#ai-coding-agents

JetBrains reports 83% faster, 64% cheaper and 63% fewer tool calls for its refactoring skill. The disclosure is unusually good; the scope is one harness.

On August 19 Cursor's cloud agents gained PR subscriptions, goals and per-task VMs, and Codex cloud added GitLab in beta. Agents now persist past one prompt.

Claude Code shipped four tagged releases in roughly 50 hours, one switching a tool family off by default, reversibly. Running a team on a shifting harness.

Anthropic flips Claude Code to auto mode by default on Pro, Max and Team plans from August 14. What changes, what to pin, and what the studies show.

Three terminal coding agents, three different bets. How Muse Code, Claude Code and Codex CLI compare on subagents, sandboxing, pricing and published scores.

Cursor 3.11 adds durable parallel side chats, local search across your agent transcript history, and new cloud-agent hooks. What changes for teams.

A single fake Sentry error hijacks Claude Code, Cursor, and Codex at ~85% success via MCP — no breach needed. The attack explained, plus five defenses.

OpenAI is acquiring Ona to give Codex persistent cloud environments for hours-to-days agent tasks. What it means for the build-vs-buy sandbox decision.

Claude Fable 5 & Mythos 5 as an agentic coding model, read from the system card: the real coding benchmarks, the candid failure modes, and how to oversee it.

Gemini CLI stops serving Pro, Ultra, and free users on June 18, 2026. The 45-minute migration to Antigravity CLI, the silent failures, and the quota regression.

Amazon Q Developer free tier closes May 15, 2026. Step-by-step migration playbook to Kiro with spec-driven development, hooks, and steering rules.

xAI launched Grok Build early beta on May 14, 2026 — CLI coding agent with parallel sub-agents on SuperGrok Heavy ($99/mo intro, $300 list).

Five-way comparison — Claude Code, Cursor, Codex Desktop, Replit Agent 3, Devin. Pricing, agent autonomy, MCP, eval scores, and reference workloads.

OpenAI Codex Desktop v26.415 shipped April 16 with background computer use and 90+ plugins. Figma, Notion, GitHub. Benchmark head-to-head vs Claude Code.