Build or refresh the local regex index for a workspace and return the active base revision plus overlay state.

Describe the active regex index for a workspace, including corpus selection, freshness, and storage paths, without rebuilding it.

Delete cached index data for a workspace. Use this only to recover from stale or corrupt local index state.

Find exact text in indexed workspace files. Prefer this over regex when you already know the exact string.

Find ECMAScript regular-expression matches in indexed workspace files using sparse n-gram pruning before deterministic verification.

Plan the MCP-first search workflow for an exploratory objective and recommend whether to ensure the index, use literal search, explain a regex, or run regex search.

Explain how the server will decompose a query, what anchors it can extract, and whether the search will fall back to a full scan.

Show the trigrams or sparse n-grams that would be emitted for a file or text snippet, including offsets and rarity weights.