Add OAuth support for upstream MCP servers (#381)

Co-authored-by: samanhappy <samanhappy@gmail.com>

AGENTS.md

@@ -0,0 +1,30 @@
+# Repository Guidelines
+
+These notes align current contributors around the code layout, daily commands, and collaboration habits that keep `@samanhappy/mcphub` moving quickly.
+
+## Project Structure & Module Organization
+- Backend services live in `src`, grouped by responsibility (`controllers/`, `services/`, `dao/`, `routes/`, `utils/`), with `server.ts` orchestrating HTTP bootstrap.
+- `frontend/src` contains the Vite + React dashboard; `frontend/public` hosts static assets and translations sit in `locales/`.
+- Jest-aware test code is split between colocated specs (`src/**/*.{test,spec}.ts`) and higher-level suites in `tests/`; use `tests/utils/` helpers when exercising the CLI or SSE flows.
+- Build artifacts and bundles are generated into `dist/`, `frontend/dist/`, and `coverage/`; never edit these manually.
+
+## Build, Test, and Development Commands
+- `pnpm dev` runs backend (`tsx watch src/index.ts`) and frontend (`vite`) together for local iteration.
+- `pnpm backend:dev`, `pnpm frontend:dev`, and `pnpm frontend:preview` target each surface independently; prefer them when debugging one stack.
+- `pnpm build` executes `pnpm backend:build` (TypeScript to `dist/`) and `pnpm frontend:build`; run before release or publishing.
+- `pnpm test`, `pnpm test:watch`, and `pnpm test:coverage` drive Jest; `pnpm lint` and `pnpm format` enforce style via ESLint and Prettier.
+
+## Coding Style & Naming Conventions
+- TypeScript everywhere; default to 2-space indentation and single quotes, letting Prettier settle formatting. ESLint configuration assumes ES modules.
+- Name services and data access layers with suffixes (`UserService`, `AuthDao`), React components and files in `PascalCase`, and utility modules in `camelCase`.
+- Keep DTOs and shared types in `src/types` to avoid duplication; re-export through index files only when it clarifies imports.
+
+## Testing Guidelines
+- Use Jest with the `ts-jest` ESM preset; place shared setup in `tests/setup.ts` and mock helpers under `tests/utils/`.
+- Mirror production directory names when adding new suites and end filenames with `.test.ts` or `.spec.ts` for automatic discovery.
+- Aim to maintain or raise coverage when touching critical flows (auth, OAuth, SSE); add integration tests under `tests/integration/` when touching cross-service logic.
+
+## Commit & Pull Request Guidelines
+- Follow the existing Conventional Commit pattern (`feat:`, `fix:`, `chore:`, etc.) with imperative, present-tense summaries and optional multi-line context.
+- Each PR should describe the behavior change, list testing performed, and link issues; include before/after screenshots or GIFs for frontend tweaks.
+- Re-run `pnpm build` and `pnpm test` before requesting review, and ensure generated artifacts stay out of the diff.