Revert "Update agent runners to use the appropriate key"

This reverts commit 5d7e5cb.

Author: jahooma

evals/buffbench/agent-runner.ts

@@ -70,16 +70,11 @@ export async function runAgentOnCommit({
         },
         async (repoDir) => {
           // Select the appropriate runner
-          const updatedEnv = { ...env }
           let runner: Runner
           if (externalAgentType === 'claude') {
-            if (process.env.ANTHROPIC_API_KEY)
-              updatedEnv['ANTHROPIC_API_KEY'] = process.env.ANTHROPIC_API_KEY
-            runner = new ClaudeRunner(repoDir, updatedEnv)
+            runner = new ClaudeRunner(repoDir, env)
           } else if (externalAgentType === 'codex') {
-            if (process.env.OPENAI_API_KEY)
-              updatedEnv['OPENAI_API_KEY'] = process.env.OPENAI_API_KEY
-            runner = new CodexRunner(repoDir, updatedEnv)
+            runner = new CodexRunner(repoDir, env)
           } else {
             runner = new CodebuffRunner({
               cwd: repoDir,

evals/buffbench/runners/claude.ts

@@ -38,6 +38,9 @@ export class ClaudeRunner implements Runner {
         env: {
           ...process.env,
           ...this.env,
+          // Ensure ANTHROPIC_API_KEY is set from CLAUDE_CODE_KEY if available
+          ANTHROPIC_API_KEY:
+            process.env.CLAUDE_CODE_KEY || process.env.ANTHROPIC_API_KEY,
         },
         // Use 'ignore' for stdin to prevent the CLI from waiting for input
         stdio: ['ignore', 'pipe', 'pipe'],