Chameleon

Both review skills now faithfully follow the superpowers code-review discipline
(code-reviewer and receiving-code-review) they layer their repo-grounding on,
closing the discipline elements they had omitted.

Added

• pr-review covers the superpowers what-to-check categories it was missing, as
  hunk-gated advisory judgments: performance / scalability (a query or IO inside a
  loop, an unbounded load, an O(n^2) over request data on an added line), type
  safety, and documentation completeness. Edge cases (Step 3c) and signature drift
  (3c-i) now run ALWAYS, not only when a ticket is supplied.
• pr-review states the read-only-on-checkout discipline (never mutate the
  working tree / index / HEAD / branch; use git worktree for another revision),
  carries a one-line Reasoning under the Verdict (the superpowers Ready-to-merge
  assessment), and gained a grounded Recommendations section.
• receiving-code-review adds the five external-reviewer pre-implementation
  checks, the when-to-push-back trigger list (including legacy / backward-compat
  and lacks-context) with the uncomfortable-pushing-back rule, the
  gracefully-correct-your-own-pushback path, and the final verify-no-regressions
  pass.

Changed

• pr-review flags plan-level issues, not only the implementation: a spec line
  that is itself contradictory, infeasible, or wrong is called out, and a
  significant deviation is framed as a confirm-intent advisory.
• receiving-code-review's no-gratitude rule is now emphatic (no "Excellent
  feedback!", no "Thanks" for anything, delete it before sending), adds
  "Good catch - ..." as an allowed acknowledgment, and spells out the GitHub and
  Bitbucket inline-thread reply mechanism.

Fixed

• Edge cases (3c) no longer skipped in a no-ticket review. It was nested under
  "only when a Jira ticket is provided" while reviewer.md already delegated it
  per slice unconditionally; the two are now consistent, and only task context,
  completeness, and spec compliance remain ticket-gated.

Tests

• New tests/unit/test_superpowers_review_alignment.py pins every imported
  superpowers discipline element in both skill bodies.