Run the workbench

The browser is a reader of Python results, not a second scientific implementation. Start from the installed checkout and the authorised Site01 CAS store. No public source download or invented replacement is provided.

Start it

Check the scientific sidecar.
```
uv run --frozen python -I -m lunartrace.workbench --check
```
This loads the frozen Site once, prints a provenance summary and exits. The store comes from LUNARTRACE_SOURCE_STORE and has no default; the sidecar’s --store option selects another authorised replica. A missing blob is a refusal, not zero terrain or a synthetic result.
Start two local processes in separate terminals, from the repository root.
Terminal 1: Python sidecar
```
task workbench:py
```
Terminal 2: browser client
```
task dev
```
Both are long-running. Successful startup shows as listening endpoints and an HTTP response, not as an immediate exit code.
Open http://127.0.0.1:4317/.

The Python sidecar listens on 127.0.0.1:4318, and Vite proxies /py/ requests to it. The Lab editor uses 127.0.0.1:4319 when started. Stop your own processes with Ctrl+C when you are done.

The plain development path does not need a Cesium ion token; ion basemap imagery is optional display context, never numeric truth. If Python is unavailable, the instruments show their problem states; the browser must not manufacture an evaluation.

Isolated sidecar check

When the default port is occupied:

uv run --frozen --group notebook python -I -m lunartrace.workbench --port 4328 --lab-port 4329

This verifies sidecar startup only. The checkout’s Vite proxy still targets 4318, so do not mistake an isolated listener for the sidecar the browser is connected to. Leave another lane’s existing listener running.

Follow the research workflow

Scene	First useful action	Evidence to retain
Explore	Inspect Source/Method/Evidence and select a source ROI	Witness identity and standing
Analyze	Inspect Rows, choose τ, brush Cells, open Python/Lab	Exact Python values; note Cells are sampled
Compare	Save evaluated runs and restore a capsule	ROI and τ identities; no admission promotion
Publish	Export a Python numeric Figure and raw rows	Source, method and matching run/provenance
Present	Show Moon and Figure together	Visible standing and scientific limits

Scenes are layouts over shared research state, not five different methods. See the scientific workflow for the steps and failure states, workbench instruments for the controls, and export for the difference between numeric Figures, screenshots and local run capsules.