justfiles

justfiles is a cursor rule for Cursor from iloveitaly/llm-ide-rules. It costs 0 tokens per session (258 once invoked), scanned A, original, MIT.

Rules for writing Justfiles, which define repeatable commands for a project's development tasks.

In plain words
What is it for?
They help run Just tasks using the expected executable and stop clearly when Just is unavailable.
Why use it?
They avoid hiding problems with the Just command runner or changing the system path unnecessarily.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit They help run Just tasks using the expected executable and stop clearly when Just is unavailable.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/iloveitaly/llm-ide-rules/justfiles
Install

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.

Clone the repo
git clone --depth 1 https://github.com/iloveitaly/llm-ide-rules

Made for: Cursor.

Wrote 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.

agentmods badge for justfiles

README.md
[![agentmods](https://agentmods.dev/badge/rules/iloveitaly/llm-ide-rules/justfiles/github.svg)](https://agentmods.dev/rules/iloveitaly/llm-ide-rules/justfiles)
Your own site
<a href="https://agentmods.dev/rules/iloveitaly/llm-ide-rules/justfiles"><img src="https://agentmods.dev/badge/rules/iloveitaly/llm-ide-rules/justfiles/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.

agentmods 80×15 button for justfiles

Your own site · 80×15
<a href="https://agentmods.dev/rules/iloveitaly/llm-ide-rules/justfiles"><img src="https://agentmods.dev/badge/rules/iloveitaly/llm-ide-rules/justfiles.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 258 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00258
Opus 5.5 $0.00000 $0.00103
Sonnet 5.5 $0.00000 $0.00052
Haiku 4.5 $0.00000 $0.00026

Measured 15d ago against content hash f3beba234434, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

justfiles 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 15d 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.

.cursor/rules/justfiles.mdc · 26 lines

What it actually says

Justfiles

  • Docs: https://raw.githubusercontent.com/casey/just/master/README.md
  • Never use just_executable() to reference the executable for just. If just DNE, then something is wrong adn you should stop your work and let me know.
  • You should not have to mutate $PATH. If you cannot find an expected binary, stop your work and let me know.
  • Do not create aliases unless explicitly asked
  • Separate scripts larger than 5 lines with newlines and comments for non-obvious logic
  • Do not use inline shebang unless it differs from the default
  • Use _ convention, not [private]
  • Use uppercase for shell variable

Use the following script execution configuration:

# zsh is the default shell under macos, let's mirror it everywhere
set shell := ["zsh", "-ceuB", "-o", "pipefail", "-o", "extended_glob"]

# determines what shell to use for [script]
set script-interpreter := ["zsh", "-euB", "-o", "pipefail", "-o", "extended_glob"]
Changes

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.

  1. 15d ago Changed · +1 lines f3beba234434
  2. 16d ago Changed · +1 lines c6c238bf11b9
  3. 27d ago Changed · +1 lines 0d0f6f1e1133
  4. 1mo ago Changed · -2 lines d53969227d12
  5. 1mo ago Changed · +1 lines 396551cb63eb
  6. 1mo ago Changed · +13 lines a6d4e3dd245c
  7. 2mo ago First seen · 11 lines · 0 tokens per session scan A 84e170a7b75c

Subscribe to this mod's changes

justfiles is a cursor rule published in the GitHub repository iloveitaly/llm-ide-rules (13 stars, last pushed 4d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 258 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.