Class ClaudeRunner

evals/buffbench/runners/claude.ts:9–176

} from '@codebuff/common/types/print-mode'

export class ClaudeRunner implements Runner {
  private cwd: string
  private env: Record<string, string>

  constructor(cwd: string, env: Record<string, string> = {}) {
    this.cwd = cwd
    this.env = env
  }

  async run(prompt: string): Promise<RunnerResult> {
    const steps: AgentStep[] = []
    let totalCostUsd = 0

    return new Promise((resolve, reject) => {
      const args = [
        '-p',
        prompt,
        '--output-format',
        'stream-json',
        '--verbose',
        '--dangerously-skip-permissions',
        '--model',
        'claude-opus-4-5-20251101',
      ]

      console.log(`[ClaudeRunner] Running: claude ${args.join(' ')}`)

      const child = spawn('claude', args, {
        cwd: this.cwd,
        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'],
      })

      let _stdout = ''
      let stderr = ''
      let responseText = ''
      let toolCalls: PrintModeToolCall[] = []
      let toolResults: PrintModeToolResult[] = []

      function flushStep() {
        if (responseText.length > 0) {
          steps.push({ type: 'text', text: responseText })
        }
        for (const call of toolCalls) {
          steps.push(call)
        }
        for (const result of toolResults) {
          steps.push(result)
        }
        responseText = ''
        toolCalls = []