chore: WIP pre-implement

Bundled hygiene commit before cycle-3 /implement (AZ-776, AZ-777). Mixes
two concerns by user choice (autodev option B):

- Cycle-3 autodev artifacts not yet committed by Step 9 (new-task):
  task specs for AZ-776 / AZ-777 under _docs/02_tasks/todo/ and the
  updated _docs/02_tasks/_dependencies_table.md.
- Accumulated skill / rule tooling maintenance under .cursor/ (skills:
  autodev, code-review, decompose, deploy, implement, new-task, plan,
  refactor, retrospective, test-spec; rules: coderule, cursor-meta,
  meta-rule, testing; new release skill scaffolding).
- Autodev bootstrap state: _docs/_autodev_state.md (step 10 in_progress)
  and _docs/_process_leftovers/2026-05-11_d_cross_cve_1_opencv_pin_deferred.md
  (replay timestamp refreshed; gtsam 4.2 still numpy<2-only).

Co-authored-by: Cursor <cursoragent@cursor.com>

.cursor/skills/plan/steps/01_artifact-management.md

@@ -26,6 +26,10 @@ DOCUMENT_DIR/
 │   └── deployment_procedures.md
 ├── risk_mitigations.md
 ├── risk_mitigations_02.md          (iterative, ## as sequence)
+├── adr/
+│   ├── 001_[decision_slug].md
+│   ├── 002_[decision_slug].md
+│   └── ...
 ├── components/
 │   ├── 01_[name]/
 │   │   ├── description.md
@@ -66,6 +70,8 @@ DOCUMENT_DIR/
 | Step 3 | Common helpers generated | `common-helpers/[##]_helper_[name].md` |
 | Step 3 | Diagrams generated | `diagrams/` |
 | Step 4 | Risk assessment complete | `risk_mitigations.md` |
+| Step 4.5 | Each ADR captured | `adr/NNN_[decision_slug].md` |
+| Step 4.5 | ADR index updated | `adr/README.md` |
 | Step 5 | Tests written per component | `components/[##]_[name]/tests.md` |
 | Step 6 | Epics created in work item tracker | Tracker via MCP |
 | Final | All steps complete | `FINAL_report.md` |
@@ -85,3 +91,15 @@ If DOCUMENT_DIR already contains artifacts:
 2. Identify the last completed step based on which artifacts exist
 3. Resume from the next incomplete step
 4. Inform the user which steps are being skipped
+
+#### Step 4.5 (ADR Capture) resumption rule
+
+ADR files have a `Status` field that disambiguates "step in progress" from "step done":
+
+- `Status: Proposed` → Step 4.5 is **in progress**. The user has not yet hit the BLOCKING gate (or hit it and chose B/C/D, which kept files at `Proposed`). Resume Step 4.5 at Phase 4.5f and re-present the BLOCKING Choose to the user. Do NOT skip to Step 5.
+- `Status: Accepted` AND `adr/README.md` index exists AND every Accepted ADR is referenced in the index → Step 4.5 is **done**. Skip to Step 5.
+- `Status: Accepted` but `adr/README.md` is missing or out of date → Step 4.5 is **partially complete**. Resume at Phase 4.5d (Maintain the ADR Index) before moving on.
+- Mixed `Proposed` + `Accepted` files in the same directory → Step 4.5 is **in progress** with prior partial confirmations. Resume at Phase 4.5f and re-present only the still-`Proposed` ADRs.
+- Empty `adr/` directory or no `adr/` directory → Step 4.5 has not started yet. Begin at Phase 4.5a.
+
+The `Date` field on every Accepted ADR is the date the user confirmed it; do not regenerate it during resumption.