fix(issue-10,11,13,15): complete agy purge, orchestrator purge, workspace-anchored registry

Issue #10 - agy purge_artifacts left resumable pieces behind: it now also
removes the SQLite sidecars (-wal/-shm/-journal), the title annotation and
the presence lock (the lock only once no live process references the
conversation), and residual_artifacts() reports anything under
~/.gemini/antigravity-cli still carrying the uuid.

Issue #13 - the orchestrator has no herdr_sessions row, so its conversation
could not be purged by any skill. `lib_py.agents purge <agent|auto> <uuid>`
resolves the adapter from what is on disk (orchestrator_uuids stores bare
uuids), refuses while a live process names the uuid (conversation_in_use:
process list minus the caller's own lineage, plus lsof), and prints what it
purged. `orc_onboard.sh --remove <uuid> --purge-conversation --yes [--agent]`
runs it before the registry update so a refusal changes nothing (exit 4
without --yes, 5 while in use).

Issue #11 - "Successfully removeed": conjugate add/remove explicitly.

Issue #15 - the job registry and audit log followed the caller's cwd, so the
pytest suite (create_session.sh with its default onboarding job, run from the
repo root) had left 593 test records in the real .mam/jobs. Defaults now
resolve MAM_JOBS_DIR / DELEGATE_JOB_LOGS_DIR, then $WORKSPACE_ROOT/.mam/...,
then the cwd (mqtt_common.default_registry_dir / get_logs_dir; registry.py,
publish_event.py, service.py, create_session.sh, stop_session.sh); the
sandbox fixture pins both. The tier suites that used to leak now leave the
real registry untouched (881 records before and after).

Tests: test_issue10_13_purge.py (13), test_issue15_registry_isolation.py (7);
T-O13 pins the corrected message; the R1 helper test and B-9 logs-dir test
now assert the workspace-anchored contract; publish_event snapshot updated.

Refs #10 #11 #13 #15

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

.agents/skills/lib.sh

@@ -2036,8 +2036,9 @@ _start_watchdog_legacy() {
 # NOT `python -m`: for -m, sys.path[0] is the current directory, which therefore
 # beats PYTHONPATH. A frozen loop whose cwd happened to contain a lib_py package
 # would silently execute live code, losing B-13. An explicit insert of SKILL_DIR
-# cannot be shadowed that way. cwd is deliberately left alone, because the
-# registry and audit-log paths are relative to it.
+# cannot be shadowed that way. cwd is deliberately left alone; the registry and
+# audit-log paths resolve to MAM_JOBS_DIR / DELEGATE_JOB_LOGS_DIR, then to
+# $WORKSPACE_ROOT/.mam/..., and only then relative to it (Issue #15).
 _delegation_py() {
   PYTHONPATH="$SKILL_DIR:${PYTHONPATH:-}" "$(_delegate_py_bin)" -c '
 import sys

.agents/skills/lib_py/agents/__main__.py

@@ -1,11 +1,48 @@
 # __main__.py — CLI bridge for lib_py.agents facts and resolution (N4)
 
-import sys, json, shlex
+import os, sys, json, shlex
 from lib_py.agents.registry import get_adapter, own_key, agent_of_row
 
+# `purge auto` probes adapters in this order; opencode last because its
+# artifact path is one shared DB that exists for every uuid.
+PURGE_PROBE_ORDER = ('agy', 'claude', 'hermes', 'grok', 'codex', 'opencode')
+
+
+def _resolve_purge_target(agent_hint: str, uuid: str, workspace: str):
+    """(agent, adapter, ctx) whose on-disk artifact carries `uuid`, else None.
+
+    An explicit agent is trusted as long as its artifact exists. `auto` tries
+    each adapter's own verification first (revalidate mode: an orchestrator
+    conversation is not in any workspace cache), then a plain path check for
+    adapters whose artifact path embeds the uuid.
+    """
+    from lib_py.agents.base import DiscoveryContext
+    names = [agent_hint] if agent_hint and agent_hint != 'auto' else list(PURGE_PROBE_ORDER)
+    probes = []
+    for name in names:
+        adapter = get_adapter(name)
+        if not adapter:
+            continue
+        probes.append((name, adapter, DiscoveryContext(workspace, name, mode="revalidate")))
+    for name, adapter, ctx in probes:
+        try:
+            if adapter.verify_artifact(uuid, ctx):
+                return name, adapter, ctx
+        except Exception:
+            pass
+    for name, adapter, ctx in probes:
+        try:
+            path = adapter.artifact_path(uuid, ctx)
+        except Exception:
+            continue
+        if uuid in path and os.path.exists(path):
+            return name, adapter, ctx
+    return None
+
+
 def main():
     if len(sys.argv) < 2:
-        print("Usage: python -m lib_py.agents <facts|resolve> [args...]", file=sys.stderr)
+        print("Usage: python -m lib_py.agents <facts|resolve|purge> [args...]", file=sys.stderr)
         sys.exit(1)
 
     cmd = sys.argv[1]
@@ -83,6 +120,31 @@ def main():
         print('/exit')
         sys.exit(0)
 
+    elif cmd == 'purge':
+        # purge <agent|auto> <uuid> [workspace]  (Issue #13)
+        # Deletes a conversation's on-disk artifacts through its adapter and
+        # prints one JSON object: {"agent", "purged", "residual", "in_use"}.
+        # Exit 0 purged; 4 refused, conversation still in use (nothing
+        # removed); 5 no adapter has an artifact for this uuid.
+        agent_hint = sys.argv[2] if len(sys.argv) > 2 else 'auto'
+        uuid = sys.argv[3] if len(sys.argv) > 3 else ''
+        workspace = sys.argv[4] if len(sys.argv) > 4 and sys.argv[4] else os.getcwd()
+        if not uuid:
+            print("ERROR: purge requires <agent|auto> <uuid>", file=sys.stderr)
+            sys.exit(1)
+        target = _resolve_purge_target(agent_hint, uuid, workspace)
+        if not target:
+            print(json.dumps({"agent": None, "purged": [], "residual": [], "in_use": False}))
+            sys.exit(5)
+        name, adapter, ctx = target
+        if adapter.conversation_in_use(uuid, ctx):
+            print(json.dumps({"agent": name, "purged": [], "residual": [], "in_use": True}))
+            sys.exit(4)
+        purged = adapter.purge_artifacts(uuid, ctx)
+        residual = adapter.residual_artifacts(uuid, ctx)
+        print(json.dumps({"agent": name, "purged": purged, "residual": residual, "in_use": False}))
+        sys.exit(0)
+
     else:
         print(f"ERROR: Unknown CLI command {cmd!r}", file=sys.stderr)
         sys.exit(1)

.agents/skills/lib_py/agents/adapters/agy.py

@@ -1,4 +1,4 @@
-import os, json, sqlite3, shutil
+import os, sys, json, sqlite3, shutil
 from typing import Optional, Any
 from lib_py.agents.base import BaseAgentAdapter, DiscoveryContext
 
@@ -71,18 +71,55 @@ class AgyAgentAdapter(BaseAgentAdapter):
             return False
         return True
 
+    def _cli_root(self, ctx: DiscoveryContext) -> str:
+        return f"{ctx.home_dir}/.gemini/antigravity-cli"
+
     def purge_artifacts(self, uuid: str, ctx: DiscoveryContext) -> list:
+        # Issue #10: a purge must leave nothing resumable behind. Besides the
+        # conversation DB and the brain dir, agy keeps SQLite sidecars (-wal /
+        # -shm / -journal, created whenever the DB is opened - the stop path
+        # itself does so while capturing the id, and an unflushed WAL can still
+        # hold conversation content), the title annotation and a presence lock.
         purged = []
         db = self.artifact_path(uuid, ctx)
-        if os.path.exists(db):
-            os.remove(db)
-            purged.append(db)
-        brain = f"{ctx.home_dir}/.gemini/antigravity-cli/brain/{uuid}"
+        for path in [db] + [f"{db}{suffix}" for suffix in ("-wal", "-shm", "-journal")]:
+            if os.path.exists(path):
+                os.remove(path)
+                purged.append(path)
+        root = self._cli_root(ctx)
+        brain = f"{root}/brain/{uuid}"
         if os.path.isdir(brain):
             shutil.rmtree(brain, ignore_errors=True)
             purged.append(brain)
+        annotation = f"{root}/annotations/{uuid}.pbtxt"
+        if os.path.exists(annotation):
+            os.remove(annotation)
+            purged.append(annotation)
+        # The presence lock marks a conversation some process has open; only
+        # remove it once nothing references the conversation any more.
+        lock = f"{root}/presence/{uuid}.lock"
+        if os.path.exists(lock):
+            if self.conversation_in_use(uuid, ctx):
+                print(f"WARN: presence lock kept, conversation {uuid} is still in use: {lock}", file=sys.stderr)
+            else:
+                os.remove(lock)
+                purged.append(lock)
         return purged
 
+    def residual_artifacts(self, uuid: str, ctx: DiscoveryContext) -> list:
+        """Anything under the agy CLI tree still carrying this conversation id."""
+        root = self._cli_root(ctx)
+        if not os.path.isdir(root):
+            return []
+        found = []
+        for dirpath, dirnames, filenames in os.walk(root):
+            for name in dirnames + filenames:
+                if uuid in name:
+                    found.append(os.path.join(dirpath, name))
+            # Do not descend into a matched directory; it is reported as a whole.
+            dirnames[:] = [d for d in dirnames if uuid not in d]
+        return sorted(found)
+
     def spawn_spec(self, binary: str, session_uuid: str = "", use_wrapper: bool = False) -> str:
         return f"{binary} --dangerously-skip-permissions"
 

.agents/skills/lib_py/agents/base.py

@@ -1,10 +1,53 @@
 # base.py — BaseAgentAdapter abstract base class, SpawnSpec, and DiscoveryContext
 
-import os, json, sqlite3
+import os, json, sqlite3, shutil, subprocess
 from typing import Optional, Dict, Any, List
 from lib_py.paths import resolve_home
 from lib_py.verify_session import verify_session_uuid, workspace_key
 
+
+def conversation_in_use(uuid: str, paths=()) -> bool:
+    """A live process still references the conversation (Issues #10, #13).
+
+    Either its id is on a command line other than this process's own lineage
+    (`claude -r <uuid>`, `agy --conversation <uuid>`, ... - the purge command
+    itself names the uuid, so its ancestors are excluded), or one of `paths`
+    is held open (lsof, where available). A purge must not touch a
+    conversation that is in use.
+    """
+    try:
+        out = subprocess.run(["ps", "-axo", "pid=,ppid=,command="],
+                             capture_output=True, text=True, timeout=10).stdout
+    except Exception:
+        out = ""
+    parents: Dict[int, int] = {}
+    holders: List[int] = []
+    for line in out.splitlines():
+        parts = line.split(None, 2)
+        if len(parts) < 2 or not (parts[0].isdigit() and parts[1].isdigit()):
+            continue
+        pid, ppid = int(parts[0]), int(parts[1])
+        parents[pid] = ppid
+        if len(parts) > 2 and uuid in parts[2]:
+            holders.append(pid)
+    if holders:
+        lineage = set()
+        p = os.getpid()
+        while p and p not in lineage:
+            lineage.add(p)
+            p = parents.get(p, 0)
+        if any(h not in lineage for h in holders):
+            return True
+    existing = [p for p in paths if p and os.path.exists(p)]
+    if existing and shutil.which("lsof"):
+        try:
+            r = subprocess.run(["lsof", "-t"] + existing, capture_output=True, text=True, timeout=10)
+            if r.stdout.strip():
+                return True
+        except Exception:
+            pass
+    return False
+
 class SpawnSpec:
     def __init__(self, agent_name: str, session_name: str, command: str, env: Optional[Dict[str, str]] = None):
         self.agent_name = agent_name
@@ -107,6 +150,15 @@ class BaseAgentAdapter:
     def purge_artifacts(self, uuid: str, ctx: DiscoveryContext) -> list:
         raise NotImplementedError
 
+    def residual_artifacts(self, uuid: str, ctx: DiscoveryContext) -> list:
+        """Paths still carrying `uuid` after a purge. Adapters that know their
+        on-disk tree override this; the default has nothing to scan."""
+        return []
+
+    def conversation_in_use(self, uuid: str, ctx: DiscoveryContext) -> bool:
+        """True while a live process still references the conversation."""
+        return conversation_in_use(uuid, [self.artifact_path(uuid, ctx)])
+
     def spawn_spec(self, binary: str, session_uuid: str = "", use_wrapper: bool = False) -> str:
         raise NotImplementedError
 

.agents/skills/lib_py/delegation/mqtt_common.py

@@ -137,6 +137,31 @@ DEFAULT_REGISTRY_DIR = ".mam/jobs"
 DEFAULT_TOPIC_ROOT = "python/mqtt/jobs"
 LOCK_FILENAME = ".lock"
 
+
+def _workspace_mam_dir(leaf: str) -> Optional[str]:
+    """`$WORKSPACE_ROOT/.mam/<leaf>` when lib.sh has told us which workspace we
+    serve; None otherwise."""
+    root = os.environ.get("WORKSPACE_ROOT")
+    if root and root.strip() and os.path.isdir(root):
+        return os.path.join(root, ".mam", leaf)
+    return None
+
+
+def default_registry_dir() -> str:
+    """Registry root, resolved at call time (Issue #15).
+
+    ``MAM_JOBS_DIR`` wins; otherwise the workspace lib.sh exported as
+    ``WORKSPACE_ROOT``; otherwise the historical cwd-relative ``.mam/jobs``.
+    Anchoring on the workspace is what keeps a test sandbox (or any caller
+    whose cwd is not the workspace) from registering jobs into whichever
+    ``.mam/jobs`` happens to sit under the current directory - the pytest
+    suite used to leave hundreds of onboarding records in the real registry.
+    """
+    env = os.environ.get("MAM_JOBS_DIR")
+    if env and env.strip():
+        return env
+    return _workspace_mam_dir("jobs") or DEFAULT_REGISTRY_DIR
+
 # Persistent audit-log layout: .mam/delegate_job_logs/<job_id>/{meta,events,status}.
 # This is a *separate* artifact from the registry: the registry is the live job
 # record (mutated in place), the audit log is an append-only history that
@@ -150,14 +175,16 @@ def get_logs_dir() -> str:
     """Audit-log root, resolved at call time (B-9).
 
     Overridable with ``DELEGATE_JOB_LOGS_DIR``; otherwise
-    ``<cwd>/.mam/delegate_job_logs``. Resolved per call rather than at import
-    so a chdir after import cannot strand the audit trail in the old tree —
-    the same reason ``DEFAULT_REGISTRY_DIR`` stays a relative string.
+    ``$WORKSPACE_ROOT/.mam/delegate_job_logs`` (Issue #15, see
+    ``default_registry_dir``); otherwise ``<cwd>/.mam/delegate_job_logs``.
+    Resolved per call rather than at import so a chdir after import cannot
+    strand the audit trail in the old tree — the same reason
+    ``DEFAULT_REGISTRY_DIR`` stays a relative string.
     """
     env = os.environ.get("DELEGATE_JOB_LOGS_DIR")
     if env and env.strip():
         return env
-    return os.path.join(os.getcwd(), ".mam", "delegate_job_logs")
+    return _workspace_mam_dir("delegate_job_logs") or os.path.join(os.getcwd(), ".mam", "delegate_job_logs")
 
 
 def __getattr__(name: str):          # PEP 562 (3.7+)

.agents/skills/lib_py/delegation/publish_event.py

@@ -35,6 +35,7 @@ from lib_py.delegation.mqtt_common import (
     DEFAULT_REGISTRY_DIR,
     SCHEMA_VERSION,
     broker_config_from_job,
+    default_registry_dir,
     events_topic_for,
     load_job,
     next_seq,
@@ -242,7 +243,7 @@ def main(argv=None) -> int:
     parser.add_argument("--data", default=None, help="optional JSON object string")
     parser.add_argument("--retained", action="store_true",
                         help="force retain=True (auto for completed/error)")
-    parser.add_argument("--registry-dir", default=DEFAULT_REGISTRY_DIR)
+    parser.add_argument("--registry-dir", default=default_registry_dir())
     parser.add_argument("--attempts", type=int, default=3)
     parser.add_argument("--finalize-report", default=None, metavar="PATH",
                         help="atomically finalize this report and declare its "

.agents/skills/lib_py/delegation/registry.py

@@ -28,6 +28,7 @@ from lib_py.delegation.mqtt_common import (
     _atomic_write_record,
     _utcnow,
     broker_config_from_env,
+    default_registry_dir,
     load_job,
     registry_lock,
     topic_prefix_for,
@@ -266,7 +267,7 @@ def get_feedback(job_id: str, registry_dir: str = DEFAULT_REGISTRY_DIR) -> str:
 # --------------------------------------------------------------------------
 def _build_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(description="multi-agent-mux-delegate-job registry CLI")
-    parser.add_argument("--registry-dir", default=DEFAULT_REGISTRY_DIR)
+    parser.add_argument("--registry-dir", default=default_registry_dir())
     sub = parser.add_subparsers(dest="command", required=True)
 
     p_reg = sub.add_parser("register", help="create a pending job; prints the job id")

.agents/skills/lib_py/delegation/service.py

@@ -18,7 +18,7 @@ logger = logging.getLogger("delegate_job.service")
 
 class DelegationService(object):
     def __init__(self, registry_dir=None, persistent=False):
-        self.registry_dir = registry_dir or mqtt_common.DEFAULT_REGISTRY_DIR
+        self.registry_dir = registry_dir or mqtt_common.default_registry_dir()
         self.persistent = persistent
         self._publisher = None
 

.agents/skills/multi-agent-mux-create/scripts/create_session.sh

@@ -350,7 +350,7 @@ if [ -n "$SUBMIT_JOB_PROMPT" ]; then
     local_info=$(python3 -c "
 import sys, json, os
 jid = '$DELEGATE_JOB_ID'
-reg_dir = os.environ.get('MAM_JOBS_DIR', '.mam/jobs')
+reg_dir = os.environ.get('MAM_JOBS_DIR') or (os.path.join(os.environ['WORKSPACE_ROOT'], '.mam', 'jobs') if os.environ.get('WORKSPACE_ROOT') else '.mam/jobs')
 p = os.path.join(reg_dir, f'{jid}.json')
 if os.path.exists(p):
     try:

.agents/skills/multi-agent-mux-delegate-job/SKILL.md

@@ -109,8 +109,13 @@ Which tree wins, by execution context:
 `SKILL_DIR` at the front of the import path. It deliberately does **not** use
 `python -m`: for `-m` the current directory precedes `PYTHONPATH`, so a frozen
 loop whose working directory happened to contain a `lib_py` package would have
-silently executed live code. The working directory is left untouched, because
-the registry and audit-log paths are relative to it.
+silently executed live code. The working directory is left untouched; the
+registry and audit-log paths resolve to `MAM_JOBS_DIR` / `DELEGATE_JOB_LOGS_DIR`
+when set, otherwise to `$WORKSPACE_ROOT/.mam/jobs` and
+`$WORKSPACE_ROOT/.mam/delegate_job_logs` (the workspace `lib.sh` exports), and
+only without either to the cwd-relative `.mam/...` (Issue #15 — this is what
+stops a caller whose cwd is not the workspace, such as the pytest suite, from
+registering jobs into a foreign registry).
 
 Setting `MAM_DELEGATION_PY=0` switches the shell helpers back to their preserved
 legacy bodies with no redeploy.

.agents/skills/multi-agent-mux-orc-onboard/SKILL.md

@@ -26,10 +26,27 @@ Registers an orchestrator session UUID into the `orchestrator_uuids` list of `.m
 ### Options
 - `--uuid <uuid>`: Explicitly register the specified orchestrator session UUID.
 - `--remove <uuid>`: Remove the specified UUID from the `orchestrator_uuids` list.
+- `--purge-conversation`: With `--remove`, also delete the conversation's on-disk artifacts through its agent adapter (Issue #13). Irreversible — requires `--yes`; refused (exit `5`, registration untouched) while a live process still references the conversation, e.g. when run from inside that very session.
+- `--yes`: Skip the `--purge-conversation` confirmation (without it the script prints the danger notice and exits `4`).
+- `--agent <name>`: Adapter to purge with (`claude|agy|hermes|grok|opencode|codex`). Default `auto`: each adapter is asked whether it owns an artifact for the UUID (`agy` → `~/.gemini/antigravity-cli/conversations/<uuid>.db` etc.). Needed because `orchestrator_uuids` stores bare UUIDs, not the agent kind.
 - `--list`: Display all currently registered orchestrator UUIDs.
 - `--no-autodetect`: Disable process ancestry auto-detection when `--uuid` is not provided.
 - `--dry-run`: Output proposed changes without mutating the state registry.
 
+### Purging the orchestrator conversation
+
+`multi-agent-mux-stop --purge-conversation` only reaches sessions that have a `herdr_sessions` row; the orchestrator never has one. To wipe an orchestrator conversation for good:
+
+```bash
+.agents/skills/multi-agent-mux-orc-onboard/scripts/orc_onboard.sh --remove <uuid> --purge-conversation --yes
+# purged: ~/.gemini/antigravity-cli/conversations/<uuid>.db
+# purged: ~/.gemini/antigravity-cli/brain/<uuid>
+# ...
+# residual: none (agent: agy)
+```
+
+The purge runs before the registry update, so a refused purge (conversation in use, exit `5`) changes nothing. If no adapter finds an artifact for the UUID the registration is still removed with a warning. For agy the adapter also removes the SQLite sidecars (`-wal`/`-shm`/`-journal`), the title annotation and the presence lock (Issue #10) and reports anything under `~/.gemini/antigravity-cli` that still carries the UUID as `WARN residual:`.
+
 ## Auto-Detection Hierarchy (Rev.2)
 
 When `--uuid` is omitted, `orc_onboard.sh` inspects the process ancestry tree of the nearest agent ancestor (`claude`, `agy`, `hermes`, `grok`, `opencode`, `codex`) in the following order:
@@ -51,5 +68,7 @@ When `--uuid` is omitted, `orc_onboard.sh` inspects the process ancestry tree of
 ## Exit Statuses
 - `0`: Success (registered, removed, listed, or already present).
 - `1`: Conflict — the ID is currently owned by a `running` sub-agent session row.
-- `2`: Invalid arguments or malformed ID format.
+- `2`: Invalid arguments or malformed ID format (including `--purge-conversation` without `--remove`).
 - `3`: Detection failed — ID could not be determined.
+- `4`: `--purge-conversation` needs `--yes` — nothing changed.
+- `5`: Purge refused — the conversation is still in use by a live process; nothing changed.

.agents/skills/multi-agent-mux-orc-onboard/scripts/orc_onboard.sh

@@ -13,17 +13,26 @@ MODE="add"
 TARGET_UUID=""
 AUTODETECT=true
 DRY_RUN=false
+PURGE=false
+YES=false
+AGENT_HINT="auto"
 
 usage() {
   cat <<'EOF'
 Usage: orc_onboard.sh [OPTIONS]
 
 Options:
-  --uuid <uuid>      Register specified orchestrator session UUID
-  --remove <uuid>    Remove specified UUID from orchestrator_uuids list
-  --list             List all registered orchestrator UUIDs
-  --no-autodetect    Disable process ancestry auto-detection when --uuid is omitted
-  --dry-run          Preview changes without updating state registry
+  --uuid <uuid>          Register specified orchestrator session UUID
+  --remove <uuid>        Remove specified UUID from orchestrator_uuids list
+  --purge-conversation   With --remove: also delete the conversation's on-disk
+                         artifacts through its agent adapter (irreversible;
+                         refused while a live process still references it)
+  --yes                  Skip the --purge-conversation confirmation
+  --agent <name>         Adapter for --purge-conversation (claude|agy|hermes|
+                         grok|opencode|codex); default: auto-detect from disk
+  --list                 List all registered orchestrator UUIDs
+  --no-autodetect        Disable process ancestry auto-detection when --uuid is omitted
+  --dry-run              Preview changes without updating state registry
 EOF
   exit 2
 }
@@ -46,6 +55,19 @@ while [ $# -gt 0 ]; do
       MODE="list"
       shift
       ;;
+    --purge-conversation)
+      PURGE=true
+      shift
+      ;;
+    --yes)
+      YES=true
+      shift
+      ;;
+    --agent)
+      if [ $# -lt 2 ] || [ -z "$2" ]; then usage; fi
+      AGENT_HINT="$2"
+      shift 2
+      ;;
     --no-autodetect)
       AUTODETECT=false
       shift
@@ -197,6 +219,11 @@ if ! is_valid_id "$TARGET_UUID"; then
   exit 2
 fi
 
+if [ "$PURGE" = true ] && [ "$MODE" != "remove" ]; then
+  echo "ERROR: --purge-conversation only applies together with --remove <uuid>." >&2
+  exit 2
+fi
+
 if [ "$MODE" = "add" ]; then
   # Check if running sub-agent session row currently owns this UUID
   check_owner_rc=0
@@ -222,10 +249,45 @@ sys.exit(0)
 fi
 
 if [ "$DRY_RUN" = true ]; then
-  echo "[dry-run] would $MODE orchestrator uuid: $TARGET_UUID"
+  if [ "$PURGE" = true ]; then
+    echo "[dry-run] would remove orchestrator uuid: $TARGET_UUID and purge its conversation artifacts (agent: $AGENT_HINT)"
+  else
+    echo "[dry-run] would $MODE orchestrator uuid: $TARGET_UUID"
+  fi
   exit 0
 fi
 
+# Issue #13: the orchestrator has no herdr_sessions row, so stop_session.sh
+# --purge-conversation can never reach its conversation. Purge FIRST, through
+# the adapter (`lib_py.agents purge`): a refusal because the conversation is
+# still in use leaves the registration untouched.
+PURGE_JSON=""
+if [ "$PURGE" = true ]; then
+  if [ "$YES" != true ]; then
+    echo "DANGER: --purge-conversation will DELETE orchestrator conversation $TARGET_UUID from disk." >&2
+    echo "  This cannot be undone: no future resume of that conversation." >&2
+    echo "  Re-run with --yes to confirm." >&2
+    exit 4
+  fi
+  purge_rc=0
+  PURGE_JSON="$("$(_delegate_py_bin)" -m lib_py.agents purge "$AGENT_HINT" "$TARGET_UUID" "$WORKSPACE_ROOT")" || purge_rc=$?
+  case "$purge_rc" in
+    0) ;;
+    4)
+      echo "ERROR: conversation $TARGET_UUID is still in use (a live process references it); nothing purged, registration unchanged." >&2
+      exit 5
+      ;;
+    5)
+      echo "WARN: no on-disk conversation found for $TARGET_UUID (agent: $AGENT_HINT); nothing to purge." >&2
+      PURGE_JSON=""
+      ;;
+    *)
+      echo "ERROR: purge failed (rc=$purge_rc): $PURGE_JSON" >&2
+      exit 1
+      ;;
+  esac
+fi
+
 MAM_TARGET_UUID="$TARGET_UUID" MAM_OP_MODE="$MODE" atomic_dump_yaml "$AGENT_SESSIONS_YAML" <<'PYEOF'
 import os, sys, json
 
@@ -243,4 +305,23 @@ elif op == "remove":
 d["orchestrator_uuids"] = uuids
 PYEOF
 
-echo "Successfully ${MODE}ed orchestrator UUID: $TARGET_UUID"
+case "$MODE" in
+  add) verb="added" ;;
+  remove) verb="removed" ;;
+  *) verb="${MODE}ed" ;;
+esac
+echo "Successfully $verb orchestrator UUID: $TARGET_UUID"
+
+if [ -n "$PURGE_JSON" ]; then
+  printf '%s' "$PURGE_JSON" | python3 -c '
+import json, sys
+d = json.loads(sys.stdin.read() or "{}")
+for p in d.get("purged", []):
+    print("purged: %s" % p)
+residual = d.get("residual", [])
+for p in residual:
+    print("WARN residual: %s" % p)
+if not residual:
+    print("residual: none (agent: %s)" % d.get("agent"))
+'
+fi

.agents/skills/multi-agent-mux-stop/SKILL.md

@@ -105,7 +105,7 @@ The script:
 2. If `delegate_job_id` is set, automatically publishes a `progress --detail "terminating"` event to the multi-agent-mux-delegate-job registry
 3. Captures the `last_visible_status` from `herdr capture-pane` (so we have a final TUI snapshot for audit)
 4. Attempts graceful exit keys → SIGTERM kill-session → SIGKILL fallback
-5. For `purge-conversation`: deletes `~/.claude/projects/.../jsonl` (claude) or `~/.gemini/antigravity-cli/conversations/...db` + `brain/...` (agy)
+5. For `purge-conversation`: deletes `~/.claude/projects/.../jsonl` (claude) or, for agy, `~/.gemini/antigravity-cli/conversations/<uuid>.db` with its `-wal`/`-shm`/`-journal` sidecars, `brain/<uuid>/`, `annotations/<uuid>.pbtxt` and `presence/<uuid>.lock` (the lock only once no live process references the conversation — Issue #10)
 6. Updates the YAML entry and SQLite database atomically
 7. If `delegate_job_id` is set, publishes a `completed` event to the multi-agent-mux-delegate-job registry
 

.agents/skills/multi-agent-mux-stop/scripts/stop_session.sh

@@ -148,7 +148,7 @@ if [ -n "$DELEGATE_JOB_ID" ]; then
   local_info=$(python3 -c "
 import sys, json, os
 jid = '$DELEGATE_JOB_ID'
-reg_dir = os.environ.get('MAM_JOBS_DIR', '.mam/jobs')
+reg_dir = os.environ.get('MAM_JOBS_DIR') or (os.path.join(os.environ['WORKSPACE_ROOT'], '.mam', 'jobs') if os.environ.get('WORKSPACE_ROOT') else '.mam/jobs')
 p = os.path.join(reg_dir, f'{jid}.json')
 if os.path.exists(p):
     try: