just

A command runner for project-specific tasks

workhorse Rust casey/just
89% pass rate
5/7 principles met

Spec Coverage

How many of the spec's requirements were verified for this tool. See /coverage for the full matrix.

Level Total Verified Unverified
MUST 23 9 14
SHOULD 16 0 16
MAY 7 0 7

Top Issues

All Checks

P1: Non-Interactive by Default

PASS Non-interactive by default
SKIP Non-interactive gate flag advertised in --help target satisfies P1 via alternative gate (help-on-bare or stdin-primary)
PASS Flags advertise env-var bindings in --help

P2: Structured, Parseable Output

SKIP Structured output support no --output/--format flag detected in any subcommand

P3: Progressive Help Discovery

PASS Help flag produces useful output
PASS Version flag works

P4: Fail-Fast, Actionable Errors

PASS Rejects invalid arguments

P6: Composable, Predictable Command Structure

PASS Handles SIGPIPE gracefully
WARN Pager-using CLI ships --no-pager escape hatch pager referenced in --help but no --no-pager escape hatch advertised
PASS Respects NO_COLOR

P7: Bounded, High-Signal Responses

PASS Quiet mode available

Details

Version scored
1.50.0
Audit date
2026-05-01 10:09:12 UTC
Duration
288ms
Platform
linux/x86_64
Mode
command
Anc build
0.3.0
Install
brew install just

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[![agent-native](https://anc.dev/badge/just.svg)](https://anc.dev/score/just)

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Reproduce this scorecard for just locally and inspect the failing checks:

anc check --command just --output json

Install anc first if you don't have it. Add --output json to get the same JSON shape committed under scorecards/.