fix(R6): fall back to interaction.project when LLM returns empty

Codex R6: the LLM extractor accepted the model's project field
verbatim. When the model returned empty string, clearly p06 memories
got promoted as project='', making them invisible to the p06
project-memory band and explaining the p06-offline-design harness
failure.

Fix: if model returns empty project but interaction.project is set,
inherit the interaction's project. Model-supplied project still takes
precedence when non-empty.

Two new tests lock the fallback and precedence behaviors.
R5 acknowledged (LLM extractor not yet wired into API — next task).

Test count: 278 -> 280. Harness re-run pending after deploy.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

DEV-LEDGER.md

@@ -124,8 +124,8 @@ One branch `codex/extractor-eval-loop` for Day 1-5, a second `codex/retrieval-ha
 | R2  | Codex  | P1       | src/atocore/context/builder.py     | Project memories excluded from pack                                     | fixed        | Claude | 2026-04-11 | 8ea53f4     |
 | R3  | Claude | P2       | src/atocore/memory/extractor.py    | Rule cues (`## Decision:`) never fire on conversational LLM text        | open         | Claude | 2026-04-11 |             |
 | R4  | Codex  | P2       | DEV-LEDGER.md:11                   | Orientation `main_tip` was stale versus `HEAD` / `origin/main`          | fixed        | Codex  | 2026-04-11 | 81307ce     |
-| R5  | Codex  | P1       | src/atocore/interactions/service.py:157-174 | The deployed extraction path still calls only the rule extractor; the new LLM extractor is eval/script-only, so Day 4 "gate cleared" is true as a benchmark result but not as an operational extraction path | open         | Claude | 2026-04-12 |             |
+| R5  | Codex  | P1       | src/atocore/interactions/service.py:157-174 | The deployed extraction path still calls only the rule extractor; the new LLM extractor is eval/script-only, so Day 4 "gate cleared" is true as a benchmark result but not as an operational extraction path | acknowledged | Claude | 2026-04-12 |             |
-| R6  | Codex  | P1       | src/atocore/memory/extractor_llm.py:258-276 | LLM extraction accepts model-supplied `project` verbatim with no fallback to `interaction.project`; live triage promoted a clearly p06 memory (offline/network rule) as project=`""`, which explains the p06-offline-design harness miss and falsifies the current "all 3 failures are budget-contention" claim | open         | Claude | 2026-04-12 |             |
+| R6  | Codex  | P1       | src/atocore/memory/extractor_llm.py:258-276 | LLM extraction accepts model-supplied `project` verbatim with no fallback to `interaction.project`; live triage promoted a clearly p06 memory (offline/network rule) as project=`""`, which explains the p06-offline-design harness miss and falsifies the current "all 3 failures are budget-contention" claim | fixed        | Claude | 2026-04-12 | this commit |
 | R7  | Codex  | P2       | src/atocore/memory/service.py:448-459 | Query ranking is overlap-count only, so broad overview memories can tie exact low-confidence memories and win on confidence; p06-firmware-interface is not just budget pressure, it also exposes a weak lexical scorer | open         | Claude | 2026-04-12 |             |
 | R8  | Codex  | P2       | tests/test_extractor_llm.py:1-7    | LLM extractor tests stop at parser/failure contracts; there is no automated coverage for the script-only persistence/review path that produced the 16 promoted memories, including project-scope preservation | open         | Claude | 2026-04-12 |             |
 

src/atocore/memory/extractor_llm.py

@@ -256,6 +256,8 @@ def _parse_candidates(raw_output: str, interaction: Interaction) -> list[MemoryC
         mem_type = str(item.get("type") or "").strip().lower()
         content = str(item.get("content") or "").strip()
         project = str(item.get("project") or "").strip()
+        if not project and interaction.project:
+            project = interaction.project
         confidence_raw = item.get("confidence", 0.5)
         if mem_type not in MEMORY_TYPES:
             continue

tests/test_extractor_llm.py

@@ -97,6 +97,25 @@ def test_parser_tags_version_and_rule():
     assert result[0].source_interaction_id == "test-id"
 
 
+def test_parser_falls_back_to_interaction_project():
+    """R6: when the model returns empty project but the interaction
+    has one, the candidate should inherit the interaction's project."""
+    raw = '[{"type": "project", "content": "machine works offline"}]'
+    interaction = _make_interaction()
+    interaction.project = "p06-polisher"
+    result = _parse_candidates(raw, interaction)
+    assert result[0].project == "p06-polisher"
+
+
+def test_parser_keeps_model_project_when_provided():
+    """Model-supplied project takes precedence over interaction."""
+    raw = '[{"type": "project", "content": "x", "project": "p04-gigabit"}]'
+    interaction = _make_interaction()
+    interaction.project = "p06-polisher"
+    result = _parse_candidates(raw, interaction)
+    assert result[0].project == "p04-gigabit"
+
+
 def test_missing_cli_returns_empty(monkeypatch):
     """If ``claude`` is not on PATH the extractor returns empty, never raises."""
     monkeypatch.setattr(extractor_llm, "_cli_available", lambda: False)