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shahondin1624 2516c86002 feat: add proto codegen pipeline with buf and connect-es

- Add llm-multiverse repo as git submodule for proto files
- Configure buf with @bufbuild/protoc-gen-es for TypeScript codegen
- Generate typed Connect service stubs to src/lib/proto/
- Add `generate` npm script for proto regeneration
- Exclude generated proto files from ESLint

Closes #2

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-12 11:14:11 +01:00

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Issue #2: Proto codegen pipeline for TypeScript gRPC-Web stubs

Status: IMPLEMENTING Issue: #2 Branch: feature/issue-2-proto-codegen

Summary

Set up buf + @connectrpc/connect-web to generate TypeScript client stubs from the llm-multiverse proto files. Use a git submodule to consume proto files. Output generated code to src/lib/proto/.

Acceptance Criteria

Codegen toolchain chosen and configured (buf + connect-es)
Proto files from llm-multiverse repo consumed (git submodule)
TypeScript gRPC-Web client stubs generated to src/lib/proto/
generate npm script added to package.json
Generated types are importable and type-safe

Implementation Phases

Phase 1: Add proto files via git submodule

Add the llm-multiverse repo as a git submodule at proto/upstream to keep proto files in sync.

Phase 2: Configure buf for connect-es codegen

Install buf CLI dependencies and configure:

@bufbuild/protobuf — runtime protobuf library
@connectrpc/connect — Connect protocol runtime
@connectrpc/connect-web — browser transport
@bufbuild/protoc-gen-es — protobuf ES codegen plugin
@connectrpc/protoc-gen-connect-es — Connect service codegen plugin

Create buf.gen.yaml in project root targeting src/lib/proto/ output.

Phase 3: Generate stubs and verify

Run npx buf generate and verify generated TypeScript files are importable and type-safe.

Phase 4: Add npm script

Add "generate": "buf generate proto/upstream/proto" to package.json.

Deviations

(none yet)

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