bug(windows): stock Kanban 0.1.46 fails to launch Claude and Codex runtimes with 'The command line is too long' #83

What happened?

On a fresh stock install of Kanban on Windows, the built-in Cline runtime works, but the external Claude and Codex Kanban Agent runtimes do not.

When I select Claude or Codex in the Kanban Agent sidebar, the embedded session does not stream properly. Instead, Kanban repeatedly shows:

The command line is too long

and then ends with:

[kanban] session exited with code 1

This reproduces in the stock install. The built-in Cline runtime works in the same setup, so this seems specific to the external agent runtime path on Windows rather than a general Kanban UI issue.

Steps to reproduce

1. Install the latest stock versions globally:

   npm i -g cline kanban

2. Start Kanban normally.
3. Open a project/workspace.
4. In the Kanban Agent runtime selector, choose Claude or Codex.
5. Open the Kanban Agent sidebar and start/use the session.
6. Observe repeated The command line is too long messages followed by [kanban] session exited with code 1.

Expected behavior

The Claude and Codex runtimes should launch normally and stream their session output in the Kanban Agent sidebar, similar to the built-in Cline runtime.

Kanban version

0.1.46

Environment

Windows 11 (10.0.26200.8037), Cline 2.11.0, Claude Code 2.1.85, Codex CLI 0.117.0, Node v22.22.0, npm 11.12.1