Models & providers

File-backed credentials provider: four layers, one honest precedence.

Provider-neutral LLM vocabulary and abstract service. This package defines the canonical language spoken by the agent loop, session logs, and every plugin.

DeepSeek chat-completions adapter for the harness LLM seam: direct `fetch` + SSE (framed by `eventsource-parser`) translating the official wire format (source of truth: the API docs — guides/thinking_mode, guides/tool_calls, api/create-chat-completion) into the `StreamChunk` protocol.

Generic multi-provider adapter for the harness LLM seam backed by `@earendil-works/pi-ai`. One plugin instance owns a dict of provider profiles keyed by route; every request selects a profile with `GenerateOptions.provider` and resolves `GenerateOptions.model` against that route's configured catalog. A route naming an installed pi-ai provider inherits its endpoint, wire protocol, and model catalog as defaults and overrides them field by field; a route pi-ai does not ship is declared outright, so an OpenAI-compatible gateway, a self-hosted server, or a provider newer than the installed catalog is configuration rather than a code change.

Function plugin that applies exact-provider retry policy through the agent loop's closed-step `agent/request-error` waterfall. It does not wrap `ctx.llm.stream()`: every adapter call remains one provider attempt, and every retry opens a fresh numbered turn.

Replay-aware token measurement through the singleton `ctx.tokenMeter` service. It advances one isolated fold per session from the durable log, so compaction and other pressure-sensitive plugins can share accounting without depending on `CompactionEngine`.