Borrowing it
Nothing to install: this file belongs to nublson/purl. 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/nublson/purl/develop/AGENTS.mdgit clone --depth 1 https://github.com/nublson/purlWrote 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/nublson/purl/agents-md)<a href="https://agentmods.dev/instructions/nublson/purl/agents-md"><img src="https://agentmods.dev/badge/instructions/nublson/purl/agents-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/nublson/purl/agents-md"><img src="https://agentmods.dev/badge/instructions/nublson/purl/agents-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 | $0.01926 | $0.01926 |
| Opus 5.5 | $0.00770 | $0.00770 |
| Sonnet 5.5 | $0.00385 | $0.00385 |
| Haiku 4.5 | $0.00193 | $0.00193 |
Grade A, and why
purl AGENTS.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Widespread `SCRAPE_FAILED` on every URL in local dev often means `SAFE_OUTBOUND_HTTP_PROXY` is set but unreachable or returns HTTP 407; unset it for direct egress or verify the proxy with `curl -x "$SAFE_OUTBOUND_HTTP_ The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 2d ago Changed db07573bb292
- 1mo ago Changed · +10 lines · +154 tokens per session e457308314f5
- 1mo ago Changed · +1 tokens per session d04097964246
- 1mo ago Changed · -6 lines · -387 tokens per session 247862e921ed
- 2mo ago First seen · 89 lines · 2,158 tokens per session scan A 33fed7c69153
purl AGENTS.md is an instructions file published in the GitHub repository nublson/purl (3 stars, last pushed yesterday), with no licence file. It adds 1,926 tokens to every session, about $0.0077 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
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