Mistral's post-mortem on migrating 40k lines of Fortran 77 to C++ with AI agents

Mistral 用 AI 智能体迁移 4 万行 Fortran 77 到 C++ 的经验复盘

Mistral published an engineering post-mortem on using their own AI agents to migrate a 40k-line Fortran 77 codebase to C++. The piece focuses on three hard parts: getting agents to understand undocumented legacy logic, preserving numerical precision after translation, and designing a verification pipeline to catch bugs. The post doesn't disclose which model was used, total time spent, or how many manual fixes were needed. Treat this as a methodology reference, not a product launch.

Why it matters: Mistral published a real engineering retrospective on using their own AI agents for a legacy migration, with concrete breakdowns of three hard problems — not a product launch fluff piece. Score held back because the post doesn't disclose which model, total time spent, or how m...