Chameleon

Fixed

• The per-edit conformance lint's ADVISORY is now diff-scoped: an Edit /
  MultiEdit is nagged only for the advisory findings it INTRODUCED, not for
  every pre-existing convention issue elsewhere in the file. Whole-file
  attribution -- an edit flagged for a style / convention issue on a line it
  never touched -- was the top false-positive source across every effectiveness
  eval (79 to 100% of per-edit findings). chameleon reconstructs the pre-edit
  content from the tool input, lints it the same way as the post-edit content,
  and drops the advisory findings present in both.
  • ENFORCEMENT is unchanged. Every block-eligible rule (secrets, eval,
    phantom-import, naming / import / inheritance / jsx / file-naming) is exempt
    and surfaces whole-file, so the block partition, the inline block, and the
    turn-end Stop-backstop arming are computed from exactly the same findings as
    before. A pre-existing broken import or a credential still surfaces and
    blocks; a follow-up clean edit can never disarm a block-eligible violation an
    earlier edit in the turn introduced.
  • Measured 93 to 100% fewer per-edit advisory findings on benign edits across
    Ruby, TypeScript (NestJS), and React fixtures, while every genuinely
    introduced finding still surfaces (verified against an injected-violation
    control).
  • Scope is narrow and fail-safe: Write / NotebookEdit author the whole
    file (no pre-edit content to diff against, so whole-file lint stands), a
    replace_all edit or any ambiguous reversal falls back to whole-file, and
    any error fails open to the whole-file findings. Kill switch:
    CHAMELEON_DIFF_LINT=0.