Claude-Code-Workflow/.claude/skills/team-skill-designer/specs/team-design-patterns.md

Team Command Design Patterns

Extracted from 5 production team commands: coordinate, plan, execute, test, review Extended with 10 collaboration patterns for diverse team interaction models

---

Pattern Architecture

Team Design Patterns
├── Section A: Infrastructure Patterns (8)    ← HOW to build a team command
│   ├── Pattern 1: Message Bus Integration
│   ├── Pattern 2: YAML Front Matter
│   ├── Pattern 3: Task Lifecycle
│   ├── Pattern 4: Five-Phase Execution
│   ├── Pattern 5: Complexity-Adaptive Routing
│   ├── Pattern 6: Coordinator Spawn Integration
│   ├── Pattern 7: Error Handling Table
│   └── Pattern 8: Session File Structure
│
└── Section B: Collaboration Patterns (10)    ← HOW agents interact
    ├── CP-1: Linear Pipeline (线性流水线)
    ├── CP-2: Review-Fix Cycle (审查修复循环)
    ├── CP-3: Parallel Fan-out/Fan-in (并行扇出扇入)
    ├── CP-4: Consensus Gate (共识门控)
    ├── CP-5: Escalation Chain (逐级升级)
    ├── CP-6: Incremental Delivery (增量交付)
    ├── CP-7: Swarming (群策攻关)
    ├── CP-8: Consulting/Advisory (咨询顾问)
    ├── CP-9: Dual-Track (双轨并行)
    └── CP-10: Post-Mortem (复盘回顾)

Section B collaboration patterns are documented in: collaboration-patterns.md

---

When to Use

Phase	Usage	Section
Phase 0	Understand all patterns before design	All sections
Phase 2	Select applicable infrastructure + collaboration patterns	Pattern catalog
Phase 3	Apply patterns during generation	Implementation details
Phase 4	Verify compliance	Checklists

---

Section A: Infrastructure Patterns

Pattern 1: Message Bus Integration

Every teammate must use mcp__ccw-tools__team_msg for persistent logging before every SendMessage.

Structure

// BEFORE every SendMessage, call:
mcp__ccw-tools__team_msg({
  operation: "log",
  team: teamName,
  from: "<role-name>",       // planner | executor | tester | <new-role>
  to: "coordinator",
  type: "<message-type>",
  summary: "<human-readable summary>",
  ref: "<optional file path>",
  data: { /* optional structured payload */ }
})

Standard Message Types

Type	Direction	Trigger	Payload
plan_ready	planner -> coordinator	Plan generation complete	{ taskCount, complexity }
plan_approved	coordinator -> planner	Plan reviewed	{ approved: true }
plan_revision	planner -> coordinator	Plan modified per feedback	{ changes }
task_unblocked	coordinator -> any	Dependency resolved	{ taskId }
impl_complete	executor -> coordinator	Implementation done	{ changedFiles, syntaxClean }
impl_progress	any -> coordinator	Progress update	{ batch, total }
test_result	tester -> coordinator	Test cycle end	{ passRate, iterations }
review_result	tester -> coordinator	Review done	{ verdict, findings }
fix_required	any -> coordinator	Critical issues	{ details[] }
error	any -> coordinator	Blocking error	{ message }
shutdown	coordinator -> all	Team dissolved	{}

Collaboration Pattern Message Types

Type	Used By	Direction	Trigger
vote	CP-4 Consensus	any -> coordinator	Agent casts vote on proposal
escalate	CP-5 Escalation	any -> coordinator	Agent escalates unresolved issue
increment_ready	CP-6 Incremental	executor -> coordinator	Increment delivered for validation
swarm_join	CP-7 Swarming	any -> coordinator	Agent joins swarm on blocker
consult_request	CP-8 Consulting	any -> specialist	Agent requests expert advice
consult_response	CP-8 Consulting	specialist -> requester	Expert provides advice
sync_checkpoint	CP-9 Dual-Track	any -> coordinator	Track reaches sync point
retro_finding	CP-10 Post-Mortem	any -> coordinator	Retrospective insight

Adding New Message Types

When designing a new role, define role-specific message types following the convention:

• {action}_ready - Work product ready for review
• {action}_complete - Work phase finished
• {action}_progress - Intermediate progress update

CLI Fallback

When mcp__ccw-tools__team_msg MCP is unavailable, use ccw team CLI as equivalent fallback:

// Fallback: Replace MCP call with Bash CLI (parameters map 1:1)
Bash(`ccw team log --team "${teamName}" --from "<role>" --to "coordinator" --type "<type>" --summary "<summary>" [--ref <path>] [--data '<json>'] --json`)

Parameter mapping: team_msg(params) → ccw team <operation> --team <team> [--from/--to/--type/--summary/--ref/--data/--id/--last] [--json]

Coordinator uses all 4 operations: log, list, status, read Teammates primarily use: log

Message Bus Section Template

## 消息总线

每次 SendMessage **前**，必须调用 `mcp__ccw-tools__team_msg` 记录消息：

\`\`\`javascript
mcp__ccw-tools__team_msg({ operation: "log", team: teamName, from: "<role>", to: "coordinator", type: "<type>", summary: "<summary>" })
\`\`\`

### 支持的 Message Types

| Type | 方向 | 触发时机 | 说明 |
|------|------|----------|------|
| `<type>` | <role> → coordinator | <when> | <what> |

### CLI 回退

当 `mcp__ccw-tools__team_msg` MCP 不可用时，使用 `ccw team` CLI 作为等效回退：

\`\`\`javascript
// 回退: 将 MCP 调用替换为 Bash CLI（参数一一对应）
Bash(\`ccw team log --team "${teamName}" --from "<role>" --to "coordinator" --type "<type>" --summary "<summary>" --json\`)
\`\`\`

**参数映射**: `team_msg(params)` → `ccw team log --team <team> --from <role> --to coordinator --type <type> --summary "<text>" [--ref <path>] [--data '<json>'] [--json]`

---

Pattern 2: YAML Front Matter

Every team command file must start with standardized YAML front matter.

Structure

---
name: <command-name>
description: Team <role> - <capabilities in Chinese>
argument-hint: ""
allowed-tools: SendMessage(*), TaskUpdate(*), TaskList(*), TaskGet(*), TodoWrite(*), Read(*), Write(*), Edit(*), Bash(*), Glob(*), Grep(*), Task(*)
group: team
---

Field Rules

Field	Rule	Example
name	Lowercase, matches filename	plan, execute, test
description	Team <role> - prefix + Chinese capability list	Team planner - 多角度代码探索、结构化实现规划
argument-hint	Empty string for teammates, has hint for coordinator	""
allowed-tools	Start with SendMessage(*), TaskUpdate(*), TaskList(*), TaskGet(*)	See each role
group	Always team	team

Minimum Tool Set (All Teammates)

SendMessage(*), TaskUpdate(*), TaskList(*), TaskGet(*), TodoWrite(*), Read(*), Bash(*), Glob(*), Grep(*)

Role-Specific Additional Tools

Role Type	Additional Tools
Read-only (reviewer, analyzer)	None extra
Write-capable (executor, fixer)	Write(*), Edit(*)
Agent-delegating (planner, executor)	Task(*)

---

Pattern 3: Task Lifecycle

All teammates follow the same task discovery and lifecycle pattern.

Standard Flow

// Step 1: Find my tasks
const tasks = TaskList()
const myTasks = tasks.filter(t =>
  t.subject.startsWith('<PREFIX>-') &&  // PLAN-*, IMPL-*, TEST-*, REVIEW-*
  t.owner === '<role-name>' &&
  t.status === 'pending' &&
  t.blockedBy.length === 0              // Not blocked
)

// Step 2: No tasks -> idle
if (myTasks.length === 0) return

// Step 3: Claim task (lowest ID first)
const task = TaskGet({ taskId: myTasks[0].id })
TaskUpdate({ taskId: task.id, status: 'in_progress' })

// Step 4: Execute work
// ... role-specific logic ...

// Step 5: Complete and loop
TaskUpdate({ taskId: task.id, status: 'completed' })

// Step 6: Check for next task
const nextTasks = TaskList().filter(t =>
  t.subject.startsWith('<PREFIX>-') &&
  t.owner === '<role-name>' &&
  t.status === 'pending' &&
  t.blockedBy.length === 0
)
if (nextTasks.length > 0) {
  // Continue with next task -> back to Step 3
}

Task Prefix Convention

Prefix	Role	Example
PLAN-	planner	PLAN-001: Explore and plan implementation
IMPL-	executor	IMPL-001: Implement approved plan
TEST-	tester	TEST-001: Test-fix cycle
REVIEW-	tester	REVIEW-001: Code review and requirement verification
<NEW>-	new role	Must be unique, uppercase, hyphen-suffixed

Task Chain (defined in coordinate.md)

PLAN-001 → IMPL-001 → TEST-001 + REVIEW-001
         ↑ blockedBy    ↑ blockedBy

---

Pattern 4: Five-Phase Execution Structure

Every team command follows a consistent 5-phase internal structure.

Standard Phases

Phase	Purpose	Common Actions
Phase 1: Task Discovery	Find and claim assigned tasks	TaskList, TaskGet, TaskUpdate
Phase 2: Context Loading	Load necessary context for work	Read plan/config, detect framework
Phase 3: Core Work	Execute primary responsibility	Role-specific logic
Phase 4: Validation/Summary	Verify work quality	Syntax check, criteria verification
Phase 5: Report + Loop	Report to coordinator, check next	SendMessage, TaskUpdate, TaskList

Phase Structure Template

### Phase N: <Phase Name>

\`\`\`javascript
// Implementation code
\`\`\`

---

Pattern 5: Complexity-Adaptive Routing

All roles that process varying-difficulty tasks should implement adaptive routing.

Decision Logic

function assessComplexity(description) {
  let score = 0
  if (/refactor|architect|restructure|module|system/.test(description)) score += 2
  if (/multiple|across|cross/.test(description)) score += 2
  if (/integrate|api|database/.test(description)) score += 1
  if (/security|performance/.test(description)) score += 1
  return score >= 4 ? 'High' : score >= 2 ? 'Medium' : 'Low'
}

Routing Table

Complexity	Direct Claude	CLI Agent	Sub-agent
Low	Direct execution	-	-
Medium	-	cli-explore-agent / cli-lite-planning-agent	-
High	-	CLI agent	code-developer / universal-executor

Sub-agent Delegation Pattern

Task({
  subagent_type: "<agent-type>",
  run_in_background: false,
  description: "<brief description>",
  prompt: `
## Task Objective
${taskDescription}

## Output Location
${sessionFolder}/${outputFile}

## MANDATORY FIRST STEPS
1. Read: .workflow/project-tech.json (if exists)
2. Read: .workflow/project-guidelines.json (if exists)

## Expected Output
${expectedFormat}
`
})

---

Pattern 6: Coordinator Spawn Integration

New teammates must be spawnable from coordinate.md using standard pattern.

Skill Path Format (Folder-Based)

Team commands use folder-based organization with colon-separated skill paths:

File location:  .claude/commands/team/{team-name}/{role-name}.md
Skill path:     team:{team-name}:{role-name}

Example:
  .claude/commands/team/spec/analyst.md  →  team:spec:analyst
  .claude/commands/team/security/scanner.md  →  team:security:scanner

Spawn Template

Task({
  subagent_type: "general-purpose",
  team_name: teamName,
  name: "<role-name>",
  prompt: `You are team "${teamName}" <ROLE>.

When you receive <PREFIX>-* tasks, call Skill(skill="team:${teamName}:<role-name>") to execute.

Current requirement: ${taskDescription}
Constraints: ${constraints}

## Message Bus (Required)
Before each SendMessage, call mcp__ccw-tools__team_msg:
mcp__ccw-tools__team_msg({ operation: "log", team: "${teamName}", from: "<role>", to: "coordinator", type: "<type>", summary: "<summary>" })

Workflow:
1. TaskList -> find <PREFIX>-* tasks assigned to you
2. Skill(skill="team:${teamName}:<role-name>") to execute
3. team_msg log + SendMessage results to coordinator
4. TaskUpdate completed -> check next task`
})

---

Pattern 7: Error Handling Table

Every command ends with a standardized error handling table.

Template

## Error Handling

| Scenario | Resolution |
|----------|------------|
| No tasks available | Idle, wait for coordinator assignment |
| Plan/Context file not found | Notify coordinator, request location |
| Sub-agent failure | Retry once, then fallback to direct execution |
| Max iterations exceeded | Report to coordinator, suggest intervention |
| Critical issue beyond scope | SendMessage fix_required to coordinator |

---

Pattern 8: Session File Structure

Roles that produce artifacts follow standard session directory patterns.

Convention

.workflow/.team-<purpose>/{identifier}-{YYYY-MM-DD}/
├── <work-product-files>
├── manifest.json (if multiple outputs)
└── .task/ (if generating task files)
    ├── TASK-001.json
    └── TASK-002.json

---

Section B: Collaboration Patterns

Complete specification: collaboration-patterns.md

Collaboration Pattern Quick Reference

Every collaboration pattern has these standard elements:

Element	Description
Entry Condition	When to activate this pattern
Workflow	Step-by-step execution flow
Convergence Criteria	How the pattern terminates successfully
Feedback Loop	How information flows back to enable correction
Timeout/Fallback	What happens when the pattern doesn't converge
Max Iterations	Hard limit on cycles (where applicable)

Pattern Selection Guide

Scenario	Recommended Pattern	Why
Standard feature development	CP-1: Linear Pipeline	Well-defined sequential stages
Code review with fixes needed	CP-2: Review-Fix Cycle	Iterative improvement until quality met
Multi-angle analysis needed	CP-3: Fan-out/Fan-in	Parallel exploration, aggregated results
Critical decision (architecture, security)	CP-4: Consensus Gate	Multiple perspectives before committing
Agent stuck / self-repair failed	CP-5: Escalation Chain	Progressive expertise levels
Large feature (many files)	CP-6: Incremental Delivery	Validated increments reduce risk
Blocking issue stalls pipeline	CP-7: Swarming	All resources on one problem
Domain-specific expertise needed	CP-8: Consulting	Expert advice without role change
Design + Implementation parallel	CP-9: Dual-Track	Faster delivery with sync checkpoints
Post-completion learning	CP-10: Post-Mortem	Capture insights for future improvement

---

Pattern Summary Checklist

When designing a new team command, verify:

Infrastructure Patterns

• YAML front matter with group: team
• Message bus section with team_msg logging
• CLI fallback section with ccw team CLI examples and parameter mapping
• Role-specific message types defined
• Task lifecycle: TaskList -> TaskGet -> TaskUpdate flow
• Unique task prefix (no collision with existing PLAN/IMPL/TEST/REVIEW, scan team/**/*.md)
• 5-phase execution structure
• Complexity-adaptive routing (if applicable)
• Coordinator spawn template integration
• Error handling table
• SendMessage communication to coordinator only
• Session file structure (if producing artifacts)

Collaboration Patterns

• At least one collaboration pattern selected
• Convergence criteria defined (max iterations / quality gate / timeout)
• Feedback loop implemented (how results flow back)
• Timeout/fallback behavior specified
• Pattern-specific message types registered
• Coordinator aware of pattern (can route messages accordingly)