integrate-harness

Goal: produce a production-quality XAdapter extends BaseAgentAdapter with full test coverage and documentation, matching the level of the existing 11 adapters (claude, codex, cursor, gemini, opencode, openclaw, copilot, hermes, pi, omp, adapters-remote).

Checklist

1. Capability audit — read the harness's CLI docs. Fill in every AgentCapabilities field. Unknown? Set conservatively (false) and note in PR.
2. Create packages/adapters/src/<name>-adapter.ts extending BaseAgentAdapter. Required: agent, displayName, cliCommand, minVersion, hostEnvSignals, capabilities, models[], defaultModelId, configSchema, buildSpawnArgs, parseEvent, detectAuth, getAuthGuidance, sessionDir, parseSessionFile, listSessionFiles, readConfig, writeConfig.
3. Session parsing — if the harness stores JSONL sessions, delegate to parseJsonlSessionFile; otherwise write a custom parser and unit-test each event shape.
4. Hooks — if the harness supports native hooks, override writeNativeHook and mirror into HookConfigManager. If not, rely on the base class's virtual hooks.
5. Plugins — if it supports MCP servers under mcpServers in its config JSON, flip supportsPlugins: true, add pluginFormats: ['mcp-server'], and delegate to mcp-plugins.ts (see cursor/gemini/opencode/openclaw for the pattern).
6. Register — add to packages/adapters/src/index.ts exports and to the default registry in packages/core/src/client.ts (if applicable).
7. Tests — in packages/adapters/tests/<name>-adapter.test.ts:

• capability shape
• buildSpawnArgs for a few representative RunOptions
• parseEvent for each JSONL type the harness emits
• detectAuth for authenticated + unauthenticated states
• session file parsing from a real fixture (redacted)
• If plugins: add the adapter to mcp-plugins-parity.test.ts.

1. CLI audit test — ensure packages/cli/tests/commands-audit.test.ts passes (it exercises every adapter via the built CLI).
2. File-size limit — each source file must stay under 400 effective lines (local/max-file-lines). Split helpers into sibling modules if you're close.
3. Docs — add a row to the README capabilities matrix and a paragraph in docs/02-agents/<name>.md.
4. Changeset — npm run changeset, pick minor (new adapter), summarize.

Verification

bash
npm run typecheck
npm run lint
npm test
npx vitest run packages/adapters/tests/<name>-adapter.test.ts

All existing tests must continue to pass — no regressions in commands-audit.

Common pitfalls

• Forgetting to add the adapter to the default registry → commands-audit.test.ts won't exercise it.
• JSONL parsers that assume a single event per line — some harnesses emit arrays.
• Auth detection that reads env vars synchronously at construction time instead of detectAuth() — breaks testability.
• buildSpawnArgs returning the string "undefined" for missing options — always gate with if (options.X != null).
• Hook writers that overwrite rather than merge — use appendJsonHook or appendYamlHook.