docs: update CLAUDE.md language list (11 → 35) and test structure (#889)

* docs: update CLAUDE.md language list and test structure

- Expand supported languages from 11 to 35 to match LANGUAGE_REGISTRY
- Add note pointing to domain/parser.ts as the source of truth
- Document benchmarks/resolution/ tree (fixtures, tracers, benchmark test)

* fix: correct language count from 35 to 23 and fixture count to 34 (#889)

The language list claimed 35 but LANGUAGE_REGISTRY has 23 entries.
12 languages (F#, Gleam, Clojure, etc.) were listed but don't exist
in the registry or codebase. Benchmark fixtures count is 34, not 35.

Author: carlos-alm

CLAUDE.md

@@ -56,7 +56,7 @@ Skip the above commands for non-code files, trivial edits, or when you already h
 
 Codegraph (`@optave/codegraph`) is a local code dependency graph CLI. It parses codebases with tree-sitter (WASM), builds function-level dependency graphs stored in SQLite, and supports semantic search with local embeddings. No cloud services required.
 
-**Languages supported:** JavaScript, TypeScript, TSX, Python, Go, Rust, Java, C#, PHP, Ruby, Terraform/HCL
+**Languages supported (23):** JavaScript, TypeScript, TSX, Python, Go, Rust, Java, C#, Ruby, PHP, C, C++, Kotlin, Swift, Scala, Bash, Elixir, Lua, Dart, Zig, Haskell, OCaml, Terraform/HCL. `LANGUAGE_REGISTRY` in `domain/parser.ts` is the single source of truth — check there for the current list.
 
 ## Commands
 
@@ -171,7 +171,14 @@ tests/
 ├── graph/                # Cycle detection, DOT/Mermaid export
 ├── parsers/              # Language parser extraction
 ├── search/               # Semantic search + embeddings
-└── fixtures/sample-project/  # ES module fixture (math.js, utils.js, index.js)
+├── fixtures/sample-project/  # ES module fixture (math.js, utils.js, index.js)
+└── benchmarks/resolution/
+    ├── resolution-benchmark.test.ts   # Static resolution precision/recall vs expected-edges manifests
+    ├── fixtures/<lang>/       # Hand-annotated fixture projects (34 languages) with expected-edges.json
+    └── tracer/                # Dynamic call tracers — per-language runtime instrumentation
+        ├── loader-hook.mjs    #   ESM loader hook (JS/TS): @babel/parser AST → position-based instrumentation
+        ├── run-tracer.mjs     #   CLI: imports entry module, calls exports, dumps edges as JSON
+        └── <lang>-tracer.*    #   Language-specific tracers (python-tracer.py, ruby-tracer.rb, etc.)
 ```
 
 Integration tests create a temp copy of the fixture project for isolation.