SessionEnd hooks skipped on /clear and /compact — learnings lost

[qozle]

Problem

/clear and /compact destroy conversation context but don't trigger SessionEnd. This means:

• WorkCompletionLearning never fires — work state, ISC progress, and session insights are lost
• RelationshipMemory never fires — interaction patterns from the session aren't captured
• Session progress isn't snapshotted — if the user continues in the same session, there's no record of what came before

/compact fires PostCompact, but that hook only re-injects state — it doesn't save anything.

Impact

Users who frequently use /clear (to start fresh mid-session) or /compact (to manage context) lose all the learning/relationship data that SessionEnd would have captured. The more actively someone manages their context, the more data they lose.

Proposed fix

A UserPromptSubmit hook that detects /clear and /compact in the prompt text and runs a lightweight harvest before the command executes:

1. Work completion learning — same as WorkCompletionLearning: capture work state, ISC progress
2. Relationship notes — same as RelationshipMemory: extract W/B/O notes from transcript
3. Progress snapshot — annotate active progress files with a context-reset marker
4. Rating signal flush — mark the reset point in ratings.jsonl so analysis knows context changed

The hook does NOT run cleanup (tab reset, state deletion) since the session continues after both commands.

Fast exit (<5ms) for all non-matching prompts — zero overhead on normal usage.