kotoba-lang/graph

Zero-dep portable .cljc — restored from the legacy kami-engine/kami-graph Rust crate (982 lines across src/lib.rs, src/data.rs, src/layout.rs; deleted in PR #82, "Remove Rust workspace from kami-engine", kotoba-lang/kami-engine) as part of the clj-wgsl migration (ADR-2607010930, com-junkawasaki/root).

What's here

• src/graph/data.cljc — transforms haisen/systemofsystem JSON (from the gftd CLI, already parsed into plain keyword maps) into a unified GraphData ({:nodes :edges :groups}). Ported from data.rs.
• src/graph/layout.cljc — force-directed graph layout (Fruchterman-Reingold style, pure layout -> [layout' running?] tick function) and the Merkle-DAG-style PCB layout (writer apps on top, reader apps on the bottom, shared "collection" nodes with >=3 incoming edges rendered as horizontal bus lines). Ported from layout.rs.
• src/graph.cljc — edge/group color palettes, instance-transform/color/line-vertex builders, and orthographic camera-extent helpers for rendering the layouts (mirrors the render-glue functions in lib.rs; actual GPU rendering stays substrate).

All data is plain maps/vectors (no records, no mutation) — Vec2/[f32;2] positions are plain [x y] vectors, Mat4 is a 16-float column-major vector matching glam::Mat4::to_cols_array, and the simulation state is threaded functionally rather than mutated in place. JVM/JS platform divergence (there is none currently needed here) would use #?(:clj ... :cljs ...) reader conditionals.

Status

Implemented. The original crate's one #[test] (layout::tests::test_basic_layout) is ported 1:1 in test/graph_test.cljc, plus additional coverage for graph.data (haisen/SoS JSON transforms, shorten-label), graph.layout (pcb-layout, tick/ reheat/settled semantics), and graph (colors, instance builders, camera extents) — 16 tests / 49 assertions, 0 failures.

Develop

clojure -M:test