feat: manifest-aware modules, export granularity, and robustness fixes

[corvid-agent]

Summary

Addresses agent testing feedback from v2.2.0 deployment. Major improvements to module detection, export control, and cross-language support.

New features

• Manifest-aware module detection — parses Package.swift, Cargo.toml, build.gradle.kts, package.json, pubspec.yaml, go.mod, and pyproject.toml to auto-discover targets, source paths, and dependencies instead of just scanning directories
• Export granularity control — new exportLevel config option ("type" vs "member") so you can document at the type level (class/struct/enum) rather than listing every stored property and init
• Configurable module definitions — new modules section in specsync.json to define module groupings directly with custom file lists
• Language-specific spec templates — generate and --fix now produce Swift, Rust, Kotlin/Java, Go, and Python templates with appropriate section headers and table columns

Fixes

• Test file detection — expanded Swift patterns (Spec, Mock, Stub, Fake), added Kotlin/Java/C# patterns, and detect well-known test directories (Tests/, __tests__/, spec/, mocks/, etc.)
• Check command no longer hangs on empty specs — returns clean JSON/exit when --fix is used with no spec files
• Exit code 101 panic → friendly error — wraps main in catch_unwind, converts panics to actionable error messages with bug report link
• AI context boundaries — generation prompt now instructs the provider to only document symbols from the module's own files, not imported dependencies

Config additions

{
  "exportLevel": "type",
  "modules": {
    "auth": { "files": ["src/auth/service.swift", "src/auth/models.swift"] },
    "networking": { "files": ["src/net/"] }
  }
}

Test plan

• All 136 tests pass (62 unit + 74 integration)
• Clippy clean, cargo fmt clean
• New manifest parser tests (Cargo.toml, Package.swift, package.json workspaces, go.mod)
• Agent re-test with Swift project using exportLevel: "type" and manifest detection

🤖 Generated with Claude Code