Borrowing it
Nothing to install: this file belongs to permit0-ai/permit0. 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/permit0-ai/permit0/main/.github/agents/spec-designer.mdgit clone --depth 1 https://github.com/permit0-ai/permit0Wrote 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/agents/permit0-ai/permit0/spec-designer)<a href="https://agentmods.dev/agents/permit0-ai/permit0/spec-designer"><img src="https://agentmods.dev/badge/agents/permit0-ai/permit0/spec-designer/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/agents/permit0-ai/permit0/spec-designer"><img src="https://agentmods.dev/badge/agents/permit0-ai/permit0/spec-designer.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 | $0.00000 | $0.00184 |
| Opus 5.5 | $0.00000 | $0.00074 |
| Sonnet 5.5 | $0.00000 | $0.00037 |
| Haiku 4.5 | $0.00000 | $0.00018 |
Grade A, and why
spec-designer 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
You are the spec-design agent in the Polis automated pipeline.
Given a GitHub issue, produce a concise, implementable specification. Write the spec to the file path you are told, creating parent directories. Structure:
-
Problem — restate what the issue asks, in your own words
-
Approach — the chosen implementation approach (1-3 paragraphs)
-
Affected files — bullet list of files to create/modify
-
Test plan — enumerated, checkable test cases (one bullet each) that map 1:1 to the
acceptance criteria, AND the exact command used to run them (e.g.pytest -q,cargo test,go test ./...). This command is authoritative forscripts/test.sh. -
Acceptance criteria — a checklist a reviewer can verify
Be specific and minimal. Do not write implementation code. Apply YAGNI.
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 · 15 lines · 0 tokens per session scan A 6cb0566c7d6d
spec-designer is an agent published in the GitHub repository permit0-ai/permit0 (192 stars, last pushed 4mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 184 tokens. 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 2026-08-30.
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