Agent Friendly Code

mastra-ai/mastra

GitHub
https://github.com/mastra-ai/mastra

Mastra is the modern TypeScript framework for AI-powered applications and agents.

Stars:
29.3k
Language:
TypeScript
Default branch:
main
Last scored:
Overall

At a glance

Rank
#35 of 401
Top 9% · #5 of 82 TypeScript repos
Checks passed
11 of 17
Full list below
Best set up for
Cursor
Score 91.6
Needs most work for
Aider
Biggest fix: .aider.conf.yml (+14.1 pts)

What it has

What it's missing

What to fix first

Pick an AI agent

Showing fixes for Claude Code

  1. 1
    Manageable size
    If possible, split into smaller modules or carve out a focused entry path. Document where to start in AGENTS.md.
    +5.3 pts
  2. 2
    Reproducible dev env
    Add a Makefile or devcontainer or Dockerfile so the agent can set up the project in one command.
    +4.7 pts
  3. 3
    Test suite
    Add a tests/ (or test/, __tests__/, spec/) directory with runnable tests. Document how to run them in AGENTS.md.
    +3.9 pts

Score for each AI agent

Each agent weighs the checks by its own docs. Under each score are its top three. How each agent is scored →

Cursor
#6 of 401
91.6
  • ✓Cursor rules (.cursor/rules)
  • ✓README
  • ✓Type configuration
Codex
#39 of 401
88.4
  • ✓AGENTS.md / CLAUDE.md
  • ✓README
  • ~Test suite
Kimi Code CLI
#35 of 401
88.4
  • ✓AGENTS.md / CLAUDE.md
  • ~Test suite
  • ✓Dependency manifest
Pi
#38 of 401
87.9
  • ✓AGENTS.md / CLAUDE.md
  • ~Test suite
  • ✓Linter / formatter config
Devin
#22 of 401
86.3
  • ~Reproducible dev env
  • ✓Dependency manifest
  • ~Test suite
Claude Code
#71 of 401
86.1
  • ✓AGENTS.md / CLAUDE.md
  • ~Test suite
  • ~Reproducible dev env
Gemini CLI
#42 of 401
78.8
  • ✗GEMINI.md
  • ✓README
  • ~Test suite
OpenHands
#49 of 401
77.7
  • ✓CI configuration
  • ✓Dependency manifest
  • ~Reproducible dev env
Aider
#85 of 401
74.4
  • ✗.aider.conf.yml
  • ✓Linter / formatter config
  • ~Test suite

Does mastra-ai/mastra have agent instructions?

An AGENTS.md (or CLAUDE.md) at the root tells AI coding agents how to build, test and work in the repo. A few agents also read a file of their own.

AGENTS.md / CLAUDE.md
AGENTS.md (new tab) · 1,759 characters
Agent-specific files
packages/playground/.cursor/rules (new tab) (2 .mdc files), .agents/skills (new tab) (3 skills)No GEMINI.md, .openhands/setup.sh or .aider.conf.yml
Repos that have one
62 of 82 TypeScript repos · 221 of 401 repos on the leaderboard · See examples →

All 17 checks · 11 passed

Skills (.agents/skills)· 100% pass
3 skills in .agents/skills/
.agents/skills/label-core-bugs/SKILL.md
AGENTS.md / CLAUDE.md· 100% pass
Substantive (1,759 characters)
AGENTS.md
.aider.conf.yml· 0% pass
No .aider.conf.yml at repo root
CI configuration· 100% pass
33 GitHub Actions workflows
.github/workflows
CONTRIBUTING guide· 100% pass
Guide present
CONTRIBUTING.md
Cursor rules (.cursor/rules)· 100% pass
2 .mdc files in .cursor/rules/ folders
packages/playground/.cursor/rules/frontend.mdc
Dependency manifest· 100% pass
Manifest present
package.json
Reproducible dev env· 60% pass
package.json has 80 scripts
package.json
GEMINI.md· 0% pass
No GEMINI.md at repo root
License file· 100% pass
License present
LICENSE.md
Linter / formatter config· 100% pass
Config detected
.prettierrc
.openhands/setup.sh· 0% pass
No .openhands/setup.sh
Pre-commit / git hooks· 100% pass
Hook framework configured
.husky
README· 100% pass
README detailed (7,194 characters)
README.md
Manageable size· 20% pass
10000+ files — very large
Test suite· 70% pass
Test files detected (.github/scripts/check-changeset-packages.test.mjs)
.github/scripts/check-changeset-packages.test.mjs
Type configuration· 100% pass
Type config present
tsconfig.json

How mastra-ai/mastra compares

vs leaderboard average
17.6 pts above
Average 66.8
vs TypeScript average
13.2 pts above
Average 71.2
Stars among TypeScript repos
#59 of 82

Passes checks most repos miss

  • Skills (.agents/skills) · only 17% of repos pass it
  • Cursor rules (.cursor/rules) · only 4% of repos pass it
  • Pre-commit / git hooks · only 29% of repos pass it

One fix for the most agents: Manageable size would raise the score for all 9 agents, by up to 5.7 points.

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All TypeScript repos →

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Repos tagged with the same GitHub topics, most shared first.

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