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Strata

Strata is a content-addressed computation graph with an interactive notebook UI.

Every cell output is a versioned artifact keyed by its provenance: source, inputs, and environment. Strata reads each cell's AST to build the dependency graph automatically, so re-running a notebook is mostly a series of cache hits. Prompt cells make AI calls first-class DAG nodes, cached by template, inputs, and model config. The # @worker gpu-fly annotation dispatches a cell to a remote GPU. The whole notebook is plain .py files plus a manifest, so commits are git-diffable and there are no JSON blobs or execution metadata bleeding into the history.

Strata Notebook

The interactive notebook surface: Python, prompt, SQL, and loop cells, each producing artifacts that flow through an auto-built DAG.

Key features:

  • Content-addressed caching (same code + inputs = cache hit)
  • Automatic DAG from variable analysis
  • Git-friendly format: cells are plain .py files, outputs and runtime state live outside the committed tree (no JSON blobs, no diffs on every run)
  • Distributed workers (@worker gpu-fly dispatches to remote GPU)
  • Prompt cells with {{ variable }} injection into AI calls
  • AI assistant with streaming chat and agent mode
  • Per-notebook Python environments via uv
  • Headless runner (strata run) for CI

Notebook Quickstart

Strata Core

The notebook is built on Strata Core, a standalone materialization and artifact layer. Core can also be used independently as a Python client library and REST API for any workflow that needs provenance-based caching, lineage tracking, or Iceberg table scanning.

from strata import StrataClient

client = StrataClient()
artifact = client.materialize(
    inputs=["file:///warehouse#db.events"],
    transform={"executor": "scan@v1", "params": {}},
)
table = client.fetch(artifact.uri)

Core API Quickstart

Quick Start

docker compose up -d --build

Then open http://localhost:8765.

uv sync
cd frontend && npm ci && npm run build && cd ..
STRATA_DEPLOYMENT_MODE=personal uv run strata-server

Then open http://localhost:8765.

See Installation for full details.

Status

Strata is currently in alpha. Both surfaces (Notebook and Core) are functional but the API may change before 1.0.