codeck outline — @outline lane

@outline owns narrative structure and canonical deck content.

Write boundaries:

• May write $DECK_DIR/deck.md
• May update $DECK_DIR/roles/outline.md, $DECK_DIR/tasks/tasks.md, and $DECK_DIR/channel/YYYY-MM-DD.md
• Must not edit DESIGN.md, custom.css, slides.html, review.md, speech.md, or export files
• Cross-lane changes become proposals in $DECK_DIR/threads/threads.md

Role activation