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## Intent This is a small foundation cleanup for the tool architecture. The main decision is: registry tools and native SDK/model tools are different things. - Registry tools have descriptors, schemas, catalog entries, and execute through `ToolExecutorService` - Native model tools are opaque AI SDK objects, bound directly into the model `ToolSet` - Surfaces still own their policy: chat, MCP, and workflow agents decide what they expose ## What changed - Removed `NATIVE_MODEL` from `ToolCategory` - Kept `ToolRegistryService` focused on registry-backed tools only - Moved native model tool binding through `NativeToolBinderService` - Reused native binding from chat instead of duplicating provider-specific web-search logic - Kept MCP local execution exclusions in a dedicated constant - Moved surface-specific constants into dedicated constant files ## What comes next - Move hardcoded chat app preloads, like Exa web search, into app/manifest metadata - Decide a clearer policy for local runtime tools like code interpreter and HTTP request - Gradually document the three tool shapes: registry tools, native model tools, and local runtime tools --------- Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com> Co-authored-by: Félix Malfait <FelixMalfait@users.noreply.github.com> Co-authored-by: Félix Malfait <felix.malfait@gmail.com>