## Summary
- **C0 (Quick Fix):** Now explicitly allows direct-to-main commits with no PR required — for low-risk, fix-forward-safe changes
- **C1 (Human Review):** New docs-first workflow with branch deployment (ArgoCD `--revision`, Ansible from checkout). Includes upgrade criteria for escalation to C2
- **C2 (Mikado Chain):** Introduces the **Mikado Branch Invariant** — strict commit ordering where card-introducing commits come first, followed by code progress, followed by card closures. Branch resets required when new prerequisites are discovered
Updates CLAUDE.md rules (3, 4, 8, 9) to reflect that C0 bypasses branching/PR requirements. Also updates ai-assistance-guide, how-to index, and docs-mikado task description.
## Files changed
- `CLAUDE.md` — rules and classification table
- `docs/how-to/agent-change-process.md` — full process rewrite
- `docs/tutorials/ai-assistance-guide.md` — branching and pitfalls sections
- `docs/how-to/how-to.md` — index description
- `mise-tasks/docs-mikado` — task description
- `docs/changelog.d/formalize-change-classification.doc.md` — changelog fragment
Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/259
Erich Blume
66b5b32f1d