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Harden Epiphany promotion state replacements

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Meta Vens 2026-04-24 19:07:08 +01:00
commit bb557d1484
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notes/epiphany-current-algorithmic-map.md
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@ -699,13 +699,15 @@ The app-server handler:
7. calls `CodexThread.epiphany_update_state`.
8. returns the updated `EpiphanyThreadState`.
`evaluate_promotion` currently enforces a deliberately small policy:
`evaluate_promotion` currently enforces a deliberately small but now map-aware policy:
1. the patch must contain at least one mutation.
2. verifier evidence must have nonempty id/kind/status/summary.
3. verifier status must be accepting: `ok`, `accepted`, `verified`, `pass`, or `passed`.
4. patch evidence records must be nonempty and unique by id.
5. observations must be nonempty, unique by id, and cite existing evidence ids.
6. state replacement patches, including map/frontier/checkpoint/churn edits, must include at least one explicit observation and at least one patch evidence record.
7. subgoal, invariant, graph, frontier, checkpoint, and churn replacements get lightweight structural validation before they can reach the durable update path.
Code refs:
@ -714,6 +716,7 @@ Code refs:
- [codex_message_processor.rs](E:/Projects/EpiphanyAgent/vendor/codex/codex-rs/app-server/src/codex_message_processor.rs:4280)
- [codex_message_processor.rs](E:/Projects/EpiphanyAgent/vendor/codex/codex-rs/app-server/src/codex_message_processor.rs:4308)
- [epiphany-core/src/promotion.rs](E:/Projects/EpiphanyAgent/epiphany-core/src/promotion.rs:19)
- [epiphany-core/src/promotion.rs](E:/Projects/EpiphanyAgent/epiphany-core/src/promotion.rs:122)
### Output
@ -758,9 +761,9 @@ model/tool observations
-> durable evidence/map/churn mutation
```
That remaining missing organ is richer map/churn promotion. The typed write path exists, the first deterministic distillation proposal path exists, and the first verifier-backed promotion gate exists. What does not exist yet is a policy that turns accepted observations into graph/frontier/churn edits without drifting into automatic graph fanfic.
That remaining missing organ is richer map/churn promotion. The typed write path exists, the first deterministic distillation proposal path exists, and the first verifier-backed promotion gate exists. The first map/churn safety layer now exists too: promotion can reject state replacement patches that are not tied to explicit observations/evidence or that contain structurally broken subgoal, invariant, graph, frontier, checkpoint, or churn fields.
In natural language: current Epiphany can preserve a map, show a map, retrieve evidence for the map, draft one explicit observation/evidence patch, reject or accept a verified candidate, and apply explicit map/evidence/churn edits. It still cannot safely derive richer map/churn edits from observations by itself. Teeth are installed; chewing is still supervised.
In natural language: current Epiphany can preserve a map, show a map, retrieve evidence for the map, draft one explicit observation/evidence patch, reject or accept a verified candidate, apply explicit map/evidence/churn edits, and sanity-check those edits before they hit the ledger. It still does not derive graph edits by itself. Teeth are installed; chewing is still supervised.
## Verification Hooks
@ -771,6 +774,7 @@ Current tests cover the landed flows at useful seams:
- explicit out-of-band Epiphany snapshot replay before the first user turn.
- deterministic observation/evidence distillation in `epiphany-core`.
- verifier-backed promotion policy in `epiphany-core`.
- map/churn promotion validation for evidence-backed state replacements in `epiphany-core`.
- typed state-update patch application in `codex-core`.
- retrieval ranking, fallback, stale manifest detection, and mocked Qdrant/Ollama indexing in `epiphany-core`.
- app-server protocol serde for `thread/epiphany/retrieve`, `thread/epiphany/index`, `thread/epiphany/distill`, `thread/epiphany/promote`, and `thread/epiphany/update`.