Driver Plan

<!-- Orchestrator contract:
  role: driver
  reads: [AGENTS.md, SPEC.md, ARCHITECTURE.md, docs/runbook.md, ROADMAP.md]
  writes: [ROADMAP.md, PLAN.md, TASK_QUEUE.md, NOW.md, CONTEXT.md, DIFF_SUMMARY.md, PROOF.md]
  never_writes: [REVIEW_NOTES.md, DIFF_REVIEW_NOTES.md, REREVIEW_NOTES.md]
  produces: [STEP_RESULT.json]
-->
# 1. Driver — Start Major Bugfix Slice

You are in Driver mode.

Goal:
Create a major bugfix slice packet with strict safety and rollback discipline.

Steps:
1) Create `changes/<yyyy-mm-dd>-major-bugfix-<slug>/`.
2) Update ROADMAP active slice pointer.
3) Create/initialize:
- PLAN.md
- TASK_QUEUE.md
- NOW.md
- CONTEXT.md
- DIFF_SUMMARY.md (empty template)
- PROOF.md (empty template)
4) Ensure PLAN includes incident summary, repro, impact/severity, blast radius, rollback triggers, verification, and acceptance.
5) Ensure PLAN also includes `Pre-merge Operations`.
6) Request reviewer plan pass.

Output checklist:
- [ ] slice folder + docs created
- [ ] ROADMAP updated
- [ ] STEP_RESULT written

## STEP_RESULT.json (required)