docs(ledger): R14 closure + live_sha bump to 2b86543 post-deploy

- Orientation: live_sha 2712c5d -> 2b86543 (verified via
  /health at 2026-04-23T15:20:53Z), test_count 547 -> 548,
  main_tip -> 2b86543, open_branches -> none
- Session Log: R14 close-out narrative (Codex no-findings,
  squash-merge 0989fed, deploy 2b86543 status=ok). V1-A gate
  status recap: density CLEARED (784 active), soak day 5/~7.

.gitignore

@@ -14,3 +14,8 @@ venv/
 .claude/*
 !.claude/commands/
 !.claude/commands/**
+
+# Editor / IDE state — user-specific, not project config
+.obsidian/
+.vscode/
+.idea/

DEV-LEDGER.md

@@ -6,23 +6,26 @@
 
 ## Orientation
 
-- **live_sha** (Dalidou `/health` build_sha): `775960c` (verified 2026-04-16 via /health, build_time 2026-04-16T17:59:30Z)
+- **live_sha** (Dalidou `/health` build_sha): `2b86543` (verified 2026-04-23T15:20:53Z post-R14 deploy; status=ok)
-- **last_updated**: 2026-04-18 by Claude (Phase 7A — Memory Consolidation "sleep cycle" V1 on branch, not yet deployed)
+- **last_updated**: 2026-04-23 by Claude (R14 squash-merged + deployed; Orientation refreshed)
-- **main_tip**: `999788b`
+- **main_tip**: `2b86543`
-- **test_count**: 533 (prior 521 + 12 new wikilink/redlink tests)
+- **test_count**: 548 (547 + 1 R14 regression test)
-- **harness**: `17/18 PASS` on live Dalidou (p04-constraints expects "Zerodur" — retrieval content gap, not regression)
+- **harness**: `17/18 PASS` on live Dalidou (p04-constraints expects "Zerodur" — known content gap, not regression; consistent since 2026-04-19)
 - **vectors**: 33,253
-- **active_memories**: 84 (31 project, 23 knowledge, 10 episodic, 8 adaptation, 7 preference, 5 identity)
+- **active_memories**: 784 (up from 84 pre-density-batch — density gate CRUSHED vs V1-A's 100-target)
-- **candidate_memories**: 2
+- **candidate_memories**: 2 (triage queue drained)
-- **interactions**: 234 total (192 claude-code, 38 openclaw, 4 test)
+- **interactions**: 500+ (limit=2000 query returned 500 — density batch has been running; actual may be higher, confirm via /stats next update)
 - **registered_projects**: atocore, p04-gigabit, p05-interferometer, p06-polisher, atomizer-v2, abb-space (aliased p08)
-- **project_state_entries**: 110 total (atocore=47, p06=19, p05=18, p04=15, abb=6, atomizer=5)
+- **project_state_entries**: 63 (atocore alone; full cross-project count not re-sampled this update)
-- **entities**: 35 (engineering knowledge graph, Layer 2)
+- **entities**: 66 (up from 35 — V1-0 backfill + ongoing work; 0 open conflicts)
 - **off_host_backup**: `papa@192.168.86.39:/home/papa/atocore-backups/` via cron, verified
 - **nightly_pipeline**: backup → cleanup → rsync → OpenClaw import → vault refresh → extract → auto-triage → **auto-promote/expire (NEW)** → weekly synth/lint Sundays → **retrieval harness (NEW)** → **pipeline summary (NEW)**
 - **capture_clients**: claude-code (Stop hook + cwd project inference), openclaw (before_agent_start + llm_output plugin, verified live)
 - **wiki**: http://dalidou:8100/wiki (browse), /wiki/projects/{id}, /wiki/entities/{id}, /wiki/search
 - **dashboard**: http://dalidou:8100/admin/dashboard (now shows pipeline health, interaction totals by client, all registered projects)
+- **active_track**: Engineering V1 Completion (started 2026-04-22). V1-0 landed (`2712c5d`). V1-A density gate CLEARED (784 active ≫ 100 target as of 2026-04-23). V1-A soak gate at day 5/~7 (F4 first run 2026-04-19; nightly clean 2026-04-19 through 2026-04-23; failures confined to the known p04-constraints content gap). Plan: `docs/plans/engineering-v1-completion-plan.md`. Resume map: `docs/plans/v1-resume-state.md`.
+- **last_nightly_pipeline**: `2026-04-23T03:00:20Z` — harness 17/18, triage promoted=3 rejected=7 human=0, dedup 7 clusters (1 tier1 + 6 tier2 auto-merged), graduation 30-skipped 0-graduated 0-errors, auto-triage drained the queue (0 new candidates 2026-04-22T00:52Z run)
+- **open_branches**: none — R14 squash-merged as `0989fed` and deployed 2026-04-23T15:20:53Z. V1-A is the next scheduled work
 
 ## Active Plan
 
@@ -143,9 +146,12 @@ One branch `codex/extractor-eval-loop` for Day 1-5, a second `codex/retrieval-ha
 | R11 | Codex  | P2       | src/atocore/api/routes.py:773-845  | `POST /admin/extract-batch` still accepts `mode="llm"` inside the container and returns a successful 0-candidate result instead of surfacing that host-only LLM extraction is unavailable from this runtime. That is a misleading API contract for operators. | fixed        | Claude | 2026-04-12 | (pending)   |
 | R12 | Codex  | P2       | scripts/batch_llm_extract_live.py:39-190 | The host-side extractor duplicates the LLM system prompt and JSON parsing logic from `src/atocore/memory/extractor_llm.py`. It works today, but this is now a prompt/parser drift risk across the container and host implementations. | fixed        | Claude | 2026-04-12 | (pending)   |
 | R13 | Codex  | P2       | DEV-LEDGER.md:12                    | The new `286 passing` test-count claim is not reproducibly auditable from the current audit environments: neither Dalidou nor the clean worktree has `pytest` available. The claim may be true in Claude's dev shell, but it remains unverified in this audit. | fixed        | Claude | 2026-04-12 | (pending)   |
+| R14 | Codex  | P2       | src/atocore/api/routes.py (POST /entities/{id}/promote) | The HTTP `POST /entities/{id}/promote` route does not translate the new service-layer `ValueError("source_refs required: cannot promote a candidate with no provenance...")` into a 400. A legacy no-provenance candidate promoted through the API currently surfaces as a 500. Does not block V1-0 acceptance; tidy in a follow-up. | fixed        | Claude | 2026-04-22 | 0989fed     |
 
 ## Recent Decisions
 
+- **2026-04-22** **Wiki reorg reframed as read-only operator orientation.** The earlier `docs/plans/wiki-reorg-plan.md` (5 additions W-1…W-5 adding `/wiki/interactions`, `/wiki/memories`, project-page restructure, recent feed, topnav exposure) is **superseded** and marked as such in-tree. Successor is `docs/plans/operator-orientation-plan.md` in the `ATOCore-clean` workspace: no `/wiki` surface, no Human Mirror implementation, no new API routes, no schema changes, no new source of truth. First deliverables are docs-only: `docs/where-things-live.md` (operator map of source/staged/machine/registry/trusted-state/memories/interactions/logs/backups with explicit edit-vs-don't-edit boundaries) and `docs/operator-home.md` (short daily starting page indexing those docs + a 4-command read-only orientation sequence). README and operations.md link both. Optional future work (`project-overview` and `memory-candidates` CLI helpers over existing endpoints) is gated on the docs proving useful in practice. *Proposed by:* Antoine. *Drafted by:* Claude. *Pending Codex review.*
+- **2026-04-22** **V1-0 done: approved, merged, deployed, prod backfilled.** Codex pulled `f16cd52`, re-ran the two original probes (both pass), re-ran the three targeted regression suites (all pass). Squash-merged to main as `2712c5d`. Dalidou deployed via canonical deploy script; `/health` reports build_sha=`2712c5d2d03cb2a6af38b559664afd1c4cd0e050`, status=ok. Validated backup snapshot taken at `/srv/storage/atocore/backups/snapshots/20260422T190624Z` before backfill. Prod backfill: `--dry-run` found 31 active/superseded entities with no provenance; list reviewed and sane; live run updated 31 rows via the default `hand_authored=1` flag path; follow-up dry-run returned 0 rows remaining. Residual logged as R14 (P2): `POST /entities/{id}/promote` HTTP route doesn't translate the new service-layer `ValueError` into a 400 — legacy bad candidate promotes via the API return 500 instead. Does not block V1-0 acceptance. V1-0 closed. Next: V1-A (Q-001 subsystem-scoped variant + Q-6 integration). V1-A holds until the soak window ends ~2026-04-26 and the 100-memory density target is hit. *Approved + landed by:* Codex. *Ratified by:* Antoine.
 - **2026-04-22** **Engineering V1 Completion Plan — Codex sign-off (third round)**. Codex's third-round audit closed the remaining five open questions with concrete resolutions, patched inline in `docs/plans/engineering-v1-completion-plan.md`: (1) F-7 row rewritten with ground truth — schema + preserve-original + test coverage already exist (`graduated_to_entity_id` at `database.py:143-146`, `graduated` status in memory service, promote hook at `service.py:354-356,389-451`, tests at `test_engineering_v1_phase5.py:67-90`); **real gaps** are missing direct `POST /memory/{id}/graduate` route and spec's `knowledge→Fact` mismatch (no `fact` entity type exists; reconcile to `parameter` or similar); V1-E 2 → **3–4 days**; (2) Q-5 determinism reframed — don't stabilize the call to `datetime.now()`, inject regenerated timestamp + checksum as renderer inputs, remove DB iteration ordering dependencies; V1-D scope updated; (3) `project` vs `project_id` — doc note only, no rename, resolved; (4) total estimate 16.5–17.5 → **17.5–19.5 focused days** with calendar buffer on top; (5) "Minions" must not be canonized in D-3 release notes — neutral wording ("queued background processing / async workers") only. **Agreement reached**: Claude + Codex + Antoine aligned. V1-0 is ready to start once the current pipeline soak window ends (~2026-04-26) and the 100-memory density target is hit. *Patched by:* Codex. *Signed off by:* Codex ("with those edits, I'd sign off on the five questions"). *Accepted by:* Antoine. *Executor (V1-0 onwards):* Claude.
 - **2026-04-22** **Engineering V1 Completion Plan revised per Codex second-round file-level audit** — three findings folded in, all with exact file:line refs from Codex: (1) F-1 downgraded from ✅ to 🟡 — `extractor_version` and `canonical_home` missing from `Entity` dataclass and `entities` table per `engineering-v1-acceptance.md:45`; V1-0 scope now adds both fields via additive migration + doc note that `project` IS `project_id` per "fields equivalent to" spec wording; (2) F-2 replaced with ground-truth per-query status: 9 of 20 v1-required queries done (Q-004/Q-005/Q-006/Q-008/Q-009/Q-011/Q-013/Q-016/Q-017), 1 partial (Q-001 needs subsystem-scoped variant), 10 missing (Q-002/003/007/010/012/014/018/019/020); V1-A scope shrank to Q-001 shape fix + Q-6 integration (pillar queries already implemented); V1-C closes the 8 remaining new queries + Q-020 deferred to V1-D; (3) F-5 reframed — generic `conflicts` + `conflict_members` schema already present at `database.py:190`, no migration needed; divergence is detector body (per-type dispatch needs generalization) + routes (`/admin/conflicts/*` needs `/conflicts/*` alias). Total revised to 16.5–17.5 days, ~60 tests. Plan: `docs/plans/engineering-v1-completion-plan.md` at commit `ce3a878` (Codex pulled clean). Three of Codex's eight open questions now answered; remaining: F-7 graduation depth, mirror determinism, `project` rename question, velocity calibration, minions naming. *Proposed by:* Claude. *Reviewed by:* Codex (two rounds).
 - **2026-04-22** **Engineering V1 Completion Plan revised per Codex first-round review** — original six-phase order (queries → ingest → mirror → graduation → provenance → ops) rejected by Codex as backward: provenance-at-write (F-8) and conflict-detection hooks (F-5 minimal) must precede any phase that writes active entities. Revised to seven phases: V1-0 write-time invariants (F-8 + F-5 hooks + F-1 audit) as hard prerequisite, V1-A minimum query slice proving the model, V1-B ingest, V1-C full query catalog, V1-D mirror, V1-E graduation, V1-F full F-5 spec + ops + docs. Also softened "parallel with Now list" — real collision points listed explicitly; schedule shifted ~4 weeks to reflect that V1-0 cannot start during pipeline soak. Withdrew the "50–70% built" global framing in favor of the per-criterion gap table. Workspace sync note added: Codex's Playground workspace can't see the plan file; canonical dev tree is Windows `C:\Users\antoi\ATOCore`. Plan: `docs/plans/engineering-v1-completion-plan.md`. Awaiting Codex file-level audit once workspace syncs. *Proposed by:* Claude. *First-round review by:* Codex.
@@ -164,6 +170,14 @@ One branch `codex/extractor-eval-loop` for Day 1-5, a second `codex/retrieval-ha
 
 ## Session Log
 
+- **2026-04-23 Codex + Claude (R14 closed)** Codex reviewed `claude/r14-promote-400` at `3888db9`, no findings: "The route change is narrowly scoped: `promote_entity()` still returns False for not-found/not-candidate cases, so the existing 404 behavior remains intact, while caller-fixable validation failures now surface as 400." Ran `pytest tests/test_v1_0_write_invariants.py -q` from an isolated worktree: 15 passed in 1.91s. Claude squash-merged to main as `0989fed`, followed by ledger close-out `2b86543`, then deployed via canonical script. Dalidou `/health` reports build_sha=`2b86543e6ad26011b39a44509cc8df3809725171`, build_time `2026-04-23T15:20:53Z`, status=ok. R14 closed. Orientation refreshed earlier this session also reflected the V1-A gate status: **density gate CLEARED** (784 active memories vs 100 target — density batch-extract ran between 2026-04-22 and 2026-04-23 and more than crushed the gate), **soak gate at day 5 of ~7** (F4 first run 2026-04-19; nightly clean 2026-04-19 through 2026-04-23; only chronic failure is the known p04-constraints "Zerodur" content gap). V1-A branches from a clean V1-0 baseline as soon as the soak is called done.
+
+- **2026-04-22 Codex + Antoine (V1-0 closed)** Codex approved `f16cd52` after re-running both original probes (legacy-candidate promote + supersede hook — both correct) and the three targeted regression suites (`test_v1_0_write_invariants.py`, `test_engineering_v1_phase5.py`, `test_inbox_crossproject.py` — all pass). Squash-merged to main as `2712c5d` ("feat(engineering): enforce V1-0 write invariants"). Deployed to Dalidou via the canonical deploy script; `/health` build_sha=`2712c5d2d03cb2a6af38b559664afd1c4cd0e050` status=ok. Validated backup snapshot at `/srv/storage/atocore/backups/snapshots/20260422T190624Z` taken BEFORE prod backfill. Prod backfill of `scripts/v1_0_backfill_provenance.py` against live DB: dry-run found 31 active/superseded entities with no provenance, list reviewed and looked sane; live run with default `hand_authored=1` flag path updated 31 rows; follow-up dry-run returned 0 rows remaining → no lingering F-8 violations in prod. Codex logged one residual P2 (R14): HTTP `POST /entities/{id}/promote` route doesn't translate the new service-layer `ValueError` into 400 — legacy bad candidate promoted through the API surfaces as 500. Not blocking. V1-0 closed. **Gates for V1-A**: soak window ends ~2026-04-26; 100-active-memory density target (currently 84 active + the ~31 newly flagged ones — need to check how those count in density math). V1-A holds until both gates clear.
+
+- **2026-04-22 Claude (V1-0 patches per Codex review)** Codex audit of commit `cbf9e03` surfaced two P1 gaps + one P2 scope concern, all verified with code-level probes. **P1 #1**: `promote_entity` didn't re-check the F-8 invariant — a legacy candidate with empty `source_refs` and `hand_authored=0` could still promote to active, violating the plan's "invariant at both `create_entity` and `promote_entity`". Fixed: `promote_entity` at `service.py:365-379` now raises `ValueError("source_refs required: cannot promote a candidate with no provenance...")` before flipping status. Stays symmetric with the create-side error. **P1 #2**: `supersede_entity` was missing the F-5 hook the plan requires on every active-entity write path. The `supersedes` relationship rooted at the `superseded_by` entity can create a conflict the detector should catch. Fixed at `service.py:581-591`: calls `detect_conflicts_for_entity(superseded_by)` with fail-open per Q-3. **P2**: backfill script's `--invalidate-instead` flag queried both active AND superseded rows; invalidating already-superseded rows would collapse history. Fixed at `scripts/v1_0_backfill_provenance.py:52-63`: `--invalidate-instead` now scopes to `status='active'` only (default flag-hand_authored mode stays broad as it's additive/non-destructive). Help text tightened to make the destructive posture explicit. **Four new regression tests** in `test_v1_0_write_invariants.py`: (1) `test_promote_rejects_legacy_candidate_without_provenance` — directly inserts a legacy candidate and confirms promote raises + row stays candidate; (2) `test_promote_accepts_candidate_flagged_hand_authored` — symmetry check; (3) `test_supersede_runs_conflict_detection_on_new_active` — monkeypatches detector, confirms hook fires on `superseded_by`; (4) `test_supersede_hook_fails_open` — Q-3 check for supersede path. **Test count**: 543 → 547 (+4 regression). Full suite `547 passed in 81.07s`. Next: commit patches on branch, push, Codex re-review.
+
+- **2026-04-22 Claude (V1-0 landed on branch)** First V1 completion phase done on branch `claude/v1-0-write-invariants`. **F-1 schema remediation**: added `extractor_version`, `canonical_home`, `hand_authored` columns to `entities` via idempotent ALTERs in both `_apply_migrations` (`database.py:148-170`) and `init_engineering_schema` (`service.py:95-139`). CREATE TABLE also updated so fresh DBs get the columns natively. New `_table_exists` helper at `database.py:378`. `Entity` dataclass gains the three fields with sensible defaults. `EXTRACTOR_VERSION = "v1.0.0"` module constant at top of `service.py`. `_row_to_entity` tolerates rows without the new columns so tests predating V1-0 still pass. **F-8 provenance enforcement**: `create_entity` raises `ValueError("source_refs required: ...")` when called without non-empty source_refs AND without `hand_authored=True`. New kwargs `hand_authored: bool = False` and `extractor_version: str | None = None` threaded through `service.create_entity`, the `EntityCreateRequest` Pydantic model, the API route, and the wiki `/wiki/new` form body (form writes `hand_authored: true` since human entries are hand-authored by definition). **F-5 hook on active create**: `create_entity(status="active")` now calls `detect_conflicts_for_entity` with fail-open per `conflict-model.md:256` (errors log warning, write still succeeds). The promote path's existing hook at `service.py:400-404` was kept as-is. **Doc note** added to `engineering-ontology-v1.md` recording that `project` IS the `project_id` per "fields equivalent to" wording. **Backfill script** at `scripts/v1_0_backfill_provenance.py` — idempotent, defaults to flagging no-provenance active entities as `hand_authored=1`, supports `--dry-run` and `--invalidate-instead`. **Tests**: 10 new in `tests/test_v1_0_write_invariants.py` covering F-1 fields, F-8 raise path, F-8 hand_authored bypass, F-5 active-create hook, F-5 candidate-no-hook, Q-3 fail-open on detector error, Q-4 partial (scope_only=active excludes candidates). **Test fixes**: three pre-existing tests adapted — `test_requirement_name_conflict_detected` + `test_conflict_resolution_dismiss_leaves_entities_alone` now read from `list_open_conflicts` because the V1-0 hook records the conflict at create-time (detector dedup returns [] on re-run); `test_api_post_entity_with_null_project_stores_global` sends `hand_authored: true` since the fixture has no source_refs. **conftest.py monkeypatch**: wraps `create_entity` so tests missing both source_refs and hand_authored default to `hand_authored=True` (reasonable since tests author their own fixture data). Production paths (API route, wiki form, graduation scripts) all pass explicit values and are unaffected by the monkeypatch. **Test count**: 533 → 543 (+10), full suite `543 passed in 77.86s`. **Not yet**: commit + push + Codex review + deploy. **Branch**: `claude/v1-0-write-invariants`.
+
 - **2026-04-22 Codex (late night)** Third-round audit closed the remaining five open questions. Patched `docs/plans/engineering-v1-completion-plan.md` inline (no commit by Codex). **F-7 finding (P1):** graduation stack is partially built — `_graduation_prompt.py`, `scripts/graduate_memories.py`, `database.py:143-146` (`graduated_to_entity_id`), memory `graduated` status, promote-preserves-original at `service.py:354-356,389-451`, tests at `test_engineering_v1_phase5.py:67-90` all exist. Real gaps: no direct `POST /memory/{id}/graduate` route at `routes.py:756`; spec's `knowledge→Fact` doesn't match ontology (`service.py:16` has no `fact` type — reconcile to `parameter` or similar). V1-E estimate 2 → 3–4 days. **Q-5 finding (P2):** "stabilize timestamp" insufficient — renderer reads wall-clock in `_footer()` at `mirror.py:320`; fix is inject regenerated timestamp + checksum as renderer inputs + sort DB iteration + remove dict ordering deps. V1-D scope patched. **Remaining three (P3):** `project` stays as doc-note equivalence (no rename); total estimate 17.5–19.5 focused days; release notes must NOT canonize "Minions" — neutral "queued background processing / async workers" only. **Sign-off:** "with those edits, I'd sign off on the five questions. The only non-architectural uncertainty left in the plan is scheduling discipline against the current Now list; that does not block V1-0 once the soak window and memory-density gate clear." **Status:** Claude + Codex agreed. Plan frozen pending Antoine final accept and gate clearance. Claude to commit Codex's patches + push.
 
 - **2026-04-22 Claude (late night)** Codex second-round review did the full file-level audit and came back with three P1/P2 findings, all with exact file:line refs. Verified each against current code before revising. (1) **F-1 not clean**: `Entity` dataclass at `service.py:67` and `entities` table schema are missing the `extractor_version` and `canonical_home` shared-header fields required by `engineering-v1-acceptance.md:45`; `project` field is the project identifier but not named `project_id` as spec writes (spec wording "fields equivalent to" allows the naming, but needs explicit doc note). V1-0 scope now includes adding both missing fields via additive `_apply_migrations` pattern. (2) **F-2 needed exact statuses, not guesses**: per-function audit gave ground truth — 9 of 20 v1-required queries done, 1 partial (Q-001 returns project-wide tree not subsystem-scoped expand=contains per `engineering-query-catalog.md:71`), 10 missing. V1-A scope shrank to Q-001 shape fix + Q-6 integration (most pillar queries already implemented); V1-C closes the 8 net-new queries + Q-020 to V1-D. (3) **F-5 misframed**: the generic `conflicts` + `conflict_members` schema is ALREADY spec-compliant at `database.py:190`; divergence is detector body at `conflicts.py:36` (per-type dispatch needs generalization) + route path (`/admin/conflicts/*` needs `/conflicts/*` alias). V1-F no longer includes a schema migration; detector generalization + route alignment only. Totals revised to 16.5–17.5 days, ~60 tests (down from 12–17 / 65 because V1-A and V1-F scopes both shrank after audit). Three of the eight open questions resolved. Remaining open: F-7 graduation depth, mirror determinism, `project` naming, velocity calibration, minions-as-V2 naming. No code changes this session — plan + ledger only. Next: commit + push revised plan, then await Antoine+Codex joint sign-off before V1-0 starts.

docs/architecture/engineering-ontology-v1.md

@@ -159,6 +159,17 @@ Every major object should support fields equivalent to:
 - `created_at`
 - `updated_at`
 - `notes` (optional)
+- `extractor_version` (V1-0)
+- `canonical_home` (V1-0)
+
+**Naming note (V1-0, 2026-04-22).** The AtoCore `entities` table and
+`Entity` dataclass name the project-identifier field `project`, not
+`project_id`. This doc's "fields equivalent to" wording allows that
+naming flexibility — the `project` field on entity rows IS the
+`project_id` per spec. No storage rename is planned; downstream readers
+should treat `entity.project` as the project identifier. This was
+resolved in Codex's third-round audit of the V1 Completion Plan (see
+`docs/plans/engineering-v1-completion-plan.md`).
 
 ## Suggested Status Lifecycle
 

docs/current-state.md

@@ -1,6 +1,31 @@
-# AtoCore — Current State (2026-04-19)
+# AtoCore — Current State (2026-04-22)
 
-Live deploy: `877b97e` · Dalidou health: ok · Harness: 17/18.
+Live deploy: `2712c5d` · Dalidou health: ok · Harness: 17/18 · Tests: 547 passing.
+
+## V1-0 landed 2026-04-22
+
+Engineering V1 completion track has started. **V1-0 write-time invariants**
+merged and deployed: F-1 shared-header fields (`extractor_version`,
+`canonical_home`, `hand_authored`) added to `entities`, F-8 provenance
+enforcement at both `create_entity` and `promote_entity`, F-5 synchronous
+conflict-detection hook on every active-entity write path (create, promote,
+supersede) with Q-3 fail-open. Prod backfill ran cleanly — 31 legacy
+active/superseded entities flagged `hand_authored=1`, follow-up dry-run
+returned 0 remaining rows. Test count 533 → 547 (+14).
+
+R14 (P2, non-blocking): `POST /entities/{id}/promote` route fix translates
+the new `ValueError` into 400. Branch `claude/r14-promote-400` pending
+Codex review + squash-merge.
+
+**Next in the V1 track:** V1-A (minimal query slice + Q-6 killer-correctness
+integration). Gated on pipeline soak (~2026-04-26) + 100+ active memory
+density target. See `docs/plans/engineering-v1-completion-plan.md` for
+the full 7-phase roadmap and `docs/plans/v1-resume-state.md` for the
+"you are here" map.
+
+---
+
+## Snapshot from previous update (2026-04-19)
 
 ## The numbers
 

docs/master-plan-status.md

@@ -168,16 +168,40 @@ These are the current practical priorities.
    "Zerodur" for p04 constraint queries. Investigate if it's a missing
    memory or retrieval ranking issue.
 
+## Active — Engineering V1 Completion Track (started 2026-04-22)
+
+The Engineering V1 sprint moved from **Next** to **Active** on 2026-04-22.
+The discovery from the gbrain review was that V1 entity infrastructure
+had been built incrementally already; the sprint is a **completion** plan
+against `engineering-v1-acceptance.md`, not a greenfield build. Full plan:
+`docs/plans/engineering-v1-completion-plan.md`. "You are here" single-page
+map: `docs/plans/v1-resume-state.md`.
+
+Seven phases, ~17.5–19.5 focused days, runs in parallel with the Now list
+where surfaces are disjoint, pauses when they collide.
+
+| Phase | Scope | Status |
+|---|---|---|
+| V1-0 | Write-time invariants: F-1 header fields + F-8 provenance enforcement + F-5 hook on every active-entity write + Q-3 flag-never-block | ✅ done 2026-04-22 (`2712c5d`) |
+| V1-A | Minimum query slice: Q-001 subsystem-scoped variant + Q-6 killer-correctness integration test on p05-interferometer | 🟡 gated — starts when soak (~2026-04-26) + density (100+ active memories) gates clear |
+| V1-B | KB-CAD + KB-FEM ingest (`POST /ingest/kb-cad/export`, `POST /ingest/kb-fem/export`) + D-2 schema docs | pending V1-A |
+| V1-C | Close the remaining 8 queries (Q-002/003/007/010/012/014/018/019; Q-020 to V1-D) | pending V1-B |
+| V1-D | Full mirror surface (3 spec routes + regenerate + determinism + disputed + curated markers) + Q-5 golden file | pending V1-C |
+| V1-E | Memory→entity graduation end-to-end + remaining Q-4 trust tests | pending V1-D (note: collides with memory extractor; pauses for multi-model triage work) |
+| V1-F | F-5 detector generalization + route alias + O-1/O-2/O-3 operational + D-1/D-3/D-4 docs | finish line |
+
+R14 (P2, non-blocking): `POST /entities/{id}/promote` route returns 500
+on the new V1-0 `ValueError` instead of 400. Fix on branch
+`claude/r14-promote-400`, pending Codex review.
+
 ## Next
 
-These are the next major layers after the current stabilization pass.
+These are the next major layers after V1 and the current stabilization pass.
 
 1. Phase 6 AtoDrive — clarify Google Drive as a trusted operational
    source and ingest from it
 2. Phase 13 Hardening — Chroma backup policy, monitoring, alerting,
    failure visibility beyond log files
-3. Engineering V1 implementation sprint — once knowledge density is
-   sufficient and the pipeline feels boring and dependable
 
 ## Later
 

docs/plans/v1-resume-state.md

@@ -0,0 +1,161 @@
+# V1 Completion — Resume State
+
+**Last updated:** 2026-04-22 (after V1-0 landed + R14 branch pushed)
+**Purpose:** single-page "you are here" so any future session can pick up
+the V1 completion sprint without re-reading the full plan history.
+
+## State of play
+
+- **V1-0 is DONE.** Merged to main as `2712c5d`, deployed to Dalidou,
+  prod backfill ran cleanly (31 legacy entities flagged
+  `hand_authored=1`, zero violations remaining).
+- **R14 is on a branch.** `claude/r14-promote-400` at `3888db9` —
+  HTTP promote route returns 400 instead of 500 on V1-0 `ValueError`.
+  Pending Codex review + squash-merge. Non-blocking for V1-A.
+- **V1-A is next but GATED.** Doesn't start until both gates clear.
+
+## Start-gates for V1-A
+
+| Gate | Condition | Status as of 2026-04-22 |
+|---|---|---|
+| Soak | Four clean nightly cycles since F4 confidence-decay first real run 2026-04-19 | Day 3 of 4 — expected clear around **2026-04-26** |
+| Density | 100+ active memories | 84 active as of last ledger update — need +16. Lever: `scripts/batch_llm_extract_live.py` against 234-interaction backlog |
+
+**When both are green, start V1-A.** If only one is green, hold.
+
+## Pre-flight checklist when resuming
+
+Before opening the V1-A branch, run through this in order:
+
+1. `git checkout main && git pull` — make sure you're at the tip
+2. Check `DEV-LEDGER.md` **Orientation** for current `live_sha`, `test_count`, `active_memories`
+3. Check `/health` on Dalidou returns the same `build_sha` as Orientation
+4. Check the dashboard for pipeline health: http://dalidou:8100/admin/dashboard
+5. Confirm R14 branch status — either merged or explicitly deferred
+6. Re-read the two core plan docs:
+   - `docs/plans/engineering-v1-completion-plan.md` — the full 7-phase plan
+   - `docs/architecture/engineering-v1-acceptance.md` — the acceptance contract
+7. Skim the relevant spec docs for the phase you're about to start:
+   - V1-A: `engineering-query-catalog.md` (Q-001 + Q-006/Q-009/Q-011 killer queries)
+   - V1-B: `tool-handoff-boundaries.md` (KB-CAD/KB-FEM export shapes)
+   - V1-C: `engineering-query-catalog.md` (all remaining v1-required queries)
+   - V1-D: `human-mirror-rules.md` (mirror spec end-to-end)
+   - V1-E: `memory-vs-entities.md` (graduation flow)
+   - V1-F: `conflict-model.md` (generic slot-key detector)
+
+## What V1-A looks like when started
+
+**Branch:** `claude/v1-a-pillar-queries`
+
+**Scope (~1.5 days):**
+- **Q-001 shape fix.** Add a subsystem-scoped variant of `system_map()`
+  matching `GET /entities/Subsystem/<id>?expand=contains` per
+  `engineering-query-catalog.md:71`. The project-wide version stays
+  (it serves Q-004).
+- **Q-6 integration test.** Seed p05-interferometer with five cases:
+  1 satisfying Component, 1 orphan Requirement, 1 Decision on flagged
+  Assumption, 1 supported ValidationClaim, 1 unsupported ValidationClaim.
+  One test asserting Q-006 / Q-009 / Q-011 return exactly the expected
+  members.
+- The four "pillar" queries (Q-001, Q-005, Q-006, Q-017) already work
+  per Codex's 2026-04-22 audit. V1-A does NOT re-implement them —
+  V1-A verifies them on seeded data.
+
+**Acceptance:** Q-001 subsystem-scoped variant + Q-6 integration test both
+green. F-2 moves from 🟡 partial to slightly-less-partial.
+
+**Estimated tests added:** ~4 (not ~12 — V1-A scope shrank after Codex
+confirmed most queries already work).
+
+## Map of the remaining phases
+
+```
+V1-0 ✅  write-time invariants          landed 2026-04-22 (2712c5d)
+        ↓
+V1-A 🟡 minimum query slice            gated on soak + density (~1.5d when started)
+        ↓
+V1-B    KB-CAD/KB-FEM ingest + D-2     ~2d
+        ↓
+V1-C    close 8 remaining queries      ~2d
+        ↓
+V1-D    full mirror + determinism      ~3-4d (biggest phase)
+        ↓
+V1-E    graduation + trust tests       ~3-4d (pauses for multi-model triage)
+        ↓
+V1-F    F-5 generalization + ops + docs ~3d — V1 done
+```
+
+## Parallel work that can run WITHOUT touching V1
+
+These are genuinely disjoint surfaces; pick any of them during the gate
+pause or as scheduling allows:
+
+- **Density batch-extract** — *required* to unblock V1-A. Not optional.
+- **p04-constraints harness fix** — retrieval-ranking change, fully
+  disjoint from entities. Safe to do anywhere in the V1 track.
+- **Multi-model triage (Phase 11 entry)** — memory-side work, disjoint
+  from V1-A/B/C/D. **Pause before V1-E starts** because V1-E touches
+  memory module semantics.
+
+## What NOT to do
+
+- Don't start V1-A until both gates are green.
+- Don't touch the memory extractor write path while V1-E is open.
+- Don't name the rejected "Minions" plan in any doc — neutral wording
+  only ("queued background processing / async workers") per Codex
+  sign-off.
+- Don't rename the `project` field to `project_id` — Codex + Antoine
+  agreed it stays as `project`, with a doc note in
+  `engineering-ontology-v1.md` that this IS the project_id per spec.
+
+## Open review findings
+
+| id | severity | summary | status |
+|---|---|---|---|
+| R14 | P2 | `POST /entities/{id}/promote` returns 500 on V1-0 `ValueError` instead of 400 | fixed on branch `claude/r14-promote-400`, pending Codex review |
+
+Closed V1-0 findings: P1 "promote path allows provenance-less legacy
+candidates" (service.py:365-379), P1 "supersede path missing F-5 hook"
+(service.py:581-591), P2 "`--invalidate-instead` backfill too broad"
+(v1_0_backfill_provenance.py:52-63). All three patched and approved in
+the squash-merge to `2712c5d`.
+
+## How agreement between Claude + Codex has worked so far
+
+Three review rounds before V1-0 started + three during implementation:
+
+1. **Rejection round.** Claude drafted a gbrain-inspired "Phase 8
+   Minions + typed edges" plan; Codex rejected as wrong-packaging.
+   Record: `docs/decisions/2026-04-22-gbrain-plan-rejection.md`.
+2. **Completion-plan rewrite.** Claude rewrote against
+   `engineering-v1-acceptance.md`. Codex first-round review fixed the
+   phase order (provenance-first).
+3. **Per-file audit.** Codex's second-round audit found F-1 / F-2 /
+   F-5 gaps, all folded in.
+4. **Sign-off round.** Codex's third-round review resolved the five
+   remaining open questions inline and signed off: *"with those edits,
+   I'd sign off on the five questions."*
+5. **V1-0 review.** Codex found two P1 gaps (promote re-check missing,
+   supersede hook missing) + one P2 (backfill scope too broad). All
+   three patched. Codex re-ran probes + regression suites, approved,
+   squash-merged.
+6. **V1-0 deploy + prod backfill.** Codex deployed + ran backfill,
+   logged R14 as P2 residual.
+
+Protocol has been: Claude writes, Codex audits, human Antoine ratifies.
+Continue this for V1-A onward.
+
+## References
+
+- `docs/plans/engineering-v1-completion-plan.md` — full 7-phase plan
+- `docs/decisions/2026-04-22-gbrain-plan-rejection.md` — prior rejection
+- `docs/architecture/engineering-ontology-v1.md` — V1 ontology (18 predicates)
+- `docs/architecture/engineering-query-catalog.md` — Q-001 through Q-020 spec
+- `docs/architecture/engineering-v1-acceptance.md` — F/Q/O/D acceptance table
+- `docs/architecture/promotion-rules.md` — candidate → active flow
+- `docs/architecture/conflict-model.md` — F-5 spec
+- `docs/architecture/human-mirror-rules.md` — V1-D spec
+- `docs/architecture/memory-vs-entities.md` — V1-E spec
+- `docs/architecture/tool-handoff-boundaries.md` — V1-B KB-CAD/KB-FEM
+- `docs/master-plan-status.md` — Now / Active / Next / Later
+- `DEV-LEDGER.md` — Orientation + Open Review Findings + Session Log

docs/plans/wiki-reorg-plan.md

@@ -0,0 +1,216 @@
+# Wiki Reorg Plan — Human-Readable Navigation of AtoCore State
+
+> **SUPERSEDED — 2026-04-22.** Do not implement this plan. It has been
+> replaced by the read-only operator orientation work at
+> `docs/plans/operator-orientation-plan.md` (in the `ATOCore-clean`
+> workspace). The successor reframes the problem as orientation over
+> existing APIs and docs rather than a new `/wiki` surface, and drops
+> interaction browser / memory index / project-page restructure from
+> scope. Nothing below should be picked up as a work item. Kept in tree
+> for context only.
+
+**Date:** 2026-04-22
+**Author:** Claude (after walking the live wiki at `http://dalidou:8100/wiki`
+and reading `src/atocore/engineering/wiki.py` + `/wiki/*` routes in
+`src/atocore/api/routes.py`)
+**Status:** SUPERSEDED (see banner above). Previously: Draft, pending Codex review
+**Scope boundary:** This plan does NOT touch Inbox / Global / Emerging.
+Those three surfaces stay exactly as they are today — the registration
+flow and scope semantics around them are load-bearing and out of scope
+for this reorg.
+
+---
+
+## Position
+
+The wiki is Layer 3 of the engineering architecture (Human Mirror —
+see `docs/architecture/engineering-knowledge-hybrid-architecture.md`).
+It is a **derived view** over the same database the LLM reads via
+`atocore_context` / `atocore_search`. There is no parallel store; if a
+fact is in the DB it is reachable from the wiki.
+
+The user-facing problem is not representation, it is **findability and
+structure**. Content the operator produced (proposals, decisions,
+constraints, captured conversations) is in the DB but is not reachable
+along a natural human reading path. Today the only routes to it are:
+
+- typing the right keyword into `/wiki/search`
+- remembering which project it lived under and scrolling the auto-
+  generated mirror markdown on `/wiki/projects/{id}`
+- the homepage "What the brain is doing" strip, which shows counts of
+  audit actions but no content
+
+There is no "recent conversations" view, no memory index, no way to
+browse by memory type (decision vs preference vs episodic), and the
+topnav only exposes Home / Activity / Triage / Dashboard.
+
+## Goal
+
+Make the wiki a surface the operator actually uses to answer three
+recurring questions:
+
+1. **"Where did I say / decide / propose X?"** — find a memory or
+   interaction by topic, not by exact-string search.
+2. **"What is the current state of project Y?"** — read decisions,
+   constraints, and open questions as distinct sections, not as one
+   wall of auto-generated markdown.
+3. **"What happened in the system recently, and what does it mean?"**
+   — a human-meaningful recent feed (captures, promotions, decisions
+   recorded), not a count of audit-action names.
+
+Success criterion: for each of the three questions above, a first-time
+visitor reaches a useful answer in **≤ 2 clicks from `/wiki`**.
+
+## Non-goals
+
+- No schema changes. All data already exists.
+- No change to ingestion, extraction, promotion, or the trust rules.
+- No change to Inbox / Global / Emerging surfaces or semantics.
+- No change to `/admin/triage` or `/admin/dashboard`.
+- No change to the `atocore_context` / `atocore_search` LLM-facing APIs.
+- No new storage. Every new page is a new render function over existing
+  service-layer calls.
+
+## What it will do
+
+Five additions, in priority order. Each is independently mergeable and
+independently revertable.
+
+### W-1 — Interaction browser: `/wiki/interactions`
+
+The DB holds 234 captured interactions (per ledger `2026-04-22`). None
+are readable in the wiki. Add a paginated list view and a detail view.
+
+- `/wiki/interactions?project=&client=&since=` — list, newest first,
+  showing timestamp, client (claude-code / openclaw / test), inferred
+  project, and the first ~160 chars of the user prompt.
+- `/wiki/interactions/{id}` — full prompt + response, plus any
+  candidate / active memories extracted from it (back-link from the
+  memory → interaction relation if present, else a "no extractions"
+  note).
+- Filters: project (multi), client, date range, "has extractions" boolean.
+
+Answers Q1 ("where did I say X") by giving the user a time-ordered
+stream of their own conversations, not just extracted summaries.
+
+### W-2 — Memory index: `/wiki/memories`
+
+Today `/wiki/memories/{id}` exists but there is no list view. Add one.
+
+- `/wiki/memories?project=&type=&status=&tag=` — filterable list.
+  Status defaults to `active`. Types: decision, preference, episodic,
+  knowledge, identity, adaptation.
+- Faceted counts in the sidebar (e.g. "decision: 14 · preference: 7").
+- Each row links to `/wiki/memories/{id}` and, where present, the
+  originating interaction.
+
+### W-3 — Project page restructure (tabbed, not flat)
+
+`/wiki/projects/{id}` today renders the full mirror markdown in one
+scroll. Restructure to tabs (or anchored sections, same thing
+semantically) over the data already produced by
+`generate_project_overview`:
+
+- **Overview** — stage, client, type, description, headline state.
+- **Decisions** — memories of type `decision` for this project.
+- **Constraints** — project_state entries in the `constraints` category.
+- **Proposals** — memories tagged `proposal` or type `preference` with
+  proposal semantics (exact filter TBD during W-3; see Open Questions).
+- **Entities** — current list, already rendered inline today.
+- **Memories** — all memories, reusing the W-2 list component filtered
+  to this project.
+- **Timeline** — interactions for this project, reusing W-1 filtered
+  to this project.
+
+No new data is produced; this is purely a slicing change.
+
+### W-4 — Recent feed on homepage
+
+Replace the current "What the brain is doing" strip (which shows audit
+action counts) with a **content** feed: the last N events that a human
+cares about —
+
+- new active memory (not candidate)
+- memory promoted candidate → active
+- state entry added / changed
+- new registered project
+- interaction captured (optional, may be noisy — gate behind a toggle)
+
+Each feed row links to the thing it describes. The audit-count strip
+can move to `/wiki/activity` where the full audit timeline already lives.
+
+### W-5 — Topnav exposure
+
+Surface the new pages in the topnav so they are discoverable:
+
+Current: `🏠 Home · 📡 Activity · 🔀 Triage · 📊 Dashboard`
+Proposed: `🏠 Home · 💬 Interactions · 🧠 Memories · 📡 Activity · 🔀 Triage · 📊 Dashboard`
+
+Domain pages (`/wiki/domains/{tag}`) stay reachable via tag chips on
+memory rows, as today — no new topnav entry for them.
+
+## Outcome
+
+- Every captured interaction is readable in the wiki, with a clear
+  path from interaction → extracted memories and back.
+- Memories are browsable without knowing a keyword in advance.
+- A project page separates decisions, constraints, and proposals
+  instead of interleaving them in auto-generated markdown.
+- The homepage tells the operator what **content** is new, not which
+  audit action counters incremented.
+- Nothing in the Inbox / Global / Emerging flow changes.
+- Nothing the LLM reads changes.
+
+## Non-outcomes (explicitly)
+
+- This plan does not improve retrieval quality. It does not touch the
+  extractor, ranking, or harness.
+- This plan does not change what is captured or when.
+- This plan does not replace `/admin/triage`. Candidate review stays there.
+
+## Sequencing
+
+1. **W-1 first.** Interaction browser is the biggest findability win
+   and has no coupling to memory code.
+2. **W-2 next.** Memory index reuses list/filter infra from W-1.
+3. **W-3** depends on W-2 (reuses the memory list component).
+4. **W-4** is independent; can land any time after W-1.
+5. **W-5** lands last so topnav only exposes pages that exist.
+
+Each step ships with at least one render test (HTML contains expected
+anchors / row counts against a seeded fixture), following the pattern
+already in `tests/engineering/` for existing wiki renders.
+
+## Risk & reversibility
+
+- All additions are new routes / new render functions. Reverting any
+  step is a file delete + a topnav edit.
+- Project page restructure (W-3) is the only edit to an existing
+  surface. Keep the flat-markdown render behind a query flag
+  (`?layout=flat`) for one release so regressions are observable.
+- No DB migrations. No service-layer signatures change.
+
+## Open questions for Codex
+
+1. **"Proposal" as a first-class filter** (W-3) — is this a memory type,
+   a domain tag, a structural field we should add, or should it stay
+   derived by filter? Current DB has no explicit proposal type; we'd be
+   inferring from tags/content. If that inference is unreliable, W-3's
+   Proposals tab becomes noise.
+2. **Interaction → memory back-link** (W-1) — does the current schema
+   already record which interaction an extracted memory came from? If
+   not, is exposing that link in the wiki worth a schema addition, or
+   should W-1 ship without it?
+3. **Recent feed noise floor** (W-4) — should every captured
+   interaction appear in the feed, or only interactions that produced
+   at least one candidate memory? The former is complete but may drown
+   out signal at current capture rates (~10/day).
+4. **Ordering vs V1 Completion track** — should any of this land before
+   V1-A (currently gated on soak ~2026-04-26 + density 100+), or is it
+   strictly after V1 closes?
+
+## Workspace note
+
+Canonical dev workspace is `C:\Users\antoi\ATOCore` (per `CLAUDE.md`).
+Any Codex audit of this plan should sync from `origin/main` at or after
+`2712c5d` before reviewing.

scripts/v1_0_backfill_provenance.py

@@ -0,0 +1,167 @@
+"""V1-0 one-time backfill: flag existing active entities that have no
+provenance (empty source_refs) as hand_authored=1 so they stop failing
+the F-8 invariant.
+
+Runs against the live AtoCore DB. Idempotent: a second run after the
+first touches nothing because the flagged rows already have
+hand_authored=1.
+
+Per the Engineering V1 Completion Plan (V1-0 scope), the three options
+for an existing active entity without provenance are:
+
+1. Attach provenance — impossible without human review, not automatable
+2. Flag hand-authored — safe, additive, this script's default
+3. Invalidate — destructive, requires operator sign-off
+
+This script picks option (2) by default. Add --dry-run to see what
+would change without writing. Add --invalidate-instead to pick option
+(3) for all rows (not recommended for first run).
+
+Usage:
+    python scripts/v1_0_backfill_provenance.py --base-url http://dalidou:8100 --dry-run
+    python scripts/v1_0_backfill_provenance.py --base-url http://dalidou:8100
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import sqlite3
+import sys
+from pathlib import Path
+
+
+def run(db_path: Path, dry_run: bool, invalidate_instead: bool) -> int:
+    if not db_path.exists():
+        print(f"ERROR: db not found: {db_path}", file=sys.stderr)
+        return 2
+
+    conn = sqlite3.connect(str(db_path))
+    conn.row_factory = sqlite3.Row
+
+    # Verify the V1-0 migration ran: if hand_authored column is missing
+    # the operator hasn't deployed V1-0 yet, and running this script
+    # would crash. Fail loud rather than attempt the ALTER here.
+    cols = {r["name"] for r in conn.execute("PRAGMA table_info(entities)").fetchall()}
+    if "hand_authored" not in cols:
+        print(
+            "ERROR: entities table lacks the hand_authored column. "
+            "Deploy V1-0 migrations first (init_db + init_engineering_schema).",
+            file=sys.stderr,
+        )
+        return 2
+
+    # Scope differs by mode:
+    # - Default (flag hand_authored=1): safe/additive, applies to active
+    #   AND superseded rows so the historical trail is consistent.
+    # - --invalidate-instead: destructive — scope to ACTIVE rows only.
+    #   Invalidating already-superseded history would collapse the audit
+    #   trail, which the plan's remediation scope never intended
+    #   (V1-0 talks about existing active no-provenance entities).
+    if invalidate_instead:
+        scope_sql = "status = 'active'"
+    else:
+        scope_sql = "status IN ('active', 'superseded')"
+    rows = conn.execute(
+        f"SELECT id, entity_type, name, project, status, source_refs, hand_authored "
+        f"FROM entities WHERE {scope_sql} AND hand_authored = 0"
+    ).fetchall()
+
+    needs_fix = []
+    for row in rows:
+        refs_raw = row["source_refs"] or "[]"
+        try:
+            refs = json.loads(refs_raw)
+        except Exception:
+            refs = []
+        if not refs:
+            needs_fix.append(row)
+
+    print(f"found {len(needs_fix)} active/superseded entities with no provenance")
+    for row in needs_fix:
+        print(
+            f"  - {row['id'][:8]} [{row['entity_type']}] "
+            f"{row['name']!r} project={row['project']!r} status={row['status']}"
+        )
+
+    if dry_run:
+        print("--dry-run: no changes written")
+        return 0
+
+    if not needs_fix:
+        print("nothing to do")
+        return 0
+
+    action = "invalidate" if invalidate_instead else "flag hand_authored=1"
+    print(f"applying: {action}")
+
+    cur = conn.cursor()
+    for row in needs_fix:
+        if invalidate_instead:
+            cur.execute(
+                "UPDATE entities SET status = 'invalid', "
+                "updated_at = CURRENT_TIMESTAMP WHERE id = ?",
+                (row["id"],),
+            )
+            cur.execute(
+                "INSERT INTO memory_audit "
+                "(id, memory_id, action, actor, before_json, after_json, note, entity_kind) "
+                "VALUES (?, ?, 'invalidated', 'v1_0_backfill', ?, ?, ?, 'entity')",
+                (
+                    f"v10bf-{row['id'][:8]}-inv",
+                    row["id"],
+                    json.dumps({"status": row["status"]}),
+                    json.dumps({"status": "invalid"}),
+                    "V1-0 backfill: invalidated, no provenance",
+                ),
+            )
+        else:
+            cur.execute(
+                "UPDATE entities SET hand_authored = 1, "
+                "updated_at = CURRENT_TIMESTAMP WHERE id = ?",
+                (row["id"],),
+            )
+            cur.execute(
+                "INSERT INTO memory_audit "
+                "(id, memory_id, action, actor, before_json, after_json, note, entity_kind) "
+                "VALUES (?, ?, 'hand_authored_flagged', 'v1_0_backfill', ?, ?, ?, 'entity')",
+                (
+                    f"v10bf-{row['id'][:8]}-ha",
+                    row["id"],
+                    json.dumps({"hand_authored": False}),
+                    json.dumps({"hand_authored": True}),
+                    "V1-0 backfill: flagged hand_authored since source_refs empty",
+                ),
+            )
+
+    conn.commit()
+    print(f"done: updated {len(needs_fix)} entities")
+    return 0
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "--db",
+        type=Path,
+        default=Path("data/db/atocore.db"),
+        help="Path to the SQLite database (default: data/db/atocore.db)",
+    )
+    parser.add_argument("--dry-run", action="store_true", help="Report only; no writes")
+    parser.add_argument(
+        "--invalidate-instead",
+        action="store_true",
+        help=(
+            "DESTRUCTIVE. Invalidate active rows with no provenance instead "
+            "of flagging them hand_authored. Scoped to status='active' only "
+            "(superseded rows are left alone to preserve audit history). "
+            "Not recommended for first run — start with --dry-run, then "
+            "the default hand_authored flag path."
+        ),
+    )
+    args = parser.parse_args()
+    return run(args.db, args.dry_run, args.invalidate_instead)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

src/atocore/api/routes.py

@@ -1457,6 +1457,11 @@ class EntityCreateRequest(BaseModel):
     status: str = "active"
     confidence: float = 1.0
     source_refs: list[str] | None = None
+    # V1-0 provenance enforcement (F-8). Clients must either pass
+    # non-empty source_refs or set hand_authored=true. The service layer
+    # raises ValueError otherwise, surfaced here as 400.
+    hand_authored: bool = False
+    extractor_version: str | None = None
 
 
 class EntityPromoteRequest(BaseModel):
@@ -1486,6 +1491,8 @@ def api_create_entity(req: EntityCreateRequest) -> dict:
             confidence=req.confidence,
             source_refs=req.source_refs,
             actor="api-http",
+            hand_authored=req.hand_authored,
+            extractor_version=req.extractor_version,
         )
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
@@ -2180,12 +2187,17 @@ def api_promote_entity(
     from atocore.engineering.service import promote_entity
     target_project = req.target_project if req is not None else None
     note = req.note if req is not None else ""
-    success = promote_entity(
+    try:
-        entity_id,
+        success = promote_entity(
-        actor="api-http",
+            entity_id,
-        note=note,
+            actor="api-http",
-        target_project=target_project,
+            note=note,
-    )
+            target_project=target_project,
+        )
+    except ValueError as e:
+        # V1-0 F-8 re-check raises ValueError for no-provenance candidates
+        # (see service.promote_entity). Surface as 400, not 500.
+        raise HTTPException(status_code=400, detail=str(e))
     if not success:
         raise HTTPException(status_code=404, detail=f"Entity not found or not a candidate: {entity_id}")
     result = {"status": "promoted", "id": entity_id}

src/atocore/engineering/service.py

@@ -63,6 +63,12 @@ RELATIONSHIP_TYPES = [
 
 ENTITY_STATUSES = ["candidate", "active", "superseded", "invalid"]
 
+# V1-0: extractor version this module writes into new entity rows.
+# Per promotion-rules.md:268, every candidate must record the version of
+# the extractor that produced it so later re-evaluation is auditable.
+# Bump this when extraction logic materially changes.
+EXTRACTOR_VERSION = "v1.0.0"
+
 
 @dataclass
 class Entity:
@@ -77,6 +83,10 @@ class Entity:
     source_refs: list[str] = field(default_factory=list)
     created_at: str = ""
     updated_at: str = ""
+    # V1-0 shared-header fields per engineering-v1-acceptance.md:45.
+    extractor_version: str = ""
+    canonical_home: str = "entity"
+    hand_authored: bool = False
 
 
 @dataclass
@@ -103,10 +113,25 @@ def init_engineering_schema() -> None:
                 status TEXT NOT NULL DEFAULT 'active',
                 confidence REAL NOT NULL DEFAULT 1.0,
                 source_refs TEXT NOT NULL DEFAULT '[]',
+                extractor_version TEXT NOT NULL DEFAULT '',
+                canonical_home TEXT NOT NULL DEFAULT 'entity',
+                hand_authored INTEGER NOT NULL DEFAULT 0,
                 created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
                 updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
             )
         """)
+        # V1-0 (Engineering V1 completion): the three shared-header fields
+        # per engineering-v1-acceptance.md:45. Idempotent ALTERs for
+        # databases created before V1-0 land these columns without a full
+        # migration. Fresh DBs get them via the CREATE TABLE above; the
+        # ALTERs below are a no-op there.
+        from atocore.models.database import _column_exists  # late import; avoids cycle
+        if not _column_exists(conn, "entities", "extractor_version"):
+            conn.execute("ALTER TABLE entities ADD COLUMN extractor_version TEXT DEFAULT ''")
+        if not _column_exists(conn, "entities", "canonical_home"):
+            conn.execute("ALTER TABLE entities ADD COLUMN canonical_home TEXT DEFAULT 'entity'")
+        if not _column_exists(conn, "entities", "hand_authored"):
+            conn.execute("ALTER TABLE entities ADD COLUMN hand_authored INTEGER DEFAULT 0")
         conn.execute("""
             CREATE TABLE IF NOT EXISTS relationships (
                 id TEXT PRIMARY KEY,
@@ -149,6 +174,8 @@ def create_entity(
     confidence: float = 1.0,
     source_refs: list[str] | None = None,
     actor: str = "api",
+    hand_authored: bool = False,
+    extractor_version: str | None = None,
 ) -> Entity:
     if entity_type not in ENTITY_TYPES:
         raise ValueError(f"Invalid entity type: {entity_type}. Must be one of {ENTITY_TYPES}")
@@ -157,6 +184,21 @@ def create_entity(
     if not name or not name.strip():
         raise ValueError("Entity name must be non-empty")
 
+    refs = list(source_refs) if source_refs else []
+
+    # V1-0 (F-8 provenance enforcement, engineering-v1-acceptance.md:147):
+    # every new entity row must carry non-empty source_refs OR be explicitly
+    # flagged hand_authored. This is the non-negotiable invariant every
+    # later V1 phase depends on — without it, active entities can escape
+    # into the graph with no traceable origin. Raises at the write seam so
+    # the bug is impossible to introduce silently.
+    if not refs and not hand_authored:
+        raise ValueError(
+            "source_refs required: every entity must carry provenance "
+            "(source_chunk_id / source_interaction_id / kb_cad_export_id / ...) "
+            "or set hand_authored=True to explicitly flag a direct human write"
+        )
+
     # Phase 5: enforce project canonicalization contract at the write seam.
     # Aliases like "p04" become "p04-gigabit" so downstream reads stay
     # consistent with the registry.
@@ -165,18 +207,22 @@ def create_entity(
     entity_id = str(uuid.uuid4())
     now = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M:%S")
     props = properties or {}
-    refs = source_refs or []
+    ev = extractor_version if extractor_version is not None else EXTRACTOR_VERSION
 
     with get_connection() as conn:
         conn.execute(
             """INSERT INTO entities
                (id, entity_type, name, project, description, properties,
-                status, confidence, source_refs, created_at, updated_at)
+                status, confidence, source_refs,
-               VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
+                extractor_version, canonical_home, hand_authored,
+                created_at, updated_at)
+               VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
             (
                 entity_id, entity_type, name.strip(), project,
                 description, json.dumps(props), status, confidence,
-                json.dumps(refs), now, now,
+                json.dumps(refs),
+                ev, "entity", 1 if hand_authored else 0,
+                now, now,
             ),
         )
 
@@ -194,14 +240,31 @@ def create_entity(
             "project": project,
             "status": status,
             "confidence": confidence,
+            "hand_authored": hand_authored,
+            "extractor_version": ev,
         },
     )
 
+    # V1-0 (F-5 hook, engineering-v1-acceptance.md:99): synchronous
+    # conflict detection on any active-entity write. The promote path
+    # already had this hook (see promote_entity below); V1-0 adds it to
+    # direct-active creates so every active row — however it got that
+    # way — is checked. Fail-open per "flag, never block" rule in
+    # conflict-model.md:256: detector errors log but never fail the write.
+    if status == "active":
+        try:
+            from atocore.engineering.conflicts import detect_conflicts_for_entity
+            detect_conflicts_for_entity(entity_id)
+        except Exception as e:
+            log.warning("conflict_detection_failed", entity_id=entity_id, error=str(e))
+
     return Entity(
         id=entity_id, entity_type=entity_type, name=name.strip(),
         project=project, description=description, properties=props,
         status=status, confidence=confidence, source_refs=refs,
         created_at=now, updated_at=now,
+        extractor_version=ev, canonical_home="entity",
+        hand_authored=hand_authored,
     )
 
 
@@ -361,6 +424,20 @@ def promote_entity(
     if entity is None or entity.status != "candidate":
         return False
 
+    # V1-0 (F-8 provenance re-check at promote). The invariant must hold at
+    # BOTH create_entity AND promote_entity per the plan, because candidate
+    # rows can exist in the DB from before V1-0 (no enforcement at their
+    # create time) or can be inserted by code paths that bypass the service
+    # layer. Block any candidate with empty source_refs that is NOT flagged
+    # hand_authored from ever becoming active. Same error shape as the
+    # create-side check for symmetry.
+    if not (entity.source_refs or []) and not entity.hand_authored:
+        raise ValueError(
+            "source_refs required: cannot promote a candidate with no "
+            "provenance. Attach source_refs via PATCH /entities/{id}, "
+            "or flag hand_authored=true before promoting."
+        )
+
     if target_project is not None:
         new_project = (
             resolve_project_name(target_project) if target_project else ""
@@ -503,6 +580,22 @@ def supersede_entity(
                 superseded_by=superseded_by,
                 error=str(e),
             )
+
+        # V1-0 (F-5 hook on supersede, per plan's "every active-entity
+        # write path"). Supersede demotes `entity_id` AND adds a
+        # `supersedes` relationship rooted at the already-active
+        # `superseded_by`. That new edge can create a conflict the
+        # detector should catch synchronously. Fail-open per
+        # conflict-model.md:256.
+        try:
+            from atocore.engineering.conflicts import detect_conflicts_for_entity
+            detect_conflicts_for_entity(superseded_by)
+        except Exception as e:
+            log.warning(
+                "conflict_detection_failed",
+                entity_id=superseded_by,
+                error=str(e),
+            )
     return True
 
 
@@ -774,6 +867,15 @@ def get_entity_with_context(entity_id: str) -> dict | None:
 
 
 def _row_to_entity(row) -> Entity:
+    # V1-0 shared-header fields are optional on read — rows that predate
+    # V1-0 migration have NULL / missing values, so defaults kick in and
+    # older tests that build Entity() without the new fields keep passing.
+    # `row.keys()` lets us tolerate SQLite rows that lack the columns
+    # entirely (pre-migration sqlite3.Row).
+    keys = set(row.keys())
+    extractor_version = (row["extractor_version"] or "") if "extractor_version" in keys else ""
+    canonical_home = (row["canonical_home"] or "entity") if "canonical_home" in keys else "entity"
+    hand_authored = bool(row["hand_authored"]) if "hand_authored" in keys and row["hand_authored"] is not None else False
     return Entity(
         id=row["id"],
         entity_type=row["entity_type"],
@@ -786,6 +888,9 @@ def _row_to_entity(row) -> Entity:
         source_refs=json.loads(row["source_refs"] or "[]"),
         created_at=row["created_at"] or "",
         updated_at=row["updated_at"] or "",
+        extractor_version=extractor_version,
+        canonical_home=canonical_home,
+        hand_authored=hand_authored,
     )
 
 

src/atocore/engineering/wiki.py

@@ -391,6 +391,8 @@ def render_new_entity_form(name: str = "", project: str = "") -> str:
       entity_type: fd.get('entity_type'),
       project: fd.get('project') || '',
       description: fd.get('description') || '',
+      // V1-0: human writes via the wiki form are hand_authored by definition.
+      hand_authored: true,
     };
     try {
       const r = await fetch('/v1/entities', {

src/atocore/models/database.py

@@ -146,6 +146,28 @@ def _apply_migrations(conn: sqlite3.Connection) -> None:
         "CREATE INDEX IF NOT EXISTS idx_memories_graduated ON memories(graduated_to_entity_id)"
     )
 
+    # V1-0 (Engineering V1 completion): shared header fields per
+    # engineering-v1-acceptance.md:45. Three columns on `entities`:
+    # - extractor_version: which extractor produced this row. Lets old
+    #   candidates be re-evaluated with a newer extractor per
+    #   promotion-rules.md:268.
+    # - canonical_home: which layer holds the canonical record. Always
+    #   "entity" for rows written via create_entity; reserved for future
+    #   cross-layer bookkeeping.
+    # - hand_authored: 1 when the row was created directly by a human
+    #   without source provenance. Enforced by the write path so every
+    #   non-hand-authored row must carry non-empty source_refs (F-8).
+    # The entities table itself is created by init_engineering_schema
+    # (see engineering/service.py); these ALTERs cover existing DBs
+    # where the original CREATE TABLE predates V1-0.
+    if _table_exists(conn, "entities"):
+        if not _column_exists(conn, "entities", "extractor_version"):
+            conn.execute("ALTER TABLE entities ADD COLUMN extractor_version TEXT DEFAULT ''")
+        if not _column_exists(conn, "entities", "canonical_home"):
+            conn.execute("ALTER TABLE entities ADD COLUMN canonical_home TEXT DEFAULT 'entity'")
+        if not _column_exists(conn, "entities", "hand_authored"):
+            conn.execute("ALTER TABLE entities ADD COLUMN hand_authored INTEGER DEFAULT 0")
+
     # Phase 4 (Robustness V1): append-only audit log for memory mutations.
     # Every create/update/promote/reject/supersede/invalidate/reinforce/expire/
     # auto_promote writes one row here. before/after are JSON snapshots of the
@@ -352,6 +374,14 @@ def _column_exists(conn: sqlite3.Connection, table: str, column: str) -> bool:
     return any(row["name"] == column for row in rows)
 
 
+def _table_exists(conn: sqlite3.Connection, table: str) -> bool:
+    row = conn.execute(
+        "SELECT name FROM sqlite_master WHERE type='table' AND name=?",
+        (table,),
+    ).fetchone()
+    return row is not None
+
+
 @contextmanager
 def get_connection() -> Generator[sqlite3.Connection, None, None]:
     """Get a database connection with row factory."""

tests/conftest.py

@@ -16,6 +16,36 @@ os.environ["ATOCORE_DATA_DIR"] = _default_test_dir
 os.environ["ATOCORE_DEBUG"] = "true"
 
 
+# V1-0: every entity created in a test is "hand authored" by the test
+# author — fixture data, not extracted content. Rather than rewrite 100+
+# existing test call sites, wrap create_entity so that tests which don't
+# provide source_refs get hand_authored=True automatically. Tests that
+# explicitly pass source_refs or hand_authored are unaffected. This keeps
+# the F-8 invariant enforced in production (the API, the wiki form, and
+# graduation scripts all go through the unwrapped function) while leaving
+# the existing test corpus intact.
+def _patch_create_entity_for_tests():
+    from atocore.engineering import service as _svc
+
+    _original = _svc.create_entity
+
+    def _create_entity_test(*args, **kwargs):
+        # Only auto-flag when hand_authored isn't explicitly specified.
+        # Tests that want to exercise the F-8 raise path pass
+        # hand_authored=False explicitly and should hit the error.
+        if (
+            not kwargs.get("source_refs")
+            and "hand_authored" not in kwargs
+        ):
+            kwargs["hand_authored"] = True
+        return _original(*args, **kwargs)
+
+    _svc.create_entity = _create_entity_test
+
+
+_patch_create_entity_for_tests()
+
+
 @pytest.fixture
 def tmp_data_dir(tmp_path):
     """Provide a temporary data directory for tests."""

tests/test_engineering_v1_phase5.py

@@ -143,8 +143,11 @@ def test_requirement_name_conflict_detected(tmp_data_dir):
     r2 = create_entity("requirement", "Surface figure < 25nm",
                       project="p-test", description="Different interpretation")
 
-    detected = detect_conflicts_for_entity(r2.id)
+    # V1-0 synchronous hook: the conflict is already detected at r2's
-    assert len(detected) == 1
+    # create-time, so a redundant detect call returns [] due to
+    # _record_conflict dedup. Assert on list_open_conflicts instead —
+    # that's what the intent of this test really tests: duplicate
+    # active requirements surface as an open conflict.
     conflicts = list_open_conflicts(project="p-test")
     assert any(c["slot_kind"] == "requirement.name" for c in conflicts)
 
@@ -191,8 +194,12 @@ def test_conflict_resolution_dismiss_leaves_entities_alone(tmp_data_dir):
                       description="first meaning")
     r2 = create_entity("requirement", "Dup req", project="p-test",
                       description="second meaning")
-    detected = detect_conflicts_for_entity(r2.id)
+    # V1-0 synchronous hook already recorded the conflict at r2's
-    conflict_id = detected[0]
+    # create-time. Look it up via list_open_conflicts rather than
+    # calling the detector again (which returns [] due to dedup).
+    open_list = list_open_conflicts(project="p-test")
+    assert open_list, "expected conflict recorded by create-time hook"
+    conflict_id = open_list[0]["id"]
 
     assert resolve_conflict(conflict_id, "dismiss")
     # Both still active — dismiss just clears the conflict marker

tests/test_inbox_crossproject.py

@@ -132,6 +132,7 @@ def test_api_post_entity_with_null_project_stores_global(seeded_db):
         "entity_type": "material",
         "name": "Titanium",
         "project": None,
+        "hand_authored": True,  # V1-0 F-8: test fixture, no source_refs
     })
     assert r.status_code == 200
 

tests/test_v1_0_write_invariants.py

@@ -0,0 +1,398 @@
+"""V1-0 write-time invariant tests.
+
+Covers the Engineering V1 completion plan Phase V1-0 acceptance:
+- F-1 shared-header fields: extractor_version + canonical_home + hand_authored
+  land in the entities table with working defaults
+- F-8 provenance enforcement: create_entity raises without source_refs
+  unless hand_authored=True
+- F-5 synchronous conflict-detection hook on any active-entity write
+  (create_entity with status="active" + the pre-existing promote_entity
+  path); fail-open per conflict-model.md:256
+- Q-3 "flag, never block": a conflict never 4xx-blocks the write
+- Q-4 partial trust: get_entities scope_only filters candidates out
+
+Plan: docs/plans/engineering-v1-completion-plan.md
+Spec: docs/architecture/engineering-v1-acceptance.md
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from atocore.engineering.service import (
+    EXTRACTOR_VERSION,
+    create_entity,
+    create_relationship,
+    get_entities,
+    get_entity,
+    init_engineering_schema,
+    promote_entity,
+    supersede_entity,
+)
+from atocore.models.database import get_connection, init_db
+
+
+# ---------- F-1: shared-header fields ----------
+
+
+def test_entity_row_has_shared_header_fields(tmp_data_dir):
+    init_db()
+    init_engineering_schema()
+    with get_connection() as conn:
+        cols = {row["name"] for row in conn.execute("PRAGMA table_info(entities)").fetchall()}
+    assert "extractor_version" in cols
+    assert "canonical_home" in cols
+    assert "hand_authored" in cols
+
+
+def test_created_entity_has_default_extractor_version_and_canonical_home(tmp_data_dir):
+    init_db()
+    init_engineering_schema()
+    e = create_entity(
+        entity_type="component",
+        name="Pivot Pin",
+        project="p04-gigabit",
+        source_refs=["test:fixture"],
+    )
+    assert e.extractor_version == EXTRACTOR_VERSION
+    assert e.canonical_home == "entity"
+    assert e.hand_authored is False
+
+    # round-trip through get_entity to confirm the row mapper returns
+    # the same values (not just the return-by-construct path)
+    got = get_entity(e.id)
+    assert got is not None
+    assert got.extractor_version == EXTRACTOR_VERSION
+    assert got.canonical_home == "entity"
+    assert got.hand_authored is False
+
+
+def test_explicit_extractor_version_is_persisted(tmp_data_dir):
+    init_db()
+    init_engineering_schema()
+    e = create_entity(
+        entity_type="decision",
+        name="Pick GF-PTFE pads",
+        project="p04-gigabit",
+        source_refs=["interaction:abc"],
+        extractor_version="custom-v2.3",
+    )
+    got = get_entity(e.id)
+    assert got.extractor_version == "custom-v2.3"
+
+
+# ---------- F-8: provenance enforcement ----------
+
+
+def test_create_entity_without_provenance_raises(tmp_data_dir):
+    init_db()
+    init_engineering_schema()
+    with pytest.raises(ValueError, match="source_refs required"):
+        create_entity(
+            entity_type="component",
+            name="No Provenance",
+            project="p04-gigabit",
+            hand_authored=False,  # explicit — bypasses the test-conftest auto-flag
+        )
+
+
+def test_create_entity_with_hand_authored_needs_no_source_refs(tmp_data_dir):
+    init_db()
+    init_engineering_schema()
+    e = create_entity(
+        entity_type="component",
+        name="Human Entry",
+        project="p04-gigabit",
+        hand_authored=True,
+    )
+    assert e.hand_authored is True
+    got = get_entity(e.id)
+    assert got.hand_authored is True
+    # source_refs stays empty — the hand_authored flag IS the provenance
+    assert got.source_refs == []
+
+
+def test_create_entity_with_empty_source_refs_list_is_treated_as_missing(tmp_data_dir):
+    init_db()
+    init_engineering_schema()
+    with pytest.raises(ValueError, match="source_refs required"):
+        create_entity(
+            entity_type="component",
+            name="Empty Refs",
+            project="p04-gigabit",
+            source_refs=[],
+            hand_authored=False,
+        )
+
+
+def test_promote_rejects_legacy_candidate_without_provenance(tmp_data_dir):
+    """Regression (Codex V1-0 probe): candidate rows can exist in the DB
+    from before V1-0 enforcement (or from paths that bypass create_entity).
+    promote_entity must re-check the invariant and refuse to flip a
+    no-provenance candidate to active. Without this check, the active
+    store can leak F-8 violations in from legacy data."""
+    init_db()
+    init_engineering_schema()
+
+    # Simulate a pre-V1-0 candidate by inserting directly into the table,
+    # bypassing the service-layer invariant. Real legacy rows look exactly
+    # like this: empty source_refs, hand_authored=0.
+    import uuid as _uuid
+    entity_id = str(_uuid.uuid4())
+    with get_connection() as conn:
+        conn.execute(
+            "INSERT INTO entities (id, entity_type, name, project, "
+            "description, properties, status, confidence, source_refs, "
+            "extractor_version, canonical_home, hand_authored, "
+            "created_at, updated_at) "
+            "VALUES (?, 'component', 'Legacy Orphan', 'p04-gigabit', "
+            "'', '{}', 'candidate', 1.0, '[]', '', 'entity', 0, "
+            "CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)",
+            (entity_id,),
+        )
+
+    with pytest.raises(ValueError, match="source_refs required"):
+        promote_entity(entity_id)
+
+    # And the row stays a candidate — no half-transition.
+    got = get_entity(entity_id)
+    assert got is not None
+    assert got.status == "candidate"
+
+
+def test_api_promote_returns_400_on_legacy_no_provenance(tmp_data_dir):
+    """R14 (Codex, 2026-04-22): the HTTP promote route must translate
+    the V1-0 ValueError for no-provenance candidates into 400, not 500.
+    Previously the route didn't catch ValueError so legacy bad
+    candidates surfaced as a server error."""
+    init_db()
+    init_engineering_schema()
+
+    import uuid as _uuid
+    from fastapi.testclient import TestClient
+    from atocore.main import app
+
+    entity_id = str(_uuid.uuid4())
+    with get_connection() as conn:
+        conn.execute(
+            "INSERT INTO entities (id, entity_type, name, project, "
+            "description, properties, status, confidence, source_refs, "
+            "extractor_version, canonical_home, hand_authored, "
+            "created_at, updated_at) "
+            "VALUES (?, 'component', 'Legacy HTTP', 'p04-gigabit', "
+            "'', '{}', 'candidate', 1.0, '[]', '', 'entity', 0, "
+            "CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)",
+            (entity_id,),
+        )
+
+    client = TestClient(app)
+    r = client.post(f"/entities/{entity_id}/promote")
+    assert r.status_code == 400
+    assert "source_refs required" in r.json().get("detail", "")
+
+    # Row still candidate — the 400 didn't half-transition.
+    got = get_entity(entity_id)
+    assert got is not None
+    assert got.status == "candidate"
+
+
+def test_promote_accepts_candidate_flagged_hand_authored(tmp_data_dir):
+    """The other side of the promote re-check: hand_authored=1 with
+    empty source_refs still lets promote succeed, matching
+    create_entity's symmetry."""
+    init_db()
+    init_engineering_schema()
+
+    import uuid as _uuid
+    entity_id = str(_uuid.uuid4())
+    with get_connection() as conn:
+        conn.execute(
+            "INSERT INTO entities (id, entity_type, name, project, "
+            "description, properties, status, confidence, source_refs, "
+            "extractor_version, canonical_home, hand_authored, "
+            "created_at, updated_at) "
+            "VALUES (?, 'component', 'Hand Authored Candidate', "
+            "'p04-gigabit', '', '{}', 'candidate', 1.0, '[]', '', "
+            "'entity', 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)",
+            (entity_id,),
+        )
+
+    assert promote_entity(entity_id) is True
+    assert get_entity(entity_id).status == "active"
+
+
+# ---------- F-5: synchronous conflict-detection hook ----------
+
+
+def test_active_create_runs_conflict_detection_hook(tmp_data_dir, monkeypatch):
+    """status=active writes trigger detect_conflicts_for_entity."""
+    init_db()
+    init_engineering_schema()
+
+    called_with: list[str] = []
+
+    def _fake_detect(entity_id: str):
+        called_with.append(entity_id)
+        return []
+
+    import atocore.engineering.conflicts as conflicts_mod
+    monkeypatch.setattr(conflicts_mod, "detect_conflicts_for_entity", _fake_detect)
+
+    e = create_entity(
+        entity_type="component",
+        name="Active With Hook",
+        project="p04-gigabit",
+        source_refs=["test:hook"],
+        status="active",
+    )
+
+    assert called_with == [e.id]
+
+
+def test_supersede_runs_conflict_detection_on_new_active(tmp_data_dir, monkeypatch):
+    """Regression (Codex V1-0 probe): per plan's 'every active-entity
+    write path', supersede_entity must trigger synchronous conflict
+    detection. The subject is the `superseded_by` entity — the one
+    whose graph state just changed because a new `supersedes` edge was
+    rooted at it."""
+    init_db()
+    init_engineering_schema()
+
+    old = create_entity(
+        entity_type="component",
+        name="Old Pad",
+        project="p04-gigabit",
+        source_refs=["test:old"],
+        status="active",
+    )
+    new = create_entity(
+        entity_type="component",
+        name="New Pad",
+        project="p04-gigabit",
+        source_refs=["test:new"],
+        status="active",
+    )
+
+    called_with: list[str] = []
+
+    def _fake_detect(entity_id: str):
+        called_with.append(entity_id)
+        return []
+
+    import atocore.engineering.conflicts as conflicts_mod
+    monkeypatch.setattr(conflicts_mod, "detect_conflicts_for_entity", _fake_detect)
+
+    assert supersede_entity(old.id, superseded_by=new.id) is True
+
+    # The detector fires on the `superseded_by` entity — the one whose
+    # edges just grew a new `supersedes` relationship.
+    assert new.id in called_with
+
+
+def test_supersede_hook_fails_open(tmp_data_dir, monkeypatch):
+    """Supersede must survive a broken detector per Q-3 flag-never-block."""
+    init_db()
+    init_engineering_schema()
+
+    old = create_entity(
+        entity_type="component", name="Old2", project="p04-gigabit",
+        source_refs=["test:old"], status="active",
+    )
+    new = create_entity(
+        entity_type="component", name="New2", project="p04-gigabit",
+        source_refs=["test:new"], status="active",
+    )
+
+    def _boom(entity_id: str):
+        raise RuntimeError("synthetic detector failure")
+
+    import atocore.engineering.conflicts as conflicts_mod
+    monkeypatch.setattr(conflicts_mod, "detect_conflicts_for_entity", _boom)
+
+    # The supersede still succeeds despite the detector blowing up.
+    assert supersede_entity(old.id, superseded_by=new.id) is True
+    assert get_entity(old.id).status == "superseded"
+
+
+def test_candidate_create_does_not_run_conflict_hook(tmp_data_dir, monkeypatch):
+    """status=candidate writes do NOT trigger detection — the hook is
+    for active rows only, per V1-0 scope. Candidates are checked at
+    promote time."""
+    init_db()
+    init_engineering_schema()
+
+    called: list[str] = []
+
+    def _fake_detect(entity_id: str):
+        called.append(entity_id)
+        return []
+
+    import atocore.engineering.conflicts as conflicts_mod
+    monkeypatch.setattr(conflicts_mod, "detect_conflicts_for_entity", _fake_detect)
+
+    create_entity(
+        entity_type="component",
+        name="Candidate No Hook",
+        project="p04-gigabit",
+        source_refs=["test:cand"],
+        status="candidate",
+    )
+
+    assert called == []
+
+
+# ---------- Q-3: flag, never block ----------
+
+
+def test_conflict_detector_failure_does_not_block_write(tmp_data_dir, monkeypatch):
+    """Per conflict-model.md:256: detection errors must not fail the
+    write. The entity is still created; only a warning is logged."""
+    init_db()
+    init_engineering_schema()
+
+    def _boom(entity_id: str):
+        raise RuntimeError("synthetic detector failure")
+
+    import atocore.engineering.conflicts as conflicts_mod
+    monkeypatch.setattr(conflicts_mod, "detect_conflicts_for_entity", _boom)
+
+    # The write still succeeds — no exception propagates.
+    e = create_entity(
+        entity_type="component",
+        name="Hook Fails Open",
+        project="p04-gigabit",
+        source_refs=["test:failopen"],
+        status="active",
+    )
+    assert get_entity(e.id) is not None
+
+
+# ---------- Q-4 (partial): trust-hierarchy — scope_only filters candidates ----------
+
+
+def test_scope_only_active_does_not_return_candidates(tmp_data_dir):
+    """V1-0 partial Q-4: active-scoped listing never returns candidates.
+    Full trust-hierarchy coverage (no-auto-project-state, etc.) ships in
+    V1-E per plan."""
+    init_db()
+    init_engineering_schema()
+
+    active = create_entity(
+        entity_type="component",
+        name="Active Alpha",
+        project="p04-gigabit",
+        source_refs=["test:alpha"],
+        status="active",
+    )
+    candidate = create_entity(
+        entity_type="component",
+        name="Candidate Beta",
+        project="p04-gigabit",
+        source_refs=["test:beta"],
+        status="candidate",
+    )
+
+    listed = get_entities(project="p04-gigabit", status="active", scope_only=True)
+    ids = {e.id for e in listed}
+    assert active.id in ids
+    assert candidate.id not in ids