P28-02-EQ: 意味を保つ軽量化：同等性の先行固定（harness）

docs/plans/original-completion-2026-10-02/execution/p28-02/eq/PROGRESS.md

@@ -1,4 +1,48 @@
-# P28-02-EQ progress — S4 retained completion r03
+# P28-02-EQ progress — S5 (repair 10, Claude Opus 5.5 Desktop implementation)
+
+Implementer: Claude Opus 5.5 in the Desktop control session, by the user's delegation
+("Codexの使用量上限いきそうなので、作業をひきとって"; Root relayed 「実装担当含めOpusに委任」).
+The registered contract keeps worker codex; no Codex/Astra run was started for this stage.
+Submission goes through the normal Runner submit, which makes the commit. 正式受入は保留、原本加算0。
+
+- Exact-S native of 6f75c9a failed in R-A (user://evidence mkdir) and stays a failure; the
+  owner intake recorded it and the normal repair made repairs 10.
+- Fixed the harness defects that only the real engine showed (evidence mkdir under the guard,
+  typed script metadata, manifest/guard JSON floats, signed instance IDs, large E4 returns) and
+  recorded the product's event-stream replacement on restore as an existing defect while the
+  probe keeps capturing every event (EQ_S5_SCALE_PLAN r02 §3-4).
+- Content-addressed gzip blobs and exact Python fast paths keep R and O at full E1-E5 scope
+  (39 scenarios each) within the unchanged 1800 s phase and 300 s validation limits.
+- Scratchpad diagnostics with the same guard and HOME redirected (not formal evidence):
+  see the S5 section of IMPLEMENTATION.md for measured times and sizes.
+- Unit evidence (engine-free `python3 -B test_eq.py`; full raw outputs with SHA files):
+  - UNIT_OUTPUT_S5_ATTEMPT_01: 146 tests, 9 failures and 5 errors (the S5 evidence format
+    against old fixtures and one old static snippet list). Kept as a failure.
+  - UNIT_OUTPUT_S5_ATTEMPT_02: 156 tests OK in 211.416 s (run beside an R engine run).
+  - UNIT_OUTPUT_S5_ATTEMPT_03: 160 tests OK in 130.451 s, Python exit 0 (after the parallel
+    verifier fix). An intermediate full run failed once (160 tests, 1 error: closed worker
+    stdin); only its single-test rerun output was kept, and the fix is in phase_results.
+  - Class-targeted runs during development were displayed through tail and are not claimed
+    as retained raw results.
+  - UNIT_OUTPUT_S5_ATTEMPT_04: 151 tests, 3 errors, Python exit 1: the new differential test
+    imported random, outside the closed EQ import list, so the driver's closure check rejected
+    test_eq.py. The test now uses its own deterministic generator; the list is unchanged.
+  - UNIT_OUTPUT_S5_ATTEMPT_05 (final, all changes included): 161 tests OK in 121.627 s,
+    Python exit 0, outer 121.748 s; same bytes as UNIT_OUTPUT.txt,
+    SHA-256 7372a382cc2f3c090013874d8f28f17cad4cb1b965ad86c86de7a21fc2d851a8.
+- Test bodies changed for the S5 format, each recorded here: E3 evidence and E4 restore/load
+  details carry event_stream; the S4 phase fixture lifecycle is S5; the S2 static list names
+  transport(snapshot_value) instead of the removed diff-chain snippet; s2_report signals carry
+  event_counter/command_counter and its runtime next_command_id; the E4/E5 fixture emits the
+  product's publishes; the accepted-restore E3 test adds the restore publish; the E4 load
+  fixture event uses a domain_event ID. All other earlier test bodies and raw outputs are
+  unchanged; 15 S5 tests were added.
+
+Next: Runner submit → exact-S native 7 phases → bundle → p28-02-eq-unit and
+p28-02-eq-native-verify → fresh independent Opus review of all 6 conditions → normal
+qualification, approval, integration and final → OPT/whole-unit. 23/88、4/30は不変。
+
+## Retained S4 r03 progress (unchanged historical text)
 
 S4 の保持済み実装に対する残作業を完了し、局所unitの証拠として提出する。
 正式受入は保留、原本加算0。