docs: add bun tab to all install code-groups

AGENTS.md

@@ -247,6 +247,7 @@ Never use `98865`—that is a deprecated chain ID.
 ## Rules
 
 1. **Alphabetize everything** - Object properties in code examples and ### parameter headings must be alphabetically ordered
+13. **Install code-groups must include npm, pnpm, and bun** - Every `:::code-group` with install commands must have all three tabs: `npm`, `pnpm`, and `bun`. Use `npm install`, `pnpm add`, and `bun add` respectively.
 12. **No `// @noErrors` in twoslash** - NEVER use `// @noErrors` in twoslash code blocks. All snippets must typecheck against the installed mppx types. If a snippet fails, fix the snippet or bump the mppx version — do not suppress the error.
 2. **No code-groups for variants** - Use separate ### sections under ## Usage for different usage patterns (e.g., `### With MCP Transport`), not `:::code-group`
 3. **Keep descriptions concise** - One line for the intro, brief explanations for parameters

scripts/check-install-tabs.test.ts

@@ -0,0 +1,88 @@
+import { readdirSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+
+const PAGES_DIR = join(import.meta.dirname, "../src/pages");
+const REQUIRED_TABS = ["npm", "pnpm", "bun"] as const;
+
+/**
+ * Recursively find all .mdx files under a directory.
+ */
+function findMdxFiles(dir: string): string[] {
+  const results: string[] = [];
+  for (const entry of readdirSync(dir, { withFileTypes: true })) {
+    const fullPath = join(dir, entry.name);
+    if (entry.isDirectory()) {
+      results.push(...findMdxFiles(fullPath));
+    } else if (entry.name.endsWith(".mdx")) {
+      results.push(fullPath);
+    }
+  }
+  return results;
+}
+
+/**
+ * Find install code-groups in MDX content and check they have all three tabs.
+ * Returns an array of violations with line numbers and missing tabs.
+ */
+function checkInstallTabs(
+  content: string,
+): Array<{ line: number; missing: string[] }> {
+  const lines = content.split("\n");
+  const violations: Array<{ line: number; missing: string[] }> = [];
+
+  for (let i = 0; i < lines.length; i++) {
+    // Look for a bash [npm] block that contains an install command
+    const line = lines[i];
+    if (!/^```bash \[npm\]/.test(line)) continue;
+
+    // Check the next line for an install command (npm install / npx)
+    const cmdLine = lines[i + 1] ?? "";
+    const isInstall =
+      /^\$?\s*npm install\b/.test(cmdLine) || /^\$?\s*npx\b/.test(cmdLine);
+    if (!isInstall) continue;
+
+    // Scan the surrounding code-group for which tabs exist
+    const found = new Set<string>(["npm"]);
+
+    // Scan forward until ::: closing
+    for (let j = i + 1; j < lines.length; j++) {
+      if (/^:::$/.test(lines[j].trim())) break;
+      const tabMatch = lines[j].match(/^```bash \[(npm|pnpm|bun)\]/);
+      if (tabMatch) found.add(tabMatch[1]);
+    }
+
+    const missing = REQUIRED_TABS.filter((t) => !found.has(t));
+    if (missing.length > 0) {
+      violations.push({ line: i + 1, missing });
+    }
+  }
+
+  return violations;
+}
+
+describe("install code-groups must include npm, pnpm, and bun", () => {
+  const files = findMdxFiles(PAGES_DIR);
+
+  for (const file of files) {
+    const relative = file.slice(PAGES_DIR.length + 1);
+    const content = readFileSync(file, "utf-8");
+    const violations = checkInstallTabs(content);
+
+    if (violations.length > 0) {
+      it(`${relative}`, () => {
+        const messages = violations.map(
+          (v) =>
+            `line ${v.line}: missing ${v.missing.map((t) => `[${t}]`).join(", ")} tab(s)`,
+        );
+        expect(violations).toHaveLength(0);
+        // Show details on failure:
+        expect.fail(`Install code-group missing tabs:\n${messages.join("\n")}`);
+      });
+    }
+  }
+
+  it("found mdx files to check", () => {
+    expect(files.length).toBeGreaterThan(0);
+  });
+});

src/pages/payment-methods/card/index.mdx

@@ -22,6 +22,9 @@ npm install mpp-card
 ```bash [pnpm]
 pnpm add mpp-card
 ```
+```bash [bun]
+bun add mpp-card
+```
 :::
 
 ## How it works

src/pages/payment-methods/lightning/index.mdx

@@ -17,6 +17,9 @@ npm install @buildonspark/lightning-mpp-sdk
 ```bash [pnpm]
 pnpm add @buildonspark/lightning-mpp-sdk
 ```
+```bash [bun]
+bun add @buildonspark/lightning-mpp-sdk
+```
 :::
 
 ## Payments on Lightning

src/pages/payment-methods/solana/index.mdx

@@ -17,6 +17,9 @@ npm install @solana/mpp mppx @solana/kit
 ```bash [pnpm]
 pnpm add @solana/mpp mppx @solana/kit
 ```
+```bash [bun]
+bun add @solana/mpp mppx @solana/kit
+```
 :::
 
 ## Why Solana