{"version":1,"type":"story","url":"https://digestai.news/story/claude-code-introduces-mods-to-run-javascript-event-handlers-inside-th","json":"https://digestai.news/story/claude-code-introduces-mods-to-run-javascript-event-handlers-inside-th.json","markdown":"https://digestai.news/story/claude-code-introduces-mods-to-run-javascript-event-handlers-inside-th.md","slug":"claude-code-introduces-mods-to-run-javascript-event-handlers-inside-th","headline":"Claude Code introduces mods to run JavaScript event handlers inside the tool","summary":"**Claude Code mods** let users write JavaScript or TypeScript event handlers directly inside the tool, replacing older configuration-based hooks. The new system, announced in October, runs as plugins and can observe, rewrite, or block events like tool calls or prompt sends. Unlike hooks, which execute shell commands externally, mods operate internally, enabling features like custom UI elements, new commands, and shared variables between hooks—though the official documentation notes that validation does not guarantee correctness in stopping specific actions, as demonstrated by a test case where three of six deletion commands bypassed a mod’s restrictions despite identical outputs from a validation command.","keyPoints":["Claude Code mods let users write JavaScript/TypeScript event handlers inside the tool, replacing older configuration hooks","Mods can observe, rewrite, or block events like tool calls but do not guarantee perfect blocking—test cases show bypasses","Author retains 20 configuration hooks for blocking actions but may use mods for interactive features like banners or custom commands"],"whyItMatters":"Mods expand Claude Code’s customization beyond blocking actions to UI tweaks and automation, but their validation gaps and security risks require careful testing. For users relying on hooks, the shift may not be urgent—but it opens new possibilities for interactive workflows.","category":{"slug":"agents","name":"Agents & Tools","url":"https://digestai.news/category/agents"},"entities":{"companies":["Claude Code"],"models":[],"people":["numarn"]},"firstPublishedAt":"2026-10-13T20:00:00Z","updatedAt":"2026-10-13T20:00:00Z","sourceCount":1,"hasPrimarySource":false,"sources":[{"outlet":"note.com","title":"How to create Claude Code mods: The mechanism to stop AI in 3 files, and the line on whether to migrate existing hooks","url":"https://note.com/claudecodestudio/n/n3976a98bc56b?hl=en","publishedAt":"2026-10-13T20:00:00Z","type":"press","primary":false,"lead":true}],"sourceNotes":null,"discussions":[],"thread":null,"cite":{"text":"Digest AI, \"Claude Code introduces mods to run JavaScript event handlers inside the tool\", 13 October 2026, https://digestai.news/story/claude-code-introduces-mods-to-run-javascript-event-handlers-inside-th","publisher":"Digest AI","title":"Claude Code introduces mods to run JavaScript event handlers inside the tool","datePublished":"2026-10-13T20:00:00Z","url":"https://digestai.news/story/claude-code-introduces-mods-to-run-javascript-event-handlers-inside-th"},"generatedBy":"Written by Digest AI's editorial model from the linked sources; the sources are the record.","license":"Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse"}