agent-ecosystem/docs/team-management/debugging-agent-teams.md

Debugging Agent Teams

Use this runbook when a team launch hangs, a teammate is marked registered or failed_to_start, messages do not appear, or OpenCode participants look online but do not answer.

First Rule

Do not guess from the UI alone. Always correlate:

• UI diagnostics copied from the launch/member detail panel
• persisted team files under ~/.claude/teams/<teamName>/
• live process table
• runtime-specific evidence, especially OpenCode lane manifests

Key Files

Team root:

TEAM="<team-name>"
TEAM_DIR="$HOME/.claude/teams/$TEAM"
TASKS_DIR="$HOME/.claude/tasks/$TEAM"

Important files and folders:

• config.json - configured members, provider/model selection, project path
• members.meta.json - member metadata, removed members, worktree settings if present
• launch-state.json - current app-side truth for member launch/liveness
• bootstrap-state.json - bootstrap phase summary when present
• bootstrap-journal.jsonl - ordered bootstrap events from the CLI/runtime
• inboxes/*.json - durable inbox messages for user, lead, and native teammates
• sentMessages.json - app-side sent-message records
• $TASKS_DIR/*.json - task board state
• .opencode-runtime/lanes.json - OpenCode lane index
• .opencode-runtime/lanes/<encoded-lane-id>/manifest.json - lane-scoped runtime store manifest
• .opencode-runtime/lanes/<encoded-lane-id>/opencode-sessions.json - committed OpenCode session evidence

Quick inspection:

jq '.teamLaunchState, .summary, .members' "$TEAM_DIR/launch-state.json"
jq '.lanes' "$TEAM_DIR/.opencode-runtime/lanes.json" 2>/dev/null
find "$TEAM_DIR/.opencode-runtime" -maxdepth 3 -type f | sort
tail -80 "$TEAM_DIR/bootstrap-journal.jsonl" 2>/dev/null

Launch Phases

Primary launch and OpenCode secondary lanes are different paths.

• Primary CLI members are created by the main provisioning process.
• OpenCode secondary members are launched as side lanes after primary filesystem readiness.
• Missing inboxes/<opencode-member>.json is not automatically a launch bug. OpenCode side lanes do not have to be primary inbox-created before they start.
• The UI can show the team still launching while primary members are already usable, because "all teammates joined" waits for secondary lanes too.

When a launch hangs at Prepared communication channels for X/Y members, check whether Y incorrectly includes secondary OpenCode members. The filesystem monitor should wait for effectiveMembers, not every requested member.

Teammate Runtime Debug Mode

Desktop launches use the app-managed process backend by default. That is the supported default for normal app launches because the app owns the process lifecycle, runtime logs, cleanup, and bootstrap evidence.

For local debugging, force pane-backed teammates through tmux:

CLAUDE_TEAM_TEAMMATE_MODE=tmux pnpm dev

For a single launch from the UI, add this to custom CLI args:

--teammate-mode tmux

Expected behavior:

• tmux mode should remove CLAUDE_TEAM_FORCE_PROCESS_TEAMMATES from the launch env.
• The desktop app should pass --teammate-mode tmux to the runtime CLI.
• The orchestrator should report backend_type: "tmux" and tmux_pane_id like %1.
• If tmux is unavailable, the launch dialog should block explicit tmux mode with a tmux readiness message.

Use this mode to inspect interactive CLI behavior, terminal prompts, and pane output. Do not treat it as equivalent to the process backend for recovery semantics; persisted pane IDs can help discovery, but app restart does not make old panes a fully app-owned runtime again.

Member State Meanings

Common launch-state.json cases:

• confirmed_alive with bootstrapConfirmed: true - member is usable.
• registered / runtime_pending_bootstrap - process or lane exists, but bootstrap proof is not committed yet.
• registered_only - app has persisted metadata, but no live runtime proof.
• runtime_process_candidate - process/session was observed, but committed runtime evidence is incomplete or pending.
• failed_to_start with runtime_process - a process exists, but the launch gate still failed. Inspect diagnostics and runtime evidence.
• failed_to_start with stale_metadata - persisted pid/session is old or dead.

Do not treat member_briefing alone as runtime evidence. For OpenCode, the authoritative proof is committed bootstrap/session evidence in the lane runtime store.

OpenCode Debug Flow

For an OpenCode teammate:

MEMBER="<member-name>"
jq --arg member "$MEMBER" '.members[$member]' "$TEAM_DIR/launch-state.json"
jq '.lanes' "$TEAM_DIR/.opencode-runtime/lanes.json" 2>/dev/null
find "$TEAM_DIR/.opencode-runtime/lanes" -maxdepth 3 -type f | sort

Expected healthy OpenCode lane:

• lanes.json has the lane state active
• lane manifest.json has activeRunId
• lane manifest has at least one runtime evidence entry, usually opencode.sessionStore
• lane directory has opencode-sessions.json
• launch-state.json member has runtimeRunId, runtimeSessionId, and bootstrapConfirmed: true

If the bridge says bootstrap succeeded but the manifest has entries: [], the issue is evidence commit, not model behavior. The member must not be considered deliverable until opencode-sessions.json and its manifest entry exist.

OpenCode bridge ledger, if needed:

LEDGER="$HOME/Library/Application Support/claude-agent-teams-ui/opencode-bridge/command-ledger.json"
jq --arg team "$TEAM" '.data[] | select(.teamName == $team)' "$LEDGER" 2>/dev/null

Live process checks:

pgrep -af "opencode serve"
ps -p <pid> -o pid,ppid,etime,command

Do not kill all OpenCode processes as a debugging shortcut. First identify whether the pid belongs to the current team/lane. Some OpenCode temp libopentui.dylib files are held by live opencode serve processes and should only be cleaned after those processes are stopped.

Messaging Debug Flow

Lead and teammates use different delivery paths:

• Lead reads stdin. Messages to lead go through relayLeadInboxMessages().
• Native teammates read their inbox files directly.
• OpenCode teammates receive prompts through runtime delivery and must reply via agent-teams_message_send.
• Teammate-to-user replies should appear in inboxes/user.json or app sent-message projections.

If a notification appears but the Messages UI does not show it:

jq '.' "$TEAM_DIR/inboxes/user.json" 2>/dev/null
jq '.' "$TEAM_DIR/sentMessages.json" 2>/dev/null

Check from, to, messageId, relayOfMessageId, and taskRefs. Unknown authors should be rejected or normalized at the write boundary, not silently rendered as fake teammates.

For OpenCode "message saved but not delivered" cases, inspect the OpenCode prompt-delivery ledger and response proof. Do not synthesize visible replies in the frontend.

Task And Work-Stall Debug Flow

For task stalls:

TASK="<short-or-full-task-id>"
rg -n "$TASK" "$TASKS_DIR" "$TEAM_DIR/inboxes" "$TEAM_DIR/bootstrap-journal.jsonl" 2>/dev/null

Important distinctions:

• Delivery proof means the agent received the message.
• Task progress proof means the agent made meaningful task progress.
• A weak comment like "starting work" is not strong progress.
• task_add_comment should be evaluated from the actual persisted comment text, not only from the tool call.

Task-stall monitor defaults:

• General task-stall monitor is for all agents.
• OpenCode direct remediation is provider-specific and should nudge the OpenCode owner first.
• If OpenCode remediation is not accepted, fallback to lead alert.
• Watchdog/remediation must not auto-start new OpenCode processes.

Task Log Stream Debug Flow

Task Log Stream is a projection, not a separate source of truth.

For OpenCode tasks, a healthy stream should show native tool rows such as read, bash, edit, write, plus Agent Teams MCP rows. If it only shows agent-teams_* calls:

• confirm the task has OpenCode attribution for the member/session
• confirm the OpenCode transcript contains native tools inside the bounded task window
• check whether the task was assigned after the native work happened
• do not widen attribution so far that unrelated session work is pulled into the task

If Changes says "No file changes recorded" while native write/edit rows exist, inspect the ledger/backfill path. Task logs can show runtime tools even when .board-task-changes/** was not created.

Safe Fix Checklist

Before changing launch or runtime logic:

• Preserve stale-run, tombstone, stopped-team, and removed-member guards.
• Do not make member_briefing runtime evidence.
• Do not make delivery/watchdog auto-launch a fresh OpenCode lane.
• Keep primary launch readiness separate from secondary OpenCode lane readiness.
• Keep runtime evidence lane-scoped. Never let one OpenCode lane satisfy another lane.
• Add a regression test for the exact state shape you found in launch-state.json.

Recommended verification:

pnpm vitest run test/main/services/team/TeamProvisioningService.test.ts
pnpm vitest run test/main/services/team/TeamAgentLaunchMatrix.safe-e2e.test.ts
pnpm typecheck --pretty false
git diff --check

Use narrower test commands first when editing a focused path, then run the broader suite that covers launch, delivery, and liveness.