Dragan Spiridonov 2086bafa6b feat(parsers): add web-tree-sitter WASM for Python, Java, C#, Rust, Swift (#323) ...

Integrate tree-sitter WASM as the default parser for 5 languages, replacing
regex-only parsing (~97-98%) with AST-based parsing (~100% accuracy).

- Add TreeSitterWASMParser implementing ILanguageParser for 5 languages
- Bundle only needed WASM grammars in assets/grammars/ (8.5MB vs 50MB)
- Add FallbackParser with 3-retry logic before permanent regex degradation
- Add per-call parser instances to prevent concurrency races across await
- Add cyclomatic complexity computation from AST branching nodes
- Add property extraction from class/struct AST nodes
- Add AQE_PARSER_REGEX_ONLY=1 env var for opt-out to regex
- Replace require() with ESM-compatible dynamic import() in registry
- Mark web-tree-sitter as external in CLI/MCP esbuild configs
- Amend ADR-076 with decision rationale and alternatives evaluated

Alternatives evaluated and rejected:
- @ast-grep/napi: npm package only ships JS/TS/CSS/HTML, others need native .so
- node-tree-sitter: requires native C compilation via node-gyp

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-24 12:43:14 +00:00

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