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

name, description, version, author, license, platforms, environments, metadata

name	description	version	author	license	platforms	environments	metadata
multi-agent-mux-resume	Resume an existing agent (claude, antigravity/agy) conversation by UUID into a herdr session. Reads .mam/agent-sessions.yaml for the saved session/conversation id, spawns (or reuses) a herdr session of the matching name, and runs `claude -r <id>` or `agy --conversation <id>` inside. Use when you want to reattach to a previous session's context, or revive a session whose herdr died but the agent's conversation is still on disk.	1.0.0	godopu	MIT	linux macos	terminal herdr	hermes tags related_skills prereq_skills agent herdr claude antigravity agy multi-agent context resume session-id multi-agent-mux-create multi-agent-mux-stop multi-agent-mux-monitor claude-code multi-agent-mux-create

Multi-Agent Resume — Reattach to a Saved Conversation

Companion skills: multi-agent-mux-create (start a fresh agent), multi-agent-mux-stop (terminate), multi-agent-mux-monitor (live status). Herdr Isolation: HERDR_SERVER_NAME env var를 create에서 설정한 경우, 동일 서버에서 동작합니다. 자세한 격리 패턴은 multi-agent-mux-create/SKILL.md 참조. Single source of truth: ./.mam/agent-sessions.yaml.

What this skill does

Container + data reconstruction: spawn a herdr session (the container), then run the agent inside with a specific session id (the data) so the previous conversation's context is restored.

Three cases this skill handles:

1. herdr is dead, conversation lives — agent-sessions.yaml has the UUID. The JSONL/db is on disk. Re-spawn the herdr session + run claude -r <id> / agy --conversation <id>.
2. herdr is alive but empty — You started a session with multi-agent-mux-create but haven't sent a message yet (so no session id was assigned). The user can either send their first message (and the id is auto-assigned), or you can read the workspace's most recent conversation from $HOME_DIR/.gemini/antigravity-cli/cache/last_conversations.json (defaults to ~/.gemini/...) for agy, or the latest *.jsonl in $CLAUDE_PROJECT_DIR/<workspace-key>/ (defaults to ~/.claude/projects/) for claude.
3. herdr is alive AND the agent inside is already running — Just attach. No re-spawn needed.

Resuming a stopped session (stopped → running)

When a session was ended via multi-agent-mux-stop (which captures the ID and gracefully stops by default), its row is status: stopped with resumable: true and the conversation id already recorded in claude_session_id_own / agy_conversation_id_own. This is the ideal resume path:

• tier-1, race-free: because the stop command wrote the id into the row at stop time, resolve_session_id.sh resolves it via find_workspace_uuid tier-1 (the per-row own id) — no reliance on the mtime-based disk scan, so a concurrent session in another workspace can never shadow it.
• On resume, update_yaml_resumed.sh transitions stopped → running and clears the stop metadata (stopped_at, stopped_at_epoch, stop_reason, resumable) along with the usual terminated_at* / termination_mode / archived_at, so the row reflects a clean running state with no stale end-of-session fields.

UUID resolution order

agent-sessions.yaml is the primary source. The skill reads in this order:

1. agent-sessions.yaml → agent_identities.<agent>.session_id (claude) / conversation_id (agy) — explicit saved value
2. agent-sessions.yaml → agent_identities.<agent>.session_jsonl (claude) / conversation_db (agy) — the on-disk artifact
3. Fallback: scan disk for the workspace's most recent conversation (Note: CLAUDE_PROJECT_DIR overrides the default ~/.claude/projects/ path, and HOME_DIR overrides the ~ path) —
   • claude: ls -t $CLAUDE_PROJECT_DIR/<workspace-key>/*.jsonl | head -1 and parse the sessionId from the first line
   • agy: jq -r '."<workspace>"' $HOME_DIR/.gemini/antigravity-cli/cache/last_conversations.json

If all three are empty → the workspace has no conversation yet. Fall back to multi-agent-mux-create.

Workflow

WORKSPACE=/path/to/project
AGENT=claude  # or agy or hermes
SESSION_NAME=<workspace>-creator-<agent>  # same convention as multi-agent-mux-create

# Resolve the isolated herdr server name & load isolation utils
source .agents/skills/lib.sh

# 1. Resolve the session id (T5: pass session name for target-row isolation check)
UUID=$(bash .agents/skills/multi-agent-mux-resume/scripts/resolve_session_id.sh \
  --workspace "$WORKSPACE" --agent "$AGENT" --session "$SESSION_NAME")

if [ -z "$UUID" ]; then
  echo "No saved session for $WORKSPACE ($AGENT). Use multi-agent-mux-create first."
  exit 1
fi

export HERDR_SERVER_NAME="$(resolve_herdr_server "$SESSION_NAME")"

# 2. If herdr is alive, attach. Done.
if herdr has-session -t "$SESSION_NAME" 2>/dev/null; then
  echo "herdr '$SESSION_NAME' already running. Attaching..."
  exec herdr agent attach "$SESSION_NAME"
fi

# 3. Resolve isolation settings for this session (T4/T5 re-apply)
# _get_session_isolation resolves isolation block for the session row
ISO_ROOT=""
ISO_ENV=""
ISO_ARGS=""
ISO_DATA=$(env_python "$AGENT_SESSIONS_YAML" SESSION_NAME="$SESSION_NAME" <<'PYEOF'
import os, json, yaml, sqlite3
name = os.environ['SESSION_NAME']
yaml_path = os.environ['YAML_PATH']
db_path = os.path.splitext(yaml_path)[0] + '.db'
d = {}
try:
    if os.path.exists(db_path):
        conn = sqlite3.connect(db_path, timeout=60.0)
        row = conn.execute('SELECT data FROM sessions WHERE name=?', (name,)).fetchone()
        if row:
            s = json.loads(row[0])
            print(json.dumps(s.get('isolation') or {}))
            raise SystemExit(0)
    elif os.path.exists(yaml_path):
        with open(yaml_path) as f:
            d = yaml.safe_load(f) or {}
except Exception:
    pass
for s in d.get('herdr_sessions', []):
    if s.get('name') == name:
        print(json.dumps(s.get('isolation') or {}))
        raise SystemExit(0)
print("{}")
PYEOF
)
ISO_ROOT=$(printf '%s' "$ISO_DATA" | python3 -c 'import sys,json; print(json.load(sys.stdin).get("root",""))')
if [ -n "$ISO_ROOT" ]; then
  ISO_ENV="$(isolation_env_prefix "$AGENT" "$ISO_ROOT")"
  ISO_ARGS="$(isolation_cmd_args "$AGENT" "$ISO_ROOT")"
  echo "Re-applying isolation: root=$ISO_ROOT env=$ISO_ENV args=$ISO_ARGS"
fi

# Determine CMD_FULL with isolation applied
case "$AGENT" in
  claude) CMD_FULL="claude --dangerously-skip-permissions -r $UUID" ;;
  agy)    CMD_FULL="agy --dangerously-skip-permissions --conversation $UUID" ;;
  hermes) CMD_FULL="hermes --resume $UUID" ;;
  cline)  CMD_FULL="cline -i --id $UUID" ;;
esac

# Prepend env prefix and append command args (T4)
if [ -n "$ISO_ENV" ]; then
  CMD_FULL="$ISO_ENV $CMD_FULL"
fi
if [ -n "$ISO_ARGS" ]; then
  CMD_FULL="$CMD_FULL $ISO_ARGS"
fi

# 4. Spawn new herdr session + run agent with the saved id (and re-applied isolation)
case "$AGENT" in
  claude)
    if [ -z "$ISO_ROOT" ] && [ -x "$HOME/.local/bin/canary-projects-multi-agent-mux-creator-claude" ]; then
      START_CMD="herdr new-session -d -s \"$SESSION_NAME\" -x 140 -y 40 -c \"$WORKSPACE\" \"$HOME/.local/bin/canary-projects-multi-agent-mux-creator-claude\""
    else
      START_CMD="herdr new-session -d -s \"$SESSION_NAME\" -x 140 -y 40 -c \"$WORKSPACE\" \"$CMD_FULL\""
    fi
    eval "$START_CMD"
    # auto-handle trust / bypass dialogs
    handle_startup_dialogs "$SESSION_NAME" 20
    ;;
  agy|hermes|cline)
    eval "herdr new-session -d -s \"$SESSION_NAME\" -x 140 -y 40 -c \"$WORKSPACE\" \"$CMD_FULL\""
    ;;
esac

# 4. Update agent-sessions.yaml: status running, last_visible_status
# (Also automatically publishes a `progress --detail "resumed"` event to the multi-agent-mux-delegate-job registry if a delegate_job_id exists)
bash .agents/skills/multi-agent-mux-resume/scripts/update_yaml_resumed.sh \
  --session "$SESSION_NAME" --uuid "$UUID"

# 5. Attach (real native command — "attach" isn't in the lib.sh tmux-compat shim,
#    and real herdr has no `-t` flag here, only a positional target)
herdr agent attach "$SESSION_NAME"

Pitfalls

• claude -r requires the SAME project directory — if the workspace path differs from when the session was created, claude will create a new project dir key (-home-...-different-name) and put the resume in a different location. Always -c (cd to workspace) before running.
• agy's --conversation flag name varies by version — older versions used --resume or -r. Check agy --help | grep -E "conversation|resume" and use the right flag. v1.0.x: --conversation.
• The first message after resume might re-trigger TUI dialogs — if the original session was created with --dangerously-skip-permissions, those flags are NOT persisted; you must re-apply them on resume. The script above re-passes them.
• Don't resume if the session is brand new and empty — multi-agent-mux-create already set up an empty container; sending a probe message ("init") is the right way to materialize a session id, NOT claude -r with a placeholder.
• agy --conversation <id> will fail if the conversation was deleted from disk — check ~/.gemini/antigravity-cli/conversations/<uuid>.db exists before attempting resume. If missing, the conversation is gone; you need a fresh session via multi-agent-mux-create.

Verification

# 1. herdr alive with the right cmd (real native command, no lib.sh needed)
herdr agent get "$SESSION_NAME" | python3 -c "
import sys, json
a = json.load(sys.stdin)['result']['agent']
print(f\"cmd={a['agent']} cwd={a['cwd']}\")
"

# 2. agent-sessions.yaml updated
python3 -c "
import yaml
d = yaml.safe_load(open('.mam/agent-sessions.yaml'))
s = [s for s in d['herdr_sessions'] if s['name'] == '$SESSION_NAME'][0]
print(f'  status: {s[\"status\"]}')
print(f'  pane.cmd_full: {s[\"pane\"][\"cmd_full\"]}')
"

# 3. TUI shows resumed conversation (real native command, no lib.sh needed)
sleep 5
herdr agent read "$SESSION_NAME" --source visible --lines 30
# look for the previous message at top of the buffer (claude) or last_visible_status set (agy)

herdr list-panes / herdr capture-pane here are tmux-compat pseudo-commands that only work after source .agents/skills/lib.sh (as done in Workflow above) — the real herdr binary doesn't have those subcommands. This block uses the real herdr agent get/herdr agent read equivalents instead so it also works standalone.

When NOT to use this skill

• No saved session yet → multi-agent-mux-create
• Killing an existing session → multi-agent-mux-stop
• Just attaching → herdr agent attach <name> (no skill needed)