RuleStackAI Coding RulesDiff two files

687 repositories carry `AGENTS.md`. The median one runs 767 words.

That is 62.6% of the repositories RuleStack indexes. RuleStack reports the share of indexed repositories carrying each format. One Cursor setup with thirty .mdc files counts as one adopting repository, not thirty.

2,354 files in the 16 October 2026 count48.4% write down a command37.5% carry a code block5,833 stars on the median repository

AssertedWhat the documentation says this file can expressRead 2 August 2026

FileAGENTS.md

OwnerNo vendor, open standard

Tools that read it23 tools

Glob targetingNo

ImportsNo

FrontmatterNo

Nested filesYes

User scopeNo

Always in scope; in a monorepo the nearest AGENTS.md to the edited file wins.

OpenAI Codex

Cursor

Amp

Aider

Zed

Google Jules

Gemini CLI

Factory

RooCode

opencode

Devin

Warp

goose

VS Code

GitHub Copilot coding agent

Windsurf

Junie (JetBrains)

Kilo Code

Augment Code

UiPath Autopilot

Semgrep

Phoenix

Ona

MeasuredWhat the repositories wrote622 root files, counted 16 October 2026

Code style71.1% of 622

Agent behaviour62.1% of 622

Tests58.2% of 622

Hard prohibitions56.8% of 622

Git, commits & PRs55.5% of 622

Architecture44.4% of 622

Lint & format41.6% of 622

Build39.2% of 622

Setup & install31.5% of 622

Documentation30.5% of 622

Security23.5% of 622

Testing strategy23.2% of 622

Types17.8% of 622

APIs & contracts16.7% of 622

Deploy & release15.1% of 622

Dependencies13.2% of 622

UI & components13.0% of 622

Performance9.8% of 622

Database & migrations8.7% of 622

Monorepo5.9% of 622

The corpus contains 2,345 AGENTS.md matching files. These files score highest.All 2,345

NoRepository and pathCoversScoreChanged

n8n-io/n8npackages/@n8n/agents/AGENTS.md100 /1007 days ago

vllm-project/vllmAGENTS.md100 /1007 days ago

elastic/elasticsearchx-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/AGENTS.md100 /1002 months ago

code-yeongyu/oh-my-openagentpackages/web/AGENTS.md100 /1006 days ago

rails/railsAGENTS.md100 /1002 months ago

aaif-goose/gooseAGENTS.md100 /1006 days ago

ethereum/go-ethereumAGENTS.md100 /1002 months ago

wpscanteam/wpscanAGENTS.md100 /1002 months ago

ModelEngine-Group/nexentAGENTS.md100 /1001 month ago

level09/enfernoAGENTS.md100 /100yesterday

OnlyTerp/prompt-cache-skillsAGENTS.md100 /1002 months ago

unoplat/unoplat-code-confluenceunoplat-code-confluence-frontend/AGENTS.md100 /1001 month ago

duckduckgo/content-scope-scriptsspecial-pages/AGENTS.md100 /1002 months ago

SkeneTechnologies/skene-cookbookAGENTS.md100 /1002 months ago