Update default model in Codex engine to o4-mini and adjust test expectations

.github/workflows/agentics/shared/job-summary.md

@@ -11,7 +11,7 @@ tools:
 
 ### Output Report implemented via GitHub Action Job Summary
 
-You will use the Job Summary for GitHub Actions run ${{ github.run_id }} in ${{ github.repository }} to report progess. This means writing to the special file $GITHUB_STEP_SUMMARY. You can write the file using "echo" or the "Write" tool. GITHUB_STEP_SUMMARY is an environment variable set by GitHub Actions which you can use to write the report. You can read this environment variable using the bash command "echo $GITHUB_STEP_SUMMARY".
+You will use the Job Summary for GitHub Actions run ${{ github.run_id }} in ${{ github.repository }} to report progess. This means writing to the special file that is stored in the environment variable GITHUB_STEP_SUMMARY. You can write the file using "echo" or the "Write" tool. GITHUB_STEP_SUMMARY is an environment variable set by GitHub Actions which you can use to write the report. You can read this environment variable using the bash command "echo $GITHUB_STEP_SUMMARY".
 
 At the end of the workflow, finalize the job summry with a very, very succinct summary in note form of 
   - the steps you took

pkg/workflow/codex_engine.go

@@ -44,8 +44,8 @@ func (e *CodexEngine) GetInstallationSteps(engineConfig *EngineConfig) []GitHubA
 }
 
 func (e *CodexEngine) GetExecutionConfig(workflowName string, logFile string, engineConfig *EngineConfig) ExecutionConfig {
-	// Use model from engineConfig if available, otherwise default to gpt-4o
-	model := "gpt-4o"
+	// Use model from engineConfig if available, otherwise default to o4-mini
+	model := "o4-mini"
 	if engineConfig != nil && engineConfig.Model != "" {
 		model = engineConfig.Model
 	}
@@ -59,13 +59,14 @@ mkdir -p /tmp/aw-logs
 # Run codex with log capture
 codex exec \
   -c model=%s \
-  --full-auto "$INSTRUCTION" 2>&1 | tee /tmp/aw-logs/%s.log`, model, logFile)
+  --full-auto "$INSTRUCTION" 2>&1 | tee %s`, model, logFile)
 
 	return ExecutionConfig{
 		StepName: "Run Codex",
 		Command:  command,
 		Environment: map[string]string{
-			"OPENAI_API_KEY": "${{ secrets.OPENAI_API_KEY }}",
+			"OPENAI_API_KEY":      "${{ secrets.OPENAI_API_KEY }}",
+			"GITHUB_STEP_SUMMARY": "${{ env.GITHUB_STEP_SUMMARY }}",
 		},
 	}
 }

pkg/workflow/codex_engine_test.go

@@ -60,7 +60,7 @@ func TestCodexEngine(t *testing.T) {
 		t.Errorf("Expected command to contain 'codex exec', got '%s'", config.Command)
 	}
 
-	if !strings.Contains(config.Command, "test-log.log") {
+	if !strings.Contains(config.Command, "test-log") {
 		t.Errorf("Expected command to contain log file name, got '%s'", config.Command)
 	}
 

pkg/workflow/codex_test.go

@@ -122,8 +122,8 @@ This is a test workflow.
 					t.Errorf("Expected lock file to contain 'codex exec' command but it didn't.\nContent:\n%s", lockContent)
 				}
 				// Check for correct model based on AI setting
-				if !strings.Contains(lockContent, "model=gpt-4o") {
-					t.Errorf("Expected lock file to contain 'model=gpt-4o' for codex but it didn't.\nContent:\n%s", lockContent)
+				if !strings.Contains(lockContent, "model=o4-mini") {
+					t.Errorf("Expected lock file to contain 'model=o4-mini' for codex but it didn't.\nContent:\n%s", lockContent)
 				}
 				if !strings.Contains(lockContent, "OPENAI_API_KEY") {
 					t.Errorf("Expected lock file to contain 'OPENAI_API_KEY' for codex but it didn't.\nContent:\n%s", lockContent)