nordisk/facett

facett-arrow — crate card

Reverse-engineered (from source — verify, don't trust the name)

• One-line pitch: The Apache Arrow → facett Scene adapter — turn an edge RecordBatch straight into a drawable graph.
• Does: scene_from_batch(batch, src, dst, src_label, dst_label) reads Int64 src/dst id columns + optional Utf8 label columns (rows with null endpoints skipped) and builds a Scene via facett_graph::scene_from_labeled_edges; scene_from_edge_batch is the src/dst/sl/dl convention shortcut. Also cell_string to format arbitrary Arrow cells to display strings (used to build tables from batches).
• Key deps: facett-graph (Scene + edge adapter), facett-table (row/table building), arrow-array (arrow-schema dev-only).
• Shape: lib; tiny (single lib.rs).
• Observed role in the workspace: The "Apache Arrow integration" seam — any Arrow source becomes a Scene with no per-consumer plumbing. Used by facett-icebergview (Arrow frame → Table) and re-exported by the umbrella facett.

Fill in (one line each — only the human knows these)

• Primary consumer(s):
• Why it exists (vs the obvious alternative):
• Hard constraint (airgap / no-C-deps / no-FFI / pure-Rust / etc.):
• Release cadence & independence (rides a parent? own repo someday?):
• Status (production / prototype / experimental / stubbed):
• Must-NOT-change invariant:
• Biggest known gap or TODO:
• Anything a newcomer would get wrong about it: