smart-install.js used stdio: 'inherit' for execSync calls, leaking
plain-text install output (bun/npm progress) to stdout. Claude Code
expects hook output to start with '{' (valid JSON), so this caused
a confusing "SessionStart:startup hook error" on every session start.
Changes:
- Pipe stdout on all execSync calls to prevent non-JSON stdout leak
- Output {"continue":true,"suppressOutput":true} on both success and
error paths so Claude Code always receives valid JSON
- Add tests verifying no stdio:'inherit' remains and JSON is output
Fixes#1253
Vibe-coded by Ousama Ben Younes
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Ben Younes
4616f7ab1c