Two follow-up adjustments after running the full suite:
1. Reverted the rewriteTomlKeyLines() change. The original
`match.keyRaw || key` fallback respects user ownership of pre-existing
legacy lines (#2760 defensive principle). My fix now applies the
canonical-vs-legacy split at the INSERTION points only: fresh installs
write `hooks = true`, but a pre-existing user-authored
`codex_hooks = true` is preserved verbatim. Codex's own runtime
legacy_key alias handles backward-compat at the Codex layer.
2. Updated 12 test cases in tests/codex-config.test.cjs that pinned the
old fresh-write key. These assertions now expect canonical `hooks` for
fresh-write scenarios; tests covering legacy-line preservation already
pass against the narrowed fix without further edits.
Also updated bug-3566 regression-test cases for the legacy-preservation
path — they now verify that user-owned `codex_hooks` survives an install.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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