feat: qwen-code platform + Objective-C + Bash parser support

[tirth8205]

Summary

Three feature-request closeouts from the post-v2.2.4 audit:

• 支持 qwen-code吗 #83 — Qwen Code as an install platform (--platform qwen writes ~/.qwen/settings.json using the same mcpServers schema as Cursor/Windsurf).
• Could you add support for Objective-C? #88 — Objective-C parser (.m files) — classes, instance + class methods, [message expression] calls, C-style main(), and #import/#include.
• Support Bash/Shell (.sh) parsing for script-heavy repositories #197 — Bash/Shell parser (.sh, .bash, .zsh) — functions, command invocations as CALLS, and source/. as IMPORTS_FROM with path resolution.

Both languages already have grammars in tree-sitter-language-pack, so no new runtime dependencies.

Commits

1. fd56a3c feat: add qwen-code as a supported MCP install platform (支持 qwen-code吗 #83)

   • New PLATFORMS["qwen"] entry in code_review_graph/skills.py with config_path = ~/.qwen/settings.json, key = "mcpServers", format = "object", needs_type = True.
   • Added qwen to the --platform choices in cli.py for both install and init.
   • Uses the existing object-format merge path — no new install logic.
   • Tests: test_install_qwen_config, test_install_qwen_preserves_existing_servers.

2. b1fbcd5 feat: add Objective-C and Bash/Shell parser support (Could you add support for Objective-C? #88, Support Bash/Shell (.sh) parsing for script-heavy repositories #197)

   • Objective-C (.m → objc):
     • Class types: class_interface, class_implementation, category_interface, protocol_declaration
     • Function types: method_definition + C-style function_definition
     • Imports: preproc_include (#import and #include both)
     • Calls: message_expression + call_expression
     • _get_name now recognizes method_definition (first identifier = method name, e.g. add:to: keeps add) and threads objc into the existing C/C++ function_declarator path so top-level main() is picked up.
     • _get_call_name handles message_expression by skipping the [, skipping the receiver, and returning the next identifier — works for simple calls, multi-part selectors, and chained [[... alloc] init].
     • Note: .h stays mapped to c (Obj-C .h disambiguation is a separate can of worms), .mm stays mapped to cpp for now.
   • Bash (.sh / .bash / .zsh → bash):
     • Function type: function_definition (name is a word child — added to _get_name)
     • Calls: every command node; _get_call_name returns the command_name text
     • Imports: new _extract_bash_source_command() hook in _extract_from_tree detects source path / . path, strips quotes, and emits IMPORTS_FROM edges; _do_resolve_module has a new bash branch that resolves relative paths against the caller's directory when the target file exists on disk
     • No classes (shell has none)

Verified end-to-end on fixtures

tests/fixtures/sample.m (Calculator with @interface + @implementation + C main):

• 8 nodes, 18 edges
• 5 functions: add, reset, logResult, sharedCalculator (all with parent_name="Calculator"), and main (top-level)
• 2 IMPORTS_FROM: Foundation/Foundation.h, Logger.h
• 9 CALLS including [self logResult:sum] → ::Calculator.logResult (resolved), [Calculator sharedCalculator] → ::Calculator.sharedCalculator, plus NSLog, alloc, init

tests/fixtures/sample.sh (sample script with source, 5 functions, and nested calls):

• 6 nodes, 18 edges
• 5 functions: log_info, log_error, ensure_dir, cleanup, main
• 2 IMPORTS_FROM: sample_lib.sh resolved to absolute path (file exists), sample_config.sh kept as raw string
• 11 CALLS — internal calls like main → log_info / ensure_dir / cleanup resolved to qualified names; external commands (echo, mkdir, rm) kept as bare names

Test plan

• uv run ruff check code_review_graph/ → clean
• uv run mypy code_review_graph/ --ignore-missing-imports --no-strict-optional → clean
• uv run bandit -r code_review_graph/ -c pyproject.toml → 0 H/M/L
• uv run pytest --cov-fail-under=65 → 717 passed, 1 skipped, 2 xpassed, coverage 74.84%
  • 16 new tests total: 2 qwen platform install tests, 7 Objective-C, 7 Bash
• CI matrix (3.10 / 3.11 / 3.12 / 3.13)

Closes

• 支持 qwen-code吗 #83 (qwen-code)
• Could you add support for Objective-C? #88 (Objective-C)
• Support Bash/Shell (.sh) parsing for script-heavy repositories #197 (Bash/Shell)

Out of scope for this PR — from the same audit

• Support for elixir #112 Elixir — volunteer @hk151109 said they'd raise a PR this weekend. If no PR lands in 1-2 weeks, I'll implement.
• apply_refactor_tool writes to files with no dry-run or confirmation step #176 apply_refactor dry-run — volunteer @VaibhavDangaich committed to implement. Same policy.
• install silently rewrites CLAUDE.md / platform rules without preview #173 install CLAUDE.md preview — PR feat: preview and confirm before injecting instructions into CLAUDE.md #204 is already open.
• No warning before cloud embeddings send codebase to external APIs #174 cloud embeddings warning — PR Add user confirmation before sending code to external embedding APIs isuue #174 #179 is already open (overlaps with feat: add CRG_DATA_DIR and CRG_REPO_ROOT env vars for zero-artifact #207).
• Move Directory .code-review-graph into subdirectory #155 configurable DB location — PR feat: add CRG_DATA_DIR and CRG_REPO_ROOT env vars for zero-artifact #207 is open but has review comments.
• feat: Add support for DevOps languages (Terraform/HCL and Helm Charts) #199 Terraform/HCL + Helm — HCL is M-sized and needs a design call (call-graph model doesn't map onto infra DAGs); Helm is L. Deferring.
• [Optimization] Implement TOON Parser for Graph Serialization #210 TOON serialization — you already declined this on-issue; deferring.
• .code-review-ignore #211 .code-review-ignore — closed as already-implemented (.code-review-graphignore has been working since before v2.2.3).

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