[2.18.0] Add Dynamic Capability Discovery and iCloud sync patterns (#62)

* [2.17.0] Expand agent-native skill with mobile app learnings

Major expansion of agent-native-architecture skill based on real-world
learnings from building the Every Reader iOS app.

New reference documents:
- dynamic-context-injection.md: Runtime app state in system prompts
- action-parity-discipline.md: Ensuring agents can do what users can
- shared-workspace-architecture.md: Agents and users in same data space
- agent-native-testing.md: Testing patterns for agent-native apps
- mobile-patterns.md: Background execution, permissions, cost awareness

Updated references:
- architecture-patterns.md: Added Unified Agent Architecture, Agent-to-UI
  Communication, and Model Tier Selection patterns

Enhanced agent-native-reviewer with comprehensive review process covering
all new patterns, including mobile-specific verification.

Key insight: "The agent should be able to do anything the user can do,
through tools that mirror UI capabilities, with full context about the
app state."

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

* [2.18.0] Add Dynamic Capability Discovery and iCloud sync patterns

New patterns in agent-native-architecture skill:

- **Dynamic Capability Discovery** - For agent-native apps integrating with
  external APIs (HealthKit, HomeKit, GraphQL), use a discovery tool (list_*)
  plus a generic access tool instead of individual tools per endpoint.
  (Note: Static mapping is fine for constrained agents with limited scope.)

- **CRUD Completeness** - Every entity needs create, read, update, AND delete.

- **iCloud File Storage** - Use iCloud Documents for shared workspace to get
  free, automatic multi-device sync without building a sync layer.

- **Architecture Review Checklist** - Pushes reviewer findings earlier into
  design phase. Covers tool design, action parity, UI integration, context.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

---------

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

plugins/compound-engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
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