Search, capture, and query the claude-code-plugins knowledge graph. Use when asked to "capture this", "add this to the graph", "what do we know about X", "update the graph", "check the graph for X", or when a decision, pattern, or non-obvious fact surfaces mid-session that's worth recording. Also: "log an observation", "what patterns do we have about skill triggering", "any decisions on the knowledge-commons plugin", "what do we know about the commit-creator agent".