# core/journal — AGENTS.md

## Purpose

Decision journal: projects orchestration events into a structured `DecisionJournalState` (a chronological log of `DecisionRecord`s), renders it for human review, and provides a `ProjectMemoryDistiller` that condenses journal entries into cross-session memory.

## Ownership

CORREX kernel team.

## Local Contracts

- `DecisionRecord` — single journal entry: decision point, rationale, outcome.
- `DecisionJournalState` rebuilt from `JournalCompactedEvent` and orchestration events via `DefaultDecisionJournalReducer` + `DecisionJournalProjector`.
- `DefaultDecisionJournalRepository` wraps `EventReplayer<DecisionJournalState>`.
- `DecisionJournalRenderer` — formats `DecisionJournalState` as human-readable text for context injection or export.
- `ProjectMemoryDistiller` — produces a condensed memory summary from journal state; output is non-authoritative (Hard Invariant #6 applies — compressed output must not replace original events).

## Work Guidance

- Follow the standard Events→State→Reducer→Projector→Repository pattern (see `core/AGENTS.md`).
- `DefaultDecisionJournalReducer` only does `state.copy(...)`.
- Distilled memory is a derived view; the event log remains the source of truth.

## Verification

```bash
./gradlew :core:journal:test --rerun-tasks
```

Tests in `testing/projections/` (DecisionJournalProjectorTest) and `testing/replay/` (DecisionJournalReplayTest).

## Child DOX Index

No child AGENTS.md (leaf module).