Run OpenCode

import asyncio
import json

from boxlite import SimpleBox

API_KEY = "<YOUR_API_KEY>"                 # TODO: read from your own secret store
BASE_URL = "<YOUR_BASE_URL>/v1"            # must end at /v1 — see Troubleshooting
MODEL_ID = "<MODEL_ID>"

# OpenCode reads its entire configuration from this JSON string, so nothing is
# written into the image and the key never lands in a file inside the box.
CONFIG = json.dumps({
    "provider": {
        "custom": {
            "npm": "@ai-sdk/anthropic",
            "name": "Custom endpoint",
            "options": {"baseURL": BASE_URL, "apiKey": API_KEY},
            "models": {MODEL_ID: {"name": MODEL_ID}},
        }
    }
})


async def run(box, *cmd, env=None, timeout=None):
    result = await box.exec(*cmd, env=env, timeout=timeout)
    # exec does not raise on a non-zero exit — check it yourself
    if result.exit_code != 0:
        raise RuntimeError(f"`{' '.join(cmd)}` failed (exit={result.exit_code}): {result.stderr}")
    return result


async def main() -> None:
    try:
        async with SimpleBox(image="node:20-slim", memory_mib=2048, disk_size_gb=8) as box:
            await run(box, "npm", "install", "-g", "opencode-ai", timeout=600.0)
            version = await run(box, "opencode", "--version")
            print("opencode:", version.stdout.strip())

            answer = await run(
                box, "sh", "-c",
                f'opencode run "Write a one-line Python snippet that reverses a string." '
                f'-m custom/{MODEL_ID} < /dev/null',
                env={"OPENCODE_CONFIG_CONTENT": CONFIG},
                timeout=300.0,
            )
            print(answer.stdout)
    except RuntimeError as exc:
        print(f"runtime error: {exc}")


if __name__ == "__main__":
    asyncio.run(main())

opencode: 1.18.18
> build · <MODEL_ID>
def reverse(s: str) -> str: return s[::-1]

from boxlite import SimpleBox, Secret, NetworkSpec

box = SimpleBox(
    image="node:20-slim",
    disk_size_gb=8,
    secrets=[Secret(name="provider", value="<YOUR_API_KEY>", hosts=["<YOUR_HOST>"])],
    network=NetworkSpec(mode="enabled", allow_net=["registry.npmjs.org", "<YOUR_HOST>"]),
)

async with SimpleBox(image="node:20-slim", disk_size_gb=8, ports=[(4096, 4096)]) as box:
    await run(box, "npm", "install", "-g", "opencode-ai", timeout=600.0)
    await run(box, "sh", "-c", "nohup opencode serve > /tmp/opencode.log 2>&1 &")
    # Poll the forwarded port before sending work; exec returns as soon as the
    # command is launched and does not health-check the service for you.