Chameleon

Fixed

• The pre-write reuse-before-create nudge no longer fires on test functions. A
  test is authored to exercise one specific thing and is never an importable
  reuse target, yet two test functions share the test prefix plus a domain word
  or two, so the semantic name-token pass paired unrelated tests
  (test_validate_email_format "looks like the existing
  test_validate_email_shape"). Every observed false positive of this nudge over
  a long test campaign was test-on-test.

  The name-based passes (exact-name and semantic) now skip entirely when the
  edited file is a test, and a test function is never offered as a candidate on a
  production edit either. Production-to-production reuse detection — the real
  signal — is unchanged, as is the body-identical class-method duplication pass
  (a verbatim copied body is a genuine signal regardless of file). _is_test_file
  already recognizes the test conventions of all three languages, so the gate is
  language-agnostic.