This skill extends superpowers:writing-plans. Follow the superpowers skill completely. When the following events occur, apply these additions:

Before: First action of the skill

1. Detect ticket ID from current branch name (regex [A-Z]+-[0-9]+); if none, use none.
2. Call mark_chapter with {title: "Plan — <TICKET>", summary: "Writing implementation plan"}. If mark_chapter is unavailable (e.g. running outside Claude Code), skip silently.
3. Echo ANSI terminal-title escape:

   printf '\e]2;%s — Plan\007' "<TICKET>"

After: Plan saved to disk

Invoke devflow:phase-handoff with arguments --phase plan --next-phase lock-tests. The phase-handoff skill writes the frozen-state file and prompts the user to /compact before the next phase begins. Do NOT auto-invoke superpowers:executing-plans from here — implementation must start in a clean context after /compact.

$ARGUMENTS