v0.13.0 — ticket capture skill (log & size, don't implement)

New: the ticket capture skill

Fixes a recurring behavioural failure: saying "new bug" / "new ticket" / "new task" means capture this work for later — but Claude would often start implementing instead.

• skills/ticket/SKILL.md — auto-triggers on "new bug/ticket/task" (and serves /ticket). Enforces a strict capture discipline: quick read-only investigation → classify (type/priority) → size with a Fibonacci effort → create via tickets.add → STOP. It never edits code; the work is only picked up on an explicit follow-up.
• commands/todo.md — a /todo alias that delegates to the same discipline.
• Tests — skills.test.ts guards the skill's frontmatter and its "don't implement" discipline so it can't be silently dropped; commands.test.ts now covers todo.

568 tests green.