feat(mvp): working secrets-engine CLI for the whynot-design npm publish lane

Implements SECRETS-WP-0002 end to end as a uv-managed Python package:

- catalog: non-secret lane registry + strict validator (build/test/prod)
- stage roles + OpenBao ACL policies; guards refuse wildcards, sys/, identity/,
  admin names, and cross-stage paths before any backend call
- plan/apply: dry-run-first, idempotent policy + approle apply, decision-gated
- decisions: State Hub lookup with local-fixture fallback; non-secret evidence
  to JSONL + hub progress, scrubbed of any value
- provision/verify: mode-0600 file import + generated test values; positive/
  negative checks that never print the value
- exec delivery: `exec --catalog ... -- npm publish` injects the token via a
  temp .npmrc for the child only, cleaned up on exit/failure/interrupt
- ops-warden routing contract + hardening backlog docs
- 34 tests incl. live OpenBao integration; scripts/demo-e2e.sh runs the full
  chain against a throwaway bao dev server

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/rules/stack-and-commands.md

@@ -1,27 +1,34 @@
 ## Stack
 
-- **Language:** Markdown-first registry and planning repo (no application runtime yet)
-- **Key deps:** State Hub ADR-001 workplans, `registry/indexes/capabilities.yaml`
+- **Language:** Python 3.11+ CLI (`src/secrets_engine/`), `uv`-managed, hatchling build
+- **Backend:** OpenBao, reached only via the `bao` CLI adapter (`openbao.py`)
+- **Key deps:** PyYAML (runtime), pytest (dev); State Hub for decisions/evidence
+- **Entry point:** `secrets-engine` (console script → `secrets_engine.cli:main`)
 
 ## Dev Commands
 
 ```bash
+# Install (editable, with dev extras)
+uv venv && uv pip install -e ".[dev]"
+source .venv/bin/activate
+
+# Run the CLI
+secrets-engine --version
+secrets-engine catalog list
+
+# Test (unit + live OpenBao integration; integration auto-skips without `bao`)
+SECRETS_ENGINE_HUB_URL="" python -m pytest -q
+
+# Full pilot chain live against a throwaway OpenBao dev server
+SECRETS_ENGINE_HUB_URL="" bash scripts/demo-e2e.sh
+
 # Orient (offline-safe)
 cat .custodian-brief.md
-cat README.md
-cat SCOPE.md
 ls workplans/
 
-# Consumer bootstrap docs
-cat docs/statehub-register.md
-cat docs/template-validation-checklist.md
+# After workplan edits — from ~/state-hub
+make fix-consistency REPO=secrets-engine
 
-# After workplan or registry edits — from ~/state-hub
-make fix-consistency REPO=repo-seed
-
-# Validate registry entries (from reuse-surface checkout)
-reuse-surface validate --root .
-
-# Sanity-check markdown / registry edits
+# Sanity-check edits
 git diff --check
 ```