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 commands/chankov/agent-fleet/af-design-agentgit clone --depth 1 https://github.com/chankov/agent-fleetWrote 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/commands/chankov/agent-fleet/af-design-agent)<a href="https://agentmods.dev/commands/chankov/agent-fleet/af-design-agent"><img src="https://agentmods.dev/badge/commands/chankov/agent-fleet/af-design-agent.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 | $0.00014 | $0.00193 |
| Opus 5 | $0.00007 | $0.00097 |
| Sonnet 5 | $0.00003 | $0.00039 |
| Haiku 4.5 | $0.00001 | $0.00019 |
Grade A, and why
af-design-agent 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 4d 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
Invoke the designing-agents skill via the skill tool.
Begin by understanding what the user wants to author:
- Is this a persona (a role or lens the agent adopts), a skill (a repeatable workflow with gated steps and verification), or a pi harness (a TypeScript pi extension that reshapes the session)?
- What is the one-sentence purpose and when should it be invoked?
- What framework or steps should it follow?
- What are the explicit non-goals and scope limits?
- What output shape should a typical invocation produce?
Then scan the target location — agents/, skills/, or .pi/harnesses/ — for overlap. Draft the artifact using the matching template, verify the draft against prompting guidance when available, and confirm with the user before writing the file(s).
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.
- 4d ago First seen · 16 lines · 14 tokens per session scan A 7e35dcf5149a
af-design-agent is a command published in the GitHub repository chankov/agent-fleet (13 stars, last pushed today), licensed MIT. It adds 14 tokens to every session and 193 once invoked, about $0.0001 per session on Opus 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.
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