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 rules/wyattowalsh/agents/justfilegit clone --depth 1 https://github.com/wyattowalsh/agentsWhat 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 | $0.00008 | $0.00230 |
| Opus 5 | $0.00004 | $0.00115 |
| Sonnet 5 | $0.00002 | $0.00046 |
| Haiku 4.5 | $0.00001 | $0.00023 |
Grade A, and why
justfile 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 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.
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
Justfile path rule
When creating, editing, migrating, checking, or discovering Just recipes / justfiles, use /justfile.
- Own: new justfiles, recipe/module edits, Makefile→just or npm→just migration, house-style lint/check, recipe discovery (
just --list/--show/--dump). - Hygiene-only (naming, layout notes, thin shell/Makefile pointers without Just authoring):
shell-conventions. - Do not use
shell-scripterfor Just authoring; that skill owns shell scripts and Make file-timestamp builds, not justfiles.
Inspect just --version before relying on mid-2026 attributes. Prefer /justfile over ad-hoc Just edits when this path rule fires.
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 First seen · 22 lines · 230 tokens per session scan A 531056d59b98
justfile is a cursor rule published in the GitHub repository wyattowalsh/agents (5 stars, last pushed 11d ago), licensed MIT. It adds 8 tokens to every session and 230 once invoked, about $0.0000 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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