multica-ai/multica · error

marshal cursor project root: %w

Error message

marshal cursor project root: %w

What it means

Error "marshal cursor project root: %w" thrown in multica-ai/multica.

Source

Thrown at server/internal/daemon/execenv/cursor_mcp.go:262

	return append(data, '\n'), nil
}

func cursorMcpApprovalKeys(projectRoot string, servers map[string]json.RawMessage) ([]string, error) {
	names := make([]string, 0, len(servers))
	for name := range servers {
		names = append(names, name)
	}
	sort.Strings(names)

	approvals := make([]string, 0, len(names))
	for _, name := range names {
		server, err := marshalCursorMcpApprovalServer(servers[name])
		if err != nil {
			return nil, fmt.Errorf("marshal mcp_servers.%s for cursor approval: %w", name, err)
		}
		pathJSON, err := json.Marshal(projectRoot)
		if err != nil {
			return nil, fmt.Errorf("marshal cursor project root: %w", err)
		}
		payload := []byte(`{"path":`)
		payload = append(payload, pathJSON...)
		payload = append(payload, []byte(`,"server":`)...)
		payload = append(payload, server...)
		payload = append(payload, '}')

		sum := sha256.Sum256(payload)
		approvals = append(approvals, name+"-"+hex.EncodeToString(sum[:])[:16])
	}
	return approvals, nil
}

func marshalCursorMcpApprovalServer(raw json.RawMessage) ([]byte, error) {
	compact := &bytes.Buffer{}
	if err := json.Compact(compact, raw); err != nil {
		return nil, err
	}

View on GitHub (pinned to 2c0912b6ec)

Solutions

1. Retry; the cursor project root payload could not be serialized.

When it happens

Trigger: Thrown at server/internal/daemon/execenv/cursor_mcp.go:262 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/cc6f33b2151e4879. Report an issue: GitHub.