Lemma

Developer Resources

SDKs, documentation, and agent skills for setting up Lemma.

Start Here

Resource	Use it for
Quickstart	Send your first useful trace to Lemma.
Trace contract	Learn the trace shape Lemma expects.
TypeScript SDK	Instrument Node and TypeScript applications.
Python SDK	Instrument Python applications.
Lemma tracing skill	Let a coding agent add tracing for you.

Install

TypeScript:

npm install @uselemma/tracing

Python:

pip install uselemma-tracing

Both SDKs read Lemma credentials from environment variables by default:

export LEMMA_API_KEY=...
export LEMMA_PROJECT_ID=...

Integrations

Lemma includes first-party tracing helpers for common agent stacks:

Integration	Guide
Vercel AI SDK	docs
OpenAI Agents SDK	docs
LangChain	docs
LangGraph	docs

For manual instrumentation, start with the tracing overview.

Repository Layout

Path	Contents
docs/	Mintlify documentation source for docs.uselemma.ai.
packages/ts/tracing	TypeScript SDK package: @uselemma/tracing.
packages/py/tracing	Python SDK package: uselemma-tracing.
skills/lemma-tracing	Lemma tracing skill for coding agents.

Development

Install dependencies:

pnpm install
uv sync

Run TypeScript checks:

pnpm --filter @uselemma/tracing test
pnpm --filter @uselemma/tracing type-check
pnpm --filter @uselemma/tracing build

Run Python checks:

uv run --project packages/py/tracing --extra dev pytest packages/py/tracing/tests
uv build --package uselemma-tracing

Validate the docs config:

python3 -m json.tool docs/docs.json >/dev/null

Releases

Package publishing is driven by package version changes on main.

• Changes to packages/ts/tracing/package.json publish @uselemma/tracing when the version is not already present on npm.
• Changes to packages/py/tracing/pyproject.toml publish uselemma-tracing when the version is not already present on PyPI.

License

MIT