Claude Agent Teams Build Linux-Compatible C Compiler

Nicholas Carlini, a researcher on a Safeguards team, reports that he tasked 16 Claude instances to develop a Rust-based C compiler capable of building Linux 6.9 on x86, ARM, and RISC-V. Over nearly 2,000 Claude Code sessions and about $20,000 in API costs, the agents produced a roughly 100,000-line compiler; Carlini emphasizes harness design, testing, and parallel coordination lessons for long-running autonomous agent teams.
Key Points
- 1Built a 100,000-line Rust-based C compiler via 16 parallel Claude agents, compiling Linux 6.9.
- 2Demonstrated sustained autonomous progress across ~2,000 sessions and $20,000 API costs, highlighting scalability.
- 3Recommend high-quality tests, simple git-based locks, and sampling to manage long-running agent teams.
Scoring Rationale
Strong empirical demonstration with practical harness techniques, limited by a single-team prototype and lack of peer review.
Sources
Public references used for this report.
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