cmux-diagnostics

Source excerpt starting at line 1.

1---2name: cmux-diagnostics3description: "Run end-user cmux diagnostics. Use when cmux hooks, notifications, session restore, settings, browser automation, socket access, CLI control, or agent resume behavior is not working, or when the user asks for a cmux health check, doctor report, or support-safe debug summary."4---5 6# cmux Diagnostics7 8Collect and interpret support-safe cmux diagnostics for end users. Default to read-only checks. Never dump hook config files, session stores, prompt logs, tokens, or environment secrets.9 10## Quick report11 12Run the bundled read-only script first, from whichever install path exists:13 14```bash15skills/cmux-diagnostics/scripts/cmux-diagnostics            # cmux checkout16~/.agents/skills/cmux-diagnostics/scripts/cmux-diagnostics  # installed skill17~/.codex/skills/cmux-diagnostics/scripts/cmux-diagnostics   # Codex-only skills.sh install18```19 20Add `--include-context` only when workspace names, cwd paths, and current cmux identifiers are relevant to the reported issue.21 22## What to check23 241. **CLI and socket health**: `command -v cmux`, `cmux ping`, `cmux capabilities --json`. If socket commands fail, check whether the agent is running inside a cmux terminal and whether socket automation is enabled.252. **Settings health**: `cmux-settings validate` and `cmux-settings get terminal.autoResumeAgentSessions` (from `~/.agents/skills/cmux-settings/scripts/`, or `~/.codex/skills/...` for a `skills.sh` install). When `terminal.autoResumeAgentSessions` is false, cmux restores panes but does not resume saved agent sessions.263. **Hook installation**: `cmux hooks setup --agent codex`, `--agent opencode`, or bare `cmux hooks setup` (installs supported agents found on PATH, skips missing ones). Run install or uninstall commands only after the user agrees.274. **Session restore evidence**: `ls -lh ~/.cmuxterm/*-hook-sessions.json 2>/dev/null`. Missing stores usually mean the agent has not run inside cmux since hooks were installed, hooks are disabled, or the integration does not support resume capture.285. **Notification path**: `cmux notify "cmux diagnostic test"`, only when the user is ready for a visible test notification.29 30## Interpretation31 32- `cmux` not found: the CLI is not installed or not on PATH for this shell.33- `cmux ping` fails: the app is closed, unreachable through the current socket path, or automation access is disabled.34- No `CMUX_WORKSPACE_ID` or `CMUX_SURFACE_ID`: the command is running outside a cmux terminal. Some hooks intentionally no-op there.35- Hook config but no session store: run one supported agent inside cmux after installing hooks, then re-check.36- Session store but no agents on restore: check `terminal.autoResumeAgentSessions` and whether the saved executable still exists on PATH.37- Settings validation fails: fix the config first. Invalid config makes later symptoms misleading.38 39## Rules40 41- Stay read-only until the user asks to fix something.42- Never print raw hook files, session JSON, prompt logs, shell history, tokens, or API keys. Summarize file presence, size, modified time, and marker presence instead.43- Prefer a narrow fix such as `cmux hooks setup --agent codex` over reinstalling every integration.44- After a fix, rerun the diagnostic script and report the changed lines.45