> If you make changes to the API or SDK (e.g. `packages/opencode/src/server/server.ts`), run `./script/generate.ts` to regenerate the SDK and related files.
Bun debugging is currently rough around the edges. We hope this guide helps you get set up and avoid some pain points.
The most reliable way to debug OpenCode is to run it manually in a terminal via `bun run --inspect=<url> dev ...` and attach
your debugger via that URL. Other methods can result in breakpoints being mapped incorrectly, at least in VSCode (YMMV).
Caveats:
-`*.tsx` files won't have their breakpoints correctly mapped. This seems due to Bun currently not supporting source maps on code transformed
via `BunPlugin`s (currently necessary due to our dependency on `@opentui/solid`). Currently, the best you can do in terms of debugging `*.tsx`
files is writing a `debugger;` statement. Debugging facilities like stepping won't work, but at least you will be informed if a specific code
is triggered.
- If you want to run the OpenCode TUI and have breakpoints triggered in the server code, you might need to run `bun dev spawn` instead of
the usual `bun dev`. This is because `bun dev` runs the server in a worker thread and breakpoints might not work there.
Other tips and tricks:
- You might want to use `--inspect-wait` or `--inspect-brk` instead of `--inspect`, depending on your workflow
- Specifying `--inspect=ws://localhost:6499/` on every invocation can be tiresome, you may want to `export BUN_OPTIONS=--inspect=ws://localhost:6499/` instead
#### VSCode Setup
If you use VSCode, you can use our example configurations [.vscode/settings.example.json](.vscode/settings.example.json) and [.vscode/launch.example.json](.vscode/launch.example.json).
Some debug methods that can be problematic:
- Debug configurations with `"request": "launch"` can have breakpoints incorrectly mapped and thus unusable
- The same problem arises when running OpenCode in the VSCode `JavaScript Debug Terminal`
With that said, you may want to try these methods, as they might work for you.
- Avoid having verbose LLM generated PR descriptions
- Before adding new functions or functionality, ensure that such behavior doesn't already exist elsewhere in the codebase.
### Style Preferences
These are not strictly enforced, they are just general guidelines:
- **Functions:** Keep logic within a single function unless breaking it out adds clear reuse or composition benefits.
- **Destructuring:** Do not do unnecessary destructuring of variables.
- **Control flow:** Avoid `else` statements.
- **Error handling:** Prefer `.catch(...)` instead of `try`/`catch` when possible.
- **Types:** Reach for precise types and avoid `any`.
- **Variables:** Stick to immutable patterns and avoid `let`.
- **Naming:** Choose concise single-word identifiers when they remain descriptive.
- **Runtime APIs:** Use Bun helpers such as `Bun.file()` when they fit the use case.
## Feature Requests
For net-new functionality, start with a design conversation. Open an issue describing the problem, your proposed approach (optional), and why it belongs in OpenCode. The core team will help decide whether it should move forward; please wait for that approval instead of opening a feature PR directly.
