Bug: /design skill hangs on longer prompts regardless of flags

/design skill hangs on longer prompts regardless of flags

Environment:

• Command Code v0.27.0
• Model: default (taste-1)
• Platform: Linux (x64), Node v24.15.0
• Host: local machine

Steps to reproduce:

1. Run cmd with the /design skill
2. Submit a comprehensive design review prompt (covering UI audit of a multi-page application)
3. Command Code hangs indefinitely — no progress, no output, no error
4. Must be killed externally (SIGKILL)

Observed behavior:

• /design works reliably with --max-turns 10 and a short prompt (2-3 sentences)
• With longer prompts (describing a full site review) or without --max-turns limit, the process freezes after the first response
• The hang is not a timeout — it persists for hours with no CPU activity
• Occurs regardless of --max-turns, -p (non-interactive), or interactive flags
• No error logs are written; no crash report

Expected behavior:

• /design should process prompts of any reasonable length
• Should handle comprehensive design reviews spanning multiple pages/sections
• Should either complete, provide partial output, or return a clear error

Impact:
Blocks using /design for meaningful site-wide design audits. Only trivial single-component prompts work.

Additional context:
This was discovered while trying to run a full-site design audit of a React 19 application. The same review was successfully completed using alternative tools (impeccable detector + manual UI audit scripts), confirming the prompt content itself is valid.