EXTENSIONS

Nix shell execution driver that runs model methods inside a nix shell with declarative package dependencies. Provides reproducible execution environments without containers.

Deterministically reproduce a governed data-science run — or replay someone else's captured Claude Science session. The headless runtime of the session-* suite: `run` executes a filled analysis template (R/qmd in a pinned nix R env), `run-targets` a targets pipeline via a harvester, `run-notebook` Python/ipynb via papermill in a locked conda/Docker env — each with the recorder armed and its swamp.returns contract verified. `replay` faithfully re-runs recorded R against frozen tolerance rules (nix preferred, docker fallback), and a Python host-replay shim serves a captured session's host.* calls offline (or falls through to the live API in hybrid mode). Same inputs, same environment, same result — reproducibility you can run, not just cite.

Manage Nix flakes: fetch metadata, show outputs, check, update, and build