MCP Tools Overview

repobrain exposes 12 MCP tools to Claude. 8 improve on repowise's tools; 4 are entirely new.

All Tools

Tool	New?	Description
explain_file	—	File documentation with RAG-injected dependency context
explain_symbol	—	Symbol-level explanation (class, function, variable)
get_hotspots	—	Temporal decay–weighted churn hotspots
get_ownership	—	Temporal-weighted file ownership by contributor
get_dependencies	—	Import graph with dynamic hint edges included
get_architectural_decisions	—	ADR search and retrieval
search_codebase	—	Semantic vector search across all files
get_cochange_patterns	—	Temporal co-change analysis between files
get_pr_impact	NEW	Full blast radius for a PR
get_knowledge_map	NEW	Knowledge silos, bus factor, onboarding targets
get_test_gaps	NEW	Untested code ranked by risk score
get_security_hotspots	NEW	Auth/input/SQL risk surfaces

Key Improvements Over repowise

RAG-Aware Documentation

Every explain_file call now fetches existing documentation for all dependency files from LanceDB before calling the LLM. This means: - Generated docs reference what dependencies actually do - Cross-file relationships are accurately described - No more context-free docs that ignore imports

Temporal Hotspots

get_hotspots uses exponential decay scoring: files changed frequently recently rank higher than files with high historical churn but no recent activity.

Dynamic Import Edges

get_dependencies includes edges discovered by: - DjangoDynamicHints — INSTALLED_APPS, ROOT_URLCONF, middleware - PytestDynamicHints — conftest.py fixture usage - NodeDynamicHints — package.json main, webpack aliases