diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 65544fd..763d924 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -9,6 +9,21 @@
       "name": "astral",
       "source": "./plugins/astral",
       "description": "Skills for working with Python using Astral tools."
+    },
+    {
+      "name": "ruff-format",
+      "source": "./plugins/ruff-format",
+      "description": "Auto-format Python files with ruff after edits."
+    },
+    {
+      "name": "cargo-format",
+      "source": "./plugins/cargo-format",
+      "description": "Auto-format Rust files with cargo fmt after edits."
+    },
+    {
+      "name": "prettier-format",
+      "source": "./plugins/prettier-format",
+      "description": "Auto-format files with prettier after edits."
     }
   ]
 }
diff --git a/plugins/cargo-format/.claude-plugin/hooks/post-edit-format.py b/plugins/cargo-format/.claude-plugin/hooks/post-edit-format.py
new file mode 100644
index 0000000..27baa08
--- /dev/null
+++ b/plugins/cargo-format/.claude-plugin/hooks/post-edit-format.py
@@ -0,0 +1,45 @@
+# /// script
+# requires-python = ">=3.12"
+# dependencies = []
+# ///
+
+"""Post-edit hook to auto-format Rust files with cargo fmt."""
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+def main() -> None:
+    input_data = json.load(sys.stdin)
+
+    tool_name = input_data.get("tool_name")
+    tool_input = input_data.get("tool_input", {})
+    file_path = tool_input.get("file_path")
+
+    if tool_name not in ("Write", "Edit", "MultiEdit"):
+        return
+
+    if not file_path:
+        return
+
+    path = Path(file_path)
+    if path.suffix != ".rs":
+        return
+
+    cwd = os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
+
+    try:
+        subprocess.run(
+            ["cargo", "fmt", "--", file_path],
+            cwd=cwd,
+            capture_output=True,
+        )
+    except FileNotFoundError:
+        pass
+
+
+if __name__ == "__main__":
+    main()
diff --git a/plugins/cargo-format/.claude-plugin/plugin.json b/plugins/cargo-format/.claude-plugin/plugin.json
new file mode 100644
index 0000000..5006329
--- /dev/null
+++ b/plugins/cargo-format/.claude-plugin/plugin.json
@@ -0,0 +1,19 @@
+{
+  "name": "cargo-format",
+  "description": "Auto-format Rust files with cargo fmt after edits.",
+  "version": "0.1.0",
+  "author": {
+    "name": "Astral",
+    "url": "https://astral.sh"
+  },
+  "repository": "https://github.com/astral-sh/claude-code-plugins",
+  "license": "MIT",
+  "keywords": ["rust", "cargo", "formatting"],
+  "hooks": [
+    {
+      "type": "PostToolUse",
+      "command": "python",
+      "args": [".claude-plugin/hooks/post-edit-format.py"]
+    }
+  ]
+}
diff --git a/plugins/prettier-format/.claude-plugin/hooks/post-edit-format.py b/plugins/prettier-format/.claude-plugin/hooks/post-edit-format.py
new file mode 100644
index 0000000..0b69b9d
--- /dev/null
+++ b/plugins/prettier-format/.claude-plugin/hooks/post-edit-format.py
@@ -0,0 +1,45 @@
+# /// script
+# requires-python = ">=3.12"
+# dependencies = []
+# ///
+
+"""Post-edit hook to auto-format files with prettier."""
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+def main() -> None:
+    input_data = json.load(sys.stdin)
+
+    tool_name = input_data.get("tool_name")
+    tool_input = input_data.get("tool_input", {})
+    file_path = tool_input.get("file_path")
+
+    if tool_name not in ("Write", "Edit", "MultiEdit"):
+        return
+
+    if not file_path:
+        return
+
+    path = Path(file_path)
+    if path.suffix not in (".json5", ".yaml", ".yml", ".md"):
+        return
+
+    cwd = os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
+
+    try:
+        subprocess.run(
+            ["npx", "prettier", "--write", file_path],
+            cwd=cwd,
+            capture_output=True,
+        )
+    except FileNotFoundError:
+        pass
+
+
+if __name__ == "__main__":
+    main()
diff --git a/plugins/prettier-format/.claude-plugin/plugin.json b/plugins/prettier-format/.claude-plugin/plugin.json
new file mode 100644
index 0000000..183889b
--- /dev/null
+++ b/plugins/prettier-format/.claude-plugin/plugin.json
@@ -0,0 +1,15 @@
+{
+  "name": "prettier-format",
+  "description": "Auto-format files with prettier after edits.",
+  "version": "0.1.0",
+  "repository": "https://github.com/astral-sh/claude-code-plugins",
+  "license": "MIT",
+  "keywords": ["prettier", "formatting", "json", "yaml", "markdown"],
+  "hooks": [
+    {
+      "type": "PostToolUse",
+      "command": "python",
+      "args": [".claude-plugin/hooks/post-edit-format.py"]
+    }
+  ]
+}
diff --git a/plugins/ruff-format/.claude-plugin/hooks/post-edit-format.py b/plugins/ruff-format/.claude-plugin/hooks/post-edit-format.py
new file mode 100644
index 0000000..76ce4cf
--- /dev/null
+++ b/plugins/ruff-format/.claude-plugin/hooks/post-edit-format.py
@@ -0,0 +1,45 @@
+# /// script
+# requires-python = ">=3.12"
+# dependencies = []
+# ///
+
+"""Post-edit hook to auto-format Python files with ruff."""
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+def main() -> None:
+    input_data = json.load(sys.stdin)
+
+    tool_name = input_data.get("tool_name")
+    tool_input = input_data.get("tool_input", {})
+    file_path = tool_input.get("file_path")
+
+    if tool_name not in ("Write", "Edit", "MultiEdit"):
+        return
+
+    if not file_path:
+        return
+
+    path = Path(file_path)
+    if path.suffix not in (".py", ".pyi"):
+        return
+
+    cwd = os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
+
+    try:
+        subprocess.run(
+            ["uvx", "ruff", "format", file_path],
+            cwd=cwd,
+            capture_output=True,
+        )
+    except FileNotFoundError:
+        pass
+
+
+if __name__ == "__main__":
+    main()
diff --git a/plugins/ruff-format/.claude-plugin/plugin.json b/plugins/ruff-format/.claude-plugin/plugin.json
new file mode 100644
index 0000000..9d1b2dc
--- /dev/null
+++ b/plugins/ruff-format/.claude-plugin/plugin.json
@@ -0,0 +1,20 @@
+{
+  "name": "ruff-format",
+  "description": "Auto-format Python files with ruff after edits.",
+  "version": "0.1.0",
+  "author": {
+    "name": "Astral",
+    "url": "https://astral.sh"
+  },
+  "homepage": "https://docs.astral.sh/ruff/",
+  "repository": "https://github.com/astral-sh/claude-code-plugins",
+  "license": "MIT",
+  "keywords": ["ruff", "python", "formatting"],
+  "hooks": [
+    {
+      "type": "PostToolUse",
+      "command": "python",
+      "args": [".claude-plugin/hooks/post-edit-format.py"]
+    }
+  ]
+}