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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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6 pages for messagedisplay.

Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it.

Intercept and control agent behavior with hooks Claude Code CLI · in the page agent-sdk/hooks …| | `MessageDisplay` | No | Yes | An assistant message with text completes, on… Agent SDK reference - TypeScript Claude Code CLI · in the page agent-sdk/typescript …ove" | "InstructionsLoaded" | "CwdChanged" | "FileChanged" | "MessageDisplay"; ``` ### `HookCallback` Hook callback function type. ```typescript theme={null} type HookCallback = ( input:… Hooks reference Claude Code CLI · in the page hooks …nged, FileChanged, and DirectoryAdded as standalone async events, and MessageDisplay as a display-only event that runs while assistant message text streams" width="520" height="1228" data-path="images… Automate actions with hooks Claude Code CLI · in the page hooks-guide …| | `MessageDisplay` | While assistant message text is displayed… Plugins reference Claude Code CLI · in the page plugins-reference …| | `MessageDisplay` | While assistant message text is displayed… Week 22 · May 25–29, 2026 Claude Code CLI · in the page whats-new/2026-w22 …ols from the model while the skill is active</div> <div>New <code>MessageDisplay</code> hook event lets hooks transform or hide assistant message text as it is displayed</div> <div>Claude Code…