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The Claude Code Changelog · Friday · 3 min

Claude Code 2.1.287: Mods, Security Risks, and New Guardrails

We break down the new Claude Mods system in Claude Code 2.1.287, including how in-process TypeScript hooks differ from classic JSON hooks, what the built-in You should know mod does, and why security teams are urging caution. Plus: validation tips for third-party mods, team guardrails, 1M context defaults, VS Code updates, and an MCP fix for sign-in prompt changes.

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We break down the new Claude Mods system in Claude Code 2.1.287, including how in-process TypeScript hooks differ from classic JSON hooks, what the built-in You should know mod does, and why security teams are urging caution.

Plus: validation tips for third-party mods, team guardrails, 1M context defaults, VS Code updates, and an MCP fix for sign-in prompt changes.

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