acaprino/team-composition-patterns

Team Composition Patterns

Best practices for composing multi-agent teams, selecting team sizes, choosing agent types, and configuring display modes for Claude Code's Agent Teams feature.

When to Use This Skill

• Deciding how many teammates to spawn for a task
• Choosing between preset team configurations
• Selecting the right agent type (subagent_type) for each role
• Configuring teammate display modes (tmux, iTerm2, in-process)
• Building custom team compositions for non-standard workflows

Team Sizing Heuristics

| Complexity | Team Size | When to Use | | ------------ | --------- | ----------------------------------------------------------- | | Simple | 1-2 | Single-dimension review, isolated bug, small feature | | Moderate | 2-3 | Multi-file changes, 2-3 concerns, medium features | | Complex | 3-4 | Cross-cutting concerns, large features, deep debugging | | Very Complex | 4-5 | Full-stack features, comprehensive reviews, systemic issues |

Rule of thumb: Start with the smallest team that covers all required dimensions. Adding teammates increases coordination overhead.

Token cost multiplier

A team costs 3-10x the tokens of a single Claude (typical ~7x for plan-mode workflows). Each teammate runs in its own context window and consumes tokens independently. Drivers of cost:

• Number of teammates (linear).
• Token budget per teammate (linear in exploration depth).
• Duration of unsupervised exploration (the largest variance source; unbounded scope explodes here).

Cheap-team recipe: Opus lead + Sonnet teammates, 2-3 teammates, scope-bounded spawn prompts, Haiku for any role where summarization is the main job. Cost killers: unbounded scope, no file ownership (forces rework), no task dependencies (forces rework on unstable foundations), no TaskCompleted quality gates (forces rework on broken code).

Hard limits (as of 2026-05)

These are enforced by the harness and cannot be worked around with prompt engineering:

• One team per lead. A lead can only manage one team at a time. Clean up before creating the next.
• No nested teams. Teammates cannot spawn their own teams or further teammates.
• No nested subagents. A teammate spawned with Agent cannot itself call Agent to spawn a sub-subagent.
• Lead is fixed for the team's lifetime. No promotion, no leadership transfer.
• Permissions set at spawn. Per-teammate at spawn time is not supported.
• No session resumption for in-process teammates. /resume and /rewind do not restore them.
• Broadcast removed. Send one message per recipient by name.

Reference: docs/references/agent-teams-best-practices.md § Hard limits.

Preset Team Compositions

Review Team

• Size: 3 reviewers
• Agents: prefer specialized senior-review:security-auditor + senior-review:code-auditor + a third dimension matching the diff (e.g. senior-review:ui-race-auditor for frontend changes, senior-review:distributed-flow-auditor for cross-service changes). Fall back to agent-teams:team-reviewer only when no specialized agent fits the dimension.
• Default dimensions: security, code quality (architecture + patterns + scoring), and one context-driven dimension
• Use when: Code changes need multi-dimensional quality assessment. For pipeline reviews driven by /team-review, the command auto-selects specialized agents based on the diff and adds Phase 1 context (deep-dive + interconnect map) automatically.

Debug Team

• Size: 3 investigators
• Agents: 3x team-debugger
• Default hypotheses: 3 competing hypotheses
• Use when: Bug has multiple plausible root causes

Feature Team

• Size: 3 (1 lead + 2 implementers)
• Agents: 1x team-lead + 2x team-implementer
• Use when: Feature can be decomposed into parallel work streams

Fullstack Team

• Size: 4 (1 lead + 3 implementers)
• Agents: 1x team-lead + 1x frontend team-implementer + 1x backend team-implementer + 1x test team-implementer
• Use when: Feature spans frontend, backend, and test layers

Research Team

• Size: 3 researchers
• Agents: 3x research:deep-researcher (for systematic multi-source investigation) or general-purpose fallback; use research:quick-searcher for single-fact lookups
• Default areas: Each assigned a different research question, module, or topic
• Capabilities: Codebase search (Grep, Glob, Read), web search (WebSearch, WebFetch)
• Use when: Need to understand a codebase, research libraries, compare approaches, or gather information from code and web sources in parallel

Security Team

• Size: 4 reviewers
• Agents: prefer senior-review:security-auditor for OWASP / auth / secrets, platform-engineering:platform-reviewer for client-side hardening (CSP, token storage, secrets in bundles), senior-review:distributed-flow-auditor for cross-service auth flows, and codebase-cleanup:deps-audit (or senior-review:cleanup-auditor) for dependencies / supply chain. Fall back to agent-teams:team-reviewer only if a dimension has no specialized agent.
• Default dimensions: OWASP / vulnerabilities, platform / client-side security, cross-service auth, dependencies / supply chain
• Use when: Comprehensive security audit covering multiple attack surfaces.

Migration Team

• Size: 4 (1 lead + 2 implementers + 1 reviewer)
• Agents: 1x team-lead + 2x team-implementer + 1x team-reviewer
• Use when: Large codebase migration (framework upgrade, language port, API version bump) requiring parallel work with correctness verification

Deep Search Team

• Size: 2-4 (depends on depth level)
• Agents: 2-3x research:deep-researcher + optional domain expert (auto-selected)
• Use when: Complex questions requiring systematic coverage across codebase, web, and domain expertise

Docs Team

• Size: 3 (explorer + writer + verifier)
• Agents: 1x codebase-mapper:codebase-explorer + 1x codebase-mapper:documentation-engineer + 1x senior-review:code-auditor
• Use when: Creating or overhauling project documentation from code analysis

App Analysis Team

• Size: 3 (mapper + researcher + designer)
• Agents: 1x app-analyzer:app-analyzer + 1x research:deep-researcher + 1x frontend:frontend-design
• Use when: Competitive app analysis, navigation mapping, design system extraction

Tauri Team

• Size: 4 (1 lead + 3 specialists)
• Agents: 1x team-lead + 1x tauri-development:rust-engineer + 1x frontend:frontend-engineer + 1x tauri-development:tauri-desktop
• Use when: Building or optimizing Tauri v2 desktop/mobile applications

UI Studio Team

• Size: 3+3 (design wave + polish wave, spawned sequentially)
• Design wave: 1x frontend:frontend-design (direction) + 1x frontend:frontend-layout (layout) + 1x frontend:frontend-design (UX)
• Polish wave: 1x frontend:frontend-design (polish) + 1x react-development:react-performance-optimizer (perf) + 1x senior-review:code-auditor (review)
• Use when: Building new UI from scratch or major redesigns

Agent Type Selection

When spawning teammates with the Agent tool, choose subagent_type based on what tools the teammate needs:

| Agent Type | Tools Available | Use For | | ------------------------------ | ----------------------------------------- | ---------------------------------------------------------- | | general-purpose | All tools (Read, Write, Edit, Bash, etc.) | Implementation, debugging, any task requiring file changes | | Explore | Read-only tools (Read, Grep, Glob) | Research, code exploration, analysis | | Plan | Read-only tools | Architecture planning, task decomposition | | agent-teams:team-reviewer | Read/Write/search/Bash plus TaskList/TaskGet/TaskUpdate/SendMessage | Code review with structured findings | | agent-teams:team-debugger | Read/Write/search/Bash plus TaskList/TaskGet/TaskUpdate/SendMessage | Hypothesis-driven investigation | | agent-teams:team-implementer | Read/Write/Edit/search/Bash plus team tools | Building features within file ownership boundaries | | agent-teams:team-lead | Read/search/Bash plus Agent Teams coordination tools (Agent, TeamCreate, TeamDelete, TaskCreate/List/Get/Update, SendMessage) | Team orchestration and coordination |

Key distinction: Read-only agents (Explore, Plan) cannot modify files. Never assign implementation tasks to read-only agents.

Display Mode Configuration

Configure in ~/.claude/settings.json:

{
  "teammateMode": "tmux"
}

| Mode | Behavior | Best For | | -------------- | ------------------------------ | ------------------------------------------------- | | "tmux" | Split panes (auto-detects tmux or iTerm2's it2 CLI) | Development workflows, monitoring multiple agents | | "in-process" | All teammates in main terminal, Shift+Down to cycle | Simple tasks, CI/CD environments, any terminal without tmux | | "auto" (default) | Split panes if already in tmux, otherwise in-process | Most users; no manual choice needed |

Note: "iterm2" is not a separate setting. Split-pane mode uses tmux first and falls back to iTerm2's it2 CLI automatically. VS Code's integrated terminal, Windows Terminal, and Ghostty do not support split panes -- they always use in-process mode.

Custom Team Guidelines

When building custom teams:

1. Every team needs a coordinator -- Either designate a team-lead or have the user coordinate directly
2. Match roles to agent types -- Use specialized agents (reviewer, debugger, implementer) when available
3. Avoid duplicate roles -- Two agents doing the same thing wastes resources
4. Define boundaries upfront -- Each teammate needs clear ownership of files or responsibilities
5. Keep it small -- 2-4 teammates is the sweet spot; 5+ requires significant coordination overhead

Troubleshooting

A teammate was spawned as Explore but needs to write files. Explore and Plan are read-only agents. Change the subagent_type to general-purpose or an appropriate specialized agent type. Never assign implementation tasks to read-only agents.

The team is growing too large and coordination is slowing everything down. Each additional teammate adds communication overhead. Consolidate roles: can one agent cover two dimensions? A 4-person team doing 6 independent tasks is usually better served by 3 agents covering 2 tasks each.

tmux mode is not showing panes. Ensure tmux is installed and a session is already running before spawning teammates. The in-process mode works without tmux and is suitable for CI or scripted environments.

Two reviewers are flagging the same issues. The review dimensions overlap. Redefine each reviewer's focus area: one on correctness/logic, one on security, one on performance/scalability. Overlapping coverage wastes tokens and produces duplicate findings.

A team-lead is spawning teammates but they are not receiving tasks. Verify that the lead is using the Agent tool to spawn teammates and passing complete context in the prompt. Teammates start fresh with no prior conversation history -- they need all relevant information in their initial prompt.

Related Skills

• parallel-feature-development -- Decompose work streams and assign file ownership once the team is composed
• team-communication-protocols -- Establish messaging norms and shutdown procedures for the assembled team