🧙Mastra
Mastra is the modern TypeScript framework for AI-powered applications and agents.
⭐ Very popular: 27k stars, gaining about 204 a week
View on GitHub ↗repo profile
momentum
durability
bus factor = how many people it takes to cover more than half the commits (6 months). 1 is a solo project; higher means the work is spread across a team. top-author share is the single busiest author's slice of those commits.
since we covered it
why it's a big deal
- Its human-in-the-loop suspend and resume is backed by storage, so a workflow can pause indefinitely and pick up where it left off - the core move an always-on agent depends on.
- A graph-based workflow engine with explicit control flow turns open-ended agent loops into durable, inspectable processes you can operate.
- Built-in evals and observability treat reliability as part of the framework, not a bolt-on once the agent ships.
under the hood
- Model routing across 40+ providers behind one interface, plus working and semantic memory that survives a session.
- Authors and exposes MCP servers, and integrates with the Vercel AI SDK UI and CopilotKit for front-ends.
- Deploys into React, Next.js, or Node, or as a standalone server, with control flow as.then(),.branch(), and.parallel().
our take from PR#36, 2026-06-17
star history
- PR#36 25k 2026-06-17
- now 27k + 2k since first covered
curve is sampled from GitHub's star history, plus our own daily readings since we covered it; the dashed stretch is before we first covered it, the solid line since. figures at coverage are the numbers we printed then (approx.), current count is live.
understory
Deep in the understory, shipping hard, still flying under the radar.
- output, commits & releases
- clout, star velocity
output = commits & releases; clout = star velocity, both 0 to 100 monthly indices; the gap where output runs above clout is the understory. The understory →
covered in
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Durable, resumable workflows for long-running agents
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