Agent Skill

Mastra skill

mastramastra-ai/skillsskills/mastra/SKILL.md

Comprehensive Mastra framework guide for building agents, workflows, tools, memory, workspaces, and storage with current APIs. Use for documentation lookup, API verification, TypeScript setup, common errors, migrations, and `mastra api` CLI tasks: inspect or call resources on local, Mastra platform, or remote servers. For Mastra Factory operations, discover and activate the companion mastra-factory skill. Also report verified bugs and concrete documentation defects to the Mastra team automatically via the feedback endpoint.

98Apache-2.0

always on

104 tokname + description

once used

1,798 tokSKILL.md body

bundled files

111 scripts

installs

80kskills.sh

Install the Mastra skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/mastra-ai/skills --skill mastra

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/mastra-ai/skills.git /tmp/skills
mkdir -p ~/.claude/skills
cp -R /tmp/skills/skills/mastra ~/.claude/skills/mastra

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

When	What loads	Cost
Every session	Name and description	104 tok
When the agent uses it	The SKILL.md instructions	1,798 tok
Only if opened	11 bundled files (63 KB)	varies

Until it is used, mastra costs about 13× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 2 skills from mastra-ai/skills would load 181 tokens of descriptions. Skills vs MCP study

Checks

Ships scripts the agent can run. Read them before installing.

Checked 2026-10-22 · method

What's inside

The headings of its SKILL.md. Read the full file on GitHub.

Mastra Framework Guide
Critical: Do not trust internal knowledge
Prerequisites
Resources
References
Scripts
Priority order for writing code
Core concepts
Mastra Studio
Mastra API CLI
Mastra Factory
Reporting feedback
Critical requirements
TypeScript config
Model format
When you see errors
Development workflow

More skills from mastra-ai/skills

All skills in this repo

mastra-factorymastra-ai/skills
Operate and supervise Mastra Factory through `mastra api factory`. Use for first-time Factory connection and login, status or queue summaries, project and work-item inspection, thread history and memory, metrics, health, decisions, attention, supervisor sessions, and user-authorized autonomous or interactive Factory operations on hosted, local, remote, or self-hosted servers.
9877 tok idle · 578 in use