Add cc-switch-dev-workflow skill

cc-switch-dev-workflow/references/knowledge-base/templates/tdd-plan-template.md

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+# Template: TDD Plan
+
+## Purpose
+为复杂实现任务提供统一的 `.plans/*.md` 结构，确保实施 agent 拿到的是高密度执行计划，而不是松散说明。
+
+## When to Use
+- Code 阶段的复杂任务
+- Alignment 阶段的缺口补齐任务
+
+## Inputs
+- `SPECS/*.md`
+- 现有代码现状
+- 当前任务范围
+
+## Outputs
+- `.plans/YYYY-MM-DD-<slug>.md`
+
+## Primary Agent/Model
+`GPT-5.4 Pro xhigh`
+
+## Secondary Agent/Model
+`Claude Opus 4.6`
+
+## Required Skills
+- `tdd-planning`
+
+## Steps
+1. 明确约束和依赖。
+2. 定义接口契约。
+3. 分阶段列出测试与实现顺序。
+
+## Exit Criteria
+- 实现 agent 无需回看完整 Spec 就能开始做 TDD
+
+## Failure Recovery
+- 如果计划没有测试场景或验收标准，计划不合格
+
+## Related Templates
+- [`todo-yaml-template.md`](./todo-yaml-template.md)
+
+## Template
+```markdown
+# TDD Plan: <Feature>
+
+## Goal
+- 
+
+## Scope
+- Included:
+- Excluded:
+
+## Constraints
+- 
+
+## Current State
+- 
+
+## Architecture
+- Modules touched:
+- Dependency order:
+
+## Interface Contract
+- Public API:
+- Input:
+- Output:
+- Errors:
+
+## Test Plan
+1. Failing test:
+2. Minimal implementation:
+3. Refactor:
+
+## Phases
+### Phase 1
+- 
+
+### Phase 2
+- 
+
+## Validation
+- Unit tests:
+- Integration tests:
+- Lint/build:
+
+## Acceptance Criteria
+- 
+```