v3.9.1

A patch release: /edge on Cloudflare Workers without nodejs_compat no longer throws "process.emitWarning is not a function" for cached pipelines and cost estimates.

npm install @devilsdev/rag-pipeline-utils@^3.9.1

No new features or options; upgrade if you use @devilsdev/rag-pipeline-utils/edge.

Fixed

• Warnings on /edge no longer throw. On Workers without nodejs_compat there is no process, so process.emitWarning was missing: a cached pipeline whose embedder, retriever or LLM has no cache key failed its run, and CostCalculator.estimate() for a model with no price threw. These warnings now go to console.warn as "[CODE] Type: message", as do AnthropicConnector's when it sends a request again without a temperature the model rejects, and GuardrailsPipeline's when its retrieval guard was skipped. Node's own process is used as it is, and Vercel Edge's process is wrapped, not changed. The workerd edge test checks all four.

Changed

• New README images and badges: a new banner, a "What checkAnswer catches" card and a feature strip, in the docs site's fonts and colours, and badges to match.

The scoped packages, @devilsdev/rag-mcp-server and create-rag-pipeline are released at 3.9.1 too, unchanged apart from the version. Full details: CHANGELOG · Blog post