Free
Testing & security
Review Changes
Review code changes using detected modifications and their effects on dependent code.
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Codebase Understanding Skills for Claude Code, Codex & AI Agents
These skills help an agent learn an unfamiliar codebase before editing it. They cover structural code search, dependency and call graphs, change impact analysis and packing a repo into context.
23 skillsExplore Codebase Understanding skills
10 skillsFree
Research & data
Build Review Graph
Build and incrementally update the dependency graph used by code-review-graph.
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Free
Development & APIs
Graph Guided Debugging
Use a repository knowledge graph to locate relevant code and investigate reported issues.
32.7KStars3KForks
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Free
Development & APIs
Repomix Explorer
Pack local or remote repositories with Repomix, then inspect structure, patterns, and token usage.
29.2KStars1.6KForks
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yamadashy
Trace real triggers, call chains, payloads and state changes into compact ASCII flow diagrams.
24.6KStars2.1KForks
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Skills & MCP
Trail Code Graft Context
Use Trail Code's graft index to inspect repository structure, relevant context and change impact.
11.2KStars1KForks
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trailhq
Analyze a repository’s structure, documentation, dependencies and contribution patterns.
229Stars36Forks
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Use ast-grep for structural code search and compact source outlines.
904Stars37Forks
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Free
Development & APIs
Graph Guided Refactoring
Plan refactoring with dependency relationships and change impact analysis.
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tirth8205
Free
Research & data
Explore Codebase
Explore repository structure, symbols, and dependencies through the code review knowledge graph.
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Related topics
How to choose Codebase Understanding skills
Use ast-grep or graph skills to answer specific questions, impact analysis before a risky change, and repo packing when you need the whole project in context.
- Answer questions about an unfamiliar repo
- Estimate the impact of a change
- Search code by structure, not text