Create a node in the task graph. Use for every task, subtask, idea, discussion topic, note, finding (something learned), decision (with reasoning) or bug that comes up. If it grew out of another node, pass parent_id so the graph shows where it branched from.

Update a node's title, description or status, and/or append a timestamped note. Notes are for the node's own status trail (why blocked, what the fix was); standalone information worth keeping should be its own note node via create_node so it is visible in the graph.

Create a directed edge between two existing nodes to show logical flow.

Bulk-create many nodes and edges in one call. Use when reconstructing a graph from existing project history (e.g. context injected by a memory plugin such as claude-mem). Provide your own temporary ids in nodes[].ref and reference them in edges; real ids are assigned and returned as a ref->id map.

Return the full current graph (all nodes and edges). Use to re-orient yourself at the start of a session.

Delete a node and all edges touching it. Only when the user explicitly asks.