multica-ai/multica · error

execenv: remove existing env: %w

Error message

execenv: remove existing env: %w

What it means

Error "execenv: remove existing env: %w" thrown in multica-ai/multica.

Source

Thrown at server/internal/daemon/execenv/execenv.go:353

		return nil, fmt.Errorf("execenv: task ID is required")
	}

	envRoot := filepath.Join(params.WorkspacesRoot, params.WorkspaceID, shortID(params.TaskID))

	// Self-heal the root-level daemon marker on every task start so a marker
	// removed while the daemon runs is restored before the agent spawns. The
	// per-workdir marker written below only covers cwds inside the workdir;
	// the root marker keeps the CLI fail-closed guard active for subprocesses
	// that lose all MULTICA_* env vars AND escape above the workdir. Non-fatal:
	// without it the workdir marker still protects the common case.
	if err := EnsureWorkspacesRootMarker(params.WorkspacesRoot); err != nil && logger != nil {
		logger.Warn("execenv: workspaces root marker not written; fail-closed guard limited to the task workdir", "error", err)
	}

	// Remove existing env if present (defensive — task IDs are unique).
	if _, err := os.Stat(envRoot); err == nil {
		if err := os.RemoveAll(envRoot); err != nil {
			return nil, fmt.Errorf("execenv: remove existing env: %w", err)
		}
	}

	// Create directory tree. For the standard flow the agent's workdir is
	// envRoot/workdir; for local_directory tasks the user's path takes its
	// place and we only need to create the scratch directories under
	// envRoot.
	workDir := filepath.Join(envRoot, "workdir")
	scratchDirs := []string{filepath.Join(envRoot, "output"), filepath.Join(envRoot, "logs")}
	if params.LocalWorkDir == "" && params.LocalWorktree == nil {
		scratchDirs = append(scratchDirs, workDir)
	} else if params.LocalWorkDir != "" {
		workDir = params.LocalWorkDir
	}
	for _, dir := range scratchDirs {
		if err := os.MkdirAll(dir, 0o755); err != nil {
			return nil, fmt.Errorf("execenv: create directory %s: %w", dir, err)
		}

View on GitHub (pinned to 2c0912b6ec)

Solutions

1. Check permissions to remove the existing environment; remove it manually if needed.

When it happens

Trigger: Thrown at server/internal/daemon/execenv/execenv.go:353 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of multica-ai/multica@2c0912b6ec (2026-08-15). Data as JSON: /api/errors/851c82ed99127c4c. Report an issue: GitHub.