标签 · Agentic Coding — Glean

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4picks · chronological

09-29

Claude Sonnet 5.5 launches with 70.6% on Terminal-Bench 4.0

Anthropic announced Claude Sonnet 5.5, the second model in the Claude 5.5 family, positioned as a faster and cheaper complement to Opus 5.5. It generates output 30%+ faster and costs up to 30% less per task than Sonnet 5. On Terminal-Bench 4.0 it scores 70.6% versus Sonnet 5's 10.3%; gains also show on FrontierCode, CursorBench, GDPval-AA and OSWorld 2.1, with some results near Opus 5.5. Token pricing is unchanged at $2 input / $10 output per million, with $0.20 cache reads, but fewer tokens are needed per task. It is the first Sonnet released with cybersecurity safeguards that fall back to Sonnet 5 for high-risk requests, plus anti-distillation classifiers and preserved thinking. Relevant to engineers choosing models and budgeting agentic coding.

www.anthropic.com · 10 min · Agentic Coding · Ai Safety · Anthropic

09-21

A Behavioral Guide to AI-Assisted Programming

A practitioner's behavioral guide to AI-assisted programming, deliberately tool-agnostic. Core claims: AI agents extend capability but bear no responsibility—humans remain the final owner of the code and should never commit what they cannot explain Feynman-style. Prefer collaboration over delegation; do not behave like a PM who only states requirements. Split PRs (under ~600 lines) and run an AI pre-review before opening one, since review cannot catch everything. Use plan mode to investigate before writing code. Prefer mature libraries over letting the model hand-roll utilities. Make changes verifiable and always verify. For junior engineers: quality over speed, participate in bug fixing instead of unsupervised delegation, design for a fixed 30 minutes before comparing with the AI's answer, read official docs, and shore up design patterns, DDD, security and concurrency.

www.piglei.com · 3 min · Agentic Coding · Agents · AI Engineering

09-20

How Anthropic scaled test impact analysis as agentic coding broke CI

Anthropic's CI absorbed a 25x increase in jobs over six months: Claude now writes 80% of the code, per-engineer quarterly output is 8x the 2021-2025 rate, and the test suite grew 10x while headcount barely moved. The bottleneck moved from writing code to PR review to CI, landing on the test impact analysis service that picks which tests run on each change. Because v0 needed a single writer to keep per-test history ordered, it ran as one process and could not be sharded. Three patches followed: doubling cores bought 70 days, per-package sharding 29 days, and daily restarts under a day. The rewrite moved history into an in-memory data store: any listener worker appends results to a journal and exits stateless, a small consumer rolls the journal into per-test history every few seconds, and the selector queries it. One engineer finished in three weeks.

claude.com · 10 min · Agentic Coding · CI/CD · Engineering Productivity

08-22

Introducing Delta: a multiplayer environment for coding with agents

Zed introduces Delta, a multiplayer environment for coding with agents, now in private beta. At its core is DeltaDB, which replicates both the conversation and the worktree in real time to every participant in a thread, while staying compatible with regular Git repositories. Every edit and conversation is captured between commits, so teammates who never open Delta still see a normal repo. Comments can anchor to any line of code and stay in place as the code evolves, connecting review to the conversation that produced it. The browser client is not a simplified port; it is the same Rust application compiled to WebAssembly and rendered through WebGL. Delta also integrates with third-party agent harnesses starting with Claude Code, syncing terminal sessions live into threads. The interface treats the conversation as an editable document, letting you place your cursor anywhere—on a diff line, a plan step, or a thinking block—and leave comments that the agent precisely understands. A product launch post with solid technical direction but limited hard data.

zed.dev · 7 min · Agent Tooling · Agentic Coding · Code Review