Agent Friendly Code

Which public repos are easiest for GPT-5 Codex to work in?

Repos from GitHub, GitLab, and Bitbucket, ranked by their GPT-5 Codex score rather than the average across every agent. gitlab-org/cli leads with 97.7.

The methodology lists the weight GPT-5 Codex gives each check and the documentation it comes from.

GPT-5 Codex — Reads AGENTS.md before doing any work per OpenAI's Codex docs. Hierarchical (per-directory) AGENTS.md and AGENTS.override.md are first-class.
Leaderboard — page 10 of 12 for GPT-5 Codex
RankRepoStarsScoreExternal link
289openai/whisperGitHub110.4k ★
63.3
open
290dotnet/aspnetcoreGitHub38.5k ★
63.3
open
291jellyfin/jellyfinGitHub58k ★
63.2
open
292vitejs/viteGitHub83.3k ★
63.1
open
293lysine-dev/okhttpGitHub47.1k ★
62.7
open
294facebookresearch/faissGitHub41.1k ★
62.7
open
295composer/composerGitHub29.6k ★
62.7
open
296mkdocs/mkdocsGitHub22.5k ★
62.7
open
297redpanda-data/redpandaGitHub12.6k ★
62.7
open
298laravel/aiGitHub1.2k ★
62.7
open
299tokio-rs/axumGitHub27.5k ★
62.1
open
300stretchr/testifyGitHub26.2k ★
62.1
open
301microsoft/TypeScriptGitHub111.4k ★
62.0
open
302crystal-lang/crystalGitHub20.5k ★
62.0
open
303dotnet/runtimeGitHub18.3k ★
62.0
open
304apache/hudiGitHub6.3k ★
62.0
open
305tokio-rs/tokioGitHub33.4k ★
60.8
open
306timescale/timescaledbGitHub23.7k ★
60.7
open
307ruby/rubyGitHub23.8k ★
60.0
open
308lysine-dev/retrofitGitHub44k ★
59.9
open
309graphviz/graphvizGitLab1.5k ★
59.7
open
310gleam-lang/gleamGitHub22k ★
59.3
open
311curl/curlGitHub43.2k ★
59.2
open
312AUTOMATIC1111/stable-diffusion-webuiGitHub165k ★
58.7
open
313langchain-ai/langchainGitHub147.7k ★
58.7
open
314obsproject/obs-studioGitHub77.4k ★
58.7
open
315dart-lang/sdkGitHub11.3k ★
58.7
open
316elixir-ecto/ectoGitHub6.5k ★
58.7
open
317serverpod/serverpodGitHub3.3k ★
58.7
open
318ash-project/ashGitHub2.5k ★
58.7
open
319wireshark/wiresharkGitLab1.6k ★
58.7
open
320flutter/aiGitHub291 ★
58.7
open

Tracking 371 repos · last updated