{"id":"nr-rewriting-whole-legacy-codebases-has-become-a-job-for-a-small-team-wit-68edd8","slug":"rewriting-whole-legacy-codebases-has-become-a-job-for-a-small-team-wit-68edd8","type":"raw_signal","title":"Rewriting whole legacy codebases has become a job for a small team with agents","description":"An Antigravity agent moved the core of a 174,000-line Fortran ocean model to memory-safe Rust in a 59-minute run.","observed_at":"2026-11-04","record_date":"2026-11-04","date_kind":"observed_at","novelty":"notable","source_platform":"newruntime.com","topics":["google","gemini"],"entities":["Google","Google Antigravity","Gemini 4 Argon","FVCOM","Dan Gruhl","Prashant Nair","Microsoft","Copilot Cowork","Work IQ","Bas Brekelmans"],"related_patterns":["harness-architecture-outlives-model-choice","agent-security-moves-to-runtime-boundaries","verification-bandwidth-is-the-scarce-resource"],"source_url":"https://antigravity.google/blog/modernizing-40-year-old-scientific-code-with-gemini-4-argon","source_urls":["https://antigravity.google/blog/modernizing-40-year-old-scientific-code-with-gemini-4-argon","https://commandline.microsoft.com/how-we-built-copilot-cowork-python-to-rust-migration","https://finance.yahoo.com/technology/articles/cisco-chief-found-27-old-070000750.html"],"why_it_matters":"An Antigravity agent moved the core of a 174,000-line Fortran ocean model to memory-safe Rust in a 59-minute run. Microsoft's nine-engineer Copilot Cowork team migrated a live product from Python to Rust. Cisco is testing whether a two-person team can refactor most of its legacy code. Modernization projects that used to need large teams are now being planned at agent scale, which makes verifying the migrated code the real cost.","verification_level":"source-linked","signal_type":"synthesis","synthesis_of":[{"slug":"modernizing-40-year-old-scientific-code-with-gemini-e59cbf","title":"Modernizing 40-year-old scientific code with Gemini 4 Argon","url":"https://newruntime.com/posts/modernizing-40-year-old-scientific-code-with-gemini-e59cbf/"},{"slug":"lessons-from-building-copilot-cowork-21-minute-read-01943f","title":"Lessons from building Copilot Cowork","url":"https://newruntime.com/posts/lessons-from-building-copilot-cowork-21-minute-read-01943f/"},{"slug":"cisco-president-jeetu-patel-says-a-27-year-a7672e","title":"Cisco president Jeetu Patel says a 27-year-old engineer is testing whether a two-person team can use AI to","url":"https://newruntime.com/posts/cisco-president-jeetu-patel-says-a-27-year-a7672e/"}],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"signal:rewriting-whole-legacy-codebases-has-become-a-job-for-a-small-team-wit-68edd8","retrieval_nugget":"An Antigravity agent moved the core of a 174,000-line Fortran ocean model to memory-safe Rust in a 59-minute run. Microsoft's nine-engineer Copilot Cowork team migrated a live product from Python to Rust.","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/signals/rewriting-whole-legacy-codebases-has-become-a-job-for-a-small-team-wit-68edd8/","markdown":"https://newruntime.com/signals/rewriting-whole-legacy-codebases-has-become-a-job-for-a-small-team-wit-68edd8.md","json":"https://newruntime.com/signals/rewriting-whole-legacy-codebases-has-become-a-job-for-a-small-team-wit-68edd8.json"},"updated_at":"2026-11-06","next_reads":[{"type":"topic","path":"/topics/google/","url":"https://newruntime.com/topics/google/","title":"Google","reason":"Explore the google topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/google.md","json_url":"https://newruntime.com/topics/google.json"},{"type":"topic","path":"/topics/gemini/","url":"https://newruntime.com/topics/gemini/","title":"Gemini","reason":"Explore the gemini topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/gemini.md","json_url":"https://newruntime.com/topics/gemini.json"},{"type":"collection","path":"/signals/","url":"https://newruntime.com/signals/","title":"Signals","reason":"Open the signals and the raw-signal archive.","media_type":"text/html","json_url":"https://newruntime.com/signals.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}
