{"version":"2.1.228","anchor":"subagents-doing-delegated-observation-no-longer-trigger-comp","canonical_anchor":"subagents-doing-delegated-observation-no-longer-trigger-comp","heading":"Subagents doing delegated observation no longer trigger compact hooks","tier":"notice","area":"Hooks","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.228\/e\/subagents-doing-delegated-observation-no-longer-trigger-comp","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.228","markdown":"### Subagents doing delegated observation no longer trigger compact hooks\n\nObservation subagents no longer fire your PostCompact hooks when they compact.\n\n**What**\n\nWhen a subagent set up for delegated observation compacts its context, your `PostCompact` hooks are skipped and `PreCompact` hook output is limited to whether compaction was blocked. Compaction in the main session and in ordinary subagents runs hooks as before.\n\n**Details**\n\n- `PostCompact` returns immediately for these agents.\n- `PreCompact` still runs, but any custom instructions or user-facing message the hook returns are discarded.\n\n**Evidence**\n\n`hook_event_name: \"PostCompact\"`\n\n- Area: Hooks\n- Names: `PostCompact`, `PreCompact`\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 3\/5"}