Wire up OpenCode

Edit opencode.jsonc

Open ~/.config/opencode/opencode.jsonc (Windows: %AppData%\opencode\opencode.jsonc). For each provider you want compressed:
```
{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "openai": {
      "options": {
        "baseURL": "http://127.0.0.1:17322",
        "headers": {
          "cmx-provider": "openai",
          "cmx-harness": "opencode"
        }
      }
    }
  }
}
```
Copy the same options block into any other provider entry (moonshotai, github-copilot, …) — just change cmx-provider to match the provider key.

If you use "compaction" in OpenCode, leave its pruning off ("prune": false) — cmx handles history reduction at the gateway, and the two are redundant.
Make sure the provider exists in cmx config

~/.config/cmx/config.json:
```
{
  "providers": {
    "openai": { "base_url": "https://api.openai.com/v1" }
  }
}
```
openai, anthropic, openrouter, groq, deepseek, moonshot and zai are preconfigured. Add your own with any OpenAI-compatible or Anthropic-compatible base URL.
Restart and verify
Terminal window
```
cmx restart     # pick up config changes
```
Start a session in OpenCode, then:
Terminal window
```
cmx status      # should show your provider + session
```
Sessions are attributed via OpenCode’s session header; each one gets its own ledger, summaries and stats in the dashboard.

Claude Code / other harnesses

See Other harnesses — the pattern is identical: point baseURL at the gateway, send the two cmx-* headers, optionally add a session ID header so requests group into sessions.