feat(ci): add GH Models default target with copilot-cli/copilot-sdk

Update .agentv/targets.yaml:
- Change default target to GitHub Models (openai provider, models.github.ai)
- Add copilot-cli and copilot-sdk targets using GH_MODELS_MODEL
- Keep existing pi, codex, gemini, openai, openrouter targets

Update evals workflow:
- Restore Copilot CLI install step
- Write .env with GH_MODELS_TOKEN/GH_MODELS_MODEL (targets.yaml references these)
- Remove inline targets.yaml generation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: christso

.agentv/targets.yaml

@@ -3,12 +3,22 @@
 
 targets:
   - name: default
-    provider: pi-coding-agent
-    subprovider: openrouter
-    model: z-ai/glm-4.7
-    api_key: ${{ OPENROUTER_API_KEY }}
-    system_prompt: "Answer directly based on the information provided."
-    grader_target: gemini-flash
+    provider: openai
+    base_url: https://models.github.ai/inference
+    api_key: ${{ GH_MODELS_TOKEN }}
+    model: ${{ GH_MODELS_MODEL }}
+
+  - name: copilot-cli
+    provider: copilot-cli
+    model: ${{ GH_MODELS_MODEL }}
+    grader_target: default
+    log_format: json
+
+  - name: copilot-sdk
+    provider: copilot-sdk
+    model: ${{ GH_MODELS_MODEL }}
+    grader_target: default
+    log_format: json
 
   - name: pi-cli
     provider: pi-cli

.github/workflows/evals.yml

@@ -23,22 +23,15 @@ jobs:
       - name: Build
         run: bun run build
 
-      - name: Configure targets
-        run: |
-          mkdir -p .agentv
-          cat > .agentv/targets.yaml <<'TARGETS'
-          targets:
-            - name: default
-              provider: openai
-              base_url: https://models.github.ai/inference
-              api_key: ${{ GH_MODELS_TOKEN }}
-              model: ${{ GH_MODELS_MODEL }}
-          TARGETS
+      - name: Install GitHub Copilot CLI
+        run: curl -fsSL https://gh.io/copilot-install | bash
 
-          cat > .env <<ENV
+      - name: Configure credentials
+        run: |
+          cat > .env <<EOF
           GH_MODELS_TOKEN=${{ secrets.GH_MODELS_TOKEN || secrets.GITHUB_TOKEN }}
           GH_MODELS_MODEL=${{ vars.GH_MODELS_MODEL || 'openai/gpt-5-mini' }}
-          ENV
+          EOF
 
       - name: Resolve filter and threshold
         id: filter
@@ -48,6 +41,9 @@ jobs:
 
       - name: Run AgentV evals
         id: run-evals
+        env:
+          COPILOT_GITHUB_TOKEN: ${{ secrets.COPILOT_PAT }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           mkdir -p .agentv/ci-results