10 pages for userpromptsubmit.

How the agent loop works Claude Code CLI · in the page agent-sdk/agent-loop …urns | Audit outputs, trigger side effects | | `UserPromptSubmit` | When a prompt is sent | Inject additional context into prompts | | `Stop`… Intercept and control agent behavior with hooks Claude Code CLI · in the page agent-sdk/hooks …| | `UserPromptSubmit` | Yes | Yes | User prompt submission… Agent SDK reference - Python Claude Code CLI · in the page agent-sdk/python …"PostToolUseFailure", # Called when a tool execution fails "UserPromptSubmit", # Called when user submits a prompt "Stop", # Called when stopping execution "SubagentStop", # Calle… Agent SDK reference - TypeScript Claude Code CLI · in the page agent-sdk/typescript …by the loop. Carries non-error status lines, hook feedback such as a `UserPromptSubmit` hook's block reason, and command output. On Claude Code v2.1.227 or later, a hook's [`systemMessage`](/docs/en/h… Hooks reference Claude Code CLI · in the page hooks …* once per session: `SessionStart` and `SessionEnd` * once per turn: `UserPromptSubmit`, `Stop`, and `StopFailure` * on every tool call inside the agentic loop: `PreToolUse` and `PostToolUse`, except… Automate actions with hooks Claude Code CLI · in the page hooks-guide …| | `UserPromptSubmit` | When you submit a prompt, before Claude processes it… Interactive mode Claude Code CLI · in the page interactive-mode …-options` keeps counting down. * **The continuation is blocked**: a [`UserPromptSubmit` hook](/docs/en/hooks#userpromptsubmit) that blocks the continuation prompt, or a failure before it reaches the m… Plugins reference Claude Code CLI · in the page plugins-reference …| | `UserPromptSubmit` | When you submit a prompt, before Claude processes it… Catch security issues as Claude writes code Claude Code CLI · in the page security-guidance …he plugin's Python environment | | `UserPromptSubmit` | Capture the working-tree baseline that the end-of-turn review di… Week 15 · April 6–10, 2026 Claude Code CLI · in the page whats-new/2026-w15 …ects, and compound commands now prompt correctly</div> <div><code>UserPromptSubmit</code> hooks can set the session title via <code>hookSpecificOutput.sessionTitle</code></div> </div> </div> [F…