docs(ai): update quickstart and contributing (agent)

CONTRIBUTING.md

@@ -35,7 +35,7 @@ If we later introduce **dual-licensing** options (e.g., commercial licenses for
 ## Agent PR Conventions
 
 Automated agents contributing to this repository should follow these rules:
-- **Atomic Commits**: Keep changes small and self-contained.
+- **Atomic Commits**: Keep changes small, focused, and self-contained.
 - **Descriptive Titles**: Use clear, semantic titles (e.g., `fix(ui): resolve upload modal overflow`).
 - **Commit Messages**: Use the convention `type(scope): description (agent)` (e.g., `fix(ai): formatting (agent)` or `docs(ai): update quickstart (agent)`).
 - **Reference Issues**: Link to relevant issues in the PR description.

README.md

@@ -154,8 +154,10 @@ http://localhost:8000
 
 ### Quickstart Commands
 
-- **Run unit tests**: `npm run test:unit`
-- **Format code**: `npm run format`
+See [`CONTRIBUTING.md`](./CONTRIBUTING.md) for the full developer guide.
+
+- **Run unit tests**: `npm run test:unit` (Required before PRs)
+- **Format code**: `npm run format` (Required before PRs)
 - **Lint code**: `npm run lint`
 - **Run DM unit tests**: `npm run test:dm:unit`
 - **Run DM integration tests**: `npm run test:dm:integration`
@@ -212,7 +214,7 @@ const event = buildVideoPostEvent({
     videoRootId: "my-first-video", // Logical ID, typically matches the d-tag
     url: "https://example.com/video.mp4",
     description: "This is a test video post sent via the SDK."
-    // magnet: "magnet:?xt=urn:btih:..." // Optional fallback
+    // magnet: "magnet:?xt=urn:btih:..." // Optional fallback (provide the raw magnet string)
   }
 });