## Summary
- Removed `status: active` from `enforce-tag-immutability` card — its requirements are folded into the parent `harden-zot-registry` goal's `accessControl` configuration
- Updated `harden-zot-registry` with three-tier access control spec (anonymous read, artifact-workloads read+create, admins full)
- Added `artifact-workloads` group creation step to `register-zot-oidc-client`
- Added service account context to `wire-ci-registry-auth`
## Rationale
Tag immutability requires authentication to be meaningful. Without auth, everyone is anonymous and gets the same policy. Rather than client-side push checks, the registry enforces immutability server-side: CI gets `["read", "create"]` (no update/delete), so pushing an existing tag is rejected by zot itself.
## Test plan
- [ ] `mise run docs-check-links` passes
- [ ] `mise run docs-mikado` shows enforce-tag-immutability as resolved
Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/235
## Summary
- Replace the old pre-Mikado plan doc (`docs/how-to/plans/harden-zot-registry.md`) with a proper C2 Mikado chain in `docs/how-to/zot/`
- Root goal: `harden-zot-registry` — enable OIDC + API key auth on zot with anonymous pull preserved
- Three leaf prereqs: `register-zot-oidc-client`, `wire-ci-registry-auth`, `enforce-tag-immutability`
- Add Zot section to `how-to.md` index, remove plan entry from plans index
- All doc checks pass (`docs-check-links`, `docs-check-index`, `docs-mikado`)
## Changes
- **New:** `docs/how-to/zot/harden-zot-registry.md` — C2 Mikado root goal
- **New:** `docs/how-to/zot/register-zot-oidc-client.md` — Register OIDC client in Authentik
- **New:** `docs/how-to/zot/wire-ci-registry-auth.md` — Wire CI push paths with registry auth
- **New:** `docs/how-to/zot/enforce-tag-immutability.md` — Prevent version tag overwrites
- **Deleted:** `docs/how-to/plans/harden-zot-registry.md` — Old plan doc (content absorbed into Mikado cards)
- **Updated:** `docs/how-to/how-to.md` — Add Zot section, remove plan entry
- **Updated:** `docs/how-to/plans/plans.md` — Remove plan entry
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/229
