**Timestamp:** 2026-05-26T17:13:07Z
**Focus:** Out-of-order backlog triage — heartbeat failures, model mismatch, stale actions, memory quality
**Session:** Direct ACP persistent-chat, 81 turns, GPT-5.4 (1.05M context), 431K tokens (41.1%)
---
This synthesis turn triages a ~31-hour backlog since the last scheduled synthesis (2026-05-25T10:11Z). Four critical issues demand immediate attention: **(1) the serving model is GPT-5.4 but the injected system prompt claims Kimi K2.6**, creating a dangerous identity mismatch; **(2) the model heartbeat (curation) is dead** — last successful curation was ~May 23, with acpx_rc=5 failures since; **(3) four consecutive operational synthesis runs failed today** (16:49–16:52Z) with "Internal error"; and **(4) semantic memory has accumulated ~30 garbage entries** containing raw prompt packet text rather than user facts. On the positive side: the session has been stable for 46+ hours without reload, context pressure is comfortable at 41%, and the memory-candidates pipeline is actually working again (160K bytes, up from 21K).
---
• **System prompt declares:** `kimi-for-coding/k2p6` (262K context)
• **Context guard reports:** `openai/gpt-5.4` (1.05M context)
• **Evidence:** `active_tokens=424,964` — impossible on Kimi's 262K window. `max_context=1,050,000` and `configured_model_context.model=openai/gpt-5.4` in context-guard.json.
• **Impact:** The assistant may incorrectly assume 262K limits, recommend reloads too early, or misreport model identity to the user. Curated memory (line 19) also incorrectly states "Current model: Kimi K2.6" with stale fallback text.
• **Root cause:** Session reload on 2026-05-24T19:23Z switched to GPT-5.4, but the system prompt packet injected at session start was not updated. The `opencode.json` config also still shows DeepSeek V4 Flash (per prior reports).
• **Last model-heartbeat.json:** 2026-05-26T16:49:02Z with `acpx_rc=5`, `action="fallback-no-change"`, `rc=0`.
• **Last successful curation:** 2026-05-23T15:22Z per curated-memory.md header (~3 days stale).
• **Fast heartbeat (memory-heartbeat):** Still running — ts=2026-05-26T17:13:10Z, entries=3777, candidates_size=159604.
• **Symptom:** The slow model heartbeat fails every run with ACPX error code 5. The curator journal has not been updated with real curation content since May 23. Maintenance turns still fire (visible in perpetual log), but they fail to produce curated output.
• **Prior history:** The heartbeat has had 6+ consecutive failures since May 25 09:29Z. Same bash permission issue was suspected, but the actual error is acpx_rc=5 (ACPX-level failure, not bash denial).
• **Four failures today:** 16:49Z, 16:50Z, 16:51Z, 16:52Z.
• **Error patterns:** "Internal error" (3x) and "expected report was not written" (1x).
• **This turn:** First successful synthesis in ~24 hours. The failures suggest the synthesis agent itself was wedged or the report-validation logic was rejecting reports.
---
| Action | Status | Reason |
|--------|--------|--------|
| **Investigate incomplete persistent-chat reload** | **STALE** | Reload-state.json shows last reload 2026-05-24T19:23Z was ok=True. No incomplete reloads since May 21. This action has been regenerated 6x in actions.jsonl (May 19→May 24) without resolution because the trigger (reload-state.json with ok=False) no longer exists. |
| **Prepare persistent-chat direct ACP reload handoff** | **RESOLVED** | Context-guard.json shows stage=normal, action=none. The handoff condition (stage=handoff at 216K/262K) from May 24 no longer applies. Session is at 431K/1.05M (41.1%) with no reload pressure. |
| **Investigate candidates pipeline gap** | **RESOLVED** | memory-candidates.jsonl grew from 21,033 bytes (May 17) to 159,604 bytes (May 26). semantic-candidates.jsonl is 246,132 bytes. Pipeline is working. |
| **Clean up stale memory candidates (May 11–14)** | **PARTIALLY RESOLVED** | The original 21 candidates from May 11–14 were reviewed and marked stale. However, 147 candidates now exist, many still in candidate status from May 18. New cleanup needed for the newer backlog. |
| Action | Priority | Age | Note |
|--------|----------|-----|------|
| **Design robust apply_patch primitive** | high | May 18 | GLM truncation incident motivation. Still relevant. |
| **Design early-stop detection for repetition/runaway** | low | May 18 | Still open, no progress. |
| **Add model profiles for subagents** | medium | May 18 | Still open, no progress. |
| **Test curated memory + prompts across models** | medium | May 18 | Still open. More urgent now given model switches. |
| **Safe agent patch workflow** | high | May 18 | Decision-state thread still active. Heartbeat script edit remains blocked. |
| **Add read namespace allow rule for state files** | low | May 16 | Still blocked by permission config. Non-fatal. |
1. **Fix model identity mismatch** — Update system prompt injection, curated-memory.md model line, and opencode.json to reflect actual serving model (GPT-5.4). Verify on next reload. *(priority: high)*
2. **Diagnose and fix model heartbeat acpx_rc=5 failure** — Inspect ACPX logs for the persistent-chat-model-heartbeat script. The error is not bash permission (rc=0) but ACPX session/model error. *(priority: high)*
3. **Audit and clean semantic-memory.json** — ~30 entries, majority are garbage (raw prompt packet text, assistant responses, turn metadata). Only 3-5 are actual user facts. Needs bulk demotion/deletion. *(priority: medium)*
4. **Review and mark 147 memory-candidates** — 147 entries in memory-candidates.jsonl, many from May 18–20 still in candidate status. Curator is not reviewing them. *(priority: medium)*
5. **Update decision-state.json** — Last updated May 19. Many threads outdated (DeepSeek V4 Flash switch, migration to direct ACP, prompt cache fix, etc.). *(priority: low)*
6. **Clean notices.jsonl** — 19 entries, includes obsolete context guards (May 24) and today's failed synthesis runs. Should be pruned. *(priority: low)*
---
• **File:** semantic-memory.json (507 lines, 31 explicit entries)
• **Quality assessment:** Most entries are corrupted or low-value:
- 55812 — locker code test from May 11 (valid but trivial)
- it-s-not-that-important-just-testing — test phrase from May 12
- Multiple entries contain raw turn packet metadata, assistant reasoning traces, or truncated conversation snippets (e.g., entries created May 18–20 with excerpt showing "Turn metadata: - room_id: ...")
- Several entries are just prompt injection artifacts from failed turns or queued messages
• **Conclusion:** The semantic memory is not functioning as a high-precision fact store. It has become a dumping ground for prompt packet fragments. The heartbeat's candidate promotion logic is broken or absent.
• **memory-candidates.jsonl:** 159,604 bytes, 147 entries (up from 21 entries / 21K bytes on May 17)
• **semantic-candidates.jsonl:** 246,132 bytes, 39 visible stale entries + newer ones
• **Flow:** Candidates are being generated again (regex update on May 18 helped), but curation/promotion is not keeping up. Only ~10 entries have been reviewed (marked stale or ignored). The rest sit in `candidate` status.
• **Last curated:** 2026-05-23T15:22Z (~3 days ago)
• **Header line still claims:** "Current model: Kimi K2.6" — incorrect.
• **Size:** 187 lines, within target.
• **Missing updates:** GPT-5.4 switch (May 24), direct ACP stability (no reloads in 46h), synthesis failures, semantic memory corruption.
---
• **Last reload:** 2026-05-24T19:23:31Z (46.8 hours ago)
• **Session label:** persistent-chat (direct ACP)
• **Backend session:** ses_1a4838151ffe2RE9g5hXeQ8xwX
• **Turns:** 81
• **Status:** Stable. No user-facing errors, no reloads, no watchdog events since May 24.
• **Provider total tokens:** 431,620
• **Max context:** 1,050,000 (GPT-5.4)
• **Context percent:** 41.1%
• **Usable percent:** 46.8%
• **Stage:** `normal` — no warn/handoff/reset pressure.
• **Latest user turn:** 2026-05-26T16:04:54Z (over 1 hour ago). Since then, only maintenance turns.
• **Recent jobs:** 3 failed subagents on May 24 (rc=124, timeout) for matrix-lite-chat. No persistent-chat subagents since May 21.
• **No running subagents.**
• **No pending timers.**
---
| Blocker | Severity | Detail |
|---------|----------|--------|
| **Model heartbeat acpx_rc=5** | high | Slow curation completely non-functional. Needs ACPX log inspection. |
| **System prompt model identity wrong** | high | Assistant believes it is Kimi K2.6; actually GPT-5.4. |
| **opencode.json config stale** | medium | Still shows DeepSeek V4 Flash (per May 21 report). Should show GPT-5.4. |
| **Semantic memory garbage accumulation** | medium | No cleanup mechanism; entries grow unbounded. |
| **Curated memory 3 days stale** | medium | No successful curation since May 23. |
| **Synthesis report-validation hardening** | medium | 4 failures today suggest validation logic is too strict or race-prone. |
| **Bash read deny for state files** | low | Read tool denied for /home/matrix-lite/state/*.jsonl. Workaround: use Read file tool. |
| **Permission for script edits** | low | /home/matrix-lite/app/scripts/ still blocked for edits. Heartbeat script fixes require manual user action. |
---
1. **Immediate (next user interaction):** Tell the user the system prompt model identity is wrong and confirm whether the current model (GPT-5.4) is intentional. Update curated-memory.md model line regardless.
2. **This week:** Investigate why model heartbeat returns acpx_rc=5. Check ACPX session logs for persistent-chat-model-heartbeat label. The fast heartbeat works; the slow one does not — this points to a model/config issue in the heartbeat script's ACPX invocation.
3. **This week:** Propose a semantic-memory.json cleanup — either via a helper script or a manual audit turn. The current 31-entry dump should be reduced to ~5 actual facts.
4. **Ongoing:** The synthesis agent should prune its own notices.jsonl on success — remove obsolete entries older than 7 days or resolved context guards.
---
*Report generated by operational synthesis worker. Not user-facing unless summarized by main agent.*