Add codegraph_explore tool and expand exclude patterns

- Add codegraph_explore MCP tool for deep exploration with condensed output
- Expand default exclude patterns for framework build outputs (.next, .nuxt, .expo, etc.)
- Increase node ID hash length from 16 to 32 chars to prevent collisions
- Add feature request detection with UX clarification reminders
- Update README with MCP tools reference and best practices
- Update CLAUDE.md with context usage guidelines

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/types.ts

@@ -498,21 +498,130 @@ export const DEFAULT_CONFIG: CodeGraphConfig = {
     '**/*.rb',
   ],
   exclude: [
+    // Version control
+    '**/.git/**',
+
+    // Dependencies
     '**/node_modules/**',
+    '**/vendor/**',
+    '**/Pods/**',
+
+    // Generic build outputs
     '**/dist/**',
     '**/build/**',
-    '**/.git/**',
-    '**/vendor/**',
-    '**/__pycache__/**',
-    '**/target/**',
-    '**/*.min.js',
-    '**/*.bundle.js',
-    '**/Pods/**',
-    '**/.gradle/**',
+    '**/out/**',
     '**/bin/**',
     '**/obj/**',
+    '**/target/**',
+
+    // JavaScript/TypeScript
+    '**/*.min.js',
+    '**/*.bundle.js',
+    '**/.next/**',
+    '**/.nuxt/**',
+    '**/.svelte-kit/**',
+    '**/.output/**',
+    '**/.turbo/**',
+    '**/.cache/**',
+    '**/.parcel-cache/**',
+    '**/.vite/**',
+    '**/.astro/**',
+    '**/.docusaurus/**',
+    '**/.gatsby/**',
+    '**/.webpack/**',
+    '**/.nx/**',
+    '**/.yarn/cache/**',
+    '**/.pnpm-store/**',
+    '**/storybook-static/**',
+
+    // React Native / Expo
+    '**/.expo/**',
+    '**/web-build/**',
+    '**/ios/Pods/**',
+    '**/ios/build/**',
+    '**/android/build/**',
+    '**/android/.gradle/**',
+
+    // Python
+    '**/__pycache__/**',
     '**/.venv/**',
     '**/venv/**',
+    '**/.pytest_cache/**',
+    '**/.mypy_cache/**',
+    '**/.ruff_cache/**',
+    '**/.tox/**',
+    '**/.nox/**',
+    '**/*.egg-info/**',
+    '**/.eggs/**',
+
+    // Go
+    '**/go/pkg/mod/**',
+
+    // Rust
+    '**/target/debug/**',
+    '**/target/release/**',
+
+    // Java/Kotlin/Gradle
+    '**/.gradle/**',
+    '**/.m2/**',
+    '**/generated-sources/**',
+    '**/.kotlin/**',
+
+    // C#/.NET
+    '**/.vs/**',
+    '**/.nuget/**',
+    '**/artifacts/**',
+    '**/publish/**',
+
+    // C/C++
+    '**/cmake-build-*/**',
+    '**/CMakeFiles/**',
+    '**/bazel-*/**',
+    '**/vcpkg_installed/**',
+    '**/.conan/**',
+    '**/Debug/**',
+    '**/Release/**',
+    '**/x64/**',
+
+    // Swift/iOS/Xcode
+    '**/DerivedData/**',
+    '**/.build/**',
+    '**/.swiftpm/**',
+    '**/xcuserdata/**',
+    '**/Carthage/Build/**',
+    '**/SourcePackages/**',
+
+    // PHP
+    '**/.composer/**',
+    '**/storage/framework/**',
+    '**/bootstrap/cache/**',
+
+    // Ruby
+    '**/.bundle/**',
+    '**/tmp/cache/**',
+    '**/public/assets/**',
+    '**/public/packs/**',
+    '**/.yardoc/**',
+
+    // Testing/Coverage
+    '**/coverage/**',
+    '**/htmlcov/**',
+    '**/.nyc_output/**',
+    '**/test-results/**',
+    '**/.coverage/**',
+
+    // IDE/Editor
+    '**/.idea/**',
+
+    // Logs and temp
+    '**/logs/**',
+    '**/tmp/**',
+    '**/temp/**',
+
+    // Documentation build output
+    '**/_build/**',
+    '**/docs/_build/**',
+    '**/site/**',
   ],
   languages: [],
   frameworks: [],