Timeline
Released version 2.1.221 with credential masking, VSCode Focus view, and 20 security fixes
Claude Code shifts to a policy-controlled execution layer with deterministic security workflows
Open-source plugin 'dont-let-me' released for Claude Code, Codex, and OpenCode
Claude Code skills feature introduced, allowing reusable instruction packs in ~/.claude/skills/
Claude Code now ships with Plan mode as a first-class safety rail for cross-file refactors
Claude Code's Plan mode introduced as a safety rail for cross-
Released v0.2.86 update with getContextUsage() method and seed_read_state improvements
Ecosystem
Claude Agent SDK TypeScript
No mapped relationships
Claude Code
Benchmarks
Evidence (4 articles)
Anthropic Ejects Programmatic Claude Use From Pro Subscriptions
May 14, 2026Claude Code v2.1.86 Fixes /compact Failures, Adds Context Usage Tracking
Mar 25, 2026Claude Agent SDK's a2a Tool Lets You Build Persistent, Observable AI Assistants
Apr 6, 2026Transform Your CLAUDE.md from a Note to a Multi-Agent Command Center
Mar 28, 2026