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https://github.com/harivansh-afk/sandbox-agent.git
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82 lines
3.2 KiB
Markdown
82 lines
3.2 KiB
Markdown
# OpenCode Web Customization & Local Run Notes
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## Local Web UI (pointing at `/opencode`)
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This uses the OpenCode web app from `~/misc/opencode/packages/app` and points it at the
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Sandbox Agent OpenCode-compatible API. The OpenCode JS SDK emits **absolute** paths
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(`"/global/event"`, `"/session/:id/message"`, etc.), so any base URL path is discarded.
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To keep the UI working, sandbox-agent now exposes the OpenCode router at both
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`/opencode/*` and the root (`/global/*`, `/session/*`, ...).
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### 1) Start sandbox-agent (OpenCode compat)
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```bash
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cd /home/nathan/sandbox-agent.feat-opencode-compat
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SANDBOX_AGENT_SKIP_INSPECTOR=1 SANDBOX_AGENT_LOG_STDOUT=1 \
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./target/debug/sandbox-agent server --no-token --host 127.0.0.1 --port 2468 \
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--cors-allow-origin http://127.0.0.1:5173 \
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> /tmp/sandbox-agent-opencode.log 2>&1 &
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```
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Logs:
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```bash
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tail -f /tmp/sandbox-agent-opencode.log
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```
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### 2) Start OpenCode web app (dev)
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```bash
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cd /home/nathan/misc/opencode/packages/app
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VITE_OPENCODE_SERVER_HOST=127.0.0.1 VITE_OPENCODE_SERVER_PORT=2468 \
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/home/nathan/.bun/bin/bun run dev -- --host 127.0.0.1 --port 5173 \
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> /tmp/opencode-web.log 2>&1 &
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```
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Logs:
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```bash
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tail -f /tmp/opencode-web.log
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```
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### 3) Open the UI
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```
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http://127.0.0.1:5173/
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```
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The app should connect to `http://127.0.0.1:2468` by default in dev (via
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`VITE_OPENCODE_SERVER_HOST/PORT`). If you see a “Could not connect to server”
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error, verify the sandbox-agent process is running and reachable on port 2468.
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### Notes
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- The web UI uses `VITE_OPENCODE_SERVER_HOST` and `VITE_OPENCODE_SERVER_PORT` to
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pick the OpenCode server in dev mode (see `packages/app/src/app.tsx`).
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- When running in production, the app defaults to `window.location.origin` for
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the server URL. If you need a different target, you must configure it via the
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in-app “Switch server” dialog or change the build config.
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- If you see a connect error in the web app, check CORS. By default, sandbox-agent
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allows no origins. You must pass `--cors-allow-origin` for the dev server URL.
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- The OpenCode provider list now exposes a `sandbox-agent` provider with models
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for each agent (defaulting to `mock`). Use the provider/model selector in the UI
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to pick the backing agent instead of environment variables.
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## Dev Server Learnings (Feb 4, 2026)
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- The browser **cannot** reach `http://127.0.0.1:2468` unless the web UI is on the
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same machine. If the UI is loaded from `http://100.94.102.49:5173`, the server
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must be reachable at `http://100.94.102.49:2468`.
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- The OpenCode JS SDK uses absolute paths, so a base URL path (like
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`http://host:port/opencode`) is ignored. This means the server must expose
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OpenCode routes at the **root** (`/global/*`, `/session/*`, ...), even if it
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also exposes them under `/opencode/*`.
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- CORS must allow the UI origin. Example:
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```bash
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./target/debug/sandbox-agent server --no-token --host 0.0.0.0 --port 2468 \
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--cors-allow-origin http://100.94.102.49:5173
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```
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- Binding the dev servers to `0.0.0.0` is required for remote access. Verify
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`ss -ltnp | grep ':2468'` and `ss -ltnp | grep ':5173'`.
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- If the UI throws “No default model found”, it usually means the `/provider`
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response lacks a providerID → modelID default mapping for a connected provider.
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