Web UI

The web UI does everything the terminal does, plus video review of every trajectory.

tandem ui                    # http://127.0.0.1:8787, or the next free port
tandem ui --port 9000 --no-open

The UI needs no Node, CDN, GPU or robot. ui.host, ui.port and ui.open_browser set its defaults. Ctrl-C lets running sessions park the arm and finish merging. A second Ctrl-C quits at once and leaves the arm where it is.

Trajectories: click a plot to seek every video. A merged trajectory's ribbon shows who drove each stretch. Shaded bands mark the frames π₀.₅-DROID's training drops as idle.
Collect: the same controls as the terminal. Anything the plan leaves out is shown before the arm moves, and you can review the trial right at the label prompt.
Profiles: the paper's five and your own. You can create one from a task or as a copy, edit it, and see what its planner receives.
Settings: the rig (robot, cameras, calibration, each planner's machine settings), credentials, paths, catalogs, runtime status and tandem doctor.

Flags: -p/--port, --host, --no-open, and --profile (open on a profile and make it active).

HTTP API

curl http://127.0.0.1:8787/api/rig
curl -X PATCH http://127.0.0.1:8787/api/rig -H 'Content-Type: application/json' \
     -d '{"robot.host": "NUC_ADDRESS", "cameras.external_2": null}'

route	returns or does
`GET /api/planners[/{name}]`, `GET /api/executors`	Same as `planners list\\|info --json` and `executors list --json`. Add `?profile=P` for another profile.
`POST /api/planners/{name}/use\\|default`, `POST /api/executors/{name}/use`	Same as `planners use` (optional body: `profile`, `options`), `planners default` and `executors use` (optional body: `profile`).
`GET /api/profiles/{name}`	The profile, plus `planner_view.receives` (as `profile show --planner`). Each card in `GET /api/profiles` has a `planner_summary` line.
`POST /api/profiles`	Same as `profile create`. Body `{name, prompt}` uses the paper's settings; `{name, from}` copies a profile (`prompt` optional). `POST /api/profiles/builtin` adds the paper's five, as `init` does.
`GET /api/rig`, `PATCH /api/rig`	Same as `rig show --json`, and `rig set` for several keys at once.
`GET /api/sessions/{id}`	The session summary and its last 500 log lines.
`GET /api/media/{profile}/{id}/{file}`	A trajectory video, served with HTTP Range. A proxy in front must pass `Range` headers.

The API can't install a planner. Each catalog row includes the install_command to run instead.