Method execute

src/tools/REPLTool/pyReplFactory.tsx:309–346

(
    input: { code: string; timeoutMs: number },
    runtime: ReplWrapperRuntime,
  )

  }

  async execute(
    input: { code: string; timeoutMs: number },
    runtime: ReplWrapperRuntime,
  ): Promise<{ output: string; error?: string }> {
    return this.runExclusive(async () => {
      await this.ensureStarted()
      const child = this.child
      if (!child?.stdin.writable) {
        throw new Error('Python REPL kernel stdin is not writable')
      }

      const execId = randomUUID()
      const pending = await new Promise<PythonKernelExecResultMessage>((resolve, reject) => {
        this.pendingExecs.set(execId, { resolve, reject, runtime })
        child.stdin.write(
          `${JSON.stringify({
            type: 'exec',
            id: execId,
            code: input.code,
            timeout_ms: input.timeoutMs,
          })}\n`,
        )
      }).finally(() => {
        this.pendingExecs.delete(execId)
      })

      if (!pending.ok) {
        return {
          output: pending.output,
          error: pending.error ?? 'Python REPL execution failed',
        }
      }

      return {
        output: pending.output,
      }
    })
  }

  async reset(): Promise<void> {
    await this.runExclusive(async () => {