codegraph: Command for Claude Code

Usage

/dead-code [path_prefix]

Scope defaults to codegraph/codegraph/ if no prefix is given. Pass any string that matches a :File.path prefix to scope elsewhere (e.g. packages/twenty-server/src/engine/).

Returns four categories of orphan, each tagged with a kind column so you can scan them together:

What this does

PREFIX="${ARGUMENTS:-codegraph/codegraph/}"

codegraph query "
MATCH (f:Function)
WHERE f.file STARTS WITH '$PREFIX'
  AND NOT EXISTS { ()-[:CALLS]->(f) }
  AND NOT EXISTS { ()-[:RENDERS]->(f) }
  AND NOT EXISTS { (f)-[:DECORATED_BY]->(:Decorator) }
RETURN 'orphan_function' AS kind, f.name AS name, f.file AS file
UNION ALL
MATCH (c:Class)
WHERE c.file STARTS WITH '$PREFIX'
  AND NOT EXISTS { ()-[:EXTENDS]->(c) }
  AND NOT EXISTS { ()-[:INJECTS]->(c) }
  AND NOT EXISTS { ()-[:RESOLVES]->(c) }
  AND NOT EXISTS { (:File)-[:IMPORTS_SYMBOL {symbol: c.name}]->(:File) }
RETURN 'orphan_class' AS kind, c.name AS name, c.file AS file
UNION ALL
MATCH (a:Atom)
WHERE a.file STARTS WITH '$PREFIX'
  AND NOT EXISTS { ()-[:READS_ATOM]->(a) }
  AND NOT EXISTS { ()-[:WRITES_ATOM]->(a) }
RETURN 'orphan_atom' AS kind, a.name AS name, a.file AS file
UNION ALL
MATCH (e:Endpoint)
WHERE e.file STARTS WITH '$PREFIX'
  AND NOT EXISTS { (:Method)-[:HANDLES]->(e) }
RETURN 'orphan_endpoint' AS kind, (e.method + ' ' + e.path) AS name, e.file AS file
ORDER BY kind, file, name
LIMIT 100
"

Caveats

• Decorator exclusion is load-bearing. Without the DECORATED_BY filter, every @mcp.tool(), @app.command(), @pytest.fixture, @staticmethod function shows up as "orphan" because framework dispatchers invoke them via reflection. Keep the filter even if it occasionally hides a genuinely-dead decorated function.
• Python module-level callers aren't tracked. The Python parser doesn't emit CALLS from top-level code (Stage 1 limitation — resolver's Phase 4 requires a method-scoped caller). So a Python function called only from module-level if __name__ == "__main__": blocks will appear as orphan. Spot-check before deleting.
• Interface / Protocol implementations. A class that only "satisfies" a duck-typed protocol (no EXTENDS edge, no explicit import) will show as orphan_class. For abstract-base-class compliance, use /graph "MATCH (c:Class {name:'Foo'})-[:EXTENDS]->(p:Class) RETURN p" to double-check.
• 100-row limit. Raise it for exhaustive cleanup passes.