multica-ai/multica · error

chmod temp config file: %w

Error message

chmod temp config file: %w

What it means

Before the final rename, the temp file is chmod'd to 0600 so the saved config is owner-only. That chmod failed — usually because the file was already gone (a concurrent cleaner) or because ownership changed mid-operation. The temp file is then removed and the save fails safely.

Source

Thrown at server/internal/cli/config.go:370

	// Write to a temp file in the same directory, then rename for atomicity.
	tmp, err := os.CreateTemp(dir, ".config-*.json.tmp")
	if err != nil {
		return fmt.Errorf("create temp config file: %w", err)
	}
	tmpPath := tmp.Name()
	if _, err := tmp.Write(append(data, '\n')); err != nil {
		tmp.Close()
		os.Remove(tmpPath)
		return fmt.Errorf("write temp config file: %w", err)
	}
	if err := tmp.Close(); err != nil {
		os.Remove(tmpPath)
		return fmt.Errorf("close temp config file: %w", err)
	}
	if err := os.Chmod(tmpPath, 0o600); err != nil {
		os.Remove(tmpPath)
		return fmt.Errorf("chmod temp config file: %w", err)
	}
	if err := os.Rename(tmpPath, path); err != nil {
		os.Remove(tmpPath)
		return fmt.Errorf("rename config file: %w", err)
	}
	return nil
}

View on GitHub (pinned to 2c0912b6ec)

Solutions

1. Serialize config saves per profile (a lockfile or running one CLI at a time) to eliminate the race
2. Exclude the config directory from temp-file cleaners
3. Ensure only one user account writes to a given task-local root
4. Simply retry the save — the next attempt will use a fresh temp file

if err := cli.SaveCLIConfig(cfg); err != nil && errors.Is(err, os.ErrNotExist) {
	// temp file vanished (race with cleaner); retry the save
	err = cli.SaveCLIConfig(cfg)
}

When it happens

Trigger: A concurrent process (another CLI instance, a tmp cleaner, antivirus) deleting the temp file between creation and chmod; or ownership confusion when different users run the CLI against the same task-local root.

Common situations: Two CLI invocations racing to save the same profile; systemd-tmpfiles or a cron job cleaning dot-prefixed temp files; concurrent daemon and manual CLI writes to one MULTICA_TASK_CONFIG_ROOT.

Related errors

• mint PAT: response missing token
• daemon profile is not resolved yet; token sync skipped
• runtime local skill discovery timed out
• runtime local skill import failed
• resolve profile %q: %w

AI-assisted analysis of multica-ai/multica@2c0912b6ec (2026-08-15). Data as JSON: /api/errors/738b1bed6ce44539. Report an issue: GitHub.