feat(cli,registry): introduce --herdr-workspace option and decouple socket fallback chains
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# Cross-Code Review Report — Job 7e474214
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- **Reviewer**: cline (session: herdr:canary-projects-multi-agent-mux-creator-cline)
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- **Job ID**: 7e474214
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- **Scope**: Cross-code review of the changeset introducing `--herdr-workspace` across MAM and decoupling legacy fallback chains (14 files, +531/−47 lines).
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- **Date**: 2026-08-24
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---
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## §0. Executive Summary
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The changeset introduces a `--herdr-workspace` CLI option across create/resume/stop scripts, decouples `resolve_herdr_session()` (socket/daemon name) from `resolve_herdr_workspace()` (workspace label), removes `herdr_workspace` from all 6 socket-lookup fallback chains, adds distinct SOCKET/WORKSPACE columns to `status.sh`, populates `herdr_workspace`/`herdr_server` in reconcile drift B auto-registration, and adds 27 new tests (20 unit + 7 component).
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**Verdict: PASS.** All 8 changed shell scripts pass `bash -n`. All 55 unit tests and all 7 changeset-specific component tests pass. The static guard test confirms no socket lookup falls back to `herdr_workspace`. One low-severity dead-code observation in `reconcile.sh:511` is noted (N-1) but does not block.
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---
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## §1. Files Reviewed
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| # | File | Change Type | `bash -n` |
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|---|------|-----------|-----------|
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| 1 | `.agents/skills/lib.sh` | Core decoupling: `resolve_herdr_session` / `resolve_herdr_workspace` split | ✅ PASS |
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| 2 | `.agents/skills/multi-agent-mux-create/scripts/create_session.sh` | `--herdr-workspace` parsing, env fallback, YAML serialization | ✅ PASS |
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| 3 | `.agents/skills/multi-agent-mux-resume/scripts/resume_session.sh` | `--herdr-workspace` forwarding (both call sites) | ✅ PASS |
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| 4 | `.agents/skills/multi-agent-mux-resume/scripts/update_yaml_resumed.sh` | `--herdr-workspace` parsing, conditional overwrite | ✅ PASS |
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| 5 | `.agents/skills/multi-agent-mux-stop/scripts/stop_session.sh` | `--herdr-workspace` in usage/parser (CLI symmetry, no-op) | ✅ PASS |
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| 6 | `.agents/skills/multi-agent-mux-status/scripts/status.sh` | SOCKET/WORKSPACE columns, `herdr_workspace` in JSON+table | ✅ PASS |
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| 7 | `.agents/skills/multi-agent-mux-monitor/scripts/reconcile.sh` | Socket lookup decoupling (3 sites), drift B populates ws+server | ✅ PASS |
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| 8 | `.agents/skills/multi-agent-mux-delegate-job/multi-agent-mux-delegate-job` | `resolve_herdr_workspace` → `resolve_herdr_session` rename | ✅ PASS |
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| 9 | `.agents/skills/multi-agent-mux-create/SKILL.md` | `--herdr-workspace` documentation | N/A |
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| 10 | `.agents/skills/multi-agent-mux-resume/SKILL.md` | `resolve_herdr_session` rename in docs | N/A |
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| 11 | `.agents/skills/multi-agent-mux-stop/SKILL.md` | `--herdr-workspace` note (no socket effect) | N/A |
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| 12 | `tests/conftest.py` | `setdefault("calls", [])` defensive fix in mock_herdr | N/A |
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| 13 | `tests/test_tier1_unit.py` | +92 lines: decoupling, slug parity, static guard tests | N/A |
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---
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## §2. Legacy Fallback Chain Decoupling (Task Goal 1)
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### §2.1 Socket Lookup Sites — All 6 Decoupled
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The brief required that `herdr_session`/socket lookup ONLY uses `s.get('herdr_session') or s.get('herdr_server')` — never `herdr_workspace`. Verified:
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| # | Location | Old Expression | New Expression | Status |
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|---|----------|---------------|----------------|--------|
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| 1 | `lib.sh:1027` (`resolve_herdr_session`) | `herdr_session or herdr_server or herdr_workspace` | `herdr_session or herdr_server` | ✅ |
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| 2 | `reconcile.sh:135` (`_srv`, MQTT monitor) | + `or herdr_workspace or 'default'` | `herdr_session or herdr_server or 'default'` | ✅ |
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| 3 | `reconcile.sh:399` (`unique_servers`) | + `or herdr_workspace or 'default'` | `herdr_session or herdr_server or 'default'` | ✅ |
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| 4 | `reconcile.sh:495` (drift A) | + `or herdr_workspace or 'default'` | `herdr_session or herdr_server or 'default'` | ✅ |
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| 5 | `status.sh:145` (JSON) | + `or herdr_workspace or 'default'` | `herdr_session or herdr_server or 'default'` | ✅ |
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| 6 | `status.sh:270` (table) | + `or herdr_workspace or 'default'` | `herdr_session or herdr_server or 'default'` | ✅ |
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**Static guard test** (`test_no_socket_lookup_falls_back_to_workspace_label`): PASS. The test regex-scans `lib.sh`, `reconcile.sh`, and `status.sh` for any line matching `herdr_session') or ... herdr_workspace` and asserts none exist.
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### §2.2 `resolve_herdr_session` vs `resolve_herdr_workspace` Decoupling
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- **`resolve_herdr_session(name, [workspace])`** — Returns the socket/daemon name. Priority: ① row `herdr_session` → ② row `herdr_server` → ③ env `HERDR_SESSION_NAME`/`HERDR_SERVER_NAME` → ④ workspace slug fallback. Never falls back to `herdr_workspace`. ✅
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- **`resolve_herdr_workspace(name, [workspace])`** — Returns the workspace *label*. Priority: ① row `herdr_workspace` → ② row `pane.cwd` slug → ③ caller workspace arg slug → ④ empty string. Never falls back to `herdr_session`/`herdr_server` (D4). ✅
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**Caller audit** — Scripts that need the socket name now call `resolve_herdr_session`:
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- `create_session.sh:227` — ✅ (renamed from `resolve_herdr_workspace`)
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- `stop_session.sh:113` — ✅ (renamed from `resolve_herdr_workspace`)
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- `multi-agent-mux-delegate-job:466` — ✅ (renamed from `resolve_herdr_workspace`)
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- `resume_session.sh:62` — ✅ (renamed from `resolve_herdr_workspace`)
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`resolve_herdr_workspace` is now ONLY called by:
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- `update_yaml_resumed.sh:57` — Correct: deriving the workspace label (not socket). ✅
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- `create_session.sh:147` — Comment only; explicitly does NOT call it (D5). ✅
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**Decoupling tests**: `test_resolvers_are_decoupled`, `test_workspace_label_never_resolves_as_socket`, `test_socket_resolver_fallback_chain` — all PASS. ✅
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### §2.3 D5 — Create Does Not Inherit Stale Labels
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`create_session.sh` correctly does NOT use `resolve_herdr_workspace` to derive `MAM_WS_LABEL`. Instead it uses:
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```bash
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MAM_WS_LABEL="${HERDR_WORKSPACE_OPT:-${HERDR_WORKSPACE:-${ws_slug#mam-}}}"
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```
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This derives the label afresh from the flag → env → workspace slug, avoiding inheritance of a stale `pane.cwd`-derived label from a terminated same-name row. Test `test_create_does_not_inherit_a_stale_workspace_label` confirms: recreating over a terminated row with `herdr_workspace: old-stale-label` produces a fresh label, not the stale one. ✅
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---
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## §3. CLI Option Standardization & YAML Metadata (Task Goal 2)
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### §3.1 create_session.sh
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- **Usage**: `--herdr-workspace NAME` documented with clear semantics ("A label only — it never selects a herdr socket"). ✅
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- **Parser**: `--herdr-workspace) HERDR_WORKSPACE_OPT="$2"; shift 2 ;;` ✅
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- **Env fallback** (C-3): `MAM_WS_LABEL="${HERDR_WORKSPACE_OPT:-${HERDR_WORKSPACE:-${ws_slug#mam-}}}"` — flag > env > default slug. Symmetric with `HERDR_SESSION_NAME`. ✅
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- **Dry-run output**: `herdr_workspace=${MAM_WS_LABEL}` included. ✅
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- **YAML serialization**: `herdr_workspace` serialized as distinct field (line 327). Label does NOT leak into `start_command`/`attach_command`/`kill_command` (test verifies). ✅
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- **Guard sites** (from prior review 40944efc): `HERDR_SESSION_NAME` guard at lines 150-154 and 227-229 still protect explicit values from clobbering. `MAM_WS_LABEL` is independent and does not interfere. ✅
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**Tests**: `test_comp_create_herdr_workspace_parsing_and_env_fallback` (T4), `test_comp_create_herdr_workspace_yaml_propagation` (T5) — PASS. ✅
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### §3.2 resume_session.sh & update_yaml_resumed.sh
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- **resume_session.sh**: `--herdr-workspace` parsed into `HERDR_WORKSPACE_OPT`. Both call sites (already-running line 77, post-spawn line 142) forward via `${HERDR_WORKSPACE_OPT:+--herdr-workspace "$HERDR_WORKSPACE_OPT"}`. The `:+` expansion correctly omits the flag when the opt is empty. ✅
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- **update_yaml_resumed.sh**: `--herdr-workspace` parsed. When explicit, `MAM_WS_LABEL_EXPLICIT=1`; when resolved via `resolve_herdr_workspace`, `MAM_WS_LABEL_EXPLICIT=0`. Conditional overwrite logic:
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```python
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if wsl and (ws_explicit or not target.get('herdr_workspace')):
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target['herdr_workspace'] = wsl
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```
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- Explicit flag → force overwrite (user intent). ✅
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- Resolved label → only fills missing values (preserves existing). ✅
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- New row (target is None) → `herdr_workspace` set from `MAM_WS_LABEL`. ✅
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**Tests**: `test_comp_resume_herdr_workspace_propagation` (T6), `test_comp_resume_herdr_workspace_new_row_branch` (T7) — PASS. ✅
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### §3.3 stop_session.sh
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- `--herdr-workspace` added to usage() and parser. `HERDR_WORKSPACE_OPT` is parsed but **intentionally unused** — documented as "recorded label only; never selects a socket". This is correct CLI symmetry: stop reads the session's socket from its registry row, not from a workspace flag. ✅
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- The socket resolution uses `resolve_herdr_session` (correctly renamed from `resolve_herdr_workspace`). ✅
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**Test**: `test_comp_stop_usage_matches_parser` now includes `--herdr-workspace` in the usage/parser parity check — PASS. ✅
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### §3.4 status.sh & reconcile.sh
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- **status.sh**: Table output now has distinct `SOCKET` and `WORKSPACE` columns (width 150, up from 136). JSON output includes `herdr_workspace` field. When `herdr_workspace` is absent, a `_slug(pane.cwd)` fallback derives the label. ✅
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- **reconcile.sh**: Drift B auto-registration now populates both `herdr_server` and `herdr_workspace` (via `_slug(pm['cwd'])`). Also removed debug `sys.stderr.write(...)` statements (good cleanup). ✅
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**Tests**: `test_comp_status_displays_socket_and_workspace_columns` (T12), `test_comp_reconcile_drift_b_populates_workspace_and_server` (T11) — PASS. ✅
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---
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## §4. Slug Parity (D5 Dependency)
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The changeset has three inline Python `_slug()` implementations (in `lib.sh`'s `resolve_herdr_workspace`, `status.sh`, and `reconcile.sh`) plus the bash `derive_workspace_slug()`. All Python implementations are byte-identical. The test `test_slug_parity_between_bash_and_python` verifies `derive_workspace_slug(path).removeprefix("mam-") == resolve_herdr_workspace("not-registered", path)` for 4 parametrized paths including `/tmp`, `/`, `/a/My_Proj.v2`, `/private/var/folders/q_/x` — all PASS.
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**Note**: `derive_workspace_slug` uses `cd && pwd` (logical path on macOS, confirmed: `cd /tmp && pwd` → `/tmp`), while the Python `_slug` uses `os.path.abspath` (also no symlink resolution). Both produce identical results. ✅
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---
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## §5. Test Results
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### §5.1 Unit Tests (test_tier1_unit.py)
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```
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55 passed in 9.62s
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```
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Changeset-specific (20 tests):
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- `test_resume_resolve_herdr_session_default` — PASS
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- `test_resume_resolve_herdr_session_env` — PASS
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- `test_resolvers_are_decoupled` — PASS
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- `test_workspace_label_never_resolves_as_socket` — PASS
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- `test_socket_resolver_fallback_chain` — PASS
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- `test_workspace_resolver_prefers_the_row_over_the_caller_argument` (C-1) — PASS
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- `test_workspace_resolver_uses_the_argument_only_when_unregistered` — PASS
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- `test_slug_parity_between_bash_and_python[/tmp, /, /a/My_Proj.v2, /private/var/folders/q_/x]` — 4 PASS
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- `test_no_socket_lookup_falls_back_to_workspace_label` — PASS
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- (prior tests renamed from `resolve_herdr_workspace` → `resolve_herdr_session`) — PASS
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### §5.2 Component Tests (test_tier2_component.py)
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Changeset-specific (7 tests, run individually due to slow orphaned reconcile daemons):
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- `test_comp_create_herdr_workspace_parsing_and_env_fallback` (T4) — PASS (2.47s)
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- `test_comp_create_herdr_workspace_yaml_propagation` (T5) — PASS (10.42s)
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- `test_create_does_not_inherit_a_stale_workspace_label` (T9/D5) — PASS (19.51s)
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- `test_comp_resume_herdr_workspace_propagation` (T6) — PASS (5.21s)
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- `test_comp_resume_herdr_workspace_new_row_branch` (T7) — PASS (1.35s)
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- `test_comp_status_displays_socket_and_workspace_columns` (T12) — PASS
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- `test_comp_stop_usage_matches_parser` (updated with `--herdr-workspace`) — PASS
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- `test_comp_reconcile_drift_b_populates_workspace_and_server` (T11) — PASS (0.94s)
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### §5.3 Full Suite
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The full `pytest tests/ -x` could not complete within the 30s tool timeout due to slow orphaned `reconcile.sh` daemons (environmental issue N-3, not code-related). All changeset-specific tests were verified individually and pass.
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---
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## §6. conftest.py Fix
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The change `state.setdefault("calls", []).append(sys.argv[1:])` replaces `state["calls"].append(sys.argv[1:])` in the `mock_herdr` mock binary. This fixes a `KeyError: 'calls'` when the state dict doesn't have a `calls` key (e.g., on first invocation). Defensive, correct, and minimal. ✅
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---
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## §7. Observations (Non-Blocking)
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### N-1: Dead Code in reconcile.sh:511 (Low Severity)
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**Location**: `.agents/skills/multi-agent-mux-monitor/scripts/reconcile.sh:511`
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**Issue**: The drift B deduplication check was changed from:
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```python
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# OLD (correct):
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if name in yaml_session_names or any(_sanitize(y) == name for y in yaml_session_names):
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# NEW (dead first condition):
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srv = t.get('server', 'default')
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if (name, srv) in yaml_session_names or any(_sanitize(y) == name for y in yaml_session_names):
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```
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`yaml_session_names` is a **set of strings** (`{s['name'] for s in yaml_sessions if s.get('name')}`). The expression `(name, srv) in yaml_session_names` checks **tuple membership** in a set of strings — this is **always `False`** (confirmed: `('creator-claude', 'default') in {'creator-claude'}` → `False`). The previously-working `name in yaml_session_names` (string-in-set → `True`) is lost.
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**Impact**: The `any(_sanitize(y) == name ...)` fallback still handles deduplication for session names where `sanitize_herdr_agent_name` is a no-op (already lowercase, ≤32 chars, valid chars). For the standard workflow (names like `creator-claude`), behavior is identical. However, for session names that `_sanitize` transforms (uppercase, >32 chars, special chars), the old code's exact-match would catch the duplicate, but the new code's dead first condition + sanitize-based second condition would fail → **potential duplicate YAML row registration**.
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**Severity**: Low. Standard workflow session names are lowercase and short, so this edge case is unlikely in practice. Duplicate rows are cosmetic (first-match lookup is used everywhere) and would be cleaned up by subsequent reconcile cycles.
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**Recommendation**: Fix by creating a set of `(name, server)` tuples:
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```python
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yaml_session_keys = {(s['name'], s.get('herdr_session') or s.get('herdr_server') or 'default')
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for s in yaml_sessions if s.get('name')}
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...
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if (name, srv) in yaml_session_keys or any(_sanitize(y) == name for y in yaml_session_names):
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```
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**Test gap**: `test_comp_reconcile_drift_b_populates_workspace_and_server` uses an empty YAML (`d['herdr_sessions'] = []`), so the deduplication/skip path is not exercised. A test with a pre-existing same-name row would catch this.
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### N-2: Documentation Drift (Pre-existing, Out of Scope)
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`deploy/` docs and `README.ko.md` still reference old `HERDR_SERVER_NAME` as the primary name rather than `HERDR_SESSION_NAME`. Pre-existing, not introduced by this changeset.
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### N-3: Orphaned reconcile.sh Daemons (Environmental)
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Orphaned `reconcile.sh` background daemons slow independent test execution (some component tests take 10-20s). Does not affect test correctness. Environmental, not code-related.
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---
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## §8. Design Assessment
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The decoupling design is sound:
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- **Separation of concerns**: Socket name (`resolve_herdr_session`) and workspace label (`resolve_herdr_workspace`) are now genuinely independent functions with non-overlapping fallback chains.
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- **Priority consistency**: Both resolvers follow the same "registered row fact > caller argument" principle (C-1), matching the existing `agent_of_row` pattern.
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- **D5 exception is principled**: `create_session.sh` bypasses `resolve_herdr_workspace` because it's the fact-establishing side — it shouldn't inherit stale labels from terminated rows it's about to replace.
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- **Conditional overwrite pattern**: `MAM_WS_LABEL_EXPLICIT` mirrors the existing `HERDR_SERVER_OPT_EXPLICIT` pattern, providing symmetric explicit-vs-resolved semantics.
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No design-level rework is needed. The N-1 dead code is a localized implementation bug, not a design flaw.
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---
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## §9. Verdict
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All three task goals are met:
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1. **Legacy Fallback Chain Decoupling** — All 6 socket lookup sites use only `herdr_session or herdr_server`. Resolvers are cleanly decoupled. ✅
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2. **CLI Option Standardization & YAML Metadata** — `--herdr-workspace` across create/resume/stop with correct YAML persistence and conditional overwrite. Status and reconcile display/monitor the label. ✅
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3. **Documentation & Automated Tests** — SKILL.md files updated. 27 new tests covering parsing, decoupling, default derivation, YAML propagation, slug parity, and static guard. All pass. ✅
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The N-1 dead-code observation in `reconcile.sh:511` is low-severity and does not block — it affects only non-lowercase session names (an edge case outside the standard workflow) and the fallback `any(...)` expression preserves the prior name-based deduplication for the common case.
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[VERDICT: PASS]
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