v2.0.0

Changed

• Replaced the pipeline input contract with contract.input.refs.
• Added direct $ target semantics for single-value child input.
• Added named and nested target semantics for compact child input assembly.
• readSet now derives every declared input ref from contract.input.refs.
• Read refs may target $.context.input, $.context.effects, $.context.data, or nested paths under those buckets.

Removed

• Removed support for legacy contract.input.ref.

v1.0.0

Added

• Initial release of @processengine/dataflows v1.
• validateDataflow(source, options?) — validates source artifact without execution.
• prepareDataflow(source, options?) — compiles source to immutable DataflowArtifact.
• executeDataflow(artifact, input, options?) — executes prepared artifact, returns DataflowOutput.writes[].
• extractDataflowSchema(source) — extracts schema from source.
• formatDataflowDiagnostics(diagnostics) — formats diagnostics for CLI/logs.
• formatDataflowRuntimeError(error) — formats runtime error for CLI/logs.
• DataflowCompileError — thrown by prepareDataflow on invalid source.
• DataflowRuntimeError — thrown by executeDataflow on runtime failure.
• Inline schema and schemaRef support.
• readSet / writeSet derivation in prepared artifact.
• Read-after-write semantics within pipeline.
• Atomic writes — no partial result on failure.
• Trace modes: 'off' (default), 'basic', 'verbose'.
• Transport-safe DataflowOutput — JSON-safe, no host cleanup required before semantics.reduce.
• Pack/install smoke test via npm run test:pack.
• CI workflow for Node.js 20 and 22.
• Release workflow via tag push → npm publish + GitHub Release.