Self-review summary:

• Scope: public self-repair documentation plus a focused smoke assertion only.
• Change: records the shell command-substitution badcase for Markdown-rich PR/comment bodies and recommends single-quoted bodies, stdin/body-file, or connector/API calls.
• Validation passed locally:
  • python3 examples/interaction-pattern-catalog-smoke.py
  • git diff --check
  • loopx check on the two changed paths
• Merge status: normal merge is blocked by branch policy; auto-merge is disabled for this repository.

Findings: none from this review pass.

Open questions / assumptions: I treated this as public self-repair documentation plus a focused catalog assertion for shell-safe PR/comment posting. The change is narrow and does not alter runtime behavior.

Validation performed:

• python3 examples/interaction-pattern-catalog-smoke.py passed on the PR head.

Merge decision: hold for normal reviewer/branch-protection flow; no blocker found.