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roadmap: #203 filed — AutoCompactionEvent summary-only, no SSE event emitted mid-turn when auto-compaction fires (Jobdori cycle #136)

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YeonGyu-Kim 2026-04-25 07:48:22 +09:00
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@ -12380,3 +12380,42 @@ grep -rE 'kind:.*=' src/ | grep -v test | wc -l
**Status:** Open. No code changed. Filed 2026-04-25 06:09 KST. Branch: feat/jobdori-168c-emission-routing. HEAD: 5e0228d.
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---
## Pinpoint #203 — `AutoCompactionEvent` is summary-only: no streaming SSE event emitted when auto-compaction fires mid-turn (Jobdori, cycle #136)
**Observed:** In `rust/crates/runtime/src/conversation.rs`, `maybe_auto_compact()` (line ~555) fires compaction between turns and returns an `AutoCompactionEvent { removed_message_count }`. This event is attached to `TurnSummary.auto_compaction` and only surfaces in the post-turn struct returned by `run_turn()`. It is not emitted as a streaming SSE event at the moment compaction occurs.
**Gap:**
- A claw monitoring the SSE stream during a long multi-turn session cannot detect that compaction fired until the final `TurnSummary` JSON arrives (or, in JSON output mode, until the CLI prints the final response envelope)
- Between compaction firing and the final summary, the session history has already been truncated — any mid-turn state the claw was tracking against the old history is now stale
- No `session_compacted` or `auto_compaction` SSE event exists; the classifier's event taxonomy has no entry for it
- `claw doctor` cannot surface "this session has been auto-compacted N times" or "compaction removed M messages in the last turn"
- Claws relying on replay-by-session-history for context reconstruction silently receive a shorter history with no notification
**Repro:**
```
# Run a session long enough to trigger auto-compaction
# Monitor the SSE stream during the turn
# Observe: no event with kind=session_compacted or similar appears in the stream
# The only signal is the post-turn auto_compaction field in the JSON summary
# If running in interactive TUI mode, the only signal is the printed compaction notice
```
**Expected:**
- When `maybe_auto_compact()` removes messages, emit a streaming SSE event immediately: `{ "kind": "session_compacted", "removed_message_count": N, "retained_message_count": M, "trigger": "auto" }`
- `claw doctor` surfaces sessions with auto-compaction history and message counts
- Classifier recognizes `session_compacted` as a first-class event kind
- `/compact` manual command similarly emits this event (currently only prints a user-facing string)
**Fix sketch:**
1. Add `session_compacted` to the `StreamEvent` enum (or as a diagnostic event channel alongside it)
2. In `maybe_auto_compact()`, after compaction, push `session_compacted` event through the event channel before continuing the turn
3. Expose count in the event: `{ kind: "session_compacted", removed_message_count: N }`
4. Wire manual `/compact` command to emit the same event
5. Add to classifier event taxonomy and `claw doctor` output
**Status:** Open. No code changed. Filed 2026-04-25 07:47 KST. Branch: feat/jobdori-168c-emission-routing. HEAD: 0730183.
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