dag-ml-data WASM bindings

Browser-friendly bindings for dag-ml-data.

The default build exposes validation, planning, fingerprint and coordinator envelope helpers over UTF-8 JSON strings, with no host data buffers, provider vtables or file I/O.

The opt-in provider feature adds WasmInMemoryProvider, an eager in-WASM provider over dag-ml-data-provider's InMemoryProvider (JSON in, JSON out; handles cross as decimal strings because JS cannot represent the full u64 range). Build/test it with --features provider. An async JS buffer-fetcher provider (host buffers fetched on demand via a Promise) is intentionally deferred. With the feature on, contract_manifest_json() gains distinct provider_surface / provider_exports / provider_capabilities sections.

contract_manifest_json() returns a stable JSON manifest with the package version, supported contract ids, exported Python/WASM function names and shared fixture digests. Browser integrations should check it before accepting cached pipelines or persisted nirs4all-lite workspaces.

Build

cargo test -p dag-ml-data-wasm
node_out_dir="$PWD/target/wasm/dag-ml-data-wasm"
wasm-pack build crates/dag-ml-data-wasm --target nodejs --out-dir "$node_out_dir" --release
node scripts/smoke_wasm_bindings.cjs "$node_out_dir"
web_out_dir="$PWD/target/wasm-web/dag-ml-data-wasm"
wasm-pack build crates/dag-ml-data-wasm --target web --out-dir "$web_out_dir" --release
node scripts/smoke_wasm_web_bindings.mjs "$web_out_dir"

JavaScript Surface

import init, {
  contract_manifest_json,
  dataset_schema_fingerprint_json,
  plan_model_input_json,
} from "./pkg/dag_ml_data_wasm.js";

await init();
const manifest = JSON.parse(contract_manifest_json());
const fingerprint = dataset_schema_fingerprint_json(JSON.stringify(schema));
const plan = JSON.parse(
  plan_model_input_json(
    JSON.stringify(schema),
    JSON.stringify(modelInput),
    JSON.stringify(adapterRegistry),
    JSON.stringify(request),
  ),
);

Rust-side validation failures are returned as JSON strings with the ADR-11 descriptor fields category, code, severity, message, remediation_hint and context.

validate_fold_set_json checks only the exhaustive partition shape of a FoldSet: every sample must appear in validation exactly once. Use validate_fold_set_against_sample_relations_json when the browser workflow also needs group and augmentation-origin leakage checks.