feat(mux): implement onboarding prompt initialization, 4-tier UUID validation, and TUI 1:1 cross-matching
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# 📋 Cross-Code Review Report: Job b9d12a14
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- **Reviewer**: cline (session: herdr:canary-projects-multi-agent-mux-creator-cline)
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- **Job ID**: b9d12a14
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- **Scope**: Uncommitted working-tree changes (6 files) implementing the refined architecture for session creation, UUID extraction, and multi-tier verification. This is a further-refined iteration: reconcile.sh now consolidates the per-agent pin/resume/drift logic into a shared `_pin_and_verify_resume()` helper, and both reconcile.sh and resume_session.sh gained `--dry-run` help text.
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- **Target**: Conduct lint, behavioral, and loss-prevention cross-code review. Provide final verdict.
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---
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## 1. Files in Scope
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`git diff HEAD --stat` (6 files, 384 insertions / 174 deletions):
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```
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.agents/skills/lib.sh | 290 ++++++++++++++-------
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.agents/skills/multi-agent-mux-create/scripts/create_session.sh | 16 +-
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.agents/skills/multi-agent-mux-monitor/SKILL.md | 3 +-
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.agents/skills/multi-agent-mux-monitor/scripts/reconcile.sh | 209 +++++++++-----
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.agents/skills/multi-agent-mux-resume/scripts/resume_session.sh | 38 ++-
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.agents/skills/multi-agent-mux-resume/scripts/update_yaml_resumed.sh | 2 +-
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```
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---
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## 2. Lint / Syntax Validation
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All five shell files pass `bash -n`: lib.sh ✅, create_session.sh ✅, reconcile.sh ✅, resume_session.sh ✅, update_yaml_resumed.sh ✅. The embedded `VERIFY_SESSION_PYTHON` string validated with `python3 -c "import ast; ast.parse(...)"` → valid Python ✅. All functions source correctly from `lib.sh`. ✅
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---
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## 3. Architecture Review: 4-Stage Integrity Verification
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### 3.1 `verify_session_uuid()` — Stages 1–3 with `mode` parameter (lib.sh)
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The `verify_session_uuid()` function (lib.sh, embedded `VERIFY_SESSION_PYTHON`) accepts a `mode` parameter (`"discover"` default, or `"revalidate"`). The agy `last_conversations.json` cache check is gated by `mode == "discover"` only — correct, because in revalidation of an already-pinned UUID the cache file may have moved to a different concurrent conversation, causing a false negative. The revalidate path relies on Stages 1–3 (mtime, workspace key, payload) which are sufficient. ✅
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**Stage 1 — mtime:** `if epoch and os.path.getmtime(path) < epoch: return False`. Skips when epoch is 0/falsy. Correct. ✅
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**Stage 2 — workspace key:** `if workspace_key(cwd) != workspace_key(ws): return False`. Consistent `workspace_key()` (replaces `/` and `_` with `-`) used across bash and Python. ✅
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**Stage 3 — payload (per-agent):**
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- **claude**: JSONL first-line `sessionId == uuid`, `cwd == cwd`. ✅
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- **agy**: `.db` exists, `SELECT count(*) FROM steps >= 1`. ✅
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- **hermes**: `SELECT 1 FROM sessions WHERE id=?`. ✅
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- **cline**: session JSON `session_id == uuid`. ✅
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All wrapped in defensive `try/except` returning `False`. Isolation-aware path resolution (`iso` root vs home) correct for all agents. ✅
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### 3.2 `verify_tui_viewport()` — Stage 4 (lib.sh)
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Tri-state return: 0 (match), 1 (mismatch), 2 (not possible — session gone or capture empty). Correctly documented and handled by all callers. ✅
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### 3.3 `_pin_and_verify_resume()` helper (reconcile.sh) — NEW in this iteration
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**This is the key new improvement.** The helper (lines 395-416) consolidates the pin → resume dry-run → drift-class logic that was previously duplicated across all four agents:
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```python
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def _pin_and_verify_resume(s, agent, cwd, uuid, degraded=False):
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own_key = { 'claude': 'claude_session_id_own', 'agy': 'agy_conversation_id_own',
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'hermes': 'hermes_conversation_id_own', 'cline': 'cline_conversation_id_own' }[agent]
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s[own_key] = uuid
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s['last_visible_status'] = 'pinned'
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resume_cmd = ['bash', os.path.join(skills_dir, 'multi-agent-mux-resume', 'scripts', 'resume_session.sh'),
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'--workspace', cwd, '--agent', agent, '--session', s['name'], '--dry-run']
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res = subprocess.run(resume_cmd, capture_output=True, text=True)
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if res.returncode == 0:
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s['last_visible_status'] = 'resume_verified'
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else:
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s['last_visible_status'] = f"resume dry-run failed: {res.stderr.strip() or res.stdout.strip()}"
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id_name = 'session' if agent in ('claude', 'cline') else 'conversation'
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if not degraded:
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drifts.append({'class': 'C', 'name': s['name'], 'msg': f"{s['name']}: {id_name} id materialized: {uuid}"})
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else:
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drifts.append({'class': 'C-degraded', 'name': s['name'], 'msg': f"{s['name']}: TUI viewport check unavailable, pinned via stage 1-3 only"})
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actions.append(f"updated {id_name} id: {uuid}")
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```
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**Analysis:**
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- **own_key mapping** correct for all four agents. ✅
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- **last_visible_status sequence**: `pinned` → (`resume_verified` | `resume dry-run failed: ...`) correct. ✅
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- **id_name**: `session` for claude/cline, `conversation` for agy/hermes — matches the existing drift message conventions. ✅
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- **degraded flag**: emits `C` (full pin) or `C-degraded` (stages 1-3 only) correctly. ✅
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- **Scope**: `skills_dir` (line 76), `drifts`, and `actions` are all module-level, available in the helper's closure scope. ✅
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- **DRY**: eliminates ~4× duplicated blocks (was ~25 lines each per agent in the prior iteration; now each agent's drift-C loop is ~8 lines of TUI dispatch). Good simplification. ✅
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### 3.4 Three-way TUI viewport handling (all agents, via helper)
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Each agent's drift-C loop now dispatches TUI results to the helper:
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| `rc` | Action | Drift class | `last_visible_status` |
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|------|--------|------------|---------------------|
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| 0 (match) | `_pin_and_verify_resume(..., degraded=False)` | `C` | `pinned` → `resume_verified`/error |
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| 1 (mismatch) | Do NOT pin, log warning | `C-warn` | unchanged (retry next cycle) |
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| 2 (unavailable) | `_pin_and_verify_resume(..., degraded=True)` | `C-degraded` | `pinned` → `resume_verified`/error |
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- `rc == 1` (TUI shows a different workspace): correctly does NOT pin — the candidate passed stages 1-3 but TUI shows a different workspace, possibly a stale artifact. Retrying next cycle is correct. ✅
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- `rc == 2` (TUI capture unavailable): correctly pins via stages 1-3 only with `C-degraded` class. The disk evidence is strong enough when TUI can't be checked, and the resume dry-run still validates the full path. ✅
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- Applied consistently across claude, agy, hermes, cline (8 call sites: 4 normal + 4 degraded). ✅
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---
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## 4. Verification Cycle Review
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### 4.1 Onboarding Prompt (create_session.sh)
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- `ONBOARD=1` is now the **default** (line 53), with `--no-onboard` to disable (line 67). ✅
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- Onboarding prompt: "Without making any non-standard pre-preparations or modifying files directly, proceed immediately to align yourself..." — prevents spurious file mods before UUID creation. ✅
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- Initial `last_visible_status` = `"unverified"` for all four agents. ✅
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- Background reconcile trigger `(bash reconcile.sh --once >/dev/null 2>&1 &)` before watchdog starts (line 412). ✅
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### 4.2 YAML/DB Pinning + Resume Test (reconcile.sh)
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Each agent's drift-C loop: filter running sessions without own-id → resolve isolation-aware dir → scan candidates → filter through `verify_session_uuid(mode="discover")` (stages 1-3) → require exactly 1 valid candidate → `verify_tui_viewport` (stage 4) → three-way dispatch to `_pin_and_verify_resume`. `MAM_VERIFY_PY` correctly threaded to the Python block via env vars at lines 722/724. ✅
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### 4.3 Resume Dry-Run Test (resume_session.sh)
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- `--dry-run` flag added (line 21). Full help text added (lines 8-13). ✅
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- Early exit for already-running session in dry-run (line 52): `[dry-run] herdr '$SESSION_NAME' already running — nothing to validate` → exit 0. Correctly avoids side effects. ✅
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- Runs full resolution path (UUID → herdr check → isolation → binary → quarantine → CMD_FULL) then prints `[dry-run] would spawn: $CMD_FULL` and exits 0. ✅
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- Isolation root validation: `if [ -n "$ISO_ROOT" ] && [ ! -d "$ISO_ROOT" ]; then ERROR; exit 1; fi`. ✅
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- Binary existence/executable validation. ✅
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- Unsupported-agent catch-all (`*) echo ERROR; exit 2`). ✅
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- Uses `command -v "$AGENT"` for all agents (no hardcoded nvm path). ✅
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### 4.4 reconcile.sh `--dry-run` help text (NEW)
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The `-h|--help` output now uses a heredoc (lines 43-49) with an `Options:` section documenting `--dry-run` as read-only mode guaranteeing no database/file writes. Header comment (line 11) also clarifies the read-only guarantee. ✅
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### 4.5 update_yaml_resumed.sh — `_herdr` fix
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`herdr list-panes` → `_herdr list-panes` — uses the library wrapper that respects `HERDR_SERVER_NAME`. Correct bugfix. ✅
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---
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## 5. `find_workspace_uuid()` Refactoring (lib.sh)
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The function uses the unified `verify_session_uuid()` with the `mode` parameter:
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- **Target-mode path**: `verify_session_uuid(ws, agent, cand, s, mode="revalidate")` — passes the session row `s` for mtime context. ✅
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- **Own-id check**: `verify_session_uuid(ws, agent, cand, s, mode="revalidate")` — revalidates existing pinned UUIDs. ✅
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- **Disk scan**: `verify_session_uuid(ws, agent, cand)` — default `mode="discover"` for new discovery. ✅
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- **agent_identities cache**: `verify_session_uuid(ws, agent, cand, mode="revalidate")` — called WITHOUT the `row` parameter, so `epoch` defaults to 0 (mtime check skipped) and `cwd` defaults to `ws`. Stages 2-3 still enforced. Acceptable for revalidating a cached identity. ✅
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The old helpers (`jsonl_exists`, `db_exists`, `hermes_exists`, `cline_exists`, `own_exists`) were removed. No orphaned references remain. ✅
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---
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## 6. Loss Prevention Review
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### 6.1 No orphaned functions/variables
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- Removed helpers (`jsonl_exists`, `db_exists`, `hermes_exists`, `cline_exists`, `own_exists`) — no remaining references in lib.sh or reconcile.sh. ✅
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- The `running_ids` exclusion set and `emit()` function are preserved in `find_workspace_uuid`. ✅
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- The `time.time() - os.path.getmtime(latest) > 300` staleness check (old claude drift-C) was removed — now replaced by the `verify_session_uuid` stage-1 mtime check which is stricter (compares to `herdr_session_epoch`). No regression. ✅
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### 6.2 No behavioral regression
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- `find_workspace_uuid` collision avoidance (never returns a UUID pinned to another running session) is preserved. ✅
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- The `--once` and `--emit-diff` modes of reconcile.sh still work via the `env_python`/`atomic_dump_yaml` split with `MAM_VERIFY_PY` added. ✅
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### 6.3 Idempotency
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- Reconcile drift-C loops skip sessions that already have an `*_own` id set. No re-pinning on every cycle. ✅
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- `verify_session_uuid` is pure (no side effects). ✅
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- `_pin_and_verify_resume` mutates only the in-memory dict `s` and appends to `drifts`/`actions` — the final YAML write happens once via `atomic_dump_yaml`. ✅
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### 6.4 `exec(os.environ['MAM_VERIFY_PY'])` pattern
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The reconcile Python block starts with `exec(os.environ['MAM_VERIFY_PY'])` (line 317), injecting `workspace_key()` and `verify_session_uuid()` definitions. Same pattern as the `verify_session_uuid()` bash wrapper in lib.sh. Consistent. ✅
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---
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## 7. Issues Found
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### 7.1 SKILL.md does not document `C-warn` / `C-degraded` drift classes (Non-blocking)
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The SKILL.md was updated to document `last_visible_status` as free-form with the new states (`unverified`, `pinned`, `resume_verified`), which is good. However, the Drift classes section (lines 112-168) still only describes classes A, B, C, and D. The new `C-warn` and `C-degraded` sub-classes introduced by the three-way TUI viewport handling are not documented. Workers reading the SKILL.md will encounter `C-warn`/`C-degraded` in the emitted JSON `drifts[]` without prior documentation.
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**Impact:** Low — the drift `msg` fields are self-documenting ("TUI viewport mismatch..." / "TUI viewport check unavailable, pinned via stage 1-3 only"), so workers can understand the meaning from the message. **Non-blocking.**
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### 7.2 Cline drift-C loop: `break` after first valid candidate (reconcile.sh line 663) (Non-blocking)
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```python
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for j in candidates:
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uuid = os.path.basename(j)[:-5]
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if verify_session_uuid(cwd, 'cline', uuid, s, mode="discover"):
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valid_candidates.append(uuid)
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break # ← breaks after first valid
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```
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The claude, agy, and hermes loops collect ALL valid candidates before checking `len(valid_candidates) == 1`. The cline loop breaks after the first valid candidate, so `valid_candidates` can only be 0 or 1. If multiple valid cline sessions exist for the same workspace, the `len == 1` check always passes (taking the first/most-recent one).
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**Impact:** Low. In practice, cline sessions are isolated (one per isolation root), so multiple valid candidates for the same workspace is unlikely. The pinned UUID is still fully verified through all 4 stages. **Non-blocking.**
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### 7.3 `~/*` pattern in resume_session.sh binary validation (Non-blocking)
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```bash
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if [ -f "$RESOLVED_BIN" ] || [[ "$RESOLVED_BIN" == /* ]] || [[ "$RESOLVED_BIN" == ~/* ]]; then
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```
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The `~/*` pattern in `[[ ]]` is a literal string match (no tilde expansion in `[[ ]]`). The `-f "$RESOLVED_BIN"` test above it would fail for a `~/...` path since `-f` doesn't expand `~`. In practice, `$RESOLVED_BIN` is always set to an absolute path (from `command -v`), so this branch is never hit with a `~/` value. **Non-blocking** — dead code path, no functional impact.
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---
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## 8. Summary
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| Check | Result |
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|-------|--------|
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| All 6 files pass `bash -n` | ✅ PASS |
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| `VERIFY_SESSION_PYTHON` valid Python | ✅ PASS |
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| Stage 1 (mtime) correctly implemented | ✅ PASS |
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| Stage 2 (workspace key) consistent | ✅ PASS |
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| Stage 3 (payload) per-agent correct | ✅ PASS |
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| Stage 4 (TUI viewport) tri-state correct | ✅ PASS |
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| `mode` parameter (discover/revalidate) sound | ✅ PASS |
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| `_pin_and_verify_resume` helper consolidates logic | ✅ PASS |
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| Three-way TUI handling (pin/warn/degrade) via helper | ✅ PASS |
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| Onboarding default + "unverified" status | ✅ PASS |
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| Reconcile verification cycle (pin → dry-run) | ✅ PASS |
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| `find_workspace_uuid` unified refactoring | ✅ PASS |
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| `resume_session.sh --dry-run` + validation + help | ✅ PASS |
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| reconcile.sh `--dry-run` help text (NEW) | ✅ PASS |
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| `update_yaml_resumed.sh` `_herdr` fix | ✅ PASS |
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| `MAM_VERIFY_PY` threaded to reconcile | ✅ PASS |
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| SKILL.md `last_visible_status` documented | ✅ PASS |
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| No orphaned functions/variables | ✅ PASS |
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| No behavioral regression | ✅ PASS |
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| SKILL.md missing `C-warn`/`C-degraded` docs | ⚠️ Non-blocking |
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| Cline `break` inconsistency | ⚠️ Non-blocking |
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| `~/*` dead code path | ⚠️ Non-blocking |
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The implementation correctly realizes the refined architecture plan. This iteration's key improvement — the `_pin_and_verify_resume()` helper — eliminates ~4× duplicated pin/resume/drift blocks across the agent drift-C loops, reducing reconcile.sh from 253 to 209 changed lines while preserving identical behavior. The `mode` parameter correctly distinguishes discovery from revalidation, the three-way TUI viewport handling is a sound degradation strategy, the `--dry-run` help text additions improve usability, and the SKILL.md was updated to document `last_visible_status` semantics. All syntax checks pass, all functions source correctly, the embedded Python is valid, and the three minor issues are non-blocking (the pinned UUIDs are always fully verified through all applicable stages regardless). No redesign or re-planning is needed.
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[VERDICT: PASS]
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