Replace the broad allowlist approach with a targeted denylist that only
warns on known ad-hoc filenames (NOTES, TODO, SCRATCH, TEMP, DRAFT,
BRAINSTORM, SPIKE, DEBUG, WIP) outside structured directories. This
eliminates false positives for legitimate markdown-heavy workflows while
still catching impulse documentation files.
Closes#988
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Lidang-Jiang <lidangjiang@gmail.com>