Claude Agent Loop with Multi-Step Tool Calling

Phone ScreenAnthropicLast reported August 2026Low Frequency
Reported
3× across candidate reports
First seen
September 2025
Last reported
August 2026
Reported outcome
mixed

Problem Overview

The round: Anthropic's "Agents/Coding" interview, 55 minutes. A September 2025 thread quotes the portal as "A 55-minute coding on prompting and engineering with LLMs in Colab", on Google Meet. The brief, as another 2025 report quotes it: "This interview will test writing code with LLMs as a building block, and…

  • 3 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
  • The rest of the problem statement — full requirements, constraints, and edge cases
  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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Verified Source
Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.
Codex Fact-Checked
Technical claims, formulas, and scale numbers are reviewed against primary sources.
Interviewer Follow-ups
The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.
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