docs(reports): archive Issue #3 analysis, implementation plan, and multi-agent peer review reports

- Add Rev. 3 technical analysis report from creator-agy-01 - Add implementation plan from planner-reviewer-claude-01 - Add peer review reports across analysis and implementation review loops (Claude, Grok, OpenCode)
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+# 🔍 Cross-Review — Issue #3 Technical Analysis Report Rev. 3 (Job `9406c304`)
+
+- **Reviewer**: `planner-reviewer-claude-01`
+- **Target**: `.agents/reports/creator-agy-01/issue-3-analysis.md` (Rev. 3, job `6b391a80`, incorporating my own `0338e7de` NOT PASS and `reviewer-opencode-01`'s `7b6c16df` NOT PASS on Rev. 2) + `report-7b6c16df.md` (already-committed-to-diff OpenCode review) + `report-8c093047.md` (unchanged, previously reviewed). No code changes — analysis-only scope, correctly honored (`git status` shows only these report files).
+- **Method**: did not accept "the correction was made" at face value — independently re-verified every Rev. 3 claim against live source and by re-running the actual code/tests, and cross-checked the job-registry chronology OpenCode's report cites against the real `.events.log` files.
+
+---
+
+## 1. Item 1 (`setsid`/PGID) — unchanged, reconfirmed a third time
+
+No material change from Rev. 2. I re-ran the live process-table check myself again:
+```
+PID 7623  PGID 7526  PPID 1  TTY ttys001  /opt/homebrew/bin/herdr --session multi-agent-mux server
+```
+Identical to what I found in `7e62abfd` and `0338e7de`, and to what OpenCode reports in `7b6c16df`. `command -v setsid` still fails on this host. **CONFIRMED (HIGH)** stands — now verified by me on three separate occasions plus OpenCode's independent runs.
+
+## 2. Item 2 — Rev. 3 correctly implements the requested correction
+
+This is the substantive change from Rev. 2, and it directly addresses the factual error I identified in `0338e7de` (and which OpenCode independently and convergently identified in `report-7b6c16df.md`, itself part of this diff).
+
+**Class A (`agy`/`hermes`/`opencode`)**: unchanged mechanism, still correct — `session_id_source: pending-discovery`, null own-key, `resolve_session_id.sh` returns `""`, `resume_session.sh:54-57` hard exit RC=1. Severity now stated as **MEDIUM** (down from the prior MEDIUM-HIGH blanket claim) — reasonable, since it's now correctly scoped to 3 of 5 agents rather than implied as universal.
+
+**Class B (`claude`/`grok`)**: now correctly re-classified as **NOT A DEFECT**. I independently re-verified every link in the new chain:
+- `lib_py/verify_session.py:99-101` escape hatch quoted verbatim, matches live source exactly (re-confirmed).
+- The report now correctly cites `claude.py:97` for the materialized-check in `resume_spec`. I re-read the actual adapter (`lib_py/agents/adapters/claude.py:96-101`):
+  ```python
+  def resume_spec(self, binary, session_uuid, materialized=False):
+      if materialized and session_uuid:
+          return f"{binary} --dangerously-skip-permissions -r {session_uuid}"
+      elif session_uuid:
+          return f"{binary} --dangerously-skip-permissions --session-id {session_uuid}"
+      ...
+  ```
+  This exactly matches the report's claimed `CMD_FULL` output for the unmaterialized 0-turn case.
+- Re-ran `tests/test_uuid_target.py` in full (not just T-8): **12/12 passed**, matching the report's claim exactly, including `test_t8_resume_unmaterialized_assigned_id`.
+- §4's recommendation now correctly drops the Class B "fix" and explicitly says "Do NOT modify Class B" — this is the right outcome; a fix here would have risked breaking the existing escape hatch and its test contract, exactly as I and OpenCode both warned.
+
+## 3. Verification of `report-7b6c16df.md`'s supporting claims
+
+OpenCode's NOT PASS on Rev. 2 (included in this diff) independently reached the same conclusion I did in `0338e7de`, via a different method (their own seeded simulation plus re-running T-8), and additionally self-corrected their earlier `8c093047` PASS for not having exercised the Class B path. I checked their job-registry chronology table (§1) against the actual `.mam/jobs/*.events.log` files for all 8 cited job IDs (`0b34a0e5`, `1a4f5236`, `8c093047`, `842b96bf`, `0338e7de`, `9075a39f`, `7b6c16df`, plus `6b391a80` for Rev. 3) — every job ID is real, and every timestamp/outcome matches what their table claims. Their observation that Grok's `9075a39f` PASS verified "incorporates all 5 requested items" without re-running code to check the mechanism itself (so the Class B error, which originated in Grok's own `1a4f5236` required rewrite, passed through unnoticed) is a fair and evidenced characterization — worth carrying forward as a process note, not a blocking issue for this job.
+
+## 4. Lint / omissions
+
+No lint issues. No material omissions in Rev. 3 — the correction is precise and doesn't introduce new unverified claims. The Class A "Impact" paragraph (§3.1) is now appropriately hedged (describes the mechanism rather than asserting reconcilers hit it in production today), addressing the minor framing nit both I and OpenCode raised on earlier revisions.
+
+## 5. Verdict
+
+Rev. 3 correctly and precisely implements the correction requested across two independent NOT PASS reviews (mine and OpenCode's). Item 1 remains solid on its fourth independent verification. Item 2 is now accurately scoped: Class A is a confirmed real defect (MEDIUM), Class B is correctly reclassified as not-a-defect with both the mechanistic proof (`verify_session.py:99-101`) and empirical proof (`test_t8`, full 12/12 suite) cited. No factual errors found in this revision. The report is now a trustworthy analysis-and-determination deliverable per the job's brief.
+
+[VERDICT: PASS]