novel-doomsday-resurgence/skills/capability-evolver/src/canary.js

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// Canary script: run in a forked child process to verify index.js loads
// without crashing. Exit 0 = safe, non-zero = broken.
//
// This is the last safety net before solidify commits an evolution.
// If a patch broke index.js (syntax error, missing require, etc.),
// the canary catches it BEFORE the daemon restarts with broken code.
try {
require('../index.js');
process.exit(0);
} catch (e) {
process.stderr.write(String(e.message || e).slice(0, 500));
process.exit(1);
}