(日本語READMEはこちら)

ABOUT

A CLI tool written in Haskell for checking your recent AtCoder AC count and the problems you solved, from the command line.

Inspired by ccusage.

It uses the AtCoder Problems API to fetch the AC history.

HOW TO USE

npx acac-cli <atcoder-username>
┌──────────────────┬────┬───────────────────────────────────────────────────┐
│ Date             │ AC │ Problems                                          │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ 2026-05-26 (Tue) │ 2  │ abc081B abc290A                                   │
│ 2026-05-29 (Fri) │ 1  │ abc342C                                           │
│ 2026-05-30 (Sat) │ 6  │ abc460A abc460B abc460C abc460D awc0001A awc0001B │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ week total       │ 9  │                                                   │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ 2026-05-31 (Sun) │ 1  │ abc460C                                           │
│ 2026-06-01 (Mon) │ 1  │ abc460D                                           │
│ 2026-06-06 (Sat) │ 3  │ abc461A abc461B abc461C                           │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ week total       │ 5  │                                                   │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ 2026-06-07 (Sun) │ 1  │ abc461C                                           │
│ 2026-06-08 (Mon) │ 1  │ abc144B                                           │
│ 2026-06-09 (Tue) │ 5  │ abc106B abc120B abc122B abc136B abc150B           │
│ 2026-06-10 (Wed) │ 1  │ abc057C                                           │
│ 2026-06-11 (Thu) │ 1  │ abc095A                                           │
│ 2026-06-12 (Fri) │ 1  │ sumitrust2019D                                    │
│ 2026-06-13 (Sat) │ 3  │ abc462A abc462B abc462C                           │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ week total       │ 13 │                                                   │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ 2026-06-15 (Mon) │ 5  │ APG4bA APG4bPythonA abc128C abc462B abc462D       │
│ 2026-06-17 (Wed) │ 3  │ abc145C abc147C abc150C                           │
│ 2026-06-18 (Thu) │ 2  │ abc054C abc448B                                   │
│ 2026-06-19 (Fri) │ 5  │ abc054C abc245B abc273A abc425B awc0001B          │
│ 2026-06-20 (Sat) │ 6  │ abc029C abc153D abc247C abc463A abc463B abc463C   │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ week total       │ 21 │                                                   │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ 2026-06-22 (Mon) │ 2  │ abc292B abc350B                                   │
├──────────────────┼────┼───────────────────────────────────────────────────┤
│ week total       │ 2  │                                                   │
└──────────────────┴────┴───────────────────────────────────────────────────┘

It displays your recent AC history as a weekly table.

supported

The following binaries are built.

| OS | binary type | Verified on real device | | ------- | ------------ | ----------------------- | | Linux | linux-x64 | ✅ | | Linux | linux-arm64 | | | macOS | darwin-arm64 | ✅ | | macOS | darwin-x64 | | | Windows | win32-x64 | ✅ |

If you have verified acac on a real device other than the ✅ ones, please let us know via an Issue.

If you use another environment, we would appreciate a request/PR on an Issue, but you can also set it up by referring to For Developer Memo.

Supply chain / build transparency

For supply chain transparency, the distributed artifacts are produced as follows.

• All binaries are built on GitHub Actions from the acac-cli source. Nothing is published from a local machine.
  • Linux (linux-x64 / linux-arm64) is a reproducible musl static build via Nix (nix build .#static).
  • macOS / Windows are built on each OS's native runner with GHC 9.12.2 + cabal.
• Publishing to npm is done by CI with provenance (--provenance, OIDC trusted publishing). Each release can be verified back to the workflow run and commit it came from.
• Releases are cut from v*.*.* tags using GitHub Immutable Releases (the release is created by the CI bot, not by hand).
• Each GitHub Release binary is signed with cosign (keyless) — every acac-<os>-<arch> ships an accompanying .sig (signature) and .pem (certificate), plus a acac.intoto.jsonl SLSA provenance attestation for the release. This is what OpenSSF Scorecard's Signed-Releases checks (Immutable Releases and npm provenance alone do not satisfy it).
• Platform binaries are distributed as acac-<os>-<arch> optionalDependency packages, so the main package has no runtime dependencies.