feat(mcp): add dev_refs tool for call graph queries #83
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…king Add types to support call graph extraction: - CallerInfo: name, file, line for functions that call this component - CalleeInfo: name, file (optional), line for functions this component calls - Add callees field to DocumentMetadata - Export new types from scanner module - Update document preparation to include callees Note: Callers are computed at query time via reverse lookup of callees. Part of #80
Use ts-morph to extract call relationships during scanning: - extractCallees() finds all CallExpression nodes within a function/method - extractCalleeFromExpression() extracts name, line, and resolved file path - Handles: function calls, method calls, chained calls, constructor calls - Deduplicates by name+line to avoid repeated calls - Resolves file paths via symbol lookup (excludes node_modules) - Only populates callees field when calls exist Part of #80
Create RefsAdapter that provides the dev_refs MCP tool: - Query callees (what a function calls) - Query callers (what calls a function) - Query both directions at once - Format output as readable markdown - Find best match for function name via semantic search - Compute callers by reverse lookup through indexed callees Also adds: - startTimer() utility for measuring operation duration - Uses estimateTokensForText for accurate token counting Registered in MCP server alongside existing adapters. Part of #80
Scanner tests: - Extract callees from functions - Extract callees from methods - Include line numbers for callees - No callees for interfaces/type aliases - Deduplicate callees at same line - Handle method calls on objects RefsAdapter tests: - Tool definition validation - Input validation (name, direction, limit) - Callee queries - Caller queries (reverse lookup) - Bidirectional queries - Output formatting (markdown, tokens, duration) - Not found handling - Token estimation Utility tests: - startTimer() elapsed time - Multiple elapsed() calls - Immediate elapsed check All 1320 tests passing. Part of #80
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Summary
Implements #80 - Relationship Queries (
dev_refs)Adds a new MCP tool that queries call relationships for functions and methods.
Changes
Core Types
CallerInfoandCalleeInfointerfaces toDocumentMetadatacalleesfield stores what a function/method callsScanner
extractCallees()extracts all call expressions from functions/methodsnew)MCP Adapter
dev_refstool with parameters:name: Function/method to querydirection:callees,callers, orboth(default)limit: Max results per directionestimateTokensForTextfor accurate token countingUtilities
startTimer()utility for measuring operation durationDate.now()pattern)Example Output
Testing
Closes #80