Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/zircote-plugins/claude-team-orchestration/spawn-backendsnpx skills add zircote-plugins/claude-team-orchestration --skill spawn-backendsgit clone --depth 1 https://github.com/zircote-plugins/claude-team-orchestrationWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/zircote-plugins/claude-team-orchestration/spawn-backends)<a href="https://agentmods.dev/skills/zircote-plugins/claude-team-orchestration/spawn-backends"><img src="https://agentmods.dev/badge/skills/zircote-plugins/claude-team-orchestration/spawn-backends.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00044 | $0.02307 |
| Opus 5 | $0.00022 | $0.01154 |
| Sonnet 5 | $0.00009 | $0.00461 |
| Haiku 4.5 | $0.00004 | $0.00231 |
Grade B, and why
spawn-backends scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
cat ~/.claude/teams/{team}/config.json | jq '.members[].backendType' How it starts
The opening of the file, as written. The whole thing — 324 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spawn Backends
A backend determines how teammate Claude instances actually run. Claude Code supports three backends and auto-detects the best one based on your environment.
Experimental: Agent teams are disabled by default. Enable with
CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMSin your settings or environment.
Related skills:
- Orchestrating - Primitives overview and quick reference
- Team Management - Creating and managing teams
- Error Handling - Troubleshooting backend issues
Backend Comparison
| Backend | How It Works | Visibility | Persistence | Speed |
|---|---|---|---|---|
| in-process | Same Node.js process as leader | Hidden (background) | Dies with leader | Fastest |
| tmux | Separate terminal in tmux session | Visible in tmux | Survives leader exit | Medium |
| iterm2 | Split panes in iTerm2 window | Visible side-by-side | Dies with window | Medium |
teammateMode Setting
The default is "auto", which uses split panes if you're already running inside a tmux session, and in-process otherwise.
Settings File Configuration
Set teammateMode in your settings.json:
{
"teammateMode": "in-process"
}
Valid values: "auto", "in-process", "tmux"
CLI Flag
Force a mode for a single session:
claude --teammate-mode in-process
Environment Variable
export CLAUDE_CODE_SPAWN_BACKEND=in-process
Auto-Detection Logic
Claude Code automatically selects a backend using this decision tree:
flowchart TD
A[Start] --> B{Running inside tmux?}
B -->|Yes| C[Use tmux backend]
B -->|No| D{Running in iTerm2?}
D -->|No| E{tmux available?}
E -->|Yes| F[Use tmux - external session]
E -->|No| G[Use in-process]
D -->|Yes| H{it2 CLI installed?}
H -->|Yes| I[Use iterm2 backend]
H -->|No| J{tmux available?}
J -->|Yes| K[Use tmux - prompt to install it2]
J -->|No| L[Error: Install tmux or it2]
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 324 lines · 44 tokens per session scan B 82bf301171d0
spawn-backends is a skill published in the GitHub repository zircote-plugins/claude-team-orchestration (14 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 2,307 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
multi-agent
Multi-Agent Orchestration - 蚁群仿生设计，定义Agent角色、生命周期、信息素通信、任务分解、冲突解决。当需要多Agent并行协作时路由到此。.
harden
Improve interface resilience through better error handling, i18n support, text overflow handling, and edge case management. Makes interfaces robust and production-ready. Use when the user asks to harden, make production-ready, handle edge cases, add error states, or fix overflow and i18n issues.
overdrive
Pushes interfaces past conventional limits with technically ambitious implementations — shaders, spring physics, scroll-driven reveals, 60fps animations. Use when the user wants to wow, impress, go all-out, or make something that feels extraordinary.
verify-change
变更校验关卡。分析代码变更，检测文档同步状态，评估变更影响范围。当用户提到变更检查、文档同步、代码审查、提交前检查、diff分析时使用。在设计级变更、重构完成时自动触发。.
verify-security
安全校验关卡。自动扫描代码安全漏洞，检测危险模式，确保安全决策有文档记录。当用户提到安全扫描、漏洞检测、安全审计、代码安全、OWASP、注入检测、敏感信息泄露时使用。在新建模块、安全相关变更、攻防任务、重构完成时自动触发。.
liquid-glass
Apple Liquid Glass design system. Use when building UI with translucent, depth-aware glass morphism following Apple's design language. Provides CSS tokens, component patterns, dark/light mode, and animation specs.