> { + return chrome.storage.sync.get(keys) as Promise>; + }, + async setSync(data: Record): Promise { + await chrome.storage.sync.set(data); + }, + async getLocal(keys: string | string[]): Promise> { + return chrome.storage.local.get(keys) as Promise>; + }, + async setLocal(data: Record): Promise { + await chrome.storage.local.set(data); + }, +}; + +// --------------------------------------------------------------------------- +// Chrome ThemeEngine — composition over the core engine +// --------------------------------------------------------------------------- + +export class ThemeEngine { + private core: InstanceType; + + constructor() { + this.core = new CoreThemeEngine(chromeStorageAdapter); + } + + /** + * Load theme by name (delegated to core) + */ + async loadTheme(themeName: ThemeName): Promise { + return this.core.loadTheme(themeName); + } + + /** + * Get currently applied theme + */ + getCurrentTheme(): Theme | null { + return this.core.getCurrentTheme(); + } + + /** + * Get list of available themes + */ + getAvailableThemes(): Array<{ + name: ThemeName; + displayName: string; + variant: 'light' | 'dark'; + preview?: string; + }> { + return this.core.getAvailableThemes(); + } + + /** + * Compile theme to CSS variables (delegated to core) + */ + compileToCSSVariables( + theme: Theme, + overrides: Partial = {} + ): Record { + return this.core.compileToCSSVariables(theme, overrides); + } + + /** + * Apply theme to document (DOM-specific) + */ + async applyTheme(theme: Theme | ThemeName): Promise { + debug.log( + 'ThemeEngine', + `applyTheme called with:`, + typeof theme === 'string' ? theme : theme.name + ); + + // Load theme if name provided + const themeObj: Theme = typeof theme === 'string' ? await this.loadTheme(theme) : theme; + debug.log('ThemeEngine', `Theme loaded/resolved:`, themeObj.name); + + // Fetch overrides from storage via the core adapter path + const overrides: ThemeOverrides = await this.core.getStorageOverrides(); + + // Compile to CSS variables with overrides + const cssVars = this.compileToCSSVariables(themeObj, overrides); + + // Apply transition class + const root = document.documentElement; + root.classList.add('theme-transitioning'); + + // Update CSS variables on both :root and documentElement for immediate effect + debug.log( + 'ThemeEngine', + `Applying ${Object.keys(cssVars).length} CSS variables to :root and html` + ); + Object.entries(cssVars).forEach(([key, value]) => { + root.style.setProperty(key, value); + // Force immediate style recalculation for critical color variables + if (key === '--md-bg' || key === '--md-fg') { + document.documentElement.style.setProperty(key, value); + document.body.style.setProperty(key, value); + } + }); + + // Apply max-width logic + if (overrides.useMaxWidth) { + // If "Use Full Width" is checked, set max-width to none or 100% + root.style.setProperty('--md-max-width', '100%'); + } else if (overrides.maxWidth) { + // Apply custom max-width if set + root.style.setProperty('--md-max-width', `${overrides.maxWidth}px`); + } else { + // Default + root.style.setProperty('--md-max-width', '980px'); + } + + // Set data attributes + root.setAttribute('data-theme', themeObj.name); + root.setAttribute('data-theme-variant', themeObj.variant); + + // Apply background color directly to body and html to prevent white flash + document.documentElement.style.backgroundColor = themeObj.colors.background; + document.body.style.backgroundColor = themeObj.colors.background; + document.documentElement.style.color = themeObj.colors.foreground; + document.body.style.color = themeObj.colors.foreground; + + // Update syntax theme + debug.log('ThemeEngine', `Updating syntax theme to: ${themeObj.syntaxTheme}`); + await this.updateSyntaxTheme(themeObj.syntaxTheme); + + // Update mermaid theme + try { + const { mermaidRenderer } = await import('@mdview/core'); + mermaidRenderer.updateTheme(themeObj.mermaidTheme); + } catch (error) { + debug.error('ThemeEngine', 'Failed to update mermaid theme:', error); + } + + // Remove transition class after a brief moment (non-blocking) + requestAnimationFrame(() => { + requestAnimationFrame(() => { + root.classList.remove('theme-transitioning'); + }); + }); + + // Save current theme + this.core.setCurrentTheme(themeObj); + + debug.log('ThemeEngine', `Successfully applied theme: ${themeObj.name}`); + } + + /** + * Watch system theme preference + */ + watchSystemTheme(callback: (isDark: boolean) => void): () => void { + const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)'); + + const handler = (e: MediaQueryListEvent | MediaQueryList) => { + callback(e.matches); + }; + + // Initial call + handler(mediaQuery); + + // Listen for changes + mediaQuery.addEventListener('change', handler); + + // Return cleanup function + return () => { + mediaQuery.removeEventListener('change', handler); + }; + } + + /** + * Update syntax highlighting theme + */ + private async updateSyntaxTheme(syntaxTheme: string): Promise { + try { + const { syntaxHighlighter } = await import('@mdview/core'); + syntaxHighlighter.setTheme(syntaxTheme); + } catch (error) { + debug.error('ThemeEngine', 'Failed to update syntax theme:', error); + } + } +} + +// Export singleton +export const themeEngine = new ThemeEngine(); diff --git a/src/native-host/host-logic.ts b/packages/chrome-ext/src/native-host/host-logic.ts similarity index 90% rename from src/native-host/host-logic.ts rename to packages/chrome-ext/src/native-host/host-logic.ts index fc6b91d..a8e158f 100644 --- a/src/native-host/host-logic.ts +++ b/packages/chrome-ext/src/native-host/host-logic.ts @@ -98,12 +98,10 @@ export function handleMessage(msg: HostMessage | null | string): HostResponse { const existingBound = findContentBoundary(existing, V1_SEP, V2_PREFIX); const newBound = findContentBoundary(newContent, V1_SEP, V2_PREFIX); - const existingBody = existingBound !== -1 - ? existing.substring(0, existingBound).trimEnd() - : existing.trimEnd(); - const newBody = newBound !== -1 - ? newContent.substring(0, newBound).trimEnd() - : newContent.trimEnd(); + const existingBody = + existingBound !== -1 ? existing.substring(0, existingBound).trimEnd() : existing.trimEnd(); + const newBody = + newBound !== -1 ? newContent.substring(0, newBound).trimEnd() : newContent.trimEnd(); // Strip both v1 and v2 marker formats for comparison const V1_REF = /\[\^comment-\d+\]/g; @@ -113,7 +111,8 @@ export function handleMessage(msg: HostMessage | null | string): HostResponse { if (existingClean !== newClean) { return { - error: 'Refused: write would modify document content beyond comment markers. Only comment changes are allowed.', + error: + 'Refused: write would modify document content beyond comment markers. Only comment changes are allowed.', }; } diff --git a/src/native-host/manifest.json b/packages/chrome-ext/src/native-host/manifest.json similarity index 100% rename from src/native-host/manifest.json rename to packages/chrome-ext/src/native-host/manifest.json diff --git a/src/options/options.css b/packages/chrome-ext/src/options/options.css similarity index 100% rename from src/options/options.css rename to packages/chrome-ext/src/options/options.css diff --git a/src/options/options.html b/packages/chrome-ext/src/options/options.html similarity index 100% rename from src/options/options.html rename to packages/chrome-ext/src/options/options.html diff --git a/src/options/options.ts b/packages/chrome-ext/src/options/options.ts similarity index 99% rename from src/options/options.ts rename to packages/chrome-ext/src/options/options.ts index 5f97676..92e5388 100644 --- a/src/options/options.ts +++ b/packages/chrome-ext/src/options/options.ts @@ -3,7 +3,7 @@ * Manages settings page UI and interactions */ -import type { AppState, ThemeName, LogLevel, PaperSize } from '../types'; +import type { AppState, ThemeName, LogLevel, PaperSize } from '@mdview/core'; import { debug } from '../utils/debug-logger'; class OptionsManager { @@ -363,7 +363,7 @@ class OptionsManager { const previewEl = document.getElementById('filename-preview-text'); if (previewEl) { // Dynamic import to avoid circular dependency - import('../utils/filename-generator') + import('@mdview/core') .then(({ FilenameGenerator }) => { const preview = FilenameGenerator.generate({ title: 'My Document', diff --git a/src/popup/popup.css b/packages/chrome-ext/src/popup/popup.css similarity index 100% rename from src/popup/popup.css rename to packages/chrome-ext/src/popup/popup.css diff --git a/src/popup/popup.html b/packages/chrome-ext/src/popup/popup.html similarity index 100% rename from src/popup/popup.html rename to packages/chrome-ext/src/popup/popup.html diff --git a/src/popup/popup.ts b/packages/chrome-ext/src/popup/popup.ts similarity index 99% rename from src/popup/popup.ts rename to packages/chrome-ext/src/popup/popup.ts index 8871ceb..15b1b40 100644 --- a/src/popup/popup.ts +++ b/packages/chrome-ext/src/popup/popup.ts @@ -3,7 +3,7 @@ * Manages popup UI and interactions */ -import type { AppState, ThemeName, LogLevel } from '../types'; +import type { AppState, ThemeName, LogLevel } from '@mdview/core'; import { debug } from '../utils/debug-logger'; class PopupManager { diff --git a/packages/chrome-ext/src/ui/export-ui.ts b/packages/chrome-ext/src/ui/export-ui.ts new file mode 100644 index 0000000..426cf17 --- /dev/null +++ b/packages/chrome-ext/src/ui/export-ui.ts @@ -0,0 +1,40 @@ +// Re-export shim: export-ui has moved to @mdview/core +// This shim provides Chrome extension MessagingAdapter and platform-specific factories. +// It will be removed in Phase 2.9 + +import type { ExportUIOptions, MessagingAdapter, IPCMessage } from '@mdview/core'; +import { ExportUI as CoreExportUI, type CoreExportUIOptions } from '@mdview/core'; + +/** Chrome extension MessagingAdapter using chrome.runtime.sendMessage */ +class ChromeMessagingAdapter implements MessagingAdapter { + async send(message: IPCMessage): Promise { + return chrome.runtime.sendMessage(message); + } +} + +/** + * ExportUI wrapper that injects Chrome-specific dependencies. + * + * Maintains the same constructor signature as the original so that + * existing call-sites (e.g. content-script.ts) continue to work + * without modification. + */ +export class ExportUI extends CoreExportUI { + constructor(options?: ExportUIOptions) { + const coreOptions: CoreExportUIOptions = { + ...options, + messaging: new ChromeMessagingAdapter(), + factories: { + createExportController: async () => { + const mod = await import('@mdview/core'); + return new mod.ExportController(); + }, + createPDFGenerator: async () => { + const mod = await import('@mdview/core'); + return new mod.PDFGenerator(); + }, + }, + }; + super(coreOptions); + } +} diff --git a/packages/chrome-ext/src/utils/debug-logger.ts b/packages/chrome-ext/src/utils/debug-logger.ts new file mode 100644 index 0000000..eeb9192 --- /dev/null +++ b/packages/chrome-ext/src/utils/debug-logger.ts @@ -0,0 +1,59 @@ +/** + * Debug Logger — Chrome extension shim + * + * Re-exports the platform-agnostic debug-logger from @mdview/core, + * pre-configured with a Chrome StorageAdapter that reads from + * chrome.storage.sync. Existing callers continue to import + * `debug` and `debugLogger` without any changes. + */ + +import type { StorageAdapter, LogLevel } from '@mdview/core'; +import { DebugLogger as CoreDebugLogger } from '@mdview/core'; + +// --------------------------------------------------------------------------- +// Chrome StorageAdapter (sync-only for preferences) +// --------------------------------------------------------------------------- + +class ChromeStorageAdapter implements StorageAdapter { + async getSync(keys: string | string[]): Promise> { + return chrome.storage.sync.get(keys) as Promise>; + } + + async setSync(data: Record): Promise { + await chrome.storage.sync.set(data); + } + + async getLocal(keys: string | string[]): Promise> { + return chrome.storage.local.get(keys) as Promise>; + } + + async setLocal(data: Record): Promise { + await chrome.storage.local.set(data); + } +} + +// --------------------------------------------------------------------------- +// Singleton with Chrome adapter +// --------------------------------------------------------------------------- + +const chromeAdapter = new ChromeStorageAdapter(); +export const debugLogger = new CoreDebugLogger(chromeAdapter); + +// Export convenience functions — identical shape to the original +export const debug = { + log: (context: string, ...args: unknown[]) => debugLogger.log(context, ...args), + debug: (context: string, ...args: unknown[]) => debugLogger.debug(context, ...args), + info: (context: string, ...args: unknown[]) => debugLogger.info(context, ...args), + warn: (context: string, ...args: unknown[]) => debugLogger.warn(context, ...args), + error: (context: string, ...args: unknown[]) => debugLogger.error(context, ...args), + group: (context: string, label: string) => debugLogger.group(context, label), + groupEnd: () => debugLogger.groupEnd(), + table: (context: string, data: unknown) => debugLogger.table(context, data), + time: (context: string, label: string) => debugLogger.time(context, label), + timeEnd: (context: string, label: string) => debugLogger.timeEnd(context, label), + setLogLevel: (level: LogLevel) => debugLogger.setLogLevel(level), + getLogLevel: () => debugLogger.getLogLevel(), + // Compat + setDebugMode: (enabled: boolean) => debugLogger.setLogLevel(enabled ? 'debug' : 'error'), + isDebugEnabled: () => debugLogger.getLogLevel() === 'debug', +}; diff --git a/packages/chrome-ext/src/utils/file-scanner.ts b/packages/chrome-ext/src/utils/file-scanner.ts new file mode 100644 index 0000000..163d6d8 --- /dev/null +++ b/packages/chrome-ext/src/utils/file-scanner.ts @@ -0,0 +1,185 @@ +/** + * Re-export shim: delegates to @mdview/core FileScanner and adds + * Chrome extension-specific methods (window.location, chrome.runtime). + */ + +import { FileScanner as CoreFileScanner } from '@mdview/core'; +import type { FileAdapter, FileChangeInfo } from '@mdview/core'; +import { debug } from './debug-logger'; + +/** + * Browser-aware FileScanner that extends core with Chrome-specific functionality. + * + * Pure utility methods (hasMarkdownExtension, generateHash, validateFileSize, + * formatFileSize, getFileSize) are inherited from the core class. + * + * Browser-specific methods (isSiteBlocked, isMarkdownFile, getCurrentSiteIdentifier, + * getFilePath, readFileContent, watchFile) are defined here. + */ +export class FileScanner extends CoreFileScanner { + private static readonly MARKDOWN_MIME_TYPES_BROWSER = ['text/markdown', 'text/x-markdown']; + + /** + * Check if the current site is in the blocklist. + * Uses window.location for URL detection (Chrome extension only). + */ + static isSiteBlocked(blocklist: string[]): boolean { + if (!blocklist || blocklist.length === 0) { + return false; + } + + const url = window.location.href; + const hostname = window.location.hostname; + const pathname = window.location.pathname; + + return this.isSiteBlockedFromList(blocklist, url, hostname, pathname); + } + + /** + * Get the current site identifier for display (hostname or file path). + */ + static getCurrentSiteIdentifier(): string { + const url = window.location.href; + + if (url.startsWith('file://')) { + // For local files, show a truncated path + const path = window.location.pathname; + const parts = path.split('/'); + if (parts.length > 3) { + return '.../' + parts.slice(-2).join('/'); + } + return path; + } + + // For web, show hostname + return window.location.hostname; + } + + /** + * Check if the current page is a markdown file + */ + static isMarkdownFile(): boolean { + const url = window.location.href; + const pathname = window.location.pathname; + + // Check protocol + const isLocal = url.startsWith('file://'); + const isWeb = url.startsWith('http://') || url.startsWith('https://'); + + if (!isLocal && !isWeb) { + return false; + } + + // Check by MIME type first if available (authoritative for web) + const contentType = document.contentType; + if (contentType && this.MARKDOWN_MIME_TYPES_BROWSER.includes(contentType)) { + return true; + } + + // For web, if content type is explicitly HTML, do not activate + // (prevents rendering on GitHub UI pages which end in .md) + if (isWeb && (contentType === 'text/html' || contentType === 'application/xhtml+xml')) { + return false; + } + + // Check by extension + if (this.hasMarkdownExtension(pathname)) { + return true; + } + + return false; + } + + /** + * Get the current file path + */ + static getFilePath(): string { + return window.location.pathname; + } + + /** + * Read file content from the page or source. + * For file:// URLs, Chrome displays the content in a 
 tag initially.
+   */
+  static readFileContent(forceFetch = false): string {
+    // For file:// URLs, Chrome displays the content in a 
 tag
+    // Initial load check
+    if (!forceFetch) {
+      const pre = document.querySelector('pre');
+      if (pre) {
+        return pre.textContent || '';
+      }
+      // If body is not cleared yet
+      if (!document.getElementById('mdview-container')) {
+        return document.body.textContent || '';
+      }
+    }
+
+    return document.body.textContent || '';
+  }
+
+  /**
+   * Monitor file changes using polling via background script delegation.
+   * This preserves the original Chrome extension signature while delegating
+   * to the core FileScanner with a Chrome FileAdapter.
+   */
+  static watchFile(initialHash: string, callback: () => void, interval = 1000): () => void {
+    const fileUrl = window.location.href;
+
+    debug.info('FileScanner', `Starting background-delegated file watcher for ${fileUrl}`);
+
+    // Create a Chrome-specific file adapter that wraps chrome.runtime.sendMessage
+    // and also handles extension context invalidation errors
+    const chromeAdapter: FileAdapter = {
+      writeFile() {
+        return Promise.resolve({ success: false, error: 'Not supported via Chrome messaging' });
+      },
+      readFile() {
+        return Promise.reject(new Error('Not supported via Chrome messaging'));
+      },
+      async checkChanged(url: string, lastHash: string): Promise {
+        try {
+          const response: unknown = await chrome.runtime.sendMessage({
+            type: 'CHECK_FILE_CHANGED',
+            payload: { url, lastHash },
+          });
+          const typed = response as {
+            error?: string;
+            changed?: boolean;
+            newHash?: string;
+          };
+          return {
+            changed: typed.changed ?? false,
+            newHash: typed.newHash,
+            error: typed.error,
+          };
+        } catch (error) {
+          // Handle extension context invalidation
+          const errorStr = String(error).toLowerCase();
+          const errorMessage = error instanceof Error ? error.message.toLowerCase() : '';
+
+          const isContextInvalid =
+            errorStr.includes('context invalidated') ||
+            errorStr.includes('extension context') ||
+            errorMessage.includes('context invalidated');
+
+          if (isContextInvalid) {
+            debug.warn('FileScanner', 'Extension context invalidated.');
+          } else {
+            debug.error('FileScanner', 'Error communicating with background:', error);
+          }
+
+          throw error;
+        }
+      },
+      watch() {
+        return () => {};
+      },
+    };
+
+    return CoreFileScanner.watchFile(fileUrl, initialHash, callback, {
+      fileAdapter: chromeAdapter,
+      interval,
+    });
+  }
+}
diff --git a/packages/chrome-ext/tsconfig.json b/packages/chrome-ext/tsconfig.json
new file mode 100644
index 0000000..3fda8ee
--- /dev/null
+++ b/packages/chrome-ext/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "composite": true,
+    "rootDir": "src",
+    "baseUrl": ".",
+    "paths": {},
+    "types": ["chrome", "vite/client", "vitest/globals"]
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}
diff --git a/vite.config.ts b/packages/chrome-ext/vite.config.ts
similarity index 100%
rename from vite.config.ts
rename to packages/chrome-ext/vite.config.ts
diff --git a/packages/core/package.json b/packages/core/package.json
new file mode 100644
index 0000000..f10326c
--- /dev/null
+++ b/packages/core/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "@mdview/core",
+  "version": "0.0.1",
+  "description": "Core rendering engine for mdview",
+  "type": "module",
+  "exports": {
+    ".": "./src/index.ts",
+    "./utils/debug-logger": "./src/utils/debug-logger.ts",
+    "./adapters": "./src/adapters.ts"
+  },
+  "scripts": {
+    "test": "vitest",
+    "test:ci": "vitest --run"
+  },
+  "dependencies": {
+    "@jamesainslie/docx": "^9.5.1-svg.1",
+    "dompurify": "^3.0.6",
+    "highlight.js": "^11.9.0",
+    "markdown-it": "^14.1.0",
+    "markdown-it-anchor": "^8.6.7",
+    "markdown-it-attrs": "^4.1.6",
+    "markdown-it-emoji": "^3.0.0",
+    "markdown-it-footnote": "^4.0.0",
+    "markdown-it-task-lists": "^2.1.1",
+    "mermaid": "^11.12.1",
+    "panzoom": "^9.4.3"
+  },
+  "devDependencies": {
+    "@types/dompurify": "^3.0.5",
+    "@types/markdown-it": "^13.0.9"
+  },
+  "author": "James Ainslie",
+  "license": "MIT"
+}
diff --git a/packages/core/src/__tests__/adapters.test.ts b/packages/core/src/__tests__/adapters.test.ts
new file mode 100644
index 0000000..6798c74
--- /dev/null
+++ b/packages/core/src/__tests__/adapters.test.ts
@@ -0,0 +1,205 @@
+import {
+  NoopStorageAdapter,
+  NoopMessagingAdapter,
+  NoopFileAdapter,
+  NoopIdentityAdapter,
+  NoopExportAdapter,
+  createNoopAdapters,
+} from '../adapters';
+import type {
+  StorageAdapter,
+  MessagingAdapter,
+  FileAdapter,
+  IdentityAdapter,
+  ExportAdapter,
+  PlatformAdapters,
+} from '../adapters';
+
+describe('Platform Adapters', () => {
+  describe('StorageAdapter (NoopStorageAdapter)', () => {
+    let storage: StorageAdapter;
+
+    beforeEach(() => {
+      storage = new NoopStorageAdapter();
+    });
+
+    it('returns empty object for unknown sync keys', async () => {
+      const result = await storage.getSync('nonexistent');
+      expect(result).toEqual({});
+    });
+
+    it('stores and retrieves sync values', async () => {
+      await storage.setSync({ theme: 'github-dark', fontSize: 14 });
+      const result = await storage.getSync(['theme', 'fontSize']);
+      expect(result).toEqual({ theme: 'github-dark', fontSize: 14 });
+    });
+
+    it('returns empty object for unknown local keys', async () => {
+      const result = await storage.getLocal(['missing']);
+      expect(result).toEqual({});
+    });
+
+    it('stores and retrieves local values', async () => {
+      await storage.setLocal({ scrollPos: 500 });
+      const result = await storage.getLocal('scrollPos');
+      expect(result).toEqual({ scrollPos: 500 });
+    });
+
+    it('handles string key argument for getSync', async () => {
+      await storage.setSync({ preferences: { logLevel: 'debug' } });
+      const result = await storage.getSync('preferences');
+      expect(result).toEqual({ preferences: { logLevel: 'debug' } });
+    });
+  });
+
+  describe('MessagingAdapter (NoopMessagingAdapter)', () => {
+    let messaging: MessagingAdapter;
+
+    beforeEach(() => {
+      messaging = new NoopMessagingAdapter();
+    });
+
+    it('returns empty object for any message', async () => {
+      const result = await messaging.send({ type: 'GET_STATE' });
+      expect(result).toEqual({});
+    });
+
+    it('handles messages with payloads', async () => {
+      const result = await messaging.send({
+        type: 'CACHE_GET',
+        payload: { key: 'test-key' },
+      });
+      expect(result).toEqual({});
+    });
+  });
+
+  describe('FileAdapter (NoopFileAdapter)', () => {
+    let file: FileAdapter;
+
+    beforeEach(() => {
+      file = new NoopFileAdapter();
+    });
+
+    it('writeFile returns failure', async () => {
+      const result = await file.writeFile('/tmp/test.md', '# Hello');
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+    });
+
+    it('readFile throws', async () => {
+      await expect(file.readFile('/tmp/test.md')).rejects.toThrow(
+        'No file adapter configured'
+      );
+    });
+
+    it('checkChanged returns unchanged', async () => {
+      const result = await file.checkChanged('file:///test.md', 'abc123');
+      expect(result.changed).toBe(false);
+    });
+
+    it('watch returns a no-op unsubscribe function', () => {
+      const unsubscribe = file.watch('/tmp', () => {});
+      expect(typeof unsubscribe).toBe('function');
+      unsubscribe(); // should not throw
+    });
+  });
+
+  describe('IdentityAdapter (NoopIdentityAdapter)', () => {
+    let identity: IdentityAdapter;
+
+    beforeEach(() => {
+      identity = new NoopIdentityAdapter();
+    });
+
+    it('returns empty string username', async () => {
+      const username = await identity.getUsername();
+      expect(username).toBe('');
+    });
+  });
+
+  describe('ExportAdapter (NoopExportAdapter)', () => {
+    let exporter: ExportAdapter;
+
+    beforeEach(() => {
+      exporter = new NoopExportAdapter();
+    });
+
+    it('saveFile completes without error', async () => {
+      await expect(
+        exporter.saveFile({
+          filename: 'test.docx',
+          mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+          data: new Blob(['test']),
+        })
+      ).resolves.toBeUndefined();
+    });
+
+    it('printToPDF is not defined on noop adapter', () => {
+      expect(exporter.printToPDF).toBeUndefined();
+    });
+  });
+
+  describe('createNoopAdapters()', () => {
+    it('returns a complete PlatformAdapters bundle', () => {
+      const adapters: PlatformAdapters = createNoopAdapters();
+      expect(adapters.storage).toBeInstanceOf(NoopStorageAdapter);
+      expect(adapters.messaging).toBeInstanceOf(NoopMessagingAdapter);
+      expect(adapters.file).toBeInstanceOf(NoopFileAdapter);
+      expect(adapters.identity).toBeInstanceOf(NoopIdentityAdapter);
+      expect(adapters.export).toBeInstanceOf(NoopExportAdapter);
+    });
+  });
+
+  describe('Custom mock adapters satisfy interfaces', () => {
+    it('custom StorageAdapter implementation works', async () => {
+      const store = new Map();
+      const custom: StorageAdapter = {
+        async getSync(keys) {
+          const keyList = Array.isArray(keys) ? keys : [keys];
+          const result: Record = {};
+          for (const k of keyList) {
+            if (store.has(k)) result[k] = store.get(k);
+          }
+          return result;
+        },
+        async setSync(data) {
+          for (const [k, v] of Object.entries(data)) store.set(k, v);
+        },
+        async getLocal(keys) {
+          return this.getSync(keys);
+        },
+        async setLocal(data) {
+          return this.setSync(data);
+        },
+      };
+
+      await custom.setSync({ key1: 'value1' });
+      expect(await custom.getSync('key1')).toEqual({ key1: 'value1' });
+    });
+
+    it('custom FileAdapter with in-memory fs works', async () => {
+      const files = new Map();
+      const custom: FileAdapter = {
+        async writeFile(path, content) {
+          files.set(path, content);
+          return { success: true };
+        },
+        async readFile(path) {
+          const content = files.get(path);
+          if (!content) throw new Error(`File not found: ${path}`);
+          return content;
+        },
+        async checkChanged(_url, _lastHash) {
+          return { changed: true, newHash: 'new-hash' };
+        },
+        watch(_path, _callback) {
+          return () => {};
+        },
+      };
+
+      await custom.writeFile('/test.md', '# Hello');
+      const content = await custom.readFile('/test.md');
+      expect(content).toBe('# Hello');
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/barrel-export.test.ts b/packages/core/src/__tests__/barrel-export.test.ts
new file mode 100644
index 0000000..3881805
--- /dev/null
+++ b/packages/core/src/__tests__/barrel-export.test.ts
@@ -0,0 +1,138 @@
+/**
+ * Test that all public APIs are accessible via the @mdview/core barrel export.
+ */
+import {
+  // Version
+  VERSION,
+  // Themes
+  githubLight,
+  githubDark,
+  catppuccinLatte,
+  catppuccinFrappe,
+  catppuccinMacchiato,
+  catppuccinMocha,
+  monokai,
+  monokaiPro,
+  // Comment parsers (v2 annotation format)
+  detectFormat,
+  parseAnnotations,
+  // Comment serializers (v2 annotation format)
+  generateNextCommentId,
+  addComment,
+  addCommentAtOffset,
+  removeComment,
+  updateComment,
+  resolveComment,
+  updateCommentMetadata,
+  addReply,
+  toggleReaction,
+  // Comment parsers (v1 legacy)
+  parseComments,
+  // Comment context & utilities
+  computeCommentContext,
+  buildSourceMap,
+  findInsertionPoint,
+  QUICK_EMOJIS,
+  EMOJI_CATEGORIES,
+  searchEmojis,
+  // Utilities
+  splitIntoSections,
+  splitIntoChunks,
+  FilenameGenerator,
+  stripTableOfContents,
+  // Markdown converter
+  MarkdownConverter,
+  markdownConverter,
+  // Cache manager
+  CacheManager,
+  cacheManager,
+  // Frontmatter
+  extractFrontmatter,
+  renderFrontmatterHtml,
+  // Debug logger
+  DebugLogger,
+  createDebugLogger,
+  createDebug,
+} from '../index';
+
+describe('@mdview/core barrel export', () => {
+  it('exports VERSION', () => {
+    expect(VERSION).toBe('0.0.1');
+  });
+
+  it('exports all 8 themes', () => {
+    const themes = [
+      githubLight,
+      githubDark,
+      catppuccinLatte,
+      catppuccinFrappe,
+      catppuccinMacchiato,
+      catppuccinMocha,
+      monokai,
+      monokaiPro,
+    ];
+    for (const theme of themes) {
+      expect(theme).toHaveProperty('name');
+      expect(theme).toHaveProperty('colors');
+      expect(theme).toHaveProperty('variant');
+    }
+  });
+
+  it('exports v2 annotation parsers', () => {
+    expect(typeof detectFormat).toBe('function');
+    expect(typeof parseAnnotations).toBe('function');
+  });
+
+  it('exports v2 annotation serializer functions', () => {
+    expect(typeof generateNextCommentId).toBe('function');
+    expect(typeof addComment).toBe('function');
+    expect(typeof addCommentAtOffset).toBe('function');
+    expect(typeof removeComment).toBe('function');
+    expect(typeof updateComment).toBe('function');
+    expect(typeof resolveComment).toBe('function');
+    expect(typeof updateCommentMetadata).toBe('function');
+    expect(typeof addReply).toBe('function');
+    expect(typeof toggleReaction).toBe('function');
+  });
+
+  it('exports v1 legacy parser', () => {
+    expect(typeof parseComments).toBe('function');
+  });
+
+  it('exports comment context and utilities', () => {
+    expect(typeof computeCommentContext).toBe('function');
+    expect(typeof buildSourceMap).toBe('function');
+    expect(typeof findInsertionPoint).toBe('function');
+    expect(QUICK_EMOJIS).toBeDefined();
+    expect(EMOJI_CATEGORIES).toBeDefined();
+    expect(typeof searchEmojis).toBe('function');
+  });
+
+  it('exports utility functions', () => {
+    expect(typeof splitIntoSections).toBe('function');
+    expect(typeof splitIntoChunks).toBe('function');
+    expect(FilenameGenerator).toBeDefined();
+    expect(typeof stripTableOfContents).toBe('function');
+  });
+
+  it('exports markdown converter', () => {
+    expect(MarkdownConverter).toBeDefined();
+    expect(markdownConverter).toBeInstanceOf(MarkdownConverter);
+  });
+
+  it('exports cache manager', () => {
+    expect(CacheManager).toBeDefined();
+    expect(cacheManager).toBeInstanceOf(CacheManager);
+  });
+
+  it('exports frontmatter functions', () => {
+    expect(typeof extractFrontmatter).toBe('function');
+    expect(typeof renderFrontmatterHtml).toBe('function');
+  });
+
+  it('exports debug logger', () => {
+    expect(DebugLogger).toBeDefined();
+    expect(typeof createDebugLogger).toBe('function');
+    expect(typeof createDebug).toBe('function');
+  });
+});
diff --git a/packages/core/src/__tests__/comment-manager.test.ts b/packages/core/src/__tests__/comment-manager.test.ts
new file mode 100644
index 0000000..7aa0243
--- /dev/null
+++ b/packages/core/src/__tests__/comment-manager.test.ts
@@ -0,0 +1,393 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { CommentManager } from '../comments/comment-manager';
+import type { FileAdapter, IdentityAdapter, FileWriteResult } from '../adapters';
+import type { AppState } from '../types/index';
+
+/**
+ * Minimal mock DOM environment for CommentManager tests.
+ * The manager requires DOM elements (window, document, etc.) which
+ * jsdom provides. We mock the UI and highlighter dependencies since
+ * they are browser-specific and not extracted to core yet.
+ */
+
+// Mock the DOM-dependent comment UI modules (now in core/src/comments/)
+vi.mock('../comments/comment-ui', () => {
+  class MockCommentUI {
+    setCurrentAuthor = vi.fn();
+    renderCard = vi.fn().mockReturnValue(document.createElement('div'));
+    renderInputForm = vi.fn().mockReturnValue(document.createElement('div'));
+    renderReplyForm = vi.fn().mockReturnValue(document.createElement('div'));
+    renderEmojiPicker = vi.fn().mockReturnValue(document.createElement('div'));
+    showToast = vi.fn();
+    destroy = vi.fn();
+  }
+  return { CommentUI: MockCommentUI };
+});
+
+vi.mock('../comments/comment-highlight', () => {
+  class MockCommentHighlighter {
+    highlightComment = vi.fn();
+    clearActive = vi.fn();
+    setActive = vi.fn();
+    setResolved = vi.fn();
+    removeHighlight = vi.fn();
+    getHighlightElement = vi.fn().mockReturnValue(null);
+  }
+  return { CommentHighlighter: MockCommentHighlighter };
+});
+
+function createMockFileAdapter(
+  overrides: Partial = {}
+): FileAdapter {
+  return {
+    writeFile: vi.fn().mockResolvedValue({ success: true } as FileWriteResult),
+    readFile: vi.fn().mockResolvedValue(''),
+    checkChanged: vi.fn().mockResolvedValue({ changed: false }),
+    watch: vi.fn().mockReturnValue(() => {}),
+    ...overrides,
+  };
+}
+
+function createMockIdentityAdapter(
+  overrides: Partial = {}
+): IdentityAdapter {
+  return {
+    getUsername: vi.fn().mockResolvedValue('test-user'),
+    ...overrides,
+  };
+}
+
+function createMinimalPreferences(): AppState['preferences'] {
+  return {
+    theme: 'github-light',
+    autoTheme: false,
+    lightTheme: 'github-light',
+    darkTheme: 'github-dark',
+    syntaxTheme: 'default',
+    autoReload: false,
+    lineNumbers: false,
+    enableHtml: false,
+    syncTabs: false,
+    logLevel: 'none',
+    commentsEnabled: true,
+  };
+}
+
+const SAMPLE_MARKDOWN = `# Hello World
+
+This is a test document.
+
+Some content here.
+`;
+
+describe('CommentManager (core)', () => {
+  let manager: CommentManager;
+
+  beforeEach(() => {
+    // Set up a basic DOM container
+    const container = document.createElement('div');
+    container.id = 'mdview-container';
+    container.textContent = 'This is a test document. Some content here.';
+    document.body.appendChild(container);
+  });
+
+  afterEach(() => {
+    if (manager) {
+      manager.destroy();
+    }
+    document.body.innerHTML = '';
+  });
+
+  describe('with FileAdapter and IdentityAdapter', () => {
+    it('uses IdentityAdapter to get username when no author is configured', async () => {
+      const identity = createMockIdentityAdapter({
+        getUsername: vi.fn().mockResolvedValue('adapter-user'),
+      });
+      const file = createMockFileAdapter();
+
+      manager = new CommentManager({ file, identity });
+      const result = await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      expect(identity.getUsername).toHaveBeenCalled();
+      expect(result).toBeDefined();
+      expect(result.comments).toEqual([]);
+    });
+
+    it('prefers preferences.commentAuthor over IdentityAdapter', async () => {
+      const identity = createMockIdentityAdapter({
+        getUsername: vi.fn().mockResolvedValue('adapter-user'),
+      });
+      const file = createMockFileAdapter();
+
+      manager = new CommentManager({ file, identity });
+      const prefs = createMinimalPreferences();
+      prefs.commentAuthor = 'pref-author';
+
+      await manager.initialize(SAMPLE_MARKDOWN, '/test/file.md', prefs);
+
+      // Should NOT call getUsername since author is already set
+      expect(identity.getUsername).not.toHaveBeenCalled();
+    });
+
+    it('uses FileAdapter.writeFile when adding a comment', async () => {
+      const file = createMockFileAdapter();
+      const identity = createMockIdentityAdapter();
+
+      manager = new CommentManager({ file, identity });
+      await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await manager.addComment('test document', 'My note');
+
+      expect(file.writeFile).toHaveBeenCalledWith(
+        '/test/file.md',
+        expect.stringContaining('My note')
+      );
+    });
+
+    it('uses FileAdapter.writeFile when editing a comment', async () => {
+      const mdWithComment = `# Hello World
+
+This is a test[@1] document.
+
+
+`;
+      const file = createMockFileAdapter();
+      const identity = createMockIdentityAdapter();
+
+      manager = new CommentManager({ file, identity });
+      await manager.initialize(
+        mdWithComment,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await manager.editComment('comment-1', 'Updated note');
+
+      expect(file.writeFile).toHaveBeenCalledWith(
+        '/test/file.md',
+        expect.stringContaining('Updated note')
+      );
+    });
+
+    it('uses FileAdapter.writeFile when resolving a comment', async () => {
+      const mdWithComment = `# Hello
+
+Test[@1] content.
+
+
+`;
+      const file = createMockFileAdapter();
+      const identity = createMockIdentityAdapter();
+
+      manager = new CommentManager({ file, identity });
+      await manager.initialize(
+        mdWithComment,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await manager.resolveComment('comment-1');
+
+      expect(file.writeFile).toHaveBeenCalled();
+    });
+
+    it('uses FileAdapter.writeFile when deleting a comment', async () => {
+      const mdWithComment = `# Hello
+
+Test[@1] content.
+
+
+`;
+      const file = createMockFileAdapter();
+      const identity = createMockIdentityAdapter();
+
+      manager = new CommentManager({ file, identity });
+      await manager.initialize(
+        mdWithComment,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await manager.deleteComment('comment-1');
+
+      expect(file.writeFile).toHaveBeenCalled();
+    });
+
+    it('reports write errors from FileAdapter', async () => {
+      const file = createMockFileAdapter({
+        writeFile: vi.fn().mockResolvedValue({
+          success: false,
+          error: 'Permission denied',
+        }),
+      });
+      const identity = createMockIdentityAdapter();
+
+      manager = new CommentManager({ file, identity });
+      await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      // Should not throw even if write fails
+      await expect(
+        manager.addComment('test', 'note')
+      ).resolves.not.toThrow();
+    });
+  });
+
+  describe('graceful degradation without adapters', () => {
+    it('initializes without any adapters', async () => {
+      manager = new CommentManager();
+      const result = await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      expect(result).toBeDefined();
+      expect(result.comments).toEqual([]);
+    });
+
+    it('uses empty username when no adapter and no preference set', async () => {
+      manager = new CommentManager();
+      await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      // Comments created should have empty author
+      const comments = manager.getComments();
+      expect(comments).toEqual([]);
+    });
+
+    it('addComment works without FileAdapter (skips write)', async () => {
+      manager = new CommentManager();
+      await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      // Should not throw even without file adapter
+      await expect(
+        manager.addComment('test document', 'A note')
+      ).resolves.not.toThrow();
+
+      const comments = manager.getComments();
+      expect(comments).toHaveLength(1);
+      expect(comments[0].body).toBe('A note');
+    });
+
+    it('editComment works without FileAdapter', async () => {
+      const mdWithComment = `# Hello
+
+Test[@1] content.
+
+
+`;
+      manager = new CommentManager();
+      await manager.initialize(
+        mdWithComment,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await expect(
+        manager.editComment('comment-1', 'Updated')
+      ).resolves.not.toThrow();
+    });
+
+    it('deleteComment works without FileAdapter', async () => {
+      const mdWithComment = `# Hello
+
+Test[@1] content.
+
+
+`;
+      manager = new CommentManager();
+      await manager.initialize(
+        mdWithComment,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await expect(
+        manager.deleteComment('comment-1')
+      ).resolves.not.toThrow();
+
+      expect(manager.getComments()).toHaveLength(0);
+    });
+
+    it('resolveComment works without FileAdapter', async () => {
+      const mdWithComment = `# Hello
+
+Test[@1] content.
+
+
+`;
+      manager = new CommentManager();
+      await manager.initialize(
+        mdWithComment,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await expect(
+        manager.resolveComment('comment-1')
+      ).resolves.not.toThrow();
+    });
+
+    it('provides partial adapters — only FileAdapter', async () => {
+      const file = createMockFileAdapter();
+
+      manager = new CommentManager({ file });
+      await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      await manager.addComment('test document', 'note');
+
+      // File adapter should be used for write
+      expect(file.writeFile).toHaveBeenCalled();
+    });
+
+    it('provides partial adapters — only IdentityAdapter', async () => {
+      const identity = createMockIdentityAdapter({
+        getUsername: vi.fn().mockResolvedValue('identity-only-user'),
+      });
+
+      manager = new CommentManager({ identity });
+      await manager.initialize(
+        SAMPLE_MARKDOWN,
+        '/test/file.md',
+        createMinimalPreferences()
+      );
+
+      expect(identity.getUsername).toHaveBeenCalled();
+
+      // addComment should still work (no file write, but no crash)
+      await expect(
+        manager.addComment('test', 'note')
+      ).resolves.not.toThrow();
+    });
+  });
+
+  describe('isWriteInProgress', () => {
+    it('returns false initially', () => {
+      manager = new CommentManager();
+      expect(manager.isWriteInProgress()).toBe(false);
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/comments/annotation-parser.test.ts b/packages/core/src/__tests__/comments/annotation-parser.test.ts
new file mode 100644
index 0000000..38552d4
--- /dev/null
+++ b/packages/core/src/__tests__/comments/annotation-parser.test.ts
@@ -0,0 +1,245 @@
+/**
+ * Tests for annotation parser — v2 format with v1 backward compatibility
+ */
+
+import { describe, it, expect, vi } from 'vitest';
+import { parseAnnotations, detectFormat } from '../../comments/annotation-parser';
+
+describe('detectFormat', () => {
+  it('should detect v1 format from sentinel', () => {
+    const md = `# Hello\n\n\n[^comment-1]: \n    body`;
+    expect(detectFormat(md)).toBe('v1');
+  });
+
+  it('should detect v2 format from sentinel', () => {
+    const md = `# Hello\n\n`;
+    expect(detectFormat(md)).toBe('v2');
+  });
+
+  it('should return none when neither sentinel is present', () => {
+    expect(detectFormat('# Just a document\n\nSome text.')).toBe('none');
+  });
+
+  it('should return v1 when both sentinels present (v1 takes priority)', () => {
+    const md = `# Hello\n\n\n`;
+    expect(detectFormat(md)).toBe('v1');
+  });
+
+  it('should handle empty string', () => {
+    expect(detectFormat('')).toBe('none');
+  });
+});
+
+describe('parseAnnotations', () => {
+  describe('No annotations', () => {
+    it('should return unchanged markdown and empty array when no annotations exist', () => {
+      const markdown = `# Hello World\n\nThis is a paragraph.\n\n## Section Two\n\nMore content here.`;
+      const result = parseAnnotations(markdown);
+      expect(result.cleanedMarkdown).toBe(markdown);
+      expect(result.comments).toEqual([]);
+    });
+
+    it('should handle empty markdown', () => {
+      const result = parseAnnotations('');
+      expect(result.cleanedMarkdown).toBe('');
+      expect(result.comments).toEqual([]);
+    });
+  });
+
+  describe('v2 single annotation', () => {
+    it('should parse a single annotation with all fields', () => {
+      const markdown = `Some highlighted[@1] text in context.
+
+`;
+
+      const result = parseAnnotations(markdown);
+
+      expect(result.comments).toHaveLength(1);
+      const comment = result.comments[0];
+      expect(comment.id).toBe('comment-1');
+      expect(comment.selectedText).toBe('highlighted');
+      expect(comment.anchorPrefix).toBe('Some ');
+      expect(comment.anchorSuffix).toBe(' text');
+      expect(comment.body).toBe('This needs attention');
+      expect(comment.author).toBe('reviewer');
+      expect(comment.date).toBe('2026-03-03T14:30:00Z');
+      expect(comment.resolved).toBe(false);
+    });
+
+    it('should remove [@N] markers from cleaned markdown', () => {
+      const markdown = `Some highlighted[@1] text in context.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.cleanedMarkdown).toBe('Some highlighted text in context.');
+      expect(result.cleanedMarkdown).not.toContain('[@1]');
+      expect(result.cleanedMarkdown).not.toContain('mdview:annotations');
+    });
+  });
+
+  describe('v2 multiple annotations', () => {
+    it('should parse multiple annotations', () => {
+      const markdown = `First[@1] and second[@2] words.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.comments).toHaveLength(2);
+      expect(result.comments[0].id).toBe('comment-1');
+      expect(result.comments[0].author).toBe('alice');
+      expect(result.comments[0].body).toBe('First comment');
+      expect(result.comments[1].id).toBe('comment-2');
+      expect(result.comments[1].author).toBe('bob');
+      expect(result.comments[1].body).toBe('Second comment');
+    });
+
+    it('should remove all [@N] markers from cleaned markdown', () => {
+      const markdown = `First[@1] and second[@2] words.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.cleanedMarkdown).toBe('First and second words.');
+    });
+  });
+
+  describe('v2 resolved annotations', () => {
+    it('should parse resolved flag', () => {
+      const markdown = `Some text[@1] here.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.comments[0].resolved).toBe(true);
+    });
+
+    it('should default resolved to false when not specified', () => {
+      const markdown = `Some text[@1] here.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.comments[0].resolved).toBe(false);
+    });
+  });
+
+  describe('v2 edge cases', () => {
+    it('should handle malformed JSON gracefully (warn, return empty)', () => {
+      const consoleSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+      const markdown = `Text[@1] here.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.comments).toEqual([]);
+      expect(result.cleanedMarkdown).toBe('Text here.');
+      consoleSpy.mockRestore();
+    });
+
+    it('should handle empty annotations array', () => {
+      const markdown = `Some text here.
+
+`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.comments).toEqual([]);
+      expect(result.cleanedMarkdown).toBe('Some text here.');
+    });
+  });
+
+  describe('v1 backward compatibility', () => {
+    it('should parse v1 format comments through delegation', () => {
+      const markdown = `Some highlighted text[^comment-1] in context.
+
+
+[^comment-1]: 
+    This API endpoint needs error handling
+    for the 404 case.`;
+
+      const result = parseAnnotations(markdown);
+
+      expect(result.comments).toHaveLength(1);
+      expect(result.comments[0].id).toBe('comment-1');
+      expect(result.comments[0].selectedText).toBe('text');
+      expect(result.comments[0].body).toBe('This API endpoint needs error handling\nfor the 404 case.');
+      expect(result.comments[0].author).toBe('reviewer');
+      expect(result.comments[0].date).toBe('2026-03-03T14:30:00Z');
+      expect(result.comments[0].resolved).toBe(false);
+    });
+
+    it('should remove v1 comment references from cleaned markdown', () => {
+      const markdown = `Some highlighted text[^comment-1] in context.
+
+
+[^comment-1]: 
+    This is a comment.`;
+
+      const result = parseAnnotations(markdown);
+      expect(result.cleanedMarkdown).toBe('Some highlighted text in context.');
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/comments/annotation-serializer.test.ts b/packages/core/src/__tests__/comments/annotation-serializer.test.ts
new file mode 100644
index 0000000..04701d0
--- /dev/null
+++ b/packages/core/src/__tests__/comments/annotation-serializer.test.ts
@@ -0,0 +1,197 @@
+/**
+ * Tests for Annotation Serializer (v2 format)
+ *
+ * Verifies v2 annotation operations: generating IDs, adding, removing,
+ * updating, resolving comments, replies, reactions, and v1 migration.
+ */
+
+import { describe, it, expect } from 'vitest';
+import {
+  generateNextCommentId,
+  addComment,
+  addCommentAtOffset,
+  removeComment,
+  updateComment,
+  resolveComment,
+  updateCommentMetadata,
+  addReply,
+  toggleReaction,
+} from '../../comments/annotation-serializer';
+import { parseAnnotations } from '../../comments/annotation-parser';
+import { buildSourceMap } from '../../comments/source-position-map';
+import type { Comment, CommentContext, CommentReply } from '../../types/index';
+
+function makeComment(overrides: Partial = {}): Comment {
+  return {
+    id: 'comment-1',
+    selectedText: 'highlighted text',
+    body: 'This is a comment',
+    author: 'reviewer',
+    date: '2026-03-03T14:30:00Z',
+    resolved: false,
+    ...overrides,
+  };
+}
+
+describe('generateNextCommentId', () => {
+  it('should return "comment-1" for empty markdown', () => {
+    expect(generateNextCommentId('')).toBe('comment-1');
+  });
+
+  it('should return "comment-2" when annotation 1 exists', () => {
+    const md = `Text[@1] here.
+
+`;
+    expect(generateNextCommentId(md)).toBe('comment-2');
+  });
+});
+
+describe('addComment', () => {
+  it('should add a [@N] marker and annotation block', () => {
+    const md = 'Some highlighted text in context.\n';
+    const comment = makeComment();
+    const result = addComment(md, comment);
+
+    expect(result).toContain('Some highlighted text[@1] in context.');
+    expect(result).toContain('`;
+    const result = removeComment(md, 'comment-1');
+
+    expect(result).not.toContain('[@1]');
+    expect(result).not.toContain('This is a comment');
+    expect(result).toContain('Some highlighted text in context.');
+  });
+});
+
+describe('updateComment', () => {
+  it('should replace the body while keeping other fields unchanged', () => {
+    const md = `Some highlighted text[@1] in context.
+
+`;
+    const result = updateComment(md, 'comment-1', 'Updated body text');
+
+    expect(result).toContain('"body": "Updated body text"');
+    expect(result).not.toContain('Original body text');
+  });
+});
+
+describe('resolveComment', () => {
+  it('should set resolved:true in annotation JSON', () => {
+    const md = `Some highlighted text[@1] in context.
+
+`;
+    const result = resolveComment(md, 'comment-1');
+
+    expect(result).toContain('"resolved": true');
+  });
+});
+
+describe('addCommentAtOffset', () => {
+  it('should insert marker after bold text using source map', () => {
+    const md = 'This is **important** for the review.\n';
+    const sourceMap = buildSourceMap(md);
+    const comment = makeComment({ selectedText: 'important' });
+    const result = addCommentAtOffset(md, comment, sourceMap);
+
+    expect(result).toContain('**important**[@1]');
+    expect(result).toContain('`;
+
+  it('should add a reply to annotation thread', () => {
+    const reply: Omit = {
+      author: 'bob',
+      body: 'Good catch',
+      date: '2026-03-04T10:00:00Z',
+    };
+    const { markdown, replyId } = addReply(v2Md, 'comment-1', reply);
+
+    expect(replyId).toBe('reply-1');
+    expect(markdown).toContain('"thread"');
+    expect(markdown).toContain('"author": "bob"');
+  });
+});
+
+describe('toggleReaction', () => {
+  const v2Md = `Some highlighted text[@1] in context.
+
+`;
+
+  it('should add a reaction when none exist', () => {
+    const result = toggleReaction(v2Md, 'comment-1', '\u{1F44D}', 'bob');
+
+    expect(result).toContain('"reactions"');
+    const parsed = parseAnnotations(result);
+    expect(parsed.comments[0].reactions).toBeDefined();
+    expect(parsed.comments[0].reactions!['\u{1F44D}']).toContain('bob');
+  });
+});
+
+describe('round-trip: serialize then parse', () => {
+  it('should round-trip a basic comment', () => {
+    const md = 'Some highlighted text in context.\n';
+    const comment = makeComment();
+    const serialized = addComment(md, comment);
+    const parsed = parseAnnotations(serialized);
+
+    expect(parsed.comments).toHaveLength(1);
+    expect(parsed.comments[0].id).toBe('comment-1');
+    expect(parsed.comments[0].selectedText).toBe('highlighted text');
+    expect(parsed.comments[0].body).toBe('This is a comment');
+  });
+});
diff --git a/packages/core/src/__tests__/comments/comment-context.test.ts b/packages/core/src/__tests__/comments/comment-context.test.ts
new file mode 100644
index 0000000..1882eee
--- /dev/null
+++ b/packages/core/src/__tests__/comments/comment-context.test.ts
@@ -0,0 +1,103 @@
+/**
+ * Tests for Comment Context
+ *
+ * Verifies that computeCommentContext correctly derives positional context
+ * (line number, section heading, breadcrumb) from a character offset in
+ * raw markdown content.
+ */
+
+import { describe, it, expect } from 'vitest';
+import { computeCommentContext } from '../../comments/comment-context';
+
+describe('computeCommentContext', () => {
+  it('should return line number and section for offset in a section', () => {
+    const md = [
+      '# Title',
+      '',
+      '## Installation',
+      '',
+      'Run npm install to get started.',
+    ].join('\n');
+
+    const offset = md.indexOf('npm');
+    const ctx = computeCommentContext(md, offset);
+
+    expect(ctx.line).toBe(5);
+    expect(ctx.section).toBe('Installation');
+    expect(ctx.sectionLevel).toBe(2);
+    expect(ctx.breadcrumb).toEqual(['Title', 'Installation']);
+  });
+
+  it('should handle offset before any heading (preamble)', () => {
+    const md = [
+      'Some preamble text here.',
+      '',
+      '# First Heading',
+      '',
+      'Content under heading.',
+    ].join('\n');
+
+    const offset = md.indexOf('preamble');
+    const ctx = computeCommentContext(md, offset);
+
+    expect(ctx.line).toBe(1);
+    expect(ctx.section).toBeUndefined();
+    expect(ctx.sectionLevel).toBeUndefined();
+    expect(ctx.breadcrumb).toEqual([]);
+  });
+
+  it('should build nested breadcrumb (h1 > h2 > h3)', () => {
+    const md = [
+      '# Getting Started',
+      '',
+      '## Installation',
+      '',
+      '### Prerequisites',
+      '',
+      'You need Node.js 18+.',
+    ].join('\n');
+
+    const offset = md.indexOf('Node.js');
+    const ctx = computeCommentContext(md, offset);
+
+    expect(ctx.line).toBe(7);
+    expect(ctx.section).toBe('Prerequisites');
+    expect(ctx.sectionLevel).toBe(3);
+    expect(ctx.breadcrumb).toEqual([
+      'Getting Started',
+      'Installation',
+      'Prerequisites',
+    ]);
+  });
+
+  it('should handle empty string', () => {
+    const ctx = computeCommentContext('', 0);
+
+    expect(ctx.line).toBe(1);
+    expect(ctx.breadcrumb).toEqual([]);
+  });
+
+  it('should reset breadcrumb correctly for peer sections', () => {
+    const md = [
+      '# Guide',
+      '',
+      '## Alpha',
+      '',
+      '### Alpha Sub',
+      '',
+      'Alpha sub content.',
+      '',
+      '## Beta',
+      '',
+      'Beta content here.',
+    ].join('\n');
+
+    const offset = md.indexOf('Beta content');
+    const ctx = computeCommentContext(md, offset);
+
+    expect(ctx.line).toBe(11);
+    expect(ctx.section).toBe('Beta');
+    expect(ctx.sectionLevel).toBe(2);
+    expect(ctx.breadcrumb).toEqual(['Guide', 'Beta']);
+  });
+});
diff --git a/packages/core/src/__tests__/comments/comment-parser.test.ts b/packages/core/src/__tests__/comments/comment-parser.test.ts
new file mode 100644
index 0000000..67fbc6a
--- /dev/null
+++ b/packages/core/src/__tests__/comments/comment-parser.test.ts
@@ -0,0 +1,107 @@
+/**
+ * Tests for comment parser - extracts structured comments from markdown footnotes
+ */
+
+import { describe, it, expect } from 'vitest';
+import { parseComments } from '../../comments/comment-parser';
+
+describe('parseComments', () => {
+  describe('No comments', () => {
+    it('should return unchanged markdown and empty array when no comments exist', () => {
+      const markdown = `# Hello World
+
+This is a paragraph.
+
+## Section Two
+
+More content here.`;
+
+      const result = parseComments(markdown);
+
+      expect(result.cleanedMarkdown).toBe(markdown);
+      expect(result.comments).toEqual([]);
+    });
+
+    it('should handle empty markdown', () => {
+      const result = parseComments('');
+
+      expect(result.cleanedMarkdown).toBe('');
+      expect(result.comments).toEqual([]);
+    });
+  });
+
+  describe('Single comment extraction', () => {
+    it('should extract a single comment with all fields', () => {
+      const markdown = `Some highlighted text[^comment-1] in context.
+
+
+[^comment-1]: 
+    This API endpoint needs error handling
+    for the 404 case.`;
+
+      const result = parseComments(markdown);
+
+      expect(result.comments).toHaveLength(1);
+      const comment = result.comments[0];
+      expect(comment.id).toBe('comment-1');
+      expect(comment.selectedText).toBe('text');
+      expect(comment.body).toBe('This API endpoint needs error handling\nfor the 404 case.');
+      expect(comment.author).toBe('reviewer');
+      expect(comment.date).toBe('2026-03-03T14:30:00Z');
+      expect(comment.resolved).toBe(false);
+    });
+
+    it('should remove comment reference from cleaned markdown', () => {
+      const markdown = `Some highlighted text[^comment-1] in context.
+
+
+[^comment-1]: 
+    This is a comment.`;
+
+      const result = parseComments(markdown);
+
+      expect(result.cleanedMarkdown).toBe('Some highlighted text in context.');
+      expect(result.cleanedMarkdown).not.toContain('[^comment-1]');
+      expect(result.cleanedMarkdown).not.toContain('mdview:comment');
+    });
+  });
+
+  describe('Multiple comments', () => {
+    it('should extract multiple comments', () => {
+      const markdown = `First text[^comment-1] and second text[^comment-2] in the doc.
+
+
+[^comment-1]: 
+    First comment body.
+[^comment-2]: 
+    Second comment body.`;
+
+      const result = parseComments(markdown);
+
+      expect(result.comments).toHaveLength(2);
+      expect(result.comments[0].id).toBe('comment-1');
+      expect(result.comments[0].author).toBe('alice');
+      expect(result.comments[0].body).toBe('First comment body.');
+      expect(result.comments[1].id).toBe('comment-2');
+      expect(result.comments[1].author).toBe('bob');
+      expect(result.comments[1].body).toBe('Second comment body.');
+    });
+  });
+
+  describe('Malformed metadata', () => {
+    it('should skip comments with invalid JSON metadata', () => {
+      const markdown = `Text[^comment-1] and more text[^comment-2] here.
+
+
+[^comment-1]: 
+    This should be skipped.
+[^comment-2]: 
+    This should be parsed.`;
+
+      const result = parseComments(markdown);
+
+      expect(result.comments).toHaveLength(1);
+      expect(result.comments[0].id).toBe('comment-2');
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/comments/comment-serializer.test.ts b/packages/core/src/__tests__/comments/comment-serializer.test.ts
new file mode 100644
index 0000000..3226acc
--- /dev/null
+++ b/packages/core/src/__tests__/comments/comment-serializer.test.ts
@@ -0,0 +1,106 @@
+/**
+ * Tests for Comment Serializer (v1 format)
+ *
+ * Verifies markdown footnote-based comment operations:
+ * generating IDs, adding, removing, updating, and resolving comments.
+ */
+
+import { describe, it, expect } from 'vitest';
+import {
+  generateNextCommentId,
+  addComment,
+  removeComment,
+  updateComment,
+  resolveComment,
+} from '../../comments/comment-serializer';
+import type { Comment } from '../../types/index';
+
+function makeComment(overrides: Partial = {}): Comment {
+  return {
+    id: 'comment-1',
+    selectedText: 'highlighted text',
+    body: 'This is a comment',
+    author: 'reviewer',
+    date: '2026-03-03T14:30:00Z',
+    resolved: false,
+    ...overrides,
+  };
+}
+
+describe('generateNextCommentId', () => {
+  it('should return "comment-1" for empty markdown', () => {
+    expect(generateNextCommentId('')).toBe('comment-1');
+  });
+
+  it('should return "comment-2" when comment-1 exists', () => {
+    const md = [
+      'Some highlighted text[^comment-1] in context.',
+      '',
+      '',
+      '[^comment-1]: ',
+      '    This is a comment',
+    ].join('\n');
+    expect(generateNextCommentId(md)).toBe('comment-2');
+  });
+});
+
+describe('addComment', () => {
+  it('should add a reference after selectedText and a footnote body at the end', () => {
+    const md = 'Some highlighted text in context.\n';
+    const comment = makeComment();
+    const result = addComment(md, comment);
+
+    expect(result).toContain('Some highlighted text[^comment-1] in context.');
+    expect(result).toContain('');
+    expect(result).toContain('[^comment-1]: ',
+      '[^comment-1]: ',
+      '    This is a comment',
+    ].join('\n');
+    const result = removeComment(md, 'comment-1');
+
+    expect(result).not.toContain('[^comment-1]');
+    expect(result).not.toContain('This is a comment');
+    expect(result).toContain('Some highlighted text in context.');
+  });
+});
+
+describe('updateComment', () => {
+  it('should replace the body text while keeping metadata unchanged', () => {
+    const md = [
+      'Some highlighted text[^comment-1] in context.',
+      '',
+      '',
+      '[^comment-1]: ',
+      '    Original body text',
+    ].join('\n');
+    const result = updateComment(md, 'comment-1', 'Updated body text');
+
+    expect(result).toContain('    Updated body text');
+    expect(result).not.toContain('Original body text');
+  });
+});
+
+describe('resolveComment', () => {
+  it('should add "resolved":true to metadata JSON', () => {
+    const md = [
+      'Some highlighted text[^comment-1] in context.',
+      '',
+      '',
+      '[^comment-1]: ',
+      '    This is a comment',
+    ].join('\n');
+    const result = resolveComment(md, 'comment-1');
+
+    expect(result).toContain('"resolved":true');
+  });
+});
diff --git a/packages/core/src/__tests__/comments/emoji-data.test.ts b/packages/core/src/__tests__/comments/emoji-data.test.ts
new file mode 100644
index 0000000..86ee996
--- /dev/null
+++ b/packages/core/src/__tests__/comments/emoji-data.test.ts
@@ -0,0 +1,61 @@
+/**
+ * Tests for emoji data module
+ */
+
+import { describe, it, expect } from 'vitest';
+import { QUICK_EMOJIS, EMOJI_CATEGORIES, searchEmojis } from '../../comments/emoji-data';
+
+describe('QUICK_EMOJIS', () => {
+  it('should have exactly 12 entries', () => {
+    expect(QUICK_EMOJIS).toHaveLength(12);
+  });
+
+  it('should include common reaction emojis', () => {
+    const chars = QUICK_EMOJIS.map((e) => e.char);
+    expect(chars).toContain('\u{1F44D}'); // thumbs up
+    expect(chars).toContain('\u{1F44E}'); // thumbs down
+    expect(chars).toContain('\u{2764}\u{FE0F}'); // red heart
+    expect(chars).toContain('\u{1F680}'); // rocket
+    expect(chars).toContain('\u{2705}'); // check mark
+    expect(chars).toContain('\u{274C}'); // cross mark
+  });
+});
+
+describe('EMOJI_CATEGORIES', () => {
+  it('should have exactly 8 categories', () => {
+    expect(EMOJI_CATEGORIES).toHaveLength(8);
+  });
+
+  it('should have name and emojis on each category', () => {
+    for (const cat of EMOJI_CATEGORIES) {
+      expect(cat.name).toBeTruthy();
+      expect(cat.emojis.length).toBeGreaterThan(0);
+    }
+  });
+});
+
+describe('searchEmojis', () => {
+  it('should find emojis by name', () => {
+    const results = searchEmojis('thumbs');
+    expect(results.length).toBeGreaterThan(0);
+    const chars = results.map((e) => e.char);
+    expect(chars).toContain('\u{1F44D}');
+  });
+
+  it('should find emojis by keyword', () => {
+    const results = searchEmojis('fire');
+    expect(results.length).toBeGreaterThan(0);
+    const chars = results.map((e) => e.char);
+    expect(chars).toContain('\u{1F525}');
+  });
+
+  it('should return empty array for no match', () => {
+    const results = searchEmojis('zzzznotanemoji');
+    expect(results).toEqual([]);
+  });
+
+  it('should return empty array for empty query', () => {
+    const results = searchEmojis('');
+    expect(results).toEqual([]);
+  });
+});
diff --git a/packages/core/src/__tests__/comments/source-position-map.test.ts b/packages/core/src/__tests__/comments/source-position-map.test.ts
new file mode 100644
index 0000000..512a955
--- /dev/null
+++ b/packages/core/src/__tests__/comments/source-position-map.test.ts
@@ -0,0 +1,107 @@
+/**
+ * Tests for Source Position Map
+ *
+ * Verifies the inline syntax stripping with offset tracking that enables
+ * accurate comment footnote reference insertion into formatted markdown.
+ */
+
+import { describe, it, expect } from 'vitest';
+import {
+  buildSourceMap,
+  findInsertionPoint,
+} from '../../comments/source-position-map';
+
+describe('buildSourceMap', () => {
+  it('should produce identity mapping for plain text', () => {
+    const map = buildSourceMap('Hello world');
+    expect(map.plainText).toBe('Hello world');
+    expect(map.offsets).toEqual([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+    expect(map.spans).toEqual([]);
+  });
+
+  it('should strip bold markers and track offsets', () => {
+    const map = buildSourceMap('**bold**');
+    expect(map.plainText).toBe('bold');
+    expect(map.offsets).toEqual([2, 3, 4, 5]);
+    expect(map.spans).toHaveLength(1);
+    expect(map.spans[0]).toMatchObject({
+      sourceStart: 0,
+      sourceEnd: 8,
+      plainStart: 0,
+      plainEnd: 4,
+      type: 'bold',
+    });
+  });
+
+  it('should strip link syntax keeping display text', () => {
+    const map = buildSourceMap('[click](https://example.com)');
+    expect(map.plainText).toBe('click');
+    expect(map.spans.some((s) => s.type === 'link')).toBe(true);
+  });
+
+  it('should stop at comment separator', () => {
+    const md = 'Content **here**\n\n\n[^comment-1]: stuff';
+    const map = buildSourceMap(md);
+    expect(map.plainText).toBe('Content here\n\n');
+    expect(map.rawSource).toBe('Content **here**\n\n');
+  });
+
+  it('should handle empty string', () => {
+    const map = buildSourceMap('');
+    expect(map.plainText).toBe('');
+    expect(map.offsets).toEqual([]);
+    expect(map.spans).toEqual([]);
+  });
+});
+
+describe('findInsertionPoint', () => {
+  it('should find insertion point for plain text', () => {
+    const map = buildSourceMap('Hello world');
+    const point = findInsertionPoint(map, 'world');
+    expect(point).toBe(11);
+  });
+
+  it('should find insertion point after bold text', () => {
+    const map = buildSourceMap('Hello **important** text');
+    const point = findInsertionPoint(map, 'important');
+    expect(point).toBe(19);
+  });
+
+  it('should find insertion point after link', () => {
+    const map = buildSourceMap('Click [here](https://example.com) for more');
+    const point = findInsertionPoint(map, 'here');
+    expect(point).toBe(33);
+  });
+
+  it('should return null for text not found', () => {
+    const map = buildSourceMap('Hello world');
+    const point = findInsertionPoint(map, 'missing');
+    expect(point).toBeNull();
+  });
+
+  it('should return null for empty selectedText', () => {
+    const map = buildSourceMap('Hello world');
+    const point = findInsertionPoint(map, '');
+    expect(point).toBeNull();
+  });
+
+  it('should disambiguate using prefix context', () => {
+    const map = buildSourceMap('The word test and another test here');
+    const point = findInsertionPoint(map, 'test', {
+      prefix: 'another ',
+      suffix: ' here',
+    });
+    expect(point).toBe(30);
+  });
+});
+
+describe('source map insertion integration', () => {
+  it('should allow correct footnote insertion after bold text', () => {
+    const md = 'This is **important** for the review.';
+    const map = buildSourceMap(md);
+    const point = findInsertionPoint(map, 'important');
+    expect(point).not.toBeNull();
+    const result = md.slice(0, point!) + '[^comment-1]' + md.slice(point!);
+    expect(result).toBe('This is **important**[^comment-1] for the review.');
+  });
+});
diff --git a/packages/core/src/__tests__/converter.test.ts b/packages/core/src/__tests__/converter.test.ts
new file mode 100644
index 0000000..a602827
--- /dev/null
+++ b/packages/core/src/__tests__/converter.test.ts
@@ -0,0 +1,232 @@
+import { MarkdownConverter } from '../markdown-converter';
+import { extractFrontmatter, renderFrontmatterHtml } from '../frontmatter-extractor';
+import { CacheManager } from '../cache-manager';
+
+describe('MarkdownConverter', () => {
+  let converter: MarkdownConverter;
+
+  beforeEach(() => {
+    converter = new MarkdownConverter();
+  });
+
+  it('should convert basic markdown to HTML', () => {
+    const result = converter.convert('# Hello World');
+    expect(result.html).toContain(' {
+    const result = converter.convert('# Title\n\n## Subtitle');
+    expect(result.metadata.headings).toHaveLength(2);
+    expect(result.metadata.headings[0].level).toBe(1);
+    // The anchor plugin wraps heading content in text,
+    // making the inline token's content empty. The heading ID is still generated.
+    expect(result.metadata.headings[0].id).toBe('');
+    expect(result.metadata.headings[1].level).toBe(2);
+  });
+
+  it('should count words', () => {
+    const result = converter.convert('one two three four five');
+    expect(result.metadata.wordCount).toBe(5);
+  });
+
+  it('should detect code blocks', () => {
+    const result = converter.convert('```javascript\nconsole.log("hi");\n```');
+    expect(result.metadata.codeBlocks).toHaveLength(1);
+    expect(result.metadata.codeBlocks[0].language).toBe('javascript');
+  });
+
+  it('should detect mermaid blocks', () => {
+    const result = converter.convert('```mermaid\ngraph TD\n  A --> B\n```');
+    expect(result.metadata.mermaidBlocks).toHaveLength(1);
+    expect(result.metadata.mermaidBlocks[0].code).toContain('graph TD');
+    expect(result.html).toContain('mermaid-container');
+  });
+
+  it('should extract link metadata', () => {
+    const result = converter.convert('[Example](https://example.com)');
+    expect(result.metadata.links).toHaveLength(1);
+    expect(result.metadata.links[0].href).toBe('https://example.com');
+  });
+
+  it('should extract image metadata', () => {
+    const result = converter.convert('![alt text](image.png "title")');
+    expect(result.metadata.images).toHaveLength(1);
+    expect(result.metadata.images[0].src).toBe('image.png');
+    expect(result.metadata.images[0].alt).toBe('alt text');
+  });
+
+  it('should render task lists', () => {
+    const result = converter.convert('- [x] Done\n- [ ] Todo');
+    expect(result.html).toContain('type="checkbox"');
+  });
+
+  it('should validate valid markdown', () => {
+    const result = converter.validateSyntax('# Valid markdown');
+    expect(result.valid).toBe(true);
+    expect(result.errors).toHaveLength(0);
+  });
+
+  it('should handle empty input', () => {
+    const result = converter.convert('');
+    expect(result.html).toBeDefined();
+    expect(result.errors).toHaveLength(0);
+  });
+});
+
+describe('extractFrontmatter', () => {
+  it('should extract frontmatter from markdown', () => {
+    const markdown = '---\ntitle: Hello\nauthor: Test\n---\n# Content';
+    const result = extractFrontmatter(markdown);
+    expect(result.frontmatter).not.toBeNull();
+    expect(result.frontmatter!.title).toBe('Hello');
+    expect(result.frontmatter!.author).toBe('Test');
+    expect(result.cleanedMarkdown).toBe('# Content');
+  });
+
+  it('should return null frontmatter when none present', () => {
+    const result = extractFrontmatter('# No frontmatter');
+    expect(result.frontmatter).toBeNull();
+    expect(result.cleanedMarkdown).toBe('# No frontmatter');
+  });
+
+  it('should handle empty input', () => {
+    const result = extractFrontmatter('');
+    expect(result.frontmatter).toBeNull();
+    expect(result.cleanedMarkdown).toBe('');
+  });
+
+  it('should strip surrounding quotes from values', () => {
+    const markdown = '---\ntitle: "Quoted Title"\n---\n';
+    const result = extractFrontmatter(markdown);
+    expect(result.frontmatter!.title).toBe('Quoted Title');
+  });
+});
+
+describe('renderFrontmatterHtml', () => {
+  it('should render frontmatter as details/table HTML', () => {
+    const html = renderFrontmatterHtml({ title: 'Test', author: 'Author' });
+    expect(html).toContain(' {
+  let cache: CacheManager;
+
+  beforeEach(() => {
+    cache = new CacheManager({ maxSize: 3 });
+  });
+
+  it('should return null for missing keys', () => {
+    expect(cache.get('nonexistent')).toBeNull();
+  });
+
+  it('should store and retrieve cache entries', () => {
+    const result = {
+      html: '
test
',
+      metadata: {
+        wordCount: 1,
+        headings: [],
+        codeBlocks: [],
+        mermaidBlocks: [],
+        images: [],
+        links: [],
+        frontmatter: null,
+      },
+      highlightedBlocks: new Map(),
+      mermaidSVGs: new Map(),
+      timestamp: Date.now(),
+      cacheKey: 'test-key',
+    };
+
+    cache.set('test-key', result, '/test.md', 'hash123', 'github-light');
+    const retrieved = cache.get('test-key');
+    expect(retrieved).not.toBeNull();
+    expect(retrieved!.html).toBe('
test
');
+  });
+
+  it('should evict oldest entry when maxSize is reached', () => {
+    const makeResult = (key: string) => ({
+      html: `
${key}
`,
+      metadata: {
+        wordCount: 1,
+        headings: [],
+        codeBlocks: [],
+        mermaidBlocks: [],
+        images: [],
+        links: [],
+        frontmatter: null,
+      },
+      highlightedBlocks: new Map(),
+      mermaidSVGs: new Map(),
+      timestamp: Date.now(),
+      cacheKey: key,
+    });
+
+    cache.set('key1', makeResult('key1'), '/a.md', 'h1', 'github-light');
+    cache.set('key2', makeResult('key2'), '/b.md', 'h2', 'github-light');
+    cache.set('key3', makeResult('key3'), '/c.md', 'h3', 'github-light');
+    // This should evict key1 (oldest)
+    cache.set('key4', makeResult('key4'), '/d.md', 'h4', 'github-light');
+
+    expect(cache.get('key1')).toBeNull();
+    expect(cache.get('key4')).not.toBeNull();
+  });
+
+  it('should invalidate by path', () => {
+    const result = {
+      html: '
test
',
+      metadata: {
+        wordCount: 1,
+        headings: [],
+        codeBlocks: [],
+        mermaidBlocks: [],
+        images: [],
+        links: [],
+        frontmatter: null,
+      },
+      highlightedBlocks: new Map(),
+      mermaidSVGs: new Map(),
+      timestamp: Date.now(),
+      cacheKey: 'k',
+    };
+
+    cache.set('k', result, '/file.md', 'hash', 'github-light');
+    cache.invalidateByPath('/file.md');
+    expect(cache.get('k')).toBeNull();
+  });
+
+  it('should clear all entries', () => {
+    const result = {
+      html: '
test
',
+      metadata: {
+        wordCount: 1,
+        headings: [],
+        codeBlocks: [],
+        mermaidBlocks: [],
+        images: [],
+        links: [],
+        frontmatter: null,
+      },
+      highlightedBlocks: new Map(),
+      mermaidSVGs: new Map(),
+      timestamp: Date.now(),
+      cacheKey: 'k',
+    };
+
+    cache.set('k', result, '/file.md', 'hash', 'github-light');
+    cache.clear();
+    expect(cache.getStats().size).toBe(0);
+  });
+
+  it('should report stats', () => {
+    const stats = cache.getStats();
+    expect(stats.size).toBe(0);
+    expect(stats.maxSize).toBe(3);
+    expect(stats.oldestEntry).toBeNull();
+  });
+});
diff --git a/packages/core/src/__tests__/debug-logger.test.ts b/packages/core/src/__tests__/debug-logger.test.ts
new file mode 100644
index 0000000..77d5caa
--- /dev/null
+++ b/packages/core/src/__tests__/debug-logger.test.ts
@@ -0,0 +1,254 @@
+import type { StorageAdapter } from '../adapters';
+import { DebugLogger, createDebugLogger, createDebug } from '../utils/debug-logger';
+
+describe('DebugLogger', () => {
+  describe('works with mock StorageAdapter that returns preferences', () => {
+    it('loads log level from storage adapter', async () => {
+      const mockAdapter: StorageAdapter = {
+        async getSync(_keys: string | string[]) {
+          return {
+            preferences: { logLevel: 'debug' },
+          };
+        },
+        async setSync() {},
+        async getLocal() {
+          return {};
+        },
+        async setLocal() {},
+      };
+
+      const logger = new DebugLogger(mockAdapter);
+      // Wait for async init to complete
+      await logger.ready;
+
+      expect(logger.getLogLevel()).toBe('debug');
+    });
+
+    it('respects legacy debug boolean from storage', async () => {
+      const mockAdapter: StorageAdapter = {
+        async getSync(_keys: string | string[]) {
+          return {
+            preferences: { debug: true },
+          };
+        },
+        async setSync() {},
+        async getLocal() {
+          return {};
+        },
+        async setLocal() {},
+      };
+
+      const logger = new DebugLogger(mockAdapter);
+      await logger.ready;
+
+      expect(logger.getLogLevel()).toBe('debug');
+    });
+
+    it('defaults to error when storage has preferences without logLevel or debug', async () => {
+      const mockAdapter: StorageAdapter = {
+        async getSync(_keys: string | string[]) {
+          return {
+            preferences: { theme: 'github-light' },
+          };
+        },
+        async setSync() {},
+        async getLocal() {
+          return {};
+        },
+        async setLocal() {},
+      };
+
+      const logger = new DebugLogger(mockAdapter);
+      await logger.ready;
+
+      expect(logger.getLogLevel()).toBe('error');
+    });
+
+    it('defaults to error when storage adapter rejects', async () => {
+      const mockAdapter: StorageAdapter = {
+        async getSync() {
+          throw new Error('storage unavailable');
+        },
+        async setSync() {},
+        async getLocal() {
+          return {};
+        },
+        async setLocal() {},
+      };
+
+      const logger = new DebugLogger(mockAdapter);
+      await logger.ready;
+
+      expect(logger.getLogLevel()).toBe('error');
+    });
+  });
+
+  describe('works without any adapter (graceful degradation)', () => {
+    it('defaults to error log level without adapter', () => {
+      const logger = new DebugLogger();
+      expect(logger.getLogLevel()).toBe('error');
+    });
+
+    it('allows setting log level manually', () => {
+      const logger = new DebugLogger();
+      logger.setLogLevel('info');
+      expect(logger.getLogLevel()).toBe('info');
+    });
+  });
+
+  describe('log level filtering works correctly', () => {
+    let consoleSpy: {
+      log: ReturnType;
+      debug: ReturnType;
+      info: ReturnType;
+      warn: ReturnType;
+      error: ReturnType;
+    };
+
+    beforeEach(() => {
+      consoleSpy = {
+        log: vi.spyOn(console, 'log').mockImplementation(() => {}),
+        debug: vi.spyOn(console, 'debug').mockImplementation(() => {}),
+        info: vi.spyOn(console, 'info').mockImplementation(() => {}),
+        warn: vi.spyOn(console, 'warn').mockImplementation(() => {}),
+        error: vi.spyOn(console, 'error').mockImplementation(() => {}),
+      };
+    });
+
+    afterEach(() => {
+      vi.restoreAllMocks();
+    });
+
+    it('at level none, suppresses all output', () => {
+      const logger = new DebugLogger();
+      logger.setLogLevel('none');
+
+      logger.error('ctx', 'msg');
+      logger.warn('ctx', 'msg');
+      logger.info('ctx', 'msg');
+      logger.debug('ctx', 'msg');
+      logger.log('ctx', 'msg');
+
+      expect(consoleSpy.error).not.toHaveBeenCalled();
+      expect(consoleSpy.warn).not.toHaveBeenCalled();
+      expect(consoleSpy.info).not.toHaveBeenCalled();
+      expect(consoleSpy.debug).not.toHaveBeenCalled();
+      expect(consoleSpy.log).not.toHaveBeenCalled();
+    });
+
+    it('at level error, only shows errors', () => {
+      const logger = new DebugLogger();
+      logger.setLogLevel('error');
+
+      logger.error('ctx', 'err msg');
+      logger.warn('ctx', 'warn msg');
+      logger.info('ctx', 'info msg');
+      logger.log('ctx', 'log msg');
+
+      expect(consoleSpy.error).toHaveBeenCalledWith('[ctx]', 'err msg');
+      expect(consoleSpy.warn).not.toHaveBeenCalled();
+      expect(consoleSpy.info).not.toHaveBeenCalled();
+      expect(consoleSpy.log).not.toHaveBeenCalled();
+    });
+
+    it('at level warn, shows errors and warnings', () => {
+      const logger = new DebugLogger();
+      logger.setLogLevel('warn');
+
+      logger.error('ctx', 'err msg');
+      logger.warn('ctx', 'warn msg');
+      logger.info('ctx', 'info msg');
+      logger.log('ctx', 'log msg');
+
+      expect(consoleSpy.error).toHaveBeenCalled();
+      expect(consoleSpy.warn).toHaveBeenCalledWith('[ctx]', 'warn msg');
+      expect(consoleSpy.info).not.toHaveBeenCalled();
+      expect(consoleSpy.log).not.toHaveBeenCalled();
+    });
+
+    it('at level info, shows errors, warnings, and info', () => {
+      const logger = new DebugLogger();
+      logger.setLogLevel('info');
+
+      logger.error('ctx', 'err');
+      logger.warn('ctx', 'warn');
+      logger.info('ctx', 'info');
+      logger.log('ctx', 'log');
+
+      expect(consoleSpy.error).toHaveBeenCalled();
+      expect(consoleSpy.warn).toHaveBeenCalled();
+      expect(consoleSpy.info).toHaveBeenCalledWith('[ctx]', 'info');
+      expect(consoleSpy.log).not.toHaveBeenCalled();
+    });
+
+    it('at level debug, shows everything', () => {
+      const logger = new DebugLogger();
+      logger.setLogLevel('debug');
+
+      logger.error('ctx', 'err');
+      logger.warn('ctx', 'warn');
+      logger.info('ctx', 'info');
+      logger.debug('ctx', 'dbg');
+      logger.log('ctx', 'log');
+
+      expect(consoleSpy.error).toHaveBeenCalled();
+      expect(consoleSpy.warn).toHaveBeenCalled();
+      expect(consoleSpy.info).toHaveBeenCalled();
+      expect(consoleSpy.debug).toHaveBeenCalledWith('[ctx]', 'dbg');
+      expect(consoleSpy.log).toHaveBeenCalledWith('[ctx]', 'log');
+    });
+  });
+
+  describe('factory functions', () => {
+    it('createDebugLogger returns a DebugLogger instance', () => {
+      const logger = createDebugLogger();
+      expect(logger).toBeInstanceOf(DebugLogger);
+    });
+
+    it('createDebugLogger accepts an optional adapter', async () => {
+      const mockAdapter: StorageAdapter = {
+        async getSync() {
+          return { preferences: { logLevel: 'warn' as const } };
+        },
+        async setSync() {},
+        async getLocal() {
+          return {};
+        },
+        async setLocal() {},
+      };
+
+      const logger = createDebugLogger(mockAdapter);
+      await logger.ready;
+      expect(logger.getLogLevel()).toBe('warn');
+    });
+
+    it('createDebug returns convenience object with all methods', () => {
+      const d = createDebug();
+      expect(typeof d.log).toBe('function');
+      expect(typeof d.debug).toBe('function');
+      expect(typeof d.info).toBe('function');
+      expect(typeof d.warn).toBe('function');
+      expect(typeof d.error).toBe('function');
+      expect(typeof d.group).toBe('function');
+      expect(typeof d.groupEnd).toBe('function');
+      expect(typeof d.table).toBe('function');
+      expect(typeof d.time).toBe('function');
+      expect(typeof d.timeEnd).toBe('function');
+      expect(typeof d.setLogLevel).toBe('function');
+      expect(typeof d.getLogLevel).toBe('function');
+      expect(typeof d.setDebugMode).toBe('function');
+      expect(typeof d.isDebugEnabled).toBe('function');
+    });
+
+    it('createDebug convenience methods delegate to logger', () => {
+      const d = createDebug();
+      d.setLogLevel('debug');
+      expect(d.getLogLevel()).toBe('debug');
+      expect(d.isDebugEnabled()).toBe(true);
+
+      d.setDebugMode(false);
+      expect(d.getLogLevel()).toBe('error');
+      expect(d.isDebugEnabled()).toBe(false);
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/export-ui.test.ts b/packages/core/src/__tests__/export-ui.test.ts
new file mode 100644
index 0000000..1c2884a
--- /dev/null
+++ b/packages/core/src/__tests__/export-ui.test.ts
@@ -0,0 +1,218 @@
+/**
+ * Tests for core ExportUI with MessagingAdapter
+ */
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import type { MessagingAdapter, IPCMessage } from '../adapters';
+import { NoopMessagingAdapter } from '../adapters';
+
+// We need to mock the DOM for ExportUI
+function setupDOM(): void {
+  document.body.innerHTML = '';
+}
+
+describe('ExportUI (core)', () => {
+  beforeEach(() => {
+    setupDOM();
+  });
+
+  afterEach(() => {
+    document.body.innerHTML = '';
+  });
+
+  describe('constructor with MessagingAdapter', () => {
+    it('accepts an optional MessagingAdapter and loads preferences via it', async () => {
+      const mockMessaging: MessagingAdapter = {
+        send: vi.fn().mockResolvedValue({
+          state: {
+            preferences: {
+              exportDefaultPageSize: 'Letter',
+              exportDefaultFormat: 'pdf',
+              exportIncludeToc: false,
+              exportFilenameTemplate: '{title}-{date}',
+            },
+          },
+        }),
+      };
+
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI({ messaging: mockMessaging });
+
+      // Give loadPreferences time to run (it's async in constructor)
+      await vi.waitFor(() => {
+        expect(mockMessaging.send).toHaveBeenCalledWith({ type: 'GET_STATE' });
+      });
+
+      // Verify the adapter was called with the right message
+      expect(mockMessaging.send).toHaveBeenCalledTimes(1);
+
+      ui.destroy();
+    });
+
+    it('applies loaded preferences to options', async () => {
+      const mockMessaging: MessagingAdapter = {
+        send: vi.fn().mockResolvedValue({
+          state: {
+            preferences: {
+              exportDefaultPageSize: 'Letter',
+              exportDefaultFormat: 'pdf',
+            },
+          },
+        }),
+      };
+
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI({ messaging: mockMessaging });
+
+      // Wait for preferences to load
+      await vi.waitFor(() => {
+        expect(mockMessaging.send).toHaveBeenCalled();
+      });
+
+      // The ExportUI should have updated its internal options
+      // We can verify by creating the button and checking it works
+      const button = ui.createExportButton();
+      expect(button).toBeTruthy();
+      expect(button.className).toContain('mdview-export-btn');
+
+      ui.destroy();
+    });
+  });
+
+  describe('graceful degradation without adapter', () => {
+    it('creates ExportUI without a messaging adapter', async () => {
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI();
+
+      // Should not throw
+      expect(ui).toBeTruthy();
+
+      const button = ui.createExportButton();
+      expect(button).toBeTruthy();
+      expect(button.className).toContain('mdview-export-btn');
+
+      ui.destroy();
+    });
+
+    it('works with NoopMessagingAdapter', async () => {
+      const noopMessaging = new NoopMessagingAdapter();
+      const sendSpy = vi.spyOn(noopMessaging, 'send');
+
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI({ messaging: noopMessaging });
+
+      // Wait for the async loadPreferences to complete
+      await vi.waitFor(() => {
+        expect(sendSpy).toHaveBeenCalled();
+      });
+
+      // NoopMessagingAdapter returns {} which has no state.preferences
+      // So options should remain at defaults
+      const button = ui.createExportButton();
+      expect(button).toBeTruthy();
+
+      ui.destroy();
+    });
+
+    it('handles messaging adapter that rejects', async () => {
+      const failingMessaging: MessagingAdapter = {
+        send: vi.fn().mockRejectedValue(new Error('Connection failed')),
+      };
+
+      const { ExportUI } = await import('../ui/export-ui');
+      // Should not throw even if messaging fails
+      const ui = new ExportUI({ messaging: failingMessaging });
+
+      await vi.waitFor(() => {
+        expect(failingMessaging.send).toHaveBeenCalled();
+      });
+
+      // Should still work - graceful degradation
+      const button = ui.createExportButton();
+      expect(button).toBeTruthy();
+
+      ui.destroy();
+    });
+
+    it('handles messaging adapter that returns empty response', async () => {
+      const emptyMessaging: MessagingAdapter = {
+        send: vi.fn().mockResolvedValue(null),
+      };
+
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI({ messaging: emptyMessaging });
+
+      await vi.waitFor(() => {
+        expect(emptyMessaging.send).toHaveBeenCalled();
+      });
+
+      // Should work fine with null response
+      const button = ui.createExportButton();
+      expect(button).toBeTruthy();
+
+      ui.destroy();
+    });
+  });
+
+  describe('UI functionality', () => {
+    it('creates export button with correct attributes', async () => {
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI();
+
+      const button = ui.createExportButton();
+
+      expect(button.getAttribute('aria-label')).toBe('Export document');
+      expect(button.getAttribute('aria-haspopup')).toBe('menu');
+      expect(button.getAttribute('aria-expanded')).toBe('false');
+
+      ui.destroy();
+    });
+
+    it('toggles menu visibility', async () => {
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI();
+      ui.createExportButton();
+
+      // Show menu
+      ui.showMenu();
+      // There should be a menu in the DOM
+      const menu = document.querySelector('.mdview-export-menu');
+      expect(menu).toBeTruthy();
+
+      // Hide menu
+      ui.hideMenu();
+
+      ui.destroy();
+    });
+
+    it('destroys cleanly', async () => {
+      const { ExportUI } = await import('../ui/export-ui');
+      const ui = new ExportUI();
+      const button = ui.createExportButton();
+      document.body.appendChild(button);
+
+      ui.showMenu();
+
+      // Should not throw
+      ui.destroy();
+    });
+  });
+
+  describe('does NOT import chrome APIs', () => {
+    it('module source does not reference chrome.runtime', async () => {
+      // This is a static analysis check - import the module and verify
+      // it loaded without chrome global
+      const originalChrome = (globalThis as Record).chrome;
+      delete (globalThis as Record).chrome;
+
+      try {
+        // Re-import to ensure it works without chrome global
+        const mod = await import('../ui/export-ui');
+        expect(mod.ExportUI).toBeDefined();
+      } finally {
+        if (originalChrome !== undefined) {
+          (globalThis as Record).chrome = originalChrome;
+        }
+      }
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/file-scanner.test.ts b/packages/core/src/__tests__/file-scanner.test.ts
new file mode 100644
index 0000000..5427109
--- /dev/null
+++ b/packages/core/src/__tests__/file-scanner.test.ts
@@ -0,0 +1,380 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { FileScanner } from '../utils/file-scanner';
+import type { FileAdapter, FileChangeInfo } from '../adapters';
+import { NoopFileAdapter } from '../adapters';
+
+describe('FileScanner (core)', () => {
+  describe('hasMarkdownExtension', () => {
+    it('recognizes .md files', () => {
+      expect(FileScanner.hasMarkdownExtension('/path/to/file.md')).toBe(true);
+    });
+
+    it('recognizes .markdown files', () => {
+      expect(FileScanner.hasMarkdownExtension('/path/to/file.markdown')).toBe(true);
+    });
+
+    it('is case-insensitive', () => {
+      expect(FileScanner.hasMarkdownExtension('/path/to/FILE.MD')).toBe(true);
+      expect(FileScanner.hasMarkdownExtension('/path/to/README.Markdown')).toBe(true);
+    });
+
+    it('rejects non-markdown extensions', () => {
+      expect(FileScanner.hasMarkdownExtension('/path/to/file.txt')).toBe(false);
+      expect(FileScanner.hasMarkdownExtension('/path/to/file.html')).toBe(false);
+      expect(FileScanner.hasMarkdownExtension('/path/to/file.js')).toBe(false);
+    });
+  });
+
+  describe('matchesPattern (blocklist)', () => {
+    it('matches exact hostname', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('github.com', 'https://github.com/repo', 'github.com', '/repo')
+      ).toBe(true);
+    });
+
+    it('does not match different hostname', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('gitlab.com', 'https://github.com/repo', 'github.com', '/repo')
+      ).toBe(false);
+    });
+
+    it('matches wildcard subdomain', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('*.github.com', 'https://raw.github.com/file', 'raw.github.com', '/file')
+      ).toBe(true);
+    });
+
+    it('matches wildcard subdomain against base domain', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('*.github.com', 'https://github.com/file', 'github.com', '/file')
+      ).toBe(true);
+    });
+
+    it('matches path pattern', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('github.com/*/blob/*', 'https://github.com/user/blob/main', 'github.com', '/user/blob/main')
+      ).toBe(true);
+    });
+
+    it('matches full URL pattern', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('https://raw.githubusercontent.com/*', 'https://raw.githubusercontent.com/file.md', 'raw.githubusercontent.com', '/file.md')
+      ).toBe(true);
+    });
+
+    it('rejects empty pattern', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('', 'https://github.com', 'github.com', '/')
+      ).toBe(false);
+    });
+
+    it('rejects whitespace-only pattern', () => {
+      expect(
+        FileScanner.matchesBlocklistPattern('   ', 'https://github.com', 'github.com', '/')
+      ).toBe(false);
+    });
+  });
+
+  describe('isSiteBlockedFromList', () => {
+    it('returns false for empty blocklist', () => {
+      expect(FileScanner.isSiteBlockedFromList([], 'https://github.com', 'github.com', '/')).toBe(false);
+    });
+
+    it('returns true when URL matches a pattern', () => {
+      expect(
+        FileScanner.isSiteBlockedFromList(
+          ['github.com', '*.gitlab.com'],
+          'https://github.com/repo/file.md',
+          'github.com',
+          '/repo/file.md'
+        )
+      ).toBe(true);
+    });
+
+    it('returns false when URL does not match any pattern', () => {
+      expect(
+        FileScanner.isSiteBlockedFromList(
+          ['github.com', '*.gitlab.com'],
+          'https://example.com/file.md',
+          'example.com',
+          '/file.md'
+        )
+      ).toBe(false);
+    });
+  });
+
+  describe('generateHash', () => {
+    it('produces consistent hash for same content', async () => {
+      const hash1 = await FileScanner.generateHash('hello world');
+      const hash2 = await FileScanner.generateHash('hello world');
+      expect(hash1).toBe(hash2);
+    });
+
+    it('produces different hashes for different content', async () => {
+      // The global test setup mocks crypto.subtle.digest to always return
+      // zeroed ArrayBuffer(32). Override it to return content-dependent results.
+      let callCount = 0;
+      const originalDigest = crypto.subtle.digest;
+      crypto.subtle.digest = vi.fn(async () => {
+        callCount++;
+        const buf = new ArrayBuffer(32);
+        const view = new Uint8Array(buf);
+        view[0] = callCount; // Make each call return a unique hash
+        return buf;
+      });
+
+      try {
+        const hash1 = await FileScanner.generateHash('hello world');
+        const hash2 = await FileScanner.generateHash('goodbye world');
+        expect(hash1).not.toBe(hash2);
+      } finally {
+        crypto.subtle.digest = originalDigest;
+      }
+    });
+
+    it('returns a hex string', async () => {
+      const hash = await FileScanner.generateHash('test');
+      // The global mock returns zeroed ArrayBuffer(32), which yields 64 hex '0' chars
+      expect(hash).toMatch(/^[0-9a-f]+$/);
+      expect(hash).toHaveLength(64);
+    });
+  });
+
+  describe('validateFileSize', () => {
+    it('accepts content within size limit', () => {
+      expect(FileScanner.validateFileSize('small content')).toBe(true);
+    });
+
+    it('accepts content at exact limit', () => {
+      const content = 'x'.repeat(100);
+      expect(FileScanner.validateFileSize(content, 100)).toBe(true);
+    });
+
+    it('rejects content exceeding limit', () => {
+      const content = 'x'.repeat(200);
+      expect(FileScanner.validateFileSize(content, 100)).toBe(false);
+    });
+  });
+
+  describe('formatFileSize', () => {
+    it('formats bytes', () => {
+      expect(FileScanner.formatFileSize(500)).toBe('500 B');
+    });
+
+    it('formats kilobytes', () => {
+      expect(FileScanner.formatFileSize(2048)).toBe('2.0 KB');
+    });
+
+    it('formats megabytes', () => {
+      expect(FileScanner.formatFileSize(3 * 1024 * 1024)).toBe('3.0 MB');
+    });
+  });
+
+  describe('getFileSize', () => {
+    it('returns byte length of content', () => {
+      const size = FileScanner.getFileSize('abc');
+      expect(size).toBe(3);
+    });
+  });
+
+  describe('watchFile with FileAdapter', () => {
+    let mockAdapter: FileAdapter;
+
+    beforeEach(() => {
+      vi.useFakeTimers();
+    });
+
+    afterEach(() => {
+      vi.useRealTimers();
+    });
+
+    it('calls callback when file has changed', async () => {
+      mockAdapter = {
+        writeFile: vi.fn(),
+        readFile: vi.fn(),
+        checkChanged: vi.fn().mockResolvedValue({ changed: true, newHash: 'new-hash-123' } as FileChangeInfo),
+        watch: vi.fn().mockReturnValue(() => {}),
+      };
+
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        { fileAdapter: mockAdapter, interval: 1000 }
+      );
+
+      // Advance timer to trigger the check
+      await vi.advanceTimersByTimeAsync(1000);
+
+      expect(mockAdapter.checkChanged).toHaveBeenCalledWith('file:///test.md', 'initial-hash');
+      expect(callback).toHaveBeenCalledTimes(1);
+
+      cleanup();
+    });
+
+    it('does not call callback when file has not changed', async () => {
+      mockAdapter = {
+        writeFile: vi.fn(),
+        readFile: vi.fn(),
+        checkChanged: vi.fn().mockResolvedValue({ changed: false } as FileChangeInfo),
+        watch: vi.fn().mockReturnValue(() => {}),
+      };
+
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        { fileAdapter: mockAdapter, interval: 1000 }
+      );
+
+      await vi.advanceTimersByTimeAsync(1000);
+
+      expect(mockAdapter.checkChanged).toHaveBeenCalled();
+      expect(callback).not.toHaveBeenCalled();
+
+      cleanup();
+    });
+
+    it('updates lastHash after change is detected', async () => {
+      mockAdapter = {
+        writeFile: vi.fn(),
+        readFile: vi.fn(),
+        checkChanged: vi.fn()
+          .mockResolvedValueOnce({ changed: true, newHash: 'second-hash' } as FileChangeInfo)
+          .mockResolvedValueOnce({ changed: false } as FileChangeInfo),
+        watch: vi.fn().mockReturnValue(() => {}),
+      };
+
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'first-hash',
+        callback,
+        { fileAdapter: mockAdapter, interval: 1000 }
+      );
+
+      // First check — file changed
+      await vi.advanceTimersByTimeAsync(1000);
+      expect(mockAdapter.checkChanged).toHaveBeenCalledWith('file:///test.md', 'first-hash');
+
+      // Second check — should use the updated hash
+      await vi.advanceTimersByTimeAsync(1000);
+      expect(mockAdapter.checkChanged).toHaveBeenCalledWith('file:///test.md', 'second-hash');
+
+      cleanup();
+    });
+
+    it('handles adapter errors gracefully', async () => {
+      mockAdapter = {
+        writeFile: vi.fn(),
+        readFile: vi.fn(),
+        checkChanged: vi.fn().mockRejectedValue(new Error('Network error')),
+        watch: vi.fn().mockReturnValue(() => {}),
+      };
+
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        { fileAdapter: mockAdapter, interval: 1000 }
+      );
+
+      // Should not throw
+      await vi.advanceTimersByTimeAsync(1000);
+
+      expect(callback).not.toHaveBeenCalled();
+
+      cleanup();
+    });
+
+    it('handles adapter error response gracefully', async () => {
+      mockAdapter = {
+        writeFile: vi.fn(),
+        readFile: vi.fn(),
+        checkChanged: vi.fn().mockResolvedValue({ changed: false, error: 'File not found' } as FileChangeInfo),
+        watch: vi.fn().mockReturnValue(() => {}),
+      };
+
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        { fileAdapter: mockAdapter, interval: 1000 }
+      );
+
+      await vi.advanceTimersByTimeAsync(1000);
+
+      expect(callback).not.toHaveBeenCalled();
+
+      cleanup();
+    });
+
+    it('cleanup function stops polling', async () => {
+      mockAdapter = {
+        writeFile: vi.fn(),
+        readFile: vi.fn(),
+        checkChanged: vi.fn().mockResolvedValue({ changed: true, newHash: 'new' } as FileChangeInfo),
+        watch: vi.fn().mockReturnValue(() => {}),
+      };
+
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        { fileAdapter: mockAdapter, interval: 1000 }
+      );
+
+      // Stop before any tick
+      cleanup();
+
+      await vi.advanceTimersByTimeAsync(5000);
+
+      expect(mockAdapter.checkChanged).not.toHaveBeenCalled();
+      expect(callback).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('watchFile without adapter (graceful degradation)', () => {
+    beforeEach(() => {
+      vi.useFakeTimers();
+    });
+
+    afterEach(() => {
+      vi.useRealTimers();
+    });
+
+    it('returns a cleanup function without an adapter', () => {
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        {}
+      );
+
+      expect(typeof cleanup).toBe('function');
+      cleanup(); // should not throw
+    });
+
+    it('never calls callback without an adapter', async () => {
+      const callback = vi.fn();
+      const cleanup = FileScanner.watchFile(
+        'file:///test.md',
+        'initial-hash',
+        callback,
+        {}
+      );
+
+      await vi.advanceTimersByTimeAsync(5000);
+
+      expect(callback).not.toHaveBeenCalled();
+
+      cleanup();
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/render-pipeline.test.ts b/packages/core/src/__tests__/render-pipeline.test.ts
new file mode 100644
index 0000000..5adf752
--- /dev/null
+++ b/packages/core/src/__tests__/render-pipeline.test.ts
@@ -0,0 +1,294 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import type { MessagingAdapter, IPCMessage } from '../adapters';
+
+// Mock heavy dependencies that live outside @mdview/core
+vi.mock('../utils/dom-purifier', () => ({
+  domPurifier: {
+    sanitize: (html: string) => html,
+  },
+}));
+
+vi.mock('../workers/worker-pool', () => ({
+  workerPool: {
+    initialize: vi.fn().mockResolvedValue(undefined),
+    execute: vi.fn(),
+  },
+}));
+
+vi.mock('../renderers/syntax-highlighter', () => ({
+  syntaxHighlighter: {
+    highlightVisible: vi.fn(),
+  },
+}));
+
+vi.mock('../renderers/mermaid-renderer', () => ({
+  mermaidRenderer: {
+    renderAll: vi.fn().mockResolvedValue(undefined),
+  },
+}));
+
+vi.mock('../utils/toc-stripper', () => ({
+  stripTableOfContents: vi.fn((md: string) => ({ markdown: md, tocFound: false })),
+}));
+
+vi.mock('../comments/annotation-parser', () => ({
+  parseComments: vi.fn((md: string) => ({
+    cleanedMarkdown: md,
+    comments: [],
+  })),
+}));
+
+vi.mock('../utils/skeleton-renderer', () => ({
+  SkeletonRenderer: {
+    generateSkeleton: vi.fn(() => '
skeleton
'),
+    isHydrated: vi.fn(() => false),
+    markHydrated: vi.fn(),
+  },
+}));
+
+import { RenderPipeline } from '../render-pipeline';
+
+describe('RenderPipeline', () => {
+  let container: HTMLElement;
+
+  beforeEach(() => {
+    container = document.createElement('div');
+    vi.clearAllMocks();
+  });
+
+  describe('with MessagingAdapter', () => {
+    it('sends CACHE_GENERATE_KEY and CACHE_GET when useCache is true', async () => {
+      const sendMock = vi.fn().mockImplementation((msg: IPCMessage) => {
+        if (msg.type === 'CACHE_GENERATE_KEY') {
+          return Promise.resolve({ key: 'test-cache-key' });
+        }
+        if (msg.type === 'CACHE_GET') {
+          return Promise.resolve({ result: null });
+        }
+        if (msg.type === 'CACHE_SET') {
+          return Promise.resolve({});
+        }
+        return Promise.resolve({});
+      });
+      const mockMessaging: MessagingAdapter = { send: sendMock };
+
+      const pipeline = new RenderPipeline({ messaging: mockMessaging });
+
+      await pipeline.render({
+        container,
+        markdown: '# Hello',
+        filePath: '/test.md',
+        useCache: true,
+        useWorkers: false,
+      });
+
+      // Should have called CACHE_GENERATE_KEY
+      expect(sendMock).toHaveBeenCalledWith(
+        expect.objectContaining({ type: 'CACHE_GENERATE_KEY' })
+      );
+
+      // Should have called CACHE_GET
+      expect(sendMock).toHaveBeenCalledWith(expect.objectContaining({ type: 'CACHE_GET' }));
+    });
+
+    it('uses cached result when adapter returns a cache hit', async () => {
+      const cachedHtml = '
Cached content
';
+      const sendMock = vi.fn().mockImplementation((msg: IPCMessage) => {
+        if (msg.type === 'CACHE_GENERATE_KEY') {
+          return Promise.resolve({ key: 'cached-key' });
+        }
+        if (msg.type === 'CACHE_GET') {
+          return Promise.resolve({
+            result: {
+              html: cachedHtml,
+              metadata: {
+                headings: [],
+                codeBlocks: [],
+                mermaidBlocks: [],
+                images: [],
+                links: [],
+                wordCount: 0,
+                frontmatter: null,
+              },
+              highlightedBlocks: new Map(),
+              mermaidSVGs: new Map(),
+              timestamp: Date.now(),
+              cacheKey: 'cached-key',
+            },
+          });
+        }
+        return Promise.resolve({});
+      });
+      const mockMessaging: MessagingAdapter = { send: sendMock };
+
+      const pipeline = new RenderPipeline({ messaging: mockMessaging });
+
+      const progressUpdates: string[] = [];
+      pipeline.onProgress((p) => progressUpdates.push(p.stage));
+
+      await pipeline.render({
+        container,
+        markdown: '# Hello',
+        filePath: '/test.md',
+        useCache: true,
+        useWorkers: false,
+      });
+
+      expect(container.innerHTML).toBe(cachedHtml);
+      expect(progressUpdates).toContain('cached');
+    });
+
+    it('sends CACHE_SET after successful render', async () => {
+      const sendMock = vi.fn().mockImplementation((msg: IPCMessage) => {
+        if (msg.type === 'CACHE_GENERATE_KEY') {
+          return Promise.resolve({ key: 'new-cache-key' });
+        }
+        if (msg.type === 'CACHE_GET') {
+          return Promise.resolve({ result: null });
+        }
+        if (msg.type === 'CACHE_SET') {
+          return Promise.resolve({});
+        }
+        return Promise.resolve({});
+      });
+      const mockMessaging: MessagingAdapter = { send: sendMock };
+
+      const pipeline = new RenderPipeline({ messaging: mockMessaging });
+
+      await pipeline.render({
+        container,
+        markdown: '# Hello',
+        filePath: '/test.md',
+        useCache: true,
+        useWorkers: false,
+      });
+
+      expect(sendMock).toHaveBeenCalledWith(expect.objectContaining({ type: 'CACHE_SET' }));
+    });
+  });
+
+  describe('without MessagingAdapter (graceful degradation)', () => {
+    it('renders markdown without an adapter', async () => {
+      const pipeline = new RenderPipeline();
+
+      await pipeline.render({
+        container,
+        markdown: '# Hello World',
+        useCache: true,
+        filePath: '/test.md',
+        useWorkers: false,
+      });
+
+      // Should still render successfully (just skips caching)
+      expect(container.innerHTML).toBeTruthy();
+      expect(container.innerHTML).toContain('Hello World');
+    });
+
+    it('does not throw when useCache is true but no adapter', async () => {
+      const pipeline = new RenderPipeline();
+
+      await expect(
+        pipeline.render({
+          container,
+          markdown: '**Bold text**',
+          filePath: '/test.md',
+          useCache: true,
+          useWorkers: false,
+        })
+      ).resolves.not.toThrow();
+
+      expect(container.innerHTML).toContain('Bold text');
+    });
+
+    it('skips all caching operations without an adapter', async () => {
+      const pipeline = new RenderPipeline();
+
+      const progressUpdates: string[] = [];
+      pipeline.onProgress((p) => progressUpdates.push(p.stage));
+
+      await pipeline.render({
+        container,
+        markdown: '# Test',
+        filePath: '/test.md',
+        useCache: true,
+        useWorkers: false,
+      });
+
+      // Should NOT have a 'cached' stage (no adapter means no cache hit)
+      expect(progressUpdates).not.toContain('cached');
+      // Should still complete
+      expect(progressUpdates).toContain('complete');
+    });
+
+    it('renders without filePath and without adapter', async () => {
+      const pipeline = new RenderPipeline();
+
+      await pipeline.render({
+        container,
+        markdown: '# No file path',
+        useWorkers: false,
+      });
+
+      expect(container.innerHTML).toContain('No file path');
+    });
+  });
+
+  describe('core pipeline features', () => {
+    it('supports progress callbacks', async () => {
+      const pipeline = new RenderPipeline();
+      const stages: string[] = [];
+
+      pipeline.onProgress((p) => stages.push(p.stage));
+
+      await pipeline.render({
+        container,
+        markdown: '# Test',
+        useWorkers: false,
+        useCache: false,
+      });
+
+      expect(stages).toContain('parsing');
+      expect(stages).toContain('complete');
+    });
+
+    it('supports unsubscribing from progress', async () => {
+      const pipeline = new RenderPipeline();
+      const stages: string[] = [];
+
+      const unsub = pipeline.onProgress((p) => stages.push(p.stage));
+      unsub();
+
+      await pipeline.render({
+        container,
+        markdown: '# Test',
+        useWorkers: false,
+        useCache: false,
+      });
+
+      expect(stages).toHaveLength(0);
+    });
+
+    it('cancelRender stops the pipeline', async () => {
+      const pipeline = new RenderPipeline();
+
+      // Cancel immediately
+      pipeline.cancelRender();
+
+      await pipeline.render({
+        container,
+        markdown: '# Test',
+        useWorkers: false,
+        useCache: false,
+      });
+
+      // Container should be empty since render was cancelled at the start
+      // (after parsing, before sanitizing)
+      // The exact behavior depends on timing, but it should not throw
+    });
+
+    it('getLastCommentParseResult returns null before rendering', () => {
+      const pipeline = new RenderPipeline();
+      expect(pipeline.getLastCommentParseResult()).toBeNull();
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/smoke.test.ts b/packages/core/src/__tests__/smoke.test.ts
new file mode 100644
index 0000000..41f6435
--- /dev/null
+++ b/packages/core/src/__tests__/smoke.test.ts
@@ -0,0 +1,7 @@
+import { VERSION } from '../index';
+
+describe('@mdview/core', () => {
+  it('should export VERSION', () => {
+    expect(VERSION).toBe('0.0.1');
+  });
+});
diff --git a/packages/core/src/__tests__/theme-engine.test.ts b/packages/core/src/__tests__/theme-engine.test.ts
new file mode 100644
index 0000000..97afbb1
--- /dev/null
+++ b/packages/core/src/__tests__/theme-engine.test.ts
@@ -0,0 +1,179 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import type { Theme } from '../types/index';
+import type { StorageAdapter } from '../adapters';
+import { NoopStorageAdapter } from '../adapters';
+import githubLight from '../themes/github-light';
+import githubDark from '../themes/github-dark';
+
+// Import the class under test
+import { ThemeEngine } from '../theme-engine';
+
+describe('ThemeEngine', () => {
+  let engine: ThemeEngine;
+
+  beforeEach(() => {
+    engine = new ThemeEngine();
+  });
+
+  describe('loadTheme', () => {
+    it('loads a theme by name', async () => {
+      const theme = await engine.loadTheme('github-light');
+      expect(theme.name).toBe('github-light');
+      expect(theme.variant).toBe('light');
+    });
+
+    it('caches loaded themes', async () => {
+      const first = await engine.loadTheme('github-dark');
+      const second = await engine.loadTheme('github-dark');
+      expect(first).toBe(second); // same reference
+    });
+
+    it('falls back to github-light for unknown themes', async () => {
+      // 'test-theme' is listed in ThemeName type but has no module
+      const theme = await engine.loadTheme('test-theme');
+      expect(theme.name).toBe('github-light');
+    });
+  });
+
+  describe('compileToCSSVariables', () => {
+    it('compiles theme colors to CSS variables', () => {
+      const vars = engine.compileToCSSVariables(githubLight);
+      expect(vars['--md-bg']).toBe(githubLight.colors.background);
+      expect(vars['--md-fg']).toBe(githubLight.colors.foreground);
+      expect(vars['--md-primary']).toBe(githubLight.colors.primary);
+    });
+
+    it('compiles typography to CSS variables', () => {
+      const vars = engine.compileToCSSVariables(githubLight);
+      expect(vars['--md-font-family']).toBe(githubLight.typography.fontFamily);
+      expect(vars['--md-font-family-code']).toBe(githubLight.typography.codeFontFamily);
+      expect(vars['--md-line-height']).toBe(githubLight.typography.baseLineHeight.toString());
+    });
+
+    it('compiles spacing to CSS variables', () => {
+      const vars = engine.compileToCSSVariables(githubLight);
+      expect(vars['--md-block-margin']).toBe(githubLight.spacing.blockMargin);
+      expect(vars['--md-paragraph-margin']).toBe(githubLight.spacing.paragraphMargin);
+    });
+
+    it('applies typography overrides', () => {
+      const vars = engine.compileToCSSVariables(githubLight, {
+        fontFamily: 'Custom Sans',
+        codeFontFamily: 'Custom Mono',
+        baseLineHeight: 2.0,
+      });
+      expect(vars['--md-font-family']).toBe('Custom Sans');
+      expect(vars['--md-font-family-code']).toBe('Custom Mono');
+      expect(vars['--md-line-height']).toBe('2');
+    });
+  });
+
+  describe('with StorageAdapter', () => {
+    it('applies theme correctly with mock StorageAdapter providing overrides', async () => {
+      const storage = new NoopStorageAdapter();
+      await storage.setSync({
+        preferences: {
+          fontFamily: 'Inter',
+          codeFontFamily: 'Fira Code',
+          lineHeight: 1.8,
+          maxWidth: 1200,
+        },
+      });
+
+      const engineWithStorage = new ThemeEngine(storage);
+      const overrides = await engineWithStorage.getStorageOverrides();
+
+      expect(overrides.fontFamily).toBe('Inter');
+      expect(overrides.codeFontFamily).toBe('Fira Code');
+      expect(overrides.baseLineHeight).toBe(1.8);
+      expect(overrides.maxWidth).toBe(1200);
+    });
+
+    it('applies useMaxWidth override from storage', async () => {
+      const storage = new NoopStorageAdapter();
+      await storage.setSync({
+        preferences: {
+          useMaxWidth: true,
+        },
+      });
+
+      const engineWithStorage = new ThemeEngine(storage);
+      const overrides = await engineWithStorage.getStorageOverrides();
+
+      expect(overrides.useMaxWidth).toBe(true);
+    });
+  });
+
+  describe('without StorageAdapter (graceful degradation)', () => {
+    it('works without adapter — uses theme defaults only', () => {
+      const engineNoAdapter = new ThemeEngine();
+      const vars = engineNoAdapter.compileToCSSVariables(githubLight);
+
+      // Should use theme defaults, not any overrides
+      expect(vars['--md-font-family']).toBe(githubLight.typography.fontFamily);
+      expect(vars['--md-font-family-code']).toBe(githubLight.typography.codeFontFamily);
+      expect(vars['--md-line-height']).toBe(githubLight.typography.baseLineHeight.toString());
+    });
+
+    it('getStorageOverrides returns empty object without adapter', async () => {
+      const engineNoAdapter = new ThemeEngine();
+      const overrides = await engineNoAdapter.getStorageOverrides();
+
+      expect(overrides).toEqual({});
+    });
+  });
+
+  describe('font overrides from storage are applied', () => {
+    it('produces CSS variables with storage font overrides', async () => {
+      const storage = new NoopStorageAdapter();
+      await storage.setSync({
+        preferences: {
+          fontFamily: 'Georgia',
+          codeFontFamily: 'JetBrains Mono',
+          lineHeight: 1.6,
+        },
+      });
+
+      const engineWithStorage = new ThemeEngine(storage);
+      const overrides = await engineWithStorage.getStorageOverrides();
+      const vars = engineWithStorage.compileToCSSVariables(githubDark, overrides);
+
+      expect(vars['--md-font-family']).toBe('Georgia');
+      expect(vars['--md-font-family-code']).toBe('JetBrains Mono');
+      expect(vars['--md-line-height']).toBe('1.6');
+      // Non-overridden values should still come from theme
+      expect(vars['--md-bg']).toBe(githubDark.colors.background);
+    });
+  });
+
+  describe('getAvailableThemes', () => {
+    it('returns list of available themes', () => {
+      const themes = engine.getAvailableThemes();
+      expect(themes.length).toBe(8);
+      const names = themes.map((t) => t.name);
+      expect(names).toContain('github-light');
+      expect(names).toContain('github-dark');
+      expect(names).toContain('catppuccin-mocha');
+    });
+
+    it('each theme has name, displayName, and variant', () => {
+      const themes = engine.getAvailableThemes();
+      for (const t of themes) {
+        expect(t.name).toBeTruthy();
+        expect(t.displayName).toBeTruthy();
+        expect(['light', 'dark']).toContain(t.variant);
+      }
+    });
+  });
+
+  describe('getCurrentTheme', () => {
+    it('returns null before any theme is set', () => {
+      expect(engine.getCurrentTheme()).toBeNull();
+    });
+
+    it('returns the theme after setCurrentTheme', () => {
+      engine.setCurrentTheme(githubLight);
+      expect(engine.getCurrentTheme()).toBe(githubLight);
+    });
+  });
+});
diff --git a/packages/core/src/__tests__/themes.test.ts b/packages/core/src/__tests__/themes.test.ts
new file mode 100644
index 0000000..af105c8
--- /dev/null
+++ b/packages/core/src/__tests__/themes.test.ts
@@ -0,0 +1,60 @@
+import type { Theme } from '../types/index';
+
+import catppuccinFrappe from '../themes/catppuccin-frappe';
+import catppuccinLatte from '../themes/catppuccin-latte';
+import catppuccinMacchiato from '../themes/catppuccin-macchiato';
+import catppuccinMocha from '../themes/catppuccin-mocha';
+import githubDark from '../themes/github-dark';
+import githubLight from '../themes/github-light';
+import monokaiPro from '../themes/monokai-pro';
+import monokai from '../themes/monokai';
+
+const requiredFields: (keyof Theme)[] = [
+  'name',
+  'displayName',
+  'variant',
+  'colors',
+  'typography',
+  'spacing',
+  'syntaxTheme',
+  'mermaidTheme',
+];
+
+const themes: { label: string; theme: Theme }[] = [
+  { label: 'catppuccin-frappe', theme: catppuccinFrappe },
+  { label: 'catppuccin-latte', theme: catppuccinLatte },
+  { label: 'catppuccin-macchiato', theme: catppuccinMacchiato },
+  { label: 'catppuccin-mocha', theme: catppuccinMocha },
+  { label: 'github-dark', theme: githubDark },
+  { label: 'github-light', theme: githubLight },
+  { label: 'monokai-pro', theme: monokaiPro },
+  { label: 'monokai', theme: monokai },
+];
+
+describe('@mdview/core themes', () => {
+  it.each(themes)('$label has all required Theme fields', ({ theme }) => {
+    for (const field of requiredFields) {
+      expect(theme).toHaveProperty(field);
+      expect(theme[field]).toBeDefined();
+    }
+  });
+
+  it.each(themes)('$label has a valid variant', ({ theme }) => {
+    expect(['light', 'dark']).toContain(theme.variant);
+  });
+
+  it.each(themes)('$label has name matching its label', ({ label, theme }) => {
+    expect(theme.name).toBe(label);
+  });
+
+  it.each(themes)('$label has non-empty displayName', ({ theme }) => {
+    expect(theme.displayName.length).toBeGreaterThan(0);
+  });
+
+  it.each(themes)('$label has valid mermaidTheme', ({ theme }) => {
+    expect(theme.mermaidTheme).toHaveProperty('theme');
+    expect(theme.mermaidTheme).toHaveProperty('themeVariables');
+    expect(theme.mermaidTheme.themeVariables).toHaveProperty('primaryColor');
+    expect(theme.mermaidTheme.themeVariables).toHaveProperty('primaryTextColor');
+  });
+});
diff --git a/packages/core/src/__tests__/types.test.ts b/packages/core/src/__tests__/types.test.ts
new file mode 100644
index 0000000..907d131
--- /dev/null
+++ b/packages/core/src/__tests__/types.test.ts
@@ -0,0 +1,140 @@
+import type {
+  Theme,
+  ThemeName,
+  AppState,
+  ConversionResult,
+  Comment,
+  CommentParseResult,
+  ExportFormat,
+  PaperSize,
+  ContentNode,
+  CachedResult,
+  WorkerTask,
+} from '../types/index';
+
+describe('@mdview/core types', () => {
+  it('should allow creating a Theme object', () => {
+    const theme: Theme = {
+      name: 'github-light',
+      displayName: 'GitHub Light',
+      variant: 'light',
+      author: 'test',
+      version: '1.0.0',
+      colors: {
+        background: '#fff',
+        backgroundSecondary: '#f6f8fa',
+        backgroundTertiary: '#eee',
+        foreground: '#24292e',
+        foregroundSecondary: '#586069',
+        foregroundMuted: '#6a737d',
+        primary: '#0366d6',
+        secondary: '#6f42c1',
+        accent: '#e36209',
+        heading: '#24292e',
+        link: '#0366d6',
+        linkHover: '#0366d6',
+        linkVisited: '#6f42c1',
+        codeBackground: '#f6f8fa',
+        codeText: '#24292e',
+        codeKeyword: '#d73a49',
+        codeString: '#032f62',
+        codeComment: '#6a737d',
+        codeFunction: '#6f42c1',
+        border: '#e1e4e8',
+        borderLight: '#eaecef',
+        borderHeavy: '#d1d5da',
+        selection: '#0366d633',
+        highlight: '#fff3cd',
+        shadow: 'rgba(27,31,35,0.15)',
+        success: '#28a745',
+        warning: '#ffd33d',
+        error: '#d73a49',
+        info: '#0366d6',
+        commentHighlight: '#fff3cd',
+        commentHighlightResolved: '#dcffe4',
+        commentCardBg: '#ffffff',
+      },
+      typography: {
+        fontFamily: 'system-ui',
+        codeFontFamily: 'monospace',
+        baseFontSize: '16px',
+        baseLineHeight: 1.6,
+        h1Size: '2em',
+        h2Size: '1.5em',
+        h3Size: '1.25em',
+        h4Size: '1em',
+        h5Size: '0.875em',
+        h6Size: '0.85em',
+        fontWeightNormal: 400,
+        fontWeightBold: 600,
+        headingFontWeight: 600,
+      },
+      spacing: {
+        blockMargin: '16px',
+        paragraphMargin: '16px',
+        listItemMargin: '4px',
+        headingMargin: '24px',
+        codeBlockPadding: '16px',
+        tableCellPadding: '6px 13px',
+      },
+      syntaxTheme: 'github',
+      mermaidTheme: {
+        theme: 'default',
+        themeVariables: {
+          primaryColor: '#0366d6',
+          primaryTextColor: '#24292e',
+          primaryBorderColor: '#e1e4e8',
+          lineColor: '#586069',
+          secondaryColor: '#6f42c1',
+          tertiaryColor: '#e36209',
+          background: '#fff',
+          mainBkg: '#fff',
+        },
+      },
+    };
+    expect(theme.name).toBe('github-light');
+    expect(theme.variant).toBe('light');
+  });
+
+  it('should allow ThemeName literals', () => {
+    const names: ThemeName[] = [
+      'github-light',
+      'github-dark',
+      'catppuccin-latte',
+      'catppuccin-frappe',
+      'catppuccin-macchiato',
+      'catppuccin-mocha',
+      'monokai',
+      'monokai-pro',
+    ];
+    expect(names).toHaveLength(8);
+  });
+
+  it('should allow ExportFormat and PaperSize types', () => {
+    const format: ExportFormat = 'docx';
+    const size: PaperSize = 'A4';
+    expect(format).toBe('docx');
+    expect(size).toBe('A4');
+  });
+
+  it('should allow Comment type with all fields', () => {
+    const comment: Comment = {
+      id: 'comment-1',
+      selectedText: 'test',
+      body: 'a comment',
+      author: 'tester',
+      date: new Date().toISOString(),
+      resolved: false,
+      context: {
+        line: 1,
+        section: 'Introduction',
+        sectionLevel: 1,
+        breadcrumb: ['Introduction'],
+      },
+      tags: ['nit', 'suggestion'],
+      replies: [{ id: 'reply-1', author: 'reviewer', body: 'agreed', date: new Date().toISOString() }],
+      reactions: { '👍': ['tester'] },
+    };
+    expect(comment.id).toBe('comment-1');
+  });
+});
diff --git a/packages/core/src/__tests__/utils.test.ts b/packages/core/src/__tests__/utils.test.ts
new file mode 100644
index 0000000..75665b1
--- /dev/null
+++ b/packages/core/src/__tests__/utils.test.ts
@@ -0,0 +1,183 @@
+import {
+  splitIntoSections,
+  splitIntoChunks,
+  getInitialSections,
+  type MarkdownSection,
+} from '../utils/section-splitter';
+import { FilenameGenerator } from '../utils/filename-generator';
+import { stripTableOfContents } from '../utils/toc-stripper';
+
+describe('section-splitter', () => {
+  describe('splitIntoSections', () => {
+    it('should split markdown by headings', () => {
+      const md = '# Heading 1\nContent 1\n## Heading 2\nContent 2';
+      const sections = splitIntoSections(md);
+      expect(sections).toHaveLength(2);
+      expect(sections[0].heading).toBe('Heading 1');
+      expect(sections[1].heading).toBe('Heading 2');
+    });
+
+    it('should return a single section for markdown without headings', () => {
+      const md = 'Just some text\nwith multiple lines';
+      const sections = splitIntoSections(md);
+      expect(sections).toHaveLength(1);
+      expect(sections[0].heading).toBeUndefined();
+    });
+
+    it('should not split on headings inside code fences', () => {
+      const md = '# Real Heading\n```\n# Not a heading\n```\nMore content';
+      const sections = splitIntoSections(md);
+      expect(sections).toHaveLength(1);
+      expect(sections[0].heading).toBe('Real Heading');
+    });
+
+    it('should assign sequential section IDs', () => {
+      const md = '# A\ntext\n## B\ntext\n### C\ntext';
+      const sections = splitIntoSections(md);
+      expect(sections.map((s) => s.id)).toEqual(['section-0', 'section-1', 'section-2']);
+    });
+
+    it('should track line numbers', () => {
+      const md = '# First\nline 1\nline 2\n## Second\nline 3';
+      const sections = splitIntoSections(md);
+      expect(sections[0].startLine).toBe(0);
+      expect(sections[0].endLine).toBe(2);
+      expect(sections[1].startLine).toBe(3);
+      expect(sections[1].endLine).toBe(4);
+    });
+  });
+
+  describe('splitIntoChunks', () => {
+    it('should split large content into chunks', () => {
+      const line = 'x'.repeat(100) + '\n';
+      const md = line.repeat(100);
+      const sections = splitIntoChunks(md, 500);
+      expect(sections.length).toBeGreaterThan(1);
+      sections.forEach((s) => {
+        expect(s.id).toMatch(/^chunk-\d+$/);
+      });
+    });
+
+    it('should return single chunk for small content', () => {
+      const md = 'small text';
+      const sections = splitIntoChunks(md);
+      expect(sections).toHaveLength(1);
+    });
+  });
+
+  describe('getInitialSections', () => {
+    const makeSections = (count: number): MarkdownSection[] =>
+      Array.from({ length: count }, (_, i) => ({
+        markdown: `Section ${i}`,
+        startLine: i * 2,
+        endLine: i * 2 + 1,
+        heading: `Heading ${i}`,
+        level: 1,
+        id: `section-${i}`,
+      }));
+
+    it('should return up to maxSections sections', () => {
+      const sections = makeSections(10);
+      const initial = getInitialSections(sections, { maxSections: 2 });
+      expect(initial).toHaveLength(2);
+    });
+
+    it('should return at least one section even if maxSize is very small', () => {
+      const sections = makeSections(5);
+      const initial = getInitialSections(sections, { maxSize: 1 });
+      expect(initial).toHaveLength(1);
+    });
+
+    it('should return sections up to a specific ID', () => {
+      const sections = makeSections(5);
+      const initial = getInitialSections(sections, { upToSectionId: 'section-2' });
+      // Should include sections 0, 1, 2 plus one more for context
+      expect(initial).toHaveLength(4);
+    });
+  });
+});
+
+describe('filename-generator', () => {
+  it('should generate a filename with default template', () => {
+    const result = FilenameGenerator.generate({ title: 'My Document', extension: 'pdf' });
+    expect(result).toBe('my-document.pdf');
+  });
+
+  it('should sanitize illegal characters', () => {
+    const result = FilenameGenerator.generate({ title: 'file<>:"/\\|?*name', extension: 'txt' });
+    expect(result).toBe('filename.txt');
+  });
+
+  it('should handle empty title', () => {
+    const result = FilenameGenerator.generate({ title: '', extension: 'docx' });
+    expect(result).toBe('document.docx');
+  });
+
+  it('should use a custom template with date vars', () => {
+    const result = FilenameGenerator.generate({
+      title: 'Report',
+      extension: 'pdf',
+      template: '{title}-{year}',
+    });
+    const year = new Date().getFullYear();
+    expect(result).toBe(`report-${year}.pdf`);
+  });
+
+  it('should truncate overly long filenames', () => {
+    const longTitle = 'a'.repeat(300);
+    const result = FilenameGenerator.generate({ title: longTitle, extension: 'pdf' });
+    // 200 char max + '.pdf' = 204
+    expect(result.length).toBeLessThanOrEqual(204);
+  });
+});
+
+describe('toc-stripper', () => {
+  it('should return original markdown when no TOC is found', () => {
+    const md = '# Hello\nSome content';
+    const result = stripTableOfContents(md);
+    expect(result.tocFound).toBe(false);
+    expect(result.markdown).toBe(md);
+  });
+
+  it('should strip a TOC section with anchor links', () => {
+    const md = [
+      '# My Doc',
+      '',
+      '## Table of Contents',
+      '- [Section 1](#section-1)',
+      '- [Section 2](#section-2)',
+      '- [Section 3](#section-3)',
+      '',
+      '## Section 1',
+      'Content 1',
+    ].join('\n');
+    const result = stripTableOfContents(md);
+    expect(result.tocFound).toBe(true);
+    expect(result.markdown).not.toContain('Table of Contents');
+    expect(result.markdown).toContain('Section 1');
+    expect(result.markdown).toContain('Content 1');
+  });
+
+  it('should not strip a heading named Contents without anchor links', () => {
+    const md = [
+      '## Contents',
+      'This is just regular content, not a TOC.',
+      '',
+      '## Other',
+      'More content',
+    ].join('\n');
+    const result = stripTableOfContents(md);
+    expect(result.tocFound).toBe(false);
+  });
+
+  it('should accept an optional logger', () => {
+    const logs: string[] = [];
+    const logger = {
+      debug: (_ctx: string, msg: string) => logs.push(msg),
+      info: (_ctx: string, msg: string) => logs.push(msg),
+    };
+    const md = '# Doc\nNo TOC here';
+    stripTableOfContents(md, logger);
+    expect(logs.length).toBeGreaterThan(0);
+  });
+});
diff --git a/packages/core/src/adapters.ts b/packages/core/src/adapters.ts
new file mode 100644
index 0000000..5c1c40f
--- /dev/null
+++ b/packages/core/src/adapters.ts
@@ -0,0 +1,208 @@
+/**
+ * Platform adapter interfaces for @mdview/core.
+ *
+ * These abstractions replace direct Chrome extension API calls,
+ * allowing the core rendering engine to run in any environment
+ * (Chrome extension, Electron, Node.js, tests).
+ */
+
+import type { AppState, ThemeName, CachedResult } from './types/index';
+
+// ---------------------------------------------------------------------------
+// StorageAdapter — replaces chrome.storage.sync/local
+// ---------------------------------------------------------------------------
+
+export interface StorageAdapter {
+  /** Read values by key from persistent (synced) storage */
+  getSync(keys: string | string[]): Promise>;
+  /** Write values to persistent (synced) storage */
+  setSync(data: Record): Promise;
+  /** Read values by key from local-only storage */
+  getLocal(keys: string | string[]): Promise>;
+  /** Write values to local-only storage */
+  setLocal(data: Record): Promise;
+}
+
+// ---------------------------------------------------------------------------
+// MessagingAdapter — replaces chrome.runtime.sendMessage
+// ---------------------------------------------------------------------------
+
+/** Message envelope used for cross-context IPC */
+export interface IPCMessage {
+  type: string;
+  payload?: unknown;
+}
+
+export interface MessagingAdapter {
+  /** Send a message and await a response */
+  send(message: IPCMessage): Promise;
+}
+
+// ---------------------------------------------------------------------------
+// FileAdapter — replaces native host file I/O and file watching
+// ---------------------------------------------------------------------------
+
+export interface FileWriteResult {
+  success: boolean;
+  error?: string;
+}
+
+export interface FileChangeInfo {
+  changed: boolean;
+  newHash?: string;
+  error?: string;
+}
+
+export interface FileAdapter {
+  /** Write content to a file at the given path */
+  writeFile(path: string, content: string): Promise;
+  /** Read content from a file at the given path */
+  readFile(path: string): Promise;
+  /** Check if a file has changed since the last known hash */
+  checkChanged(url: string, lastHash: string): Promise;
+  /** Watch a file/directory for changes, returns an unsubscribe function */
+  watch(path: string, callback: () => void): () => void;
+}
+
+// ---------------------------------------------------------------------------
+// IdentityAdapter — replaces GET_USERNAME native host message
+// ---------------------------------------------------------------------------
+
+export interface IdentityAdapter {
+  /** Get the current user's display name or system username */
+  getUsername(): Promise;
+}
+
+// ---------------------------------------------------------------------------
+// ExportAdapter — replaces browser download / printToPDF
+// ---------------------------------------------------------------------------
+
+export interface ExportSaveOptions {
+  /** Suggested filename */
+  filename: string;
+  /** MIME type of the content */
+  mimeType: string;
+  /** File content as Blob or ArrayBuffer */
+  data: Blob | ArrayBuffer;
+}
+
+export interface ExportAdapter {
+  /** Save/download a file (browser download or native save dialog) */
+  saveFile(options: ExportSaveOptions): Promise;
+  /** Print the current view to PDF (Electron: webContents.printToPDF) */
+  printToPDF?(options?: {
+    pageSize?: string;
+    margins?: string;
+    landscape?: boolean;
+  }): Promise;
+}
+
+// ---------------------------------------------------------------------------
+// PlatformAdapters — combined context for dependency injection
+// ---------------------------------------------------------------------------
+
+export interface PlatformAdapters {
+  storage: StorageAdapter;
+  messaging: MessagingAdapter;
+  file: FileAdapter;
+  identity: IdentityAdapter;
+  export: ExportAdapter;
+}
+
+// ---------------------------------------------------------------------------
+// No-op defaults for graceful degradation
+// ---------------------------------------------------------------------------
+
+/** Storage adapter that stores nothing (in-memory, ephemeral) */
+export class NoopStorageAdapter implements StorageAdapter {
+  private syncStore = new Map();
+  private localStore = new Map();
+
+  async getSync(keys: string | string[]): Promise> {
+    const keyList = Array.isArray(keys) ? keys : [keys];
+    const result: Record = {};
+    for (const key of keyList) {
+      if (this.syncStore.has(key)) {
+        result[key] = this.syncStore.get(key);
+      }
+    }
+    return result;
+  }
+
+  async setSync(data: Record): Promise {
+    for (const [key, value] of Object.entries(data)) {
+      this.syncStore.set(key, value);
+    }
+  }
+
+  async getLocal(keys: string | string[]): Promise> {
+    const keyList = Array.isArray(keys) ? keys : [keys];
+    const result: Record = {};
+    for (const key of keyList) {
+      if (this.localStore.has(key)) {
+        result[key] = this.localStore.get(key);
+      }
+    }
+    return result;
+  }
+
+  async setLocal(data: Record): Promise {
+    for (const [key, value] of Object.entries(data)) {
+      this.localStore.set(key, value);
+    }
+  }
+}
+
+/** Messaging adapter that returns empty responses */
+export class NoopMessagingAdapter implements MessagingAdapter {
+  async send(_message: IPCMessage): Promise {
+    return {};
+  }
+}
+
+/** File adapter that rejects all operations */
+export class NoopFileAdapter implements FileAdapter {
+  async writeFile(_path: string, _content: string): Promise {
+    return { success: false, error: 'No file adapter configured' };
+  }
+
+  async readFile(_path: string): Promise {
+    throw new Error('No file adapter configured');
+  }
+
+  async checkChanged(
+    _url: string,
+    _lastHash: string
+  ): Promise {
+    return { changed: false };
+  }
+
+  watch(_path: string, _callback: () => void): () => void {
+    return () => {};
+  }
+}
+
+/** Identity adapter that returns empty username */
+export class NoopIdentityAdapter implements IdentityAdapter {
+  async getUsername(): Promise {
+    return '';
+  }
+}
+
+/** Export adapter that does nothing */
+export class NoopExportAdapter implements ExportAdapter {
+  async saveFile(_options: ExportSaveOptions): Promise {
+    // No-op in environments without export capability
+  }
+}
+
+/** Create a PlatformAdapters bundle with all no-op defaults */
+export function createNoopAdapters(): PlatformAdapters {
+  return {
+    storage: new NoopStorageAdapter(),
+    messaging: new NoopMessagingAdapter(),
+    file: new NoopFileAdapter(),
+    identity: new NoopIdentityAdapter(),
+    export: new NoopExportAdapter(),
+  };
+}
diff --git a/src/core/cache-manager.ts b/packages/core/src/cache-manager.ts
similarity index 96%
rename from src/core/cache-manager.ts
rename to packages/core/src/cache-manager.ts
index a4e1cec..8b297cb 100644
--- a/src/core/cache-manager.ts
+++ b/packages/core/src/cache-manager.ts
@@ -3,8 +3,13 @@
  * In-memory cache with SHA-256 hash-based keys for rendered markdown content
  */
 
-import type { CachedResult, CacheEntry, ThemeName } from '../types';
-import { debug } from '../utils/debug-logger';
+import type { CachedResult, CacheEntry, ThemeName } from './types/index';
+
+// Lightweight debug facade — no Chrome dependency
+const debug = {
+  log: (..._args: unknown[]) => {},
+  info: (..._args: unknown[]) => {},
+};
 
 export interface CacheOptions {
   maxSize?: number; // Max cache entries (default: 50)
diff --git a/src/comments/annotation-parser.ts b/packages/core/src/comments/annotation-parser.ts
similarity index 99%
rename from src/comments/annotation-parser.ts
rename to packages/core/src/comments/annotation-parser.ts
index d3a0fb2..7789d2b 100644
--- a/src/comments/annotation-parser.ts
+++ b/packages/core/src/comments/annotation-parser.ts
@@ -9,7 +9,7 @@
  * separator with footnote definitions.
  */
 
-import type { Comment, CommentContext, CommentParseResult, CommentReply } from '../types';
+import type { Comment, CommentContext, CommentParseResult, CommentReply } from '../types/index';
 import { parseComments } from './comment-parser';
 
 const V1_SENTINEL = '';
diff --git a/src/comments/annotation-serializer.ts b/packages/core/src/comments/annotation-serializer.ts
similarity index 99%
rename from src/comments/annotation-serializer.ts
rename to packages/core/src/comments/annotation-serializer.ts
index cbc563f..623eec8 100644
--- a/src/comments/annotation-serializer.ts
+++ b/packages/core/src/comments/annotation-serializer.ts
@@ -8,7 +8,7 @@
  * signatures. On v1 input, automatically migrates to v2 format.
  */
 
-import type { Comment, CommentReply } from '../types';
+import type { Comment, CommentReply } from '../types/index';
 import type { SourcePositionMap, SelectionContext } from './source-position-map';
 import { findInsertionPoint } from './source-position-map';
 import { parseComments } from './comment-parser';
diff --git a/src/comments/comment-context.ts b/packages/core/src/comments/comment-context.ts
similarity index 91%
rename from src/comments/comment-context.ts
rename to packages/core/src/comments/comment-context.ts
index 901fd8e..02b0634 100644
--- a/src/comments/comment-context.ts
+++ b/packages/core/src/comments/comment-context.ts
@@ -7,17 +7,14 @@
  * the raw file can immediately understand where each comment is anchored.
  */
 
-import type { CommentContext } from '../types';
+import type { CommentContext } from '../types/index';
 import { splitIntoSections, type MarkdownSection } from '../utils/section-splitter';
 
 /**
  * Compute positional context for a comment at a given character offset
  * in the content section of markdown (above the comment separator).
  */
-export function computeCommentContext(
-  contentMarkdown: string,
-  charOffset: number
-): CommentContext {
+export function computeCommentContext(contentMarkdown: string, charOffset: number): CommentContext {
   const line = offsetToLine(contentMarkdown, charOffset);
   const sections = splitIntoSections(contentMarkdown);
   const { section, sectionLevel, breadcrumb } = findSectionContext(sections, line);
@@ -83,10 +80,7 @@ function findSectionContext(
  * when encountering a heading at level N, pop all headings at level >= N,
  * then push. The final stack is the breadcrumb.
  */
-function buildBreadcrumb(
-  sections: MarkdownSection[],
-  target: MarkdownSection
-): string[] {
+function buildBreadcrumb(sections: MarkdownSection[], target: MarkdownSection): string[] {
   const stack: Array<{ heading: string; level: number }> = [];
 
   for (const s of sections) {
diff --git a/src/comments/comment-highlight.ts b/packages/core/src/comments/comment-highlight.ts
similarity index 99%
rename from src/comments/comment-highlight.ts
rename to packages/core/src/comments/comment-highlight.ts
index 84e2241..c22cd1a 100644
--- a/src/comments/comment-highlight.ts
+++ b/packages/core/src/comments/comment-highlight.ts
@@ -1,4 +1,4 @@
-import type { Comment } from '../types';
+import type { Comment } from '../types/index';
 
 const HIGHLIGHT_CLASS = 'mdview-comment-highlight';
 const COMMENT_ID_ATTR = 'data-comment-id';
diff --git a/src/comments/comment-manager.ts b/packages/core/src/comments/comment-manager.ts
similarity index 93%
rename from src/comments/comment-manager.ts
rename to packages/core/src/comments/comment-manager.ts
index b4c9daf..3fa1ec2 100644
--- a/src/comments/comment-manager.ts
+++ b/packages/core/src/comments/comment-manager.ts
@@ -1,12 +1,21 @@
 /**
- * Comment Manager
+ * Comment Manager (core)
  *
  * CRUD orchestrator that connects the comment parser, serializer, UI,
- * text highlighter, and native host file-writing into a single cohesive
- * controller. All comment lifecycle operations flow through this class.
+ * text highlighter, and file-writing into a single cohesive controller.
+ * All comment lifecycle operations flow through this class.
+ *
+ * This core version uses FileAdapter and IdentityAdapter instead of
+ * chrome.runtime.sendMessage, allowing it to work in any environment
+ * (Chrome extension, Electron, Node.js, tests).
+ *
+ * Both adapters are optional — the manager degrades gracefully:
+ * - Without FileAdapter: file writes are silently skipped
+ * - Without IdentityAdapter: empty username is used as fallback
  */
 
-import type { Comment, CommentParseResult, AppState, CommentTag } from '../types';
+import type { Comment, CommentParseResult, AppState, CommentTag } from '../types/index';
+import type { FileAdapter, IdentityAdapter } from '../adapters';
 import { CommentUI } from './comment-ui';
 import { CommentHighlighter } from './comment-highlight';
 import { parseComments } from './annotation-parser';
@@ -25,6 +34,11 @@ import { buildSourceMap, findInsertionPoint } from './source-position-map';
 import type { SourcePositionMap, SelectionContext } from './source-position-map';
 import { computeCommentContext } from './comment-context';
 
+export interface CommentManagerAdapters {
+  file?: FileAdapter;
+  identity?: IdentityAdapter;
+}
+
 export class CommentManager {
   private comments: Comment[] = [];
   private rawMarkdown: string = '';
@@ -36,6 +50,9 @@ export class CommentManager {
   private sourceMap: SourcePositionMap | null = null;
   private pendingContext: SelectionContext | null = null;
 
+  private readonly fileAdapter: FileAdapter | null;
+  private readonly identityAdapter: IdentityAdapter | null;
+
   private windowListeners: Array<{
     event: string;
     handler: EventListener;
@@ -51,6 +68,11 @@ export class CommentManager {
    *  to prevent the auto-reload from triggering on our own write. */
   private static readonly WRITE_GUARD_DELAY = 2000;
 
+  constructor(adapters?: CommentManagerAdapters) {
+    this.fileAdapter = adapters?.file ?? null;
+    this.identityAdapter = adapters?.identity ?? null;
+  }
+
   /**
    * Parse existing comments from raw markdown, set up UI and highlights,
    * and wire event listeners for user actions.
@@ -64,16 +86,15 @@ export class CommentManager {
     this.filePath = filePath;
     this.authorName = preferences.commentAuthor ?? '';
 
-    // If no author configured, try to get system username from native host
-    if (!this.authorName) {
+    // If no author configured, try to get username from identity adapter
+    if (!this.authorName && this.identityAdapter) {
       try {
-        const resp = await chrome.runtime.sendMessage({ type: 'GET_USERNAME' }) as
-          { username?: string } | undefined;
-        if (resp?.username) {
-          this.authorName = resp.username;
+        const username = await this.identityAdapter.getUsername();
+        if (username) {
+          this.authorName = username;
         }
       } catch {
-        // Native host may not be installed — leave author empty
+        // Identity adapter may fail — leave author empty
       }
     }
 
@@ -335,7 +356,7 @@ export class CommentManager {
       this.repositionAllCards();
     }
 
-    // Write to file in the background
+    // Write to file via adapter (if available)
     try {
       await this.writeFile(updatedMarkdown);
       if (this.ui) this.ui.showToast('Comment saved');
@@ -460,19 +481,21 @@ export class CommentManager {
   }
 
   /**
-   * Write content to the file via the native messaging host.
+   * Write content to the file via the FileAdapter.
+   * If no FileAdapter is configured, the write is silently skipped.
    */
   private async writeFile(content: string): Promise {
+    if (!this.fileAdapter) {
+      // No file adapter — graceful degradation, skip write
+      return;
+    }
+
     this.writeInProgress = true;
     try {
-      // Relay through service worker since content scripts can't use sendNativeMessage
-      const response = await chrome.runtime.sendMessage({
-        type: 'WRITE_FILE',
-        payload: { path: this.filePath, content },
-      }) as { success?: boolean; error?: string };
-
-      if (response?.error) {
-        throw new Error(response.error);
+      const result = await this.fileAdapter.writeFile(this.filePath, content);
+
+      if (!result.success && result.error) {
+        throw new Error(result.error);
       }
     } finally {
       // Keep the guard active for a grace period so the auto-reload watcher
diff --git a/src/comments/comment-parser.ts b/packages/core/src/comments/comment-parser.ts
similarity index 99%
rename from src/comments/comment-parser.ts
rename to packages/core/src/comments/comment-parser.ts
index e6c2b95..58ab9c5 100644
--- a/src/comments/comment-parser.ts
+++ b/packages/core/src/comments/comment-parser.ts
@@ -10,7 +10,7 @@
  * v1 backward compatibility delegation from the annotation parser.
  */
 
-import type { Comment, CommentContext, CommentMetadata, CommentParseResult } from '../types';
+import type { Comment, CommentContext, CommentMetadata, CommentParseResult } from '../types/index';
 
 const COMMENT_SEPARATOR = '';
 const COMMENT_REF_PATTERN = /\[\^comment-(\w+)\]/g;
diff --git a/src/comments/comment-serializer.ts b/packages/core/src/comments/comment-serializer.ts
similarity index 99%
rename from src/comments/comment-serializer.ts
rename to packages/core/src/comments/comment-serializer.ts
index 96a6a54..d2cc399 100644
--- a/src/comments/comment-serializer.ts
+++ b/packages/core/src/comments/comment-serializer.ts
@@ -16,7 +16,7 @@
  * imported by production code.
  */
 
-import type { Comment, CommentMetadata, CommentReply } from '../types';
+import type { Comment, CommentMetadata, CommentReply } from '../types/index';
 import type { SourcePositionMap, SelectionContext } from './source-position-map';
 import { findInsertionPoint } from './source-position-map';
 
diff --git a/src/comments/comment-ui.ts b/packages/core/src/comments/comment-ui.ts
similarity index 99%
rename from src/comments/comment-ui.ts
rename to packages/core/src/comments/comment-ui.ts
index 31cc63f..6e99450 100644
--- a/src/comments/comment-ui.ts
+++ b/packages/core/src/comments/comment-ui.ts
@@ -5,7 +5,7 @@
  * Dispatches custom events for all user actions.
  */
 
-import type { Comment, CommentTag, CommentReply, CommentReactions } from '../types';
+import type { Comment, CommentTag, CommentReply, CommentReactions } from '../types/index';
 import { QUICK_EMOJIS, EMOJI_CATEGORIES, searchEmojis } from './emoji-data';
 
 const ALL_TAGS: CommentTag[] = [
diff --git a/src/comments/emoji-data.ts b/packages/core/src/comments/emoji-data.ts
similarity index 100%
rename from src/comments/emoji-data.ts
rename to packages/core/src/comments/emoji-data.ts
diff --git a/src/comments/source-position-map.ts b/packages/core/src/comments/source-position-map.ts
similarity index 100%
rename from src/comments/source-position-map.ts
rename to packages/core/src/comments/source-position-map.ts
diff --git a/src/core/export-controller.ts b/packages/core/src/export-controller.ts
similarity index 92%
rename from src/core/export-controller.ts
rename to packages/core/src/export-controller.ts
index 544a45a..8a9edc1 100644
--- a/src/core/export-controller.ts
+++ b/packages/core/src/export-controller.ts
@@ -3,10 +3,10 @@
  * Orchestrates the document export process
  */
 
-import type { ExportOptions, ExportProgress, ProgressCallback, ExportFormat } from '../types';
-import { ContentCollector } from '../utils/content-collector';
-import { SVGConverter } from '../utils/svg-converter';
-import { debug } from '../utils/debug-logger';
+import type { ExportOptions, ExportProgress, ProgressCallback, ExportFormat } from './types/index';
+import { ContentCollector } from './utils/content-collector';
+import { SVGConverter } from './utils/svg-converter';
+import { debug } from './utils/debug-logger';
 
 /**
  * Controls the export process from content collection to file download
@@ -30,7 +30,7 @@ export class ExportController {
       if (mermaidContainers.length > 0) {
         report('collecting', 2, 'Rendering diagrams...');
         try {
-          const { mermaidRenderer } = await import('../renderers/mermaid-renderer');
+          const { mermaidRenderer } = await import('./renderers/mermaid-renderer');
           await mermaidRenderer.renderAllImmediate(container);
         } catch (error) {
           debug.warn('ExportController', 'Could not force-render Mermaid diagrams before export:', error);
@@ -64,7 +64,7 @@ export class ExportController {
         report('generating', 55, 'Generating Word document...');
 
         // Dynamic import to avoid loading docx unless needed
-        const { DOCXGenerator } = await import('../utils/docx-generator');
+        const { DOCXGenerator } = await import('./utils/docx-generator');
         const generator = new DOCXGenerator();
 
         const blob = await generator.generate(content, images, {
@@ -135,4 +135,3 @@ export class ExportController {
     ); // Limit length with fallback
   }
 }
-
diff --git a/src/core/frontmatter-extractor.ts b/packages/core/src/frontmatter-extractor.ts
similarity index 100%
rename from src/core/frontmatter-extractor.ts
rename to packages/core/src/frontmatter-extractor.ts
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
new file mode 100644
index 0000000..20f12bd
--- /dev/null
+++ b/packages/core/src/index.ts
@@ -0,0 +1,118 @@
+// @mdview/core - shared rendering engine
+export const VERSION = '0.0.1';
+
+// Types
+export type * from './types/index';
+
+// Themes
+export { default as catppuccinFrappe } from './themes/catppuccin-frappe';
+export { default as catppuccinLatte } from './themes/catppuccin-latte';
+export { default as catppuccinMacchiato } from './themes/catppuccin-macchiato';
+export { default as catppuccinMocha } from './themes/catppuccin-mocha';
+export { default as githubDark } from './themes/github-dark';
+export { default as githubLight } from './themes/github-light';
+export { default as monokaiPro } from './themes/monokai-pro';
+export { default as monokai } from './themes/monokai';
+
+// Comment parsers & serializers
+// v2 annotation format (current)
+export { detectFormat, parseAnnotations } from './comments/annotation-parser';
+export {
+  generateNextCommentId,
+  addComment,
+  addCommentAtOffset,
+  removeComment,
+  updateComment,
+  resolveComment,
+  updateCommentMetadata,
+  addReply,
+  toggleReaction,
+} from './comments/annotation-serializer';
+// v1 comment format (legacy)
+export { parseComments } from './comments/comment-parser';
+// Comment manager
+export { CommentManager } from './comments/comment-manager';
+export type { CommentManagerAdapters } from './comments/comment-manager';
+// Comment UI
+export { CommentHighlighter } from './comments/comment-highlight';
+export { CommentUI } from './comments/comment-ui';
+// Context & utilities
+export * from './comments/comment-context';
+export * from './comments/source-position-map';
+export * from './comments/emoji-data';
+
+// Utilities
+export * from './utils/section-splitter';
+export * from './utils/filename-generator';
+export * from './utils/toc-stripper';
+export { FileScanner } from './utils/file-scanner';
+export type { WatchFileOptions } from './utils/file-scanner';
+export { DOMPurifierUtil, domPurifier } from './utils/dom-purifier';
+export { SkeletonRenderer } from './utils/skeleton-renderer';
+export type { SkeletonSection } from './utils/skeleton-renderer';
+export { ScrollManager } from './utils/scroll-manager';
+
+// Markdown converter
+export { MarkdownConverter, markdownConverter } from './markdown-converter';
+export type { ConvertOptions } from './markdown-converter';
+
+// Cache manager
+export { CacheManager, cacheManager } from './cache-manager';
+export type { CacheOptions } from './cache-manager';
+
+// Frontmatter extractor
+export { extractFrontmatter, renderFrontmatterHtml } from './frontmatter-extractor';
+export type { FrontmatterResult } from './frontmatter-extractor';
+
+// Debug logger
+export { DebugLogger, createDebugLogger, createDebug, debug } from './utils/debug-logger';
+export type { DebugHelpers } from './utils/debug-logger';
+
+// Theme engine
+export { ThemeEngine } from './theme-engine';
+export type { ThemeInfo, ThemeOverrides } from './theme-engine';
+
+// Render pipeline
+export { RenderPipeline } from './render-pipeline';
+export type {
+  RenderOptions,
+  RenderProgress,
+  ProgressCallback,
+  RenderPipelineOptions,
+} from './render-pipeline';
+
+// Renderers
+export {
+  SyntaxHighlighter,
+  syntaxHighlighter,
+  SYNTAX_THEME_MAP,
+} from './renderers/syntax-highlighter';
+export type { HighlightResult, DetectionResult } from './renderers/syntax-highlighter';
+export { MermaidRenderer, mermaidRenderer } from './renderers/mermaid-renderer';
+export type { MermaidOptions, DiagramControls } from './renderers/mermaid-renderer';
+
+// Export modules
+export { ContentCollector } from './utils/content-collector';
+export { SVGConverter } from './utils/svg-converter';
+export { DOCXGenerator } from './utils/docx-generator';
+export { PDFGenerator } from './utils/pdf-generator';
+export { ExportController } from './export-controller';
+
+// UI
+export { TocRenderer } from './ui/toc-renderer';
+export { ExportUI } from './ui/export-ui';
+export type { CoreExportUIOptions } from './ui/export-ui';
+
+// Lazy section renderer
+export { LazySectionRenderer } from './lazy-section-renderer';
+export type { LazySectionOptions } from './lazy-section-renderer';
+
+// Platform adapters
+export * from './adapters';
+
+// Workers
+export { WorkerPool, workerPool } from './workers/worker-pool';
+export type { WorkerPoolOptions } from './workers/worker-pool';
+export { handleParseTask } from './workers/tasks/parse-task';
+export { handleHighlightTask } from './workers/tasks/highlight-task';
+export { handleMermaidTask } from './workers/tasks/mermaid-task';
diff --git a/src/core/lazy-section-renderer.ts b/packages/core/src/lazy-section-renderer.ts
similarity index 97%
rename from src/core/lazy-section-renderer.ts
rename to packages/core/src/lazy-section-renderer.ts
index f0bd507..217dbef 100644
--- a/src/core/lazy-section-renderer.ts
+++ b/packages/core/src/lazy-section-renderer.ts
@@ -3,9 +3,9 @@
  * Renders markdown sections on-demand as they become visible
  */
 
-import type { MarkdownSection } from '../utils/section-splitter';
+import type { MarkdownSection } from './utils/section-splitter';
 import type { MarkdownConverter } from './markdown-converter';
-import { debug } from '../utils/debug-logger';
+import { debug } from './utils/debug-logger';
 
 export interface LazySectionOptions {
   rootMargin?: string;
diff --git a/src/core/markdown-converter.ts b/packages/core/src/markdown-converter.ts
similarity index 97%
rename from src/core/markdown-converter.ts
rename to packages/core/src/markdown-converter.ts
index 789c970..31154d6 100644
--- a/src/core/markdown-converter.ts
+++ b/packages/core/src/markdown-converter.ts
@@ -8,7 +8,7 @@ import markdownItAttrs from 'markdown-it-attrs';
 import markdownItAnchor from 'markdown-it-anchor';
 import markdownItTaskLists from 'markdown-it-task-lists';
 import * as emojiPlugin from 'markdown-it-emoji';
-import type { ConversionResult, ParseError, ValidationResult } from '../types';
+import type { ConversionResult, ParseError, ValidationResult } from './types/index';
 
 export interface ConvertOptions {
   baseUrl?: string;
@@ -111,10 +111,13 @@ export class MarkdownConverter {
         });
 
         // Store code in global registry (bypasses DOM insertion issues)
-        if (!window.__MDVIEW_MERMAID_CODE__) {
-          window.__MDVIEW_MERMAID_CODE__ = new Map();
+        // Guard for non-browser environments
+        if (typeof window !== 'undefined') {
+          if (!window.__MDVIEW_MERMAID_CODE__) {
+            window.__MDVIEW_MERMAID_CODE__ = new Map();
+          }
+          window.__MDVIEW_MERMAID_CODE__.set(id, code);
         }
-        window.__MDVIEW_MERMAID_CODE__.set(id, code);
 
         // Escape the code for safe HTML attribute storage
         // This allows the code to survive caching and be retrieved later
diff --git a/src/core/render-pipeline.ts b/packages/core/src/render-pipeline.ts
similarity index 87%
rename from src/core/render-pipeline.ts
rename to packages/core/src/render-pipeline.ts
index 5925b5f..278666e 100644
--- a/src/core/render-pipeline.ts
+++ b/packages/core/src/render-pipeline.ts
@@ -1,22 +1,35 @@
 /**
  * Render Pipeline
  * Multi-stage pipeline for rendering markdown with progressive enhancement
+ *
+ * Platform-agnostic version: uses MessagingAdapter instead of chrome.runtime.sendMessage.
+ * When no adapter is provided, caching is silently skipped (graceful degradation).
  */
 
 import { MarkdownConverter } from './markdown-converter';
 import { extractFrontmatter, renderFrontmatterHtml } from './frontmatter-extractor';
-import { domPurifier } from '../utils/dom-purifier';
-import { workerPool } from '../workers/worker-pool';
+import { domPurifier } from './utils/dom-purifier';
+import { workerPool } from './workers/worker-pool';
 import type {
   ConversionResult,
   ThemeName,
   CachedResult,
   ParseTaskPayload,
   CommentParseResult,
-} from '../types';
-import { debug } from '../utils/debug-logger';
-import { splitIntoSections } from '../utils/section-splitter';
-import { SkeletonRenderer } from '../utils/skeleton-renderer';
+} from './types/index';
+import { splitIntoSections } from './utils/section-splitter';
+import { SkeletonRenderer } from './utils/skeleton-renderer';
+import type { MessagingAdapter } from './adapters';
+
+// ---------------------------------------------------------------------------
+// No-op debug logger (temporary until debug-logger is extracted to core)
+// ---------------------------------------------------------------------------
+const debug = {
+  info: (..._args: unknown[]) => {},
+  debug: (..._args: unknown[]) => {},
+  error: (..._args: unknown[]) => {},
+  log: (..._args: unknown[]) => {},
+};
 
 export interface RenderOptions {
   container: HTMLElement;
@@ -46,17 +59,23 @@ export interface RenderProgress {
 
 export type ProgressCallback = (progress: RenderProgress) => void;
 
+export interface RenderPipelineOptions {
+  messaging?: MessagingAdapter;
+}
+
 export class RenderPipeline {
   private converter: MarkdownConverter;
   private progressCallbacks: Set = new Set();
   private cancelRequested = false;
   private workersEnabled = true;
-  private progressUpdateTimer: number | null = null;
+  private progressUpdateTimer: ReturnType | null = null;
   private lastProgressUpdate = 0;
   private lastCommentParseResult: CommentParseResult | null = null;
+  private messaging?: MessagingAdapter;
 
-  constructor() {
+  constructor(options?: RenderPipelineOptions) {
     this.converter = new MarkdownConverter();
+    this.messaging = options?.messaging;
     // Initialize workers in background
     void this.initializeWorkers();
   }
@@ -70,14 +89,14 @@ export class RenderPipeline {
     try {
       await workerPool.initialize();
       this.workersEnabled = true;
-      debug.info('RenderPipeline', '✅ Worker pool initialized');
+      debug.info('RenderPipeline', 'Worker pool initialized');
     } catch (error) {
       // Workers unavailable - WorkerPool already logged the reason
       // Silently fall back to synchronous rendering
       this.workersEnabled = false;
 
       // Only log errors for unexpected failures (non-file:// protocols)
-      if (window.location.protocol !== 'file:') {
+      if (typeof window !== 'undefined' && window.location?.protocol !== 'file:') {
         debug.error('RenderPipeline', 'Worker initialization failed, using sync fallback:', error);
       }
     }
@@ -107,8 +126,8 @@ export class RenderPipeline {
     const shouldUseWorkers = useWorkers && this.workersEnabled;
 
     try {
-      // Check cache if enabled (from service worker)
-      if (useCache && filePath) {
+      // Check cache if enabled and adapter is available
+      if (useCache && filePath && this.messaging) {
         const cacheKey = await this.getCacheKey(
           filePath,
           markdown,
@@ -145,7 +164,7 @@ export class RenderPipeline {
 
       // Preprocess: Strip existing TOC if custom TOC is enabled
       if ((preferences as { showToc?: boolean }).showToc) {
-        const { stripTableOfContents } = await import('../utils/toc-stripper');
+        const { stripTableOfContents } = await import('./utils/toc-stripper');
         const stripResult = stripTableOfContents(processedMarkdown);
         processedMarkdown = stripResult.markdown;
         if (stripResult.tocFound) {
@@ -156,7 +175,7 @@ export class RenderPipeline {
       // Preprocess: Strip comment footnotes before parsing
       this.lastCommentParseResult = null;
       if ((preferences as { commentsEnabled?: boolean }).commentsEnabled !== false) {
-        const { parseComments } = await import('../comments/annotation-parser');
+        const { parseComments } = await import('./comments/annotation-parser');
         this.lastCommentParseResult = parseComments(processedMarkdown);
         processedMarkdown = this.lastCommentParseResult.cleanedMarkdown;
         if (this.lastCommentParseResult.comments.length > 0) {
@@ -272,8 +291,8 @@ export class RenderPipeline {
       this.applyTheming(container);
       debug.info('RenderPipeline', 'Theme applied successfully');
 
-      // Cache the result if enabled (to service worker)
-      if (useCache && filePath) {
+      // Cache the result if enabled and adapter is available
+      if (useCache && filePath && this.messaging) {
         try {
           const cacheKey = await this.getCacheKey(
             filePath,
@@ -347,13 +366,22 @@ export class RenderPipeline {
     // Re-setup image lazy loading
     this.setupImageLazyLoading(container);
 
-    // Re-initialize Mermaid diagrams (they may need panzoom reinitialization)
-    const mermaidContainers = container.querySelectorAll('.mermaid-container.mermaid-ready');
-    if (mermaidContainers.length > 0) {
+    // Re-initialize Mermaid diagrams
+    const pendingMermaid = container.querySelectorAll('.mermaid-container.mermaid-pending');
+    const readyMermaid = container.querySelectorAll('.mermaid-container.mermaid-ready');
+
+    if (pendingMermaid.length > 0 || readyMermaid.length > 0) {
       try {
-        // Mermaid diagrams should already have SVG from cache
-        // Controls will be re-added automatically when mermaid module loads
-        await import('../renderers/mermaid-renderer');
+        const { mermaidRenderer } = await import('./renderers/mermaid-renderer');
+
+        // Re-render any pending diagrams that were cached before rendering completed
+        if (pendingMermaid.length > 0) {
+          debug.info(
+            'RenderPipeline',
+            `Re-rendering ${pendingMermaid.length} pending mermaid diagram(s) from stale cache`
+          );
+          await mermaidRenderer.renderAll(container);
+        }
       } catch (error) {
         debug.error('RenderPipeline', 'Failed to reinitialize mermaid:', error);
       }
@@ -378,11 +406,11 @@ export class RenderPipeline {
       await this.applySyntaxHighlighting(container);
     }
 
-    // CRITICAL: Mark Mermaid blocks (actual rendering happens lazily on intersection)
-    debug.debug('RenderPipeline', 'Marking Mermaid blocks...');
-    this.markMermaidBlocks(container);
+    // CRITICAL: Mark and render Mermaid blocks (awaited so cache captures rendered state)
+    debug.debug('RenderPipeline', 'Rendering Mermaid blocks...');
+    await this.markAndRenderMermaidBlocks(container);
 
-    debug.debug('RenderPipeline', 'Syntax highlighting complete');
+    debug.debug('RenderPipeline', 'Enhancement complete');
 
     // NON-CRITICAL: Schedule remaining enhancements during idle time
     // This improves perceived performance by not blocking the main render
@@ -405,7 +433,7 @@ export class RenderPipeline {
     };
 
     // Use requestIdleCallback if available, otherwise setTimeout
-    if ('requestIdleCallback' in window) {
+    if (typeof requestIdleCallback !== 'undefined') {
       requestIdleCallback(runEnhancements, { timeout: 100 });
     } else {
       setTimeout(runEnhancements, 0);
@@ -420,7 +448,7 @@ export class RenderPipeline {
     // Even with workers available, use lazy loading for instant content display
     // Only visible code blocks are highlighted immediately, rest on scroll
     try {
-      const { syntaxHighlighter } = await import('../renderers/syntax-highlighter');
+      const { syntaxHighlighter } = await import('./renderers/syntax-highlighter');
       syntaxHighlighter.highlightVisible(container);
     } catch (error) {
       debug.error('RenderPipeline', 'Syntax highlighting error:', error);
@@ -438,7 +466,7 @@ export class RenderPipeline {
     if (timeSinceLastUpdate < 100 && progress.stage !== 'complete' && progress.stage !== 'cached') {
       // Schedule update for later if not already scheduled
       if (!this.progressUpdateTimer) {
-        this.progressUpdateTimer = window.setTimeout(() => {
+        this.progressUpdateTimer = setTimeout(() => {
           this.notifyProgress(progress);
           this.progressUpdateTimer = null;
           this.lastProgressUpdate = Date.now();
@@ -452,7 +480,7 @@ export class RenderPipeline {
   }
 
   /**
-   * Get cache key from service worker
+   * Get cache key via messaging adapter
    */
   private async getCacheKey(
     filePath: string,
@@ -460,7 +488,10 @@ export class RenderPipeline {
     theme: ThemeName,
     preferences: Record
   ): Promise {
-    const response: unknown = await chrome.runtime.sendMessage({
+    if (!this.messaging) {
+      return '';
+    }
+    const response: unknown = await this.messaging.send({
       type: 'CACHE_GENERATE_KEY',
       payload: { filePath, content, theme, preferences },
     });
@@ -468,10 +499,13 @@ export class RenderPipeline {
   }
 
   /**
-   * Get cached result from service worker
+   * Get cached result via messaging adapter
    */
   private async getCachedResult(key: string): Promise {
-    const response: unknown = await chrome.runtime.sendMessage({
+    if (!this.messaging) {
+      return null;
+    }
+    const response: unknown = await this.messaging.send({
       type: 'CACHE_GET',
       payload: { key },
     });
@@ -479,7 +513,7 @@ export class RenderPipeline {
   }
 
   /**
-   * Set cached result in service worker
+   * Set cached result via messaging adapter
    */
   private async setCachedResult(
     key: string,
@@ -488,14 +522,17 @@ export class RenderPipeline {
     contentHash: string,
     theme: ThemeName
   ): Promise {
-    await chrome.runtime.sendMessage({
+    if (!this.messaging) {
+      return;
+    }
+    await this.messaging.send({
       type: 'CACHE_SET',
       payload: { key, result, filePath, contentHash, theme },
     });
   }
 
   /**
-   * Generate content hash via service worker
+   * Generate content hash
    */
   private async generateContentHash(content: string): Promise {
     const encoder = new TextEncoder();
@@ -571,7 +608,7 @@ export class RenderPipeline {
 
     // Preprocess: Strip existing TOC if custom TOC is enabled
     if ((preferences as { showToc?: boolean }).showToc) {
-      const { stripTableOfContents } = await import('../utils/toc-stripper');
+      const { stripTableOfContents } = await import('./utils/toc-stripper');
       const stripResult = stripTableOfContents(processedMarkdown);
       processedMarkdown = stripResult.markdown;
       if (stripResult.tocFound) {
@@ -582,7 +619,7 @@ export class RenderPipeline {
     // Preprocess: Strip comment footnotes before parsing
     this.lastCommentParseResult = null;
     if ((preferences as { commentsEnabled?: boolean }).commentsEnabled !== false) {
-      const { parseComments } = await import('../comments/annotation-parser');
+      const { parseComments } = await import('./comments/annotation-parser');
       this.lastCommentParseResult = parseComments(processedMarkdown);
       processedMarkdown = this.lastCommentParseResult.cleanedMarkdown;
       if (this.lastCommentParseResult.comments.length > 0) {
@@ -770,7 +807,7 @@ export class RenderPipeline {
    */
   private async applySyntaxHighlighting(container: HTMLElement): Promise {
     try {
-      const { syntaxHighlighter } = await import('../renderers/syntax-highlighter');
+      const { syntaxHighlighter } = await import('./renderers/syntax-highlighter');
       syntaxHighlighter.highlightVisible(container);
     } catch (error) {
       debug.error('RenderPipeline', 'Syntax highlighting error:', error);
@@ -867,13 +904,13 @@ export class RenderPipeline {
           void (async () => {
             try {
               await navigator.clipboard.writeText(code.textContent || '');
-              copyButton.textContent = '✓ Copied';
+              copyButton.textContent = 'Copied';
               setTimeout(() => {
                 copyButton.textContent = 'Copy';
               }, 2000);
             } catch (error) {
               debug.error('RenderPipeline', 'Failed to copy:', error);
-              copyButton.textContent = '✗ Failed';
+              copyButton.textContent = 'Failed';
               setTimeout(() => {
                 copyButton.textContent = 'Copy';
               }, 2000);
@@ -914,18 +951,18 @@ export class RenderPipeline {
   }
 
   /**
-   * Mark Mermaid blocks for rendering
+   * Mark Mermaid blocks for rendering and await completion
    */
-  private markMermaidBlocks(container: HTMLElement): void {
+  private async markAndRenderMermaidBlocks(container: HTMLElement): Promise {
     const mermaidBlocks = container.querySelectorAll('.mermaid-container');
     mermaidBlocks.forEach((block) => {
       block.classList.add('mermaid-pending');
     });
 
-    // Initialize Mermaid renderer
-    this.renderMermaidDiagrams(container).catch((error) => {
-      debug.error('RenderPipeline', 'Mermaid rendering catch error:', error);
-    });
+    // Await mermaid rendering so cache captures the rendered state
+    if (mermaidBlocks.length > 0) {
+      await this.renderMermaidDiagrams(container);
+    }
   }
 
   /**
@@ -933,7 +970,7 @@ export class RenderPipeline {
    */
   private async renderMermaidDiagrams(container: HTMLElement): Promise {
     try {
-      const { mermaidRenderer } = await import('../renderers/mermaid-renderer');
+      const { mermaidRenderer } = await import('./renderers/mermaid-renderer');
       await mermaidRenderer.renderAll(container);
     } catch (error) {
       debug.error('RenderPipeline', 'Mermaid rendering error:', error);
@@ -1003,7 +1040,7 @@ export class RenderPipeline {
     const errorMessage = error instanceof Error ? error.message : String(error);
     container.innerHTML = `
       

     });
   });
 });
-
-
diff --git a/tests/unit/utils/docx-generator.test.ts b/tests/unit/utils/docx-generator.test.ts
index bb92d7a..8a320a1 100644
--- a/tests/unit/utils/docx-generator.test.ts
+++ b/tests/unit/utils/docx-generator.test.ts
@@ -3,8 +3,8 @@
  */
 
 import { describe, test, expect, beforeEach } from 'vitest';
-import { DOCXGenerator } from '../../../src/utils/docx-generator';
-import type { ContentNode, CollectedContent, ConvertedImage } from '../../../src/types';
+import { DOCXGenerator } from '@mdview/core';
+import type { ContentNode, CollectedContent, ConvertedImage } from '@mdview/core';
 
 describe('DOCXGenerator', () => {
   let generator: DOCXGenerator;
@@ -49,7 +49,9 @@ describe('DOCXGenerator', () => {
       const blob = await generator.generate(content, new Map());
 
       expect(blob).toBeInstanceOf(Blob);
-      expect(blob.type).toBe('application/vnd.openxmlformats-officedocument.wordprocessingml.document');
+      expect(blob.type).toBe(
+        'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
+      );
       expect(blob.size).toBeGreaterThan(0);
     });
 
@@ -394,7 +396,10 @@ describe('DOCXGenerator', () => {
     });
 
     test('should apply borders', async () => {
-      const tableData = [['A', 'B'], ['C', 'D']];
+      const tableData = [
+        ['A', 'B'],
+        ['C', 'D'],
+      ];
 
       const content = createTestContent([
         {
@@ -575,4 +580,3 @@ describe('DOCXGenerator', () => {
     });
   });
 });
-
diff --git a/tests/unit/utils/dom-purifier.test.ts b/tests/unit/utils/dom-purifier.test.ts
index 506f5ba..e642cf7 100644
--- a/tests/unit/utils/dom-purifier.test.ts
+++ b/tests/unit/utils/dom-purifier.test.ts
@@ -3,7 +3,7 @@
  */
 
 import { describe, test, expect, beforeEach } from 'vitest';
-import { DOMPurifierUtil } from '../../../src/utils/dom-purifier';
+import { DOMPurifierUtil } from '@mdview/core';
 import { xssPayloads } from '../../helpers/fixtures';
 
 describe('DOMPurifier', () => {
diff --git a/tests/unit/utils/file-scanner-blocklist.test.ts b/tests/unit/utils/file-scanner-blocklist.test.ts
index 6cd28d8..2799cc5 100644
--- a/tests/unit/utils/file-scanner-blocklist.test.ts
+++ b/tests/unit/utils/file-scanner-blocklist.test.ts
@@ -3,7 +3,7 @@
  */
 
 import { describe, it, expect, beforeEach, vi } from 'vitest';
-import { FileScanner } from '../../../src/utils/file-scanner';
+import { FileScanner } from '../../../packages/chrome-ext/src/utils/file-scanner';
 
 describe('FileScanner Blocklist', () => {
   beforeEach(() => {
diff --git a/tests/unit/utils/filename-generator.test.ts b/tests/unit/utils/filename-generator.test.ts
index d157401..75e4478 100644
--- a/tests/unit/utils/filename-generator.test.ts
+++ b/tests/unit/utils/filename-generator.test.ts
@@ -3,7 +3,7 @@
  */
 
 import { describe, test, expect, beforeEach, vi } from 'vitest';
-import { FilenameGenerator } from '../../../src/utils/filename-generator';
+import { FilenameGenerator } from '@mdview/core';
 
 describe('FilenameGenerator', () => {
   beforeEach(() => {
@@ -180,4 +180,3 @@ describe('FilenameGenerator', () => {
     });
   });
 });
-
diff --git a/tests/unit/utils/pdf-generator.test.ts b/tests/unit/utils/pdf-generator.test.ts
index 0c67458..17fea67 100644
--- a/tests/unit/utils/pdf-generator.test.ts
+++ b/tests/unit/utils/pdf-generator.test.ts
@@ -3,20 +3,37 @@
  */
 
 import { describe, test, expect, beforeEach, vi, afterEach } from 'vitest';
-import { PDFGenerator } from '../../../src/utils/pdf-generator';
+import { PDFGenerator } from '@mdview/core';
 
-// Mock the debug logger
-vi.mock('../../../src/utils/debug-logger', () => ({
-  debug: {
+// Mock the debug logger (core internal)
+vi.mock('../../../packages/core/src/utils/debug-logger', () => {
+  const mockHelpers = {
     info: vi.fn(),
     warn: vi.fn(),
     error: vi.fn(),
     debug: vi.fn(),
-  },
-}));
+    log: vi.fn(),
+  };
+  return {
+    debug: mockHelpers,
+    createDebug: vi.fn(() => mockHelpers),
+    createDebugLogger: vi.fn(() => ({
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+      debug: vi.fn(),
+    })),
+    DebugLogger: vi.fn().mockImplementation(() => ({
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+      debug: vi.fn(),
+    })),
+  };
+});
 
-// Mock SVGConverter
-vi.mock('../../../src/utils/svg-converter', () => ({
+// Mock SVGConverter (core internal dependency of PDFGenerator)
+vi.mock('../../../packages/core/src/utils/svg-converter', () => ({
   SVGConverter: vi.fn().mockImplementation(() => ({
     convert: vi.fn().mockResolvedValue({
       id: 'test-svg',
@@ -28,8 +45,8 @@ vi.mock('../../../src/utils/svg-converter', () => ({
   })),
 }));
 
-// Mock mermaid renderer
-vi.mock('../../../src/renderers/mermaid-renderer', () => ({
+// Mock mermaid renderer (core internal dependency)
+vi.mock('../../../packages/core/src/renderers/mermaid-renderer', () => ({
   mermaidRenderer: {
     renderAllImmediate: vi.fn().mockResolvedValue(undefined),
   },
@@ -76,7 +93,9 @@ describe('PDFGenerator', () => {
     HTMLCanvasElement.prototype.getContext = vi.fn().mockReturnValue({
       drawImage: vi.fn(),
     });
-    HTMLCanvasElement.prototype.toDataURL = vi.fn().mockReturnValue('data:image/png;base64,mockdata');
+    HTMLCanvasElement.prototype.toDataURL = vi
+      .fn()
+      .mockReturnValue('data:image/png;base64,mockdata');
 
     // Mock getBoundingClientRect for SVGs
     Element.prototype.getBoundingClientRect = vi.fn().mockReturnValue({
@@ -247,7 +266,7 @@ describe('PDFGenerator', () => {
       svgContainer.appendChild(mermaidDiv);
 
       // Mock converter to throw error
-      const { SVGConverter } = await import('../../../src/utils/svg-converter');
+      const { SVGConverter } = await import('@mdview/core');
       (SVGConverter as any).mockImplementationOnce(() => ({
         convert: vi.fn().mockRejectedValue(new Error('Conversion failed')),
       }));
@@ -310,9 +329,7 @@ describe('PDFGenerator', () => {
         throw new Error('Print failed');
       });
 
-      await expect(
-        generator.print(svgContainer, { convertSvgsToImages: true })
-      ).rejects.toThrow();
+      await expect(generator.print(svgContainer, { convertSvgsToImages: true })).rejects.toThrow();
 
       // SVGs should be restored even on error
       const restoredSvg = mermaidDiv.querySelector('svg');
@@ -320,4 +337,3 @@ describe('PDFGenerator', () => {
     });
   });
 });
-
diff --git a/tests/unit/utils/svg-converter.test.ts b/tests/unit/utils/svg-converter.test.ts
index 4e19cba..086149d 100644
--- a/tests/unit/utils/svg-converter.test.ts
+++ b/tests/unit/utils/svg-converter.test.ts
@@ -7,7 +7,7 @@
  */
 
 import { describe, it, expect, beforeEach } from 'vitest';
-import { SVGConverter } from '../../../src/utils/svg-converter';
+import { SVGConverter } from '@mdview/core';
 
 /**
  * Helper to create a mock SVG element
diff --git a/tests/unit/utils/toc-stripper.test.ts b/tests/unit/utils/toc-stripper.test.ts
index 96a75c0..0150099 100644
--- a/tests/unit/utils/toc-stripper.test.ts
+++ b/tests/unit/utils/toc-stripper.test.ts
@@ -3,7 +3,7 @@
  */
 
 import { describe, it, expect } from 'vitest';
-import { stripTableOfContents } from '../../../src/utils/toc-stripper';
+import { stripTableOfContents } from '@mdview/core';
 
 describe('stripTableOfContents', () => {
   describe('Basic TOC Detection', () => {
diff --git a/tsconfig.json b/tsconfig.json
index fb19e33..4683906 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -17,10 +17,10 @@
     "types": ["chrome", "vite/client", "vitest/globals"],
     "baseUrl": ".",
     "paths": {
-      "@/*": ["src/*"]
+      "@/*": ["packages/chrome-ext/src/*"]
     }
   },
-  "include": ["src/**/*", "tests/**/*"],
+  "include": ["packages/*/src/**/*", "tests/**/*"],
   "exclude": ["node_modules", "dist"]
 }
 
diff --git a/vitest.config.ts b/vitest.config.ts
index 7ad0f8e..29f060a 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -28,7 +28,7 @@ export default defineConfig({
   },
   resolve: {
     alias: {
-      '@': resolve(__dirname, './src'),
+      '@': resolve(__dirname, './packages/chrome-ext/src'),
     },
   },
 });
diff --git a/vitest.workspace.ts b/vitest.workspace.ts
new file mode 100644
index 0000000..ee916e3
--- /dev/null
+++ b/vitest.workspace.ts
@@ -0,0 +1,19 @@
+import { defineWorkspace } from 'vitest/config';
+
+export default defineWorkspace([
+  {
+    extends: './vitest.config.ts',
+    test: {
+      name: 'chrome-ext',
+      include: ['tests/**/*.test.ts'],
+    },
+  },
+  {
+    extends: './packages/core/vitest.config.ts',
+    test: {
+      name: 'core',
+      root: './packages/core',
+      include: ['src/**/*.test.ts'],
+    },
+  },
+]);