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Wed, October 2121:04ToolsModel releasesMCP & SkillsAI codingModel releases guide

Claude Mods released: handing Claude Code's interface layer to user-modified code

Decision Brief

What changedLatent Space introduces Claude Mods, a plugin mechanism using TypeScript or JavaScript functions to intercept prompts, tool calls, and render events in Claude Code, letting users customize the interface and behavior.
Why it mattersMods turn Claude Code's execution and rendering flow into interceptable middleware, letting developers customize when they get interrupted and what they see to match their attention habits—at the cost of mods running with user privileges and without sandbox isolation.
Who should careAI coding tool users
Affected stackClaude Code
Builder actionUpdate Claude Code to the latest version
Source confidenceMedium · Reliable media or first-hand reporting

Claude Mods is a plugin format for Claude Code: composed of TypeScript or JavaScript functions running inside Claude Code, it responds to events such as prompts, tool calls, and interface rendering, and can observe events, rewrite render output, or fully take over default behavior—essentially middleware for the agent harness. Anthropic ships 6 built-in mods, including agents-md, diff, plugin-authoring, sec-default, telemetry, and the default-off you-should-know. Claude Code includes a skill for writing mods, so users can describe their needs in natural language and have Claude generate one.

Summary basis: full article readCompiled from the source scope noted above; the original remains authoritative.

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