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// 55d agoPRODUCT UPDATE
Claude Code v2.1.89-90 adds deferred hooks, hardens PowerShell
Anthropic’s terminal coding agent gets a meaningful two-release update: v2.1.89 adds deferred hook permissions for headless sessions along with better permission and resume handling, while v2.1.90 tightens PowerShell checks, fixes headless and resume regressions, and improves memory, SSE streaming, and long-session performance.
// ANALYSIS
Strong release for teams using Claude Code in real terminal and CI-like workflows.
- –The `"defer"` permission flow is the most important change because it makes paused headless tool calls resumable instead of brittle.
- –PowerShell hardening stands out as the security fix set, closing several Windows-specific permission bypass and parsing edge cases.
- –The performance work is practical rather than flashy: it targets memory growth, transcript writes, and large streamed frames, which are exactly where agentic CLI tools tend to degrade.
- –`/powerup` is useful onboarding, but the release’s real value is operational reliability and safer execution.
// TAGS
claude-codeanthropicterminalcoding agentpermissionspowershellsecurityperformancerelease notes
DISCOVERED
55d ago
2026-04-02
PUBLISHED
55d ago
2026-04-02
RELEVANCE
10/ 10
AUTHOR
DIY Smart Code