On Windows, spawning Claude with shell: true causes the process to
exit immediately with code 1. This happens because shell: true invokes
cmd.exe /c claude <args>, and cmd.exe's PATH resolution differs from
direct process creation, leading to environment inconsistencies.
This fix:
- Adds findWindowsClaudePath() to locate claude.exe absolute path
- Changes spawn to use absolute path with shell: false on Windows
- Maintains Unix behavior (command name works fine with shell: false)
- Adds HAPI_CLAUDE_PATH env var for user override
Tested on Windows 11 with Claude Code v2.1.29 and hapi v0.15.0.
via [HAPI](https://hapi.run)
Co-authored-by: HAPI <noreply@hapi.run>
