ryu-tool-registry 0.0.5

Unified tool-catalog primitive for Ryu (#474): the Contract-1 descriptor types (`ToolKind`/`ToolDescriptor`/`DescribedTool`/`DescribedArg`), the swappable `ToolRanker` (BM25 default + an embedder-backed Semantic seam), argument-schema parsing, and the pure search/describe bodies over `ToolDescriptor`. An extracted Core capability crate: in-process by default, consumed as a NON-optional path dependency (the `/api/tools/{search,describe}` endpoints and the mcp_bridge tool-search meta-tool reach it in every build, including lean). The semantic embedder injects via the narrow `ToolEmbedder` trait, so the crate has ZERO dependency on apps/core — the `RegistryTool`→`ToolDescriptor` ingest adapter, the built-in server inventory classification, the Composio live fetch, and the registry-driven embedder choice stay Core-side (`apps/core/src/sidecar/mcp/catalog.rs` + `apps/core/src/tool_registry_host.rs`).

ryu-tool-registry

Unified tool-catalog primitive for Ryu (#474): the descriptor types and the pure search / describe bodies behind a swappable ranker seam.

Role in the decomposition

An extracted Core capability crate — in-process by default and consumed as a non-optional path dependency: the /api/tools/{search,describe} endpoints and the mcp_bridge tool-search meta-tool reach it in every build (including lean). It carries zero dependency on apps/core. The semantic embedder injects via the narrow ToolEmbedder trait. The RegistryTool → ToolDescriptor ingest adapter, built-in server inventory classification, Composio live fetch, and the registry-driven embedder choice stay Core-side.

Key API (`src/lib.rs`)

ToolDescriptor / ToolKind / DescribedTool / DescribedArg — the Contract-1 descriptor types over which search and describe operate.
ToolRanker — swappable ranker; BM25 default plus an embedder-backed Semantic seam.
ToolEmbedder — trait the semantic ranker calls; supplied by Core.
run_search — the pure search body over [ToolDescriptor].
describe_from_parts / describe_composio / described_args / arg_summary — argument-schema parsing and describe bodies.

Swap seam

ToolRanker selects the ranking strategy: BM25 lexical default, or a Semantic ranker backed by any host-provided ToolEmbedder — chosen by Core via the model registry, never hardcoded.

Consumed as