Borrowing it
Nothing to install: this file belongs to Utopia-V/mixagents. 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/Utopia-V/mixagents/main/.agents/skills/design-agent-systems/SKILL.mdgit clone --depth 1 https://github.com/Utopia-V/mixagentsWrote 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/utopia-v/mixagents/design-agent-systems)<a href="https://agentmods.dev/skills/utopia-v/mixagents/design-agent-systems"><img src="https://agentmods.dev/badge/skills/utopia-v/mixagents/design-agent-systems/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/skills/utopia-v/mixagents/design-agent-systems"><img src="https://agentmods.dev/badge/skills/utopia-v/mixagents/design-agent-systems.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00046 | $0.00209 |
| Opus 5.5 | $0.00018 | $0.00084 |
| Sonnet 5.5 | $0.00009 | $0.00042 |
| Haiku 4.5 | $0.00005 | $0.00021 |
Grade A, and why
design-agent-systems 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 2mo 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.
What it actually says
Design Agent Systems
当产品确实依赖模型形成判断或动作时，区分三个行为 owner：Model 形成候选判断与动作；Harness 构造观察、调用工具并维护运行状态；Environment 拥有事实、副作用与成功条件。
把状态、权限、恢复和验证放在实际拥有其语义的层。Prompt 不能成为环境事实的 owner，工具 schema 不能自行授予信任，summary 与索引不能替代长期权威，局部 eval 也不能替代产品父结果。
Broker 的 context、长期状态、工具、MCP、权限或持久副作用设计需要具体检查时，读取 context-and-tools.md。
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.
- 2mo ago First seen · 14 lines · 46 tokens per session scan A 9146dd82c525
design-agent-systems is a skill published in the GitHub repository Utopia-V/mixagents (217 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 209 once invoked, about $0.0002 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 2026-09-05.
design-agent-systems compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| design-agent-systemsUtopia-V/mixagents | Skill | 217 | 1mo ago | MIT | A | 46 | Codex |
| shortfilm-promptjnMetaCode/agency-orchestrator | Skill | 2.4k | 3d ago | Apache-2.0 | A | 66 | Claude Code, Codex |
| ao-workflow-runnerjnMetaCode/agency-orchestrator | Skill | 2.4k | 3d ago | Apache-2.0 | A | 34 | Claude Code, Codex |
| subagent-driven-developmentmateaix/mateclaw | Skill | 1.2k | yesterday | Apache-2.0 | A | 17 | Claude Code, Codex |
| setup-dsh-bridgeHazenSun/dsh-codex-bridge | Skill | 1 | 28d ago | Apache-2.0 | A | 70 | Codex |
| delegate-to-dshHazenSun/dsh-codex-bridge | Skill | 1 | 28d ago | Apache-2.0 | A | 76 | Claude Code, Codex |
| Subagent Driven Developmentankur-gaurav161418/omniforge | Skill | 0 | 14d ago | MIT | A | 22 | Claude Code, Codex |