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 4 of 12 for GPT-5 Codex
RankRepoStarsScoreExternal link
97apache/flinkGitHub26.4k ★
83.3
open
98microsoft/onnxruntimeGitHub22.1k ★
83.3
open
99TanStack/routerGitHub15.2k ★
83.3
open
100data-privacy-stack/presidioGitHub11.3k ★
83.3
open
101inngest/inngestGitHub5.9k ★
83.3
open
102mastodon/mastodonGitHub50.4k ★
82.7
open
103warpdotdev/warpGitHub65.4k ★
82.5
open
104apache/kafkaGitHub33.9k ★
82.5
open
105apache/pulsarGitHub15.3k ★
82.5
open
106langflow-ai/langflowGitHub155.6k ★
82.1
open
107crewAIInc/crewAIGitHub59.6k ★
82.1
open
108apache/sparkGitHub44.2k ★
82.1
open
109ray-project/rayGitHub44k ★
82.1
open
110chroma-core/chromaGitHub29.5k ★
82.1
open
111biomejs/biomeGitHub25.9k ★
82.1
open
112risingwavelabs/risingwaveGitHub9.4k ★
82.1
open
113fastlane/fastlaneGitHub42.2k ★
82.0
open
114nushell/nushellGitHub40.7k ★
82.0
open
115directus/directusGitHub38.4k ★
82.0
open
116charmbracelet/crushGitHub28.6k ★
82.0
open
117Textualize/textualGitHub37.4k ★
81.9
open
118google-gemini/gemini-cliGitHub107.3k ★
81.5
open
119cloudflare/vinextGitHub9.1k ★
81.3
open
120ocaml/duneGitHub1.9k ★
81.3
open
121yugabyte/yugabyte-dbGitHub10.6k ★
80.8
open
122h4ckf0r0day/obscuraGitHub28.8k ★
80.7
open
123pytest-dev/pytestGitHub14.6k ★
80.7
open
124privy-io/go-sdkGitHub4 ★
80.7
open
125cline/clineGitHub70.2k ★
80.4
open
126tldraw/tldrawGitHub50.9k ★
80.4
open
127electric-sql/electricGitHub10.4k ★
80.4
open
128appwrite/appwriteGitHub57.7k ★
80.0
open

Tracking 371 repos · last updated