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 2 of 12 for GPT-5 Codex
RankRepoStarsScoreExternal link
33strapi/strapiGitHub73.3k ★
90.9
open
34webpack/webpackGitHubBadge66.1k ★
90.9
open
35rollup/rollupGitHub26.3k ★
90.9
open
36prometheus/prometheusGitHub66.5k ★
90.1
open
37delta-io/deltaGitHub9k ★
90.1
open
38chakra-ui/chakra-uiGitHub40.7k ★
89.7
open
39gitlab-org/gitlab-runnerGitLab2.6k ★
89.6
open
40nodejs/nodeGitHub122.3k ★
89.3
open
41denoland/denoGitHub108.8k ★
89.3
open
42pytorch/pytorchGitHub104.7k ★
89.3
open
43oven-sh/bunGitHub96.2k ★
89.3
open
44ghostty-org/ghosttyGitHub62.1k ★
89.3
open
45BerriAI/litellmGitHub61.1k ★
89.3
open
46go-gitea/giteaGitHub58.5k ★
89.3
open
47forem/foremGitHub22.8k ★
89.3
open
48vitessio/vitessGitHub21.4k ★
89.3
open
49antiwork/gumroadGitHub9.8k ★
89.3
open
50n8n-io/n8nGitHub207.1k ★
88.7
open
51PostHog/posthogGitHub40.2k ★
88.7
open
52vercel/turborepoGitHub31.2k ★
88.7
open
53nautechsystems/nautilus_traderGitHub29.9k ★
88.7
open
54nuxt/nuxtGitHub60.9k ★
88.5
open
55gradio-app/gradioGitHub43.7k ★
88.5
open
56moby/mobyGitHub72.2k ★
88.1
open
57traefik/traefikGitHub65.2k ★
88.1
open
58aaif-goose/gooseGitHub55.2k ★
88.1
open
59psf/requestsGitHub54.6k ★
88.0
open
60psf/blackGitHub41.9k ★
88.0
open
61modelcontextprotocol/serversGitHub91.2k ★
87.7
open
62mastra-ai/mastraGitHub28.7k ★
87.7
open
63microsoft/playwrightGitHub97.6k ★
87.6
open
64OpenHands/OpenHandsGitHub90.8k ★
87.6
open

Tracking 371 repos · last updated