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.opencode/skills/gkg/references/language-support.md

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+# GKG Language Support
+
+## Support Matrix
+
+| Language | Definitions | Imports | Intra-file Refs | Cross-file Refs |
+|----------|-------------|---------|-----------------|-----------------|
+| Ruby | ✅ | ✅ | ✅ | ✅ |
+| Java | ✅ | ✅ | ✅ | ✅ |
+| Kotlin | ✅ | ✅ | ✅ | ✅ |
+| Python | ✅ | ✅ | ✅ | 🚧 |
+| TypeScript | ✅ | ✅ | ✅ | 🚧 |
+| JavaScript | ✅ | ✅ | ✅ | 🚧 |
+
+## Feature Definitions
+
+**Definitions**: Classes, functions, methods, constants, interfaces extracted from AST.
+
+**Imports**: Module/package imports tracked for dependency analysis.
+
+**Intra-file Refs**: References to symbols within same file.
+
+**Cross-file Refs**: References to symbols defined in other files. Critical for impact analysis.
+
+## Fully Supported (Ruby, Java, Kotlin)
+
+Complete semantic analysis:
+- Go-to-definition across files
+- Find all usages across codebase
+- Full dependency graph
+- Impact analysis for refactoring
+
+## Partially Supported (Python, TS/JS)
+
+Current capabilities:
+- Definition extraction works
+- Import tracking works
+- Same-file reference tracking works
+
+Limitations:
+- Cross-file `get_references` may miss some usages
+- `get_definition` may not resolve all external symbols
+- Use with awareness of gaps
+
+## Best Practices
+
+### For Full Support Languages
+Use all MCP tools confidently for complete analysis.
+
+### For Partial Support Languages
+1. Verify critical refactoring impacts manually
+2. Use `search_codebase_definitions` for discovery
+3. Cross-reference with `grep` for completeness
+4. Supplement with repomix for context dumps
+
+## Future Plans
+
+Cross-file reference support for Python/TS/JS under active development. Check [GitLab Knowledge Graph](https://gitlab.com/gitlab-org/rust/knowledge-graph) for updates.