permissionMode: acceptEdits in gsd-executor and gsd-debugger frontmatter
is Claude Code-specific and causes Gemini CLI to hard-fail on agent load
with "Unrecognized key(s) in object: 'permissionMode'". The field also
has no effect in Claude Code (subagent Write permissions are controlled
at runtime level regardless). Remove it from both agents and update
tests to enforce cross-runtime compatibility.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>