Borrowing it
Nothing to install: this file belongs to 2389-research/building-multiagent-systems. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/2389-research/building-multiagent-systems/main/CLAUDE.mdgit clone --depth 1 https://github.com/2389-research/building-multiagent-systemsWrote 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/instructions/2389-research/building-multiagent-systems/claude-md)<a href="https://agentmods.dev/instructions/2389-research/building-multiagent-systems/claude-md"><img src="https://agentmods.dev/badge/instructions/2389-research/building-multiagent-systems/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/2389-research/building-multiagent-systems/claude-md"><img src="https://agentmods.dev/badge/instructions/2389-research/building-multiagent-systems/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00903 | $0.00903 |
| Opus 5.5 | $0.00361 | $0.00361 |
| Sonnet 5.5 | $0.00181 | $0.00181 |
| Haiku 4.5 | $0.00090 | $0.00090 |
Grade A, and why
building-multiagent-systems CLAUDE.md scanned grade A with 0 findings 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 5d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Building Multi-Agent Systems Plugin
Overview
This plugin provides comprehensive architecture patterns for multi-agent systems where AI agents coordinate to accomplish complex tasks using tools. Language-agnostic and applicable across TypeScript, Python, Go, Rust, and other environments.
Skill Included
building-multiagent-systems
Trigger keywords: multi-agent, orchestrator, coordination, sub-agents, delegation, parallel work, sequential pipeline, fan-out, map-reduce
When to use:
- Designing systems where multiple AI agents coordinate
- Implementing orchestrators that spawn sub-agents
- Building systems with parallel or sequential agent workflows
- Coordinating shared resources across agents
- Managing agent lifecycle and state
What it does:
- Asks six discovery questions about requirements and constraints
- Presents foundational patterns (event-sourcing, hierarchical IDs, state machines)
- Recommends coordination pattern (fan-out/fan-in, pipeline, delegation, queue, map-reduce, peer collaboration, MAKER)
- Guides tool coordination design (permissions, locking, rate limiting, caching)
- Enforces cascading cleanup to prevent orphaned agents
- Provides production-ready implementation examples
Patterns
Seven Coordination Patterns
- Fan-Out/Fan-In - Parallel independent work with batching
- Sequential Pipeline - Multi-stage transformations with checkpointing
- Recursive Delegation - Hierarchical task breakdown with depth limits
- Work-Stealing Queue - Large batches with load balancing
- Map-Reduce - Cost optimization with cheap map, smart reduce
- Peer Collaboration - LLM council for bias reduction
- MAKER - Zero-error tasks via extreme decomposition, microagents, and multi-agent voting
Foundational Patterns
- Event-Sourcing - All state changes as events for audit trails and replay
- Hierarchical IDs - Encode delegation hierarchy (e.g.,
session.1.2) - Agent State Machines - Explicit states with invalid transition errors
- Communication Mechanisms - EventEmitter, Channels, Async/Await
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.
- 5d ago Changed · +1 lines · +25 tokens per session 41e252f3200a
- 2mo ago First seen · 112 lines · 878 tokens per session scan A 9a588179b683
building-multiagent-systems CLAUDE.md is an instructions file published in the GitHub repository 2389-research/building-multiagent-systems (8 stars, last pushed 5d ago), licensed MIT. It adds 903 tokens to every session, about $0.0036 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
building-multiagent-systems CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| building-multiagent-systems CLAUDE.md2389-research/building-multiagent-systems | Instructions file | 8 | 5d ago | MIT | A | 903 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
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| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |