chameleon 4.5.6

Changed

• The deep-work brief is a fixed 9-slot template, completing what v4.5.5 did for the
  delivery report. Round 4 of the graded sonnet runs scored 9/10 with the report template fully
  complied — the one surviving omission was the brief's step plan, which sonnet keeps collapsing
  into the files list. The plan slot now has a literal per-step shape (". ->
  verify: ") with the collapse explicitly named as non-compliant, and the
  brief gets the same pre-send completeness pass as the report.