nordisk/facett

facett-brokkr — crate card

Reverse-engineered (from source)

• One-line pitch: Author a Brokkr build pipeline as TOML, structural rows or an interactive dependency graph.
• Does: PipelineBuilder implements Elm and Facet. Text and Build modes preserve the existing constructors, edit methods, validation and emitted brokkr.toml. Graph mode uses facett_core::layered and a retained facett_flow::FlowScene for boxes, curves, arrows and validation status. Names and stage/backend subtitles remain local overlays.
• Editor: Output/input ports support pointer dragging and accessible activation. Connections update the consumer's needs; unknown endpoints, duplicate names, self-loops and cycles are refused with last_refusal. Node dragging paints a ghost and commits placement only on release. Select an edge and press Delete to disconnect it. Undo/Redo use the shared keymap and retain at most 200 forward/inverse edit-command entries: field/list changes, UTF-8 text splices and placement edits. Only raw TOML edits replace the document, preserving invalid in-progress text and exact formatting.
• State: The serializable model holds document fields, camera, fitted state, selection, drag state, layout overrides and history. Placement and camera are session state, excluded from brokkr.toml. Existing state_json keys remain; navigation, selection, refusals and history counts are additive. Pan, zoom and drag previews do not rebuild the cached scene.
• Robot seam: Existing mode and structural JSON messages remain. Added {"connect":["source","consumer"]}, {"disconnect":["source","consumer"]}, {"move":["step",40,80]}, "undo", "redo" and "fit".
• Key deps: facett-core, facett-flow with host/labels/boxes/arrows/status/hit-test, egui, serde, serde_json, toml. Optional wgpu delegates to flow; the host installs its GPU renderer. No build execution, network or nornir dependency in the library.
• Verification: All 31 actual-workspace tests pass with wgpu: unit/render/model tests, matrix replay, real pointer connection and node movement, edge deletion with keyboard Undo/Redo, 1,000 seeded edit sequences restoring exact TOML and invalid in-progress stage names. The watch example compiles against actual nornir-robotui 0.3.4 with wgpu,nornir-robotui/watch; its connection/movement/history replay has not been watched live.

Ownership and integration

Brokkr owns document edits and editor gestures. Falsett supplies rendering, curves, node rectangles and hit testing. Hosts read pipeline_toml() and perform any validation or execution outside the component. No release or publishing is performed by the editor.