anc.dev The agent-native CLI standard

bun

Incredibly fast JavaScript runtime, bundler, test runner, and package manager

workhorse Zig oven-sh/bun
60% pass rate
2/7 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

Audience signal: mixed

This tool sends mixed signals: some agent-readable affordances are present, others are not. Treat the warnings below as friction points, not defects.

This is an informational signal, not an authoritative verdict — see methodology. The per-check evidence below is the ground truth.

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

WARN Structured output support --output/--format flag detected but could not validate JSON via safe probes (--help/--version override output flags in most CLIs)

P3: Progressive Help Discovery

PASS Help flag produces useful output
PASS Version flag works

P4: Fail-Fast, Actionable Errors

FAIL Rejects invalid arguments binary silently accepted invalid flag (exit 0)

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

WARN Quiet mode available no --quiet/-q flag detected in --help output

Details

Version scored
1.3.13
Audit date
2026-05-01 10:09:14 UTC
Duration
298ms
Platform
linux/x86_64
Mode
command
Anc build
0.3.0
Install
brew install bun

Embed the badge

The badge floor is 80%; this scorecard is at 60% (20 points below). Once the score clears the floor, the embed snippet will appear here. The top issues above are the place to start.

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

anc check --command bun --output json

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