code_search

In one sentence

code_search lets the AI grep code quickly—lighter and faster than unified_search.code_search, tuned for:

scope	Finds	Backend
`scope="sandbox"`	Code temporarily downloaded/generated in the current session sandbox	ripgrep + ast-grep
`scope="kb"`	Zero/light-index code in the KB (no need to wait for heavy indexing)	ripgrep + ast-grep over local cache

Heavy-index code features (trigram, cross-repo navigate, vector semantic) use unified_search.code_search. code_search does not cover those.

Scenario	Tool
AI just cloned a repo to sandbox and needs a fast lookup	`code_search(scope="sandbox")`
KB attached a zero/light code KB; text/AST grep	`code_search(scope="kb", kb_ids=[...])`
Cross-repo “who calls this function” needs the semantic graph	`unified_search.code_search(mode="navigate")`
Natural language code search needs vectors	`unified_search.code_search(mode="semantic")`

mode	Engine	Best for
`text`	ripgrep	Literals, regex, filenames
`ast`	ast-grep	Structural queries (“every try/except without logging”)