Parent PRD

#2

What to build

Add standalone embedder functions to @agentskit/adapters. Each embedder satisfies the embed: (text: string) => MaybePromise<number[]> contract used by RAG. These are separate from the chat adapters — no coupling between chat and embedding.

Embedders: openaiEmbedder, geminiEmbedder, ollamaEmbedder (at minimum). Each takes provider config (apiKey, model) and returns the embed function.

Acceptance criteria

• openaiEmbedder({ apiKey, model? }) exported from adapters
• geminiEmbedder({ apiKey, model? }) exported from adapters
• ollamaEmbedder({ model, baseUrl? }) exported from adapters
• Each returns (text: string) => Promise<number[]>
• Contract tests verifying return shape
• Unit tests with mocked HTTP responses
• Exported from @agentskit/adapters main entry point
• Package builds and passes lint

Blocked by

• Blocked by Evolve core contracts & extract shared primitives #3 (core contracts)

User stories addressed

• User story 17 (bring your own embedder)
• User story 18 (adapter-provided embedders)