drop minikube support (#900)

## Summary

- Remove `components/manifests/minikube/` directory and
`docs/internal/developer/local-development/minikube.md`
- Convert CI workflow (`.github/workflows/test-local-dev.yml`) from
minikube to kind
- Remove minikube-specific Makefile targets (`local-reload-*`,
`_build-and-load`, `_show-access-info`, `check-minikube`,
`local-sync-version`); alias
`local-up`/`local-down`/`local-clean`/`local-rebuild` to their kind
equivalents
- Update `local-test-quick` to use kind cluster checks instead of
`minikube ip`
- Update `check-local-context` to only accept `kind-` prefixed contexts
- Update all documentation, diagrams, skill files, and test scripts

## Test plan

- [ ] `make kind-up` creates cluster successfully
- [ ] `make local-up` works as alias for `kind-up`
- [ ] `make local-test-quick` passes against a running kind cluster
- [ ] `make local-status` shows correct kind cluster info
- [ ] `make local-down` works as alias for `kind-down`
- [ ] CI workflow runs successfully with kind
- [ ] `make help` output looks correct
- [ ] `tests/local-dev-test.sh --ci` passes

Fixes #898

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: ktdreyer

.claude/skills/dev-cluster/README.md

@@ -1,6 +1,6 @@
 # Development Cluster Management Skill
 
-A skill for managing Ambient Code Platform development clusters (kind and minikube) for testing local changes.
+A skill for managing Ambient Code Platform development clusters (kind) for testing local changes.
 
 ## Purpose
 
@@ -19,20 +19,14 @@ Invoke this skill when working on the Ambient Code Platform and you need to:
 - Debug deployment issues
 - Iterate quickly on component changes
 
-## Cluster Options
+## Cluster: Kind
 
-### Kind (Recommended for Quick Testing)
-- Fast cluster creation
+- Fast cluster creation (~30 seconds)
 - Uses production Quay.io images by default
+- `LOCAL_IMAGES=true` builds and loads from source
 - Lightweight single-node cluster
 - Aligns with CI/CD setup
-- Access: http://localhost:8080
-
-### Minikube (Recommended for Development)
-- Builds images locally from source
-- Hot-reload commands for quick iterations
-- Full feature set for development
-- Access: http://localhost:3000
+- Access via port-forwarding (see `make kind-status` for ports)
 
 ## Key Features
 
@@ -56,16 +50,6 @@ The skill will:
 5. Verify deployment
 6. Provide access information
 
-### Development with Hot Reload
-```
-User: "Set up minikube for frontend development"
-```
-The skill will:
-1. Create minikube cluster
-2. Build all components
-3. Configure hot-reload
-4. Show how to iterate quickly
-
 ### Troubleshooting
 ```
 User: "The backend pod is crash looping"
@@ -79,89 +63,26 @@ The skill will:
 
 ## Supported Commands
 
-The skill knows all relevant Makefile targets:
-
-**Kind:**
 - `make kind-up` - Create cluster
+- `make kind-up LOCAL_IMAGES=true` - Create cluster with locally-built images
 - `make kind-down` - Destroy cluster
-
-**Minikube:**
-- `make local-up` - Create cluster with local builds
-- `make local-rebuild` - Rebuild all and restart
-- `make local-reload-backend` - Hot reload backend only
-- `make local-reload-frontend` - Hot reload frontend only
-- `make local-reload-operator` - Hot reload operator only
-- `make local-status` - Check status
-- `make local-logs-*` - View logs
-- `make local-clean` - Destroy cluster
-
-**Building:**
+- `make kind-rebuild` - Rebuild all, reload, restart
+- `make kind-port-forward` - Port-forward services
+- `make kind-status` - Show cluster status and ports
 - `make build-all` - Build all images
 - `make build-backend` - Build backend only
 - `make build-frontend` - Build frontend only
 - `make build-operator` - Build operator only
-
-## Platform Components
-
-The skill understands all platform components:
-
-| Component | Path | Image | Purpose |
-|-----------|------|-------|---------|
-| Backend | `components/backend` | `vteam_backend:latest` | API server |
-| Frontend | `components/frontend` | `vteam_frontend:latest` | Web UI |
-| Operator | `components/operator` | `vteam_operator:latest` | K8s operator |
-| Runner | `components/runners/ambient-runner` | `vteam_claude_runner:latest` | Claude Code runner |
-| State Sync | `components/runners/state-sync` | `vteam_state_sync:latest` | S3 persistence |
-| Public API | `components/public-api` | `vteam_public_api:latest` | External API |
-
-## Typical Workflow
-
-1. **Make code changes** in one or more components
-2. **Invoke the skill** with "test this in kind" or similar
-3. **Skill analyzes changes** and builds necessary images
-4. **Skill creates/updates cluster** and deploys changes
-5. **Skill verifies deployment** and provides access info
-6. **Developer tests changes** in the running cluster
-7. **Iterate as needed** with hot-reload commands
+- `make local-status` - Check pod status
+- `make local-logs` - View all logs
 
 ## Requirements
 
-- Access to /workspace/repos/platform repository
-- kind or minikube installed
+- kind installed
 - kubectl installed
 - podman or docker installed
 - Make installed
 
-## Troubleshooting
-
-The skill handles common issues:
-
-- **ImagePullBackOff**: Ensures images are loaded with correct pull policy
-- **CrashLoopBackOff**: Analyzes logs and suggests fixes
-- **Port conflicts**: Helps resolve port forwarding issues
-- **Stale images**: Forces rebuild and restart
-
-## Integration Points
-
-This skill integrates with:
-- The platform repository Makefile
-- Git for change detection
-- kubectl for cluster management
-- kind/minikube for cluster creation
-- Container runtime (podman/docker) for image management
-
-## Best Practices
-
-1. Use kind for quick validation
-2. Use minikube for iterative development
-3. Always check logs after deployment
-4. Clean up clusters when done
-5. Build only what changed
-6. Verify image pull policy for local images
-
 ## See Also
 
-- [Platform Repository README](/workspace/repos/platform/README.md)
-- [Platform Makefile](/workspace/repos/platform/Makefile)
 - [Kind Documentation](https://kind.sigs.k8s.io/)
-- [Minikube Documentation](https://minikube.sigs.k8s.io/)