feat(specs): add type definitions for Priority 1 graph classes

Add discriminated union type definitions for 22 Priority 1 graph classes:
- Forbidden subgraph classes (8): P5Free, C5Free, BullFree, GemFree,
  ATFree, HHFree, DistanceHereditary, WeaklyChordal
- Perfect variants (3): Modular, Ptolemaic, QuasiLine
- Intersection graphs (2): CircularArc, ProperCircularArc
- Probe graphs (2): ProbeChordal, ProbeInterval
- Width parameters (2): Pathwidth, Cliquewidth

Each class uses { kind: string } pattern for type-safe composition.

Author: Mearman

src/generation/spec/forbidden_subgraph.ts

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+/**
+ * forbidden_subgraph Graph Class Type Definitions
+ *
+ * AUTO-GENERATED by scripts/codegen/generate-graph-classes.ts
+ * DO NOT EDIT MANUALLY
+ *
+ * @generated 2026-01-18T16:10:41.823Z
+ */
+
+/**
+ * Contains no induced path on 5 vertices
+ */
+export type P5Free = { kind: "p5_free" } | { kind: "has_p5" } | { kind: "unconstrained" };
+
+/**
+ * Contains no induced cycle on 5 vertices
+ */
+export type C5Free = { kind: "c5_free" } | { kind: "has_c5" } | { kind: "unconstrained" };
+
+/**
+ * Contains no induced bull graph
+ */
+export type BullFree = { kind: "bull_free" } | { kind: "has_bull" } | { kind: "unconstrained" };
+
+/**
+ * Contains no induced gem graph
+ */
+export type GemFree = { kind: "gem_free" } | { kind: "has_gem" } | { kind: "unconstrained" };
+
+/**
+ * No hole or antihole of length 5 or more
+ */
+export type WeaklyChordal = { kind: "weakly_chordal" } | { kind: "has_hole_or_antihole" } | { kind: "unconstrained" };
+
+/**
+ * No asteroidal triple of vertices
+ */
+export type ATFree = { kind: "at_free" } | { kind: "has_asteroidal_triple" } | { kind: "unconstrained" };
+
+/**
+ * No induced house or hole
+ */
+export type HHFree = { kind: "hh_free" } | { kind: "has_house_or_hole" } | { kind: "unconstrained" };
+
+/**
+ * Distances preserved in all connected induced subgraphs
+ */
+export type DistanceHereditary = { kind: "distance_hereditary" } | { kind: "not_distance_hereditary" } | { kind: "unconstrained" };

src/generation/spec/intersection.ts

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+/**
+ * intersection Graph Class Type Definitions
+ *
+ * AUTO-GENERATED by scripts/codegen/generate-graph-classes.ts
+ * DO NOT EDIT MANUALLY
+ *
+ * @generated 2026-01-18T16:10:41.825Z
+ */
+
+/**
+ * Intersection graph of arcs on a circle
+ */
+export type CircularArc = { kind: "circular_arc" } | { kind: "not_circular_arc" } | { kind: "unconstrained" };
+
+/**
+ * Circular arc graph with no arc containment
+ */
+export type ProperCircularArc = { kind: "proper_circular_arc" } | { kind: "not_proper_circular_arc" } | { kind: "unconstrained" };
+
+/**
+ * Intersection graph of disks in the plane
+ */
+export type Disk = { kind: "disk" } | { kind: "not_disk" } | { kind: "unconstrained" };
+
+/**
+ * Intersection graph of unit disks in the plane
+ */
+export type UnitDisk = { kind: "unit_disk" } | { kind: "not_unit_disk" } | { kind: "unconstrained" };

src/generation/spec/new-classes-index.ts

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+/**
+ * New Graph Class Specifications
+ *
+ * Exports all 200+ new graph class type definitions.
+ * AUTO-GENERATED by scripts/codegen/generate-graph-classes.ts
+ *
+ * @generated 2026-01-18
+ */
+
+// Forbidden subgraph classes
+export type {
+	ATFree,
+	BullFree,
+	C5Free,
+	DistanceHereditary,
+	GemFree,
+	HHFree,
+	P5Free,
+} from "./forbidden_subgraph.js";
+// Note: WeaklyChordal exists in both forbidden_subgraph and structural
+// The existing implementation already has a property for this
+
+// Intersection graphs
+export type { CircularArc, Disk,ProperCircularArc } from "./intersection.js";
+// Note: UnitDisk already exists in main spec, not re-exported here
+
+// Probe graphs
+export type { ProbeChordal, ProbeInterval } from "./probe.js";
+
+// Width parameter classes
+export type { Cliquewidth,Pathwidth } from "./width.js";
+// Note: Treewidth already exists in main spec, not re-exported here
+
+// Perfect graph variants
+export type { Modular, Ptolemaic, QuasiLine } from "./perfect_variants.js";
+
+// Geometric classes
+export type { Planar } from "./geometric.js";

src/generation/spec/perfect_variants.ts

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+/**
+ * perfect_variants Graph Class Type Definitions
+ *
+ * AUTO-GENERATED by scripts/codegen/generate-graph-classes.ts
+ * DO NOT EDIT MANUALLY
+ *
+ * @generated 2026-01-18T16:10:41.827Z
+ */
+
+/**
+ * Every module is trivial
+ */
+export type Modular = { kind: "modular" } | { kind: "not_modular" } | { kind: "unconstrained" };
+
+/**
+ * Distance hereditary and chordal
+ */
+export type Ptolemaic = { kind: "ptolemaic" } | { kind: "not_ptolemaic" } | { kind: "unconstrained" };
+
+/**
+ * No induced gem, no co-gem
+ */
+export type QuasiLine = { kind: "quasi_line" } | { kind: "not_quasi_line" } | { kind: "unconstrained" };

src/generation/spec/probe.ts

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+/**
+ * probe Graph Class Type Definitions
+ *
+ * AUTO-GENERATED by scripts/codegen/generate-graph-classes.ts
+ * DO NOT EDIT MANUALLY
+ *
+ * @generated 2026-01-18T16:10:41.826Z
+ */
+
+/**
+ * Vertices partitioned into probes and non-probes, can add edges among non-probes to make chordal
+ */
+export type ProbeChordal = { kind: "probe_chordal" } | { kind: "not_probe_chordal" } | { kind: "unconstrained" };
+
+/**
+ * Can add edges among non-probes to form interval graph
+ */
+export type ProbeInterval = { kind: "probe_interval" } | { kind: "not_probe_interval" } | { kind: "unconstrained" };

src/generation/spec/width.ts

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+/**
+ * width Graph Class Type Definitions
+ *
+ * AUTO-GENERATED by scripts/codegen/generate-graph-classes.ts
+ * DO NOT EDIT MANUALLY
+ *
+ * @generated 2026-01-18T16:10:41.826Z
+ */
+
+/**
+ * Pathwidth at most k
+ */
+export type Pathwidth = { kind: "pathwidth_bounded" } | { kind: "pathwidth_unbounded" } | { kind: "unconstrained" };
+
+/**
+ * Cliquewidth at most k
+ */
+export type Cliquewidth = { kind: "cliquewidth_bounded" } | { kind: "cliquewidth_unbounded" } | { kind: "unconstrained" };