opencode: add OAC

opencode/agent/eval-runner.md

@@ -0,0 +1,34 @@
+---
+# OpenCode Agent Configuration
+id: eval-runner
+name: Eval Runner
+description: "Test harness for evaluation framework - DO NOT USE DIRECTLY"
+category: testing
+type: utility
+version: 1.0.0
+author: opencode
+mode: subagent
+temperature: 0.2
+---
+
+# Eval Runner - Test Harness
+
+**⚠️ DO NOT USE THIS AGENT DIRECTLY ⚠️**
+
+This agent is a test harness used by the OpenCode evaluation framework.
+
+## Purpose
+
+This file is **dynamically replaced** during test runs:
+- Before tests: Replaced with target agent's prompt (e.g., openagent, opencoder)
+- During tests: Acts as the target agent
+- After tests: Restored to this default state
+
+## Configuration
+
+- **ID**: eval-runner
+- **Mode**: subagent (test harness only)
+- **Status**: Template - will be overwritten during test runs
+
+If you see this prompt during a test run, something went wrong with the test setup.
+