Add /tasks skill for Google Tasks

- New gtasks skill with thin wrapper around morning-report collector
- Register /tasks command with /todo, /todos aliases
- Design doc at docs/plans/2026-01-05-gtasks-skill-design.md

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/plans/2026-01-05-gtasks-skill-design.md

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+# Design: Google Tasks Skill
+
+## Summary
+
+Minimal `/tasks` skill to list Google Tasks. Thin wrapper around existing morning-report collector.
+
+## Scope
+
+- **In scope:** List pending tasks
+- **Out of scope (for now):** Complete, add, delete, filter by list
+
+## Structure
+
+```
+skills/gtasks/
+├── SKILL.md
+└── scripts/
+    └── list.py
+```
+
+## SKILL.md
+
+```yaml
+---
+name: gtasks
+description: Google Tasks read access — list pending tasks. Use when asked about tasks, todos, or what needs to be done.
+allowed-tools:
+  - Bash
+  - Read
+---
+```
+
+Quick command: `$GMAIL_PY ~/.claude/skills/gtasks/scripts/list.py`
+
+Request routing:
+| User Request | Action |
+|--------------|--------|
+| "What are my tasks?" | `list.py` |
+| "Show my todos" | `list.py` |
+| "/tasks" | `list.py` |
+
+Policy: Read-only, summarize results.
+
+## list.py Script
+
+Thin wrapper that imports from `morning-report/scripts/collectors/gtasks.py`.
+
+- Default shows up to 10 tasks
+- Optional arg for more: `list.py 20`
+- Reuses existing auth and fetch logic
+
+## Registry Updates
+
+**skills:**
+```json
+"gtasks": {
+  "description": "Google Tasks read access - list pending tasks",
+  "triggers": ["tasks", "todo", "to do", "to-do", "pending"]
+}
+```
+
+**commands:**
+```json
+"/tasks": {
+  "description": "List Google Tasks",
+  "aliases": ["/todo", "/todos"],
+  "invokes": "skill:gtasks"
+}
+```
+
+## Future Expansion
+
+- Complete task by ID
+- Filter by task list
+- Show due dates