Documentation 2026-08-28 23:59 UTC to 2026-08-29 18:58 UTC

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29 <img src="https://mintcdn.com/claude-code/jhXrDR5TrSZ5hgXM/images/hooks-lifecycle.svg?fit=max&auto=format&n=jhXrDR5TrSZ5hgXM&q=85&s=3ca47113d5956460e6e4611b8dbc63b7" alt="Diagramma del ciclo di vita dei hook che mostra Setup facoltativo che alimenta SessionStart, quindi un ciclo per turno contenente UserPromptSubmit, UserPromptExpansion per slash commands, il ciclo agentico annidato (PreToolUse, PermissionRequest, PostToolUse, PostToolUseFailure, PostToolBatch, SubagentStart/Stop, TaskCreated, TaskCompleted), e Stop o StopFailure, seguito da TeammateIdle, PreCompact, PostCompact e SessionEnd, con Elicitation e ElicitationResult annidati all'interno dell'esecuzione dello strumento MCP, PermissionDenied come ramo laterale di PermissionRequest per i rifiuti in modalità automatica, WorktreeCreate, WorktreeRemove, Notification, ConfigChange, InstructionsLoaded, CwdChanged e FileChanged come eventi asincroni autonomi, e MessageDisplay come evento di sola visualizzazione che viene eseguito mentre il testo del messaggio dell'assistente viene trasmesso in streaming" width="520" height="1228" data-path="images/hooks-lifecycle.svg" />29 <img src="https://mintcdn.com/claude-code/x7pO8l4XcvAXCoVc/images/hooks-lifecycle.svg?fit=max&auto=format&n=x7pO8l4XcvAXCoVc&q=85&s=81b9256c1bbe8832553485f5d9e9c746" alt="Diagramma del ciclo di vita dei hook che mostra Setup facoltativo che alimenta SessionStart, quindi un ciclo per turno contenente UserPromptSubmit, UserPromptExpansion per slash commands, il ciclo agentico annidato (PreToolUse, PermissionRequest, PostToolUse, PostToolUseFailure, PostToolBatch, SubagentStart/Stop, TaskCreated, TaskCompleted), e Stop o StopFailure, seguito da TeammateIdle, PreCompact, PostCompact e SessionEnd, con Elicitation e ElicitationResult annidati all'interno dell'esecuzione dello strumento MCP, PermissionDenied come ramo laterale di PermissionRequest per i rifiuti in modalità automatica, WorktreeCreate, WorktreeRemove, Notification, ConfigChange, InstructionsLoaded, CwdChanged e FileChanged come eventi asincroni autonomi, e MessageDisplay come evento di sola visualizzazione che viene eseguito mentre il testo del messaggio dell'assistente viene trasmesso in streaming" width="520" height="1336" data-path="images/hooks-lifecycle.svg" />

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62| `WorktreeRemove` | When a worktree is being removed at session exit, when a subagent finishes, or when you delete a background session |62| `WorktreeRemove` | When a worktree is being removed at session exit, when a subagent finishes, or when you delete a background session |

63| `PreCompact` | Before context compaction |63| `PreCompact` | Before context compaction |

64| `PostCompact` | After context compaction completes |64| `PostCompact` | After context compaction completes |

65| `PreModelSwitch` | Before Claude Code applies a model switch that you or a client requested. Can block the switch |

66| `PostModelSwitch` | After the session's model changes, including changes Claude Code makes on its own, such as restoring the model when you resume a session |

65| `Elicitation` | When an MCP server requests user input during a tool call |67| `Elicitation` | When an MCP server requests user input during a tool call |

66| `ElicitationResult` | After a user responds to an MCP elicitation, before the response is sent back to the server |68| `ElicitationResult` | After a user responds to an MCP elicitation, before the response is sent back to the server |

67| `SessionEnd` | When a session terminates |69| `SessionEnd` | When a session terminates |

488| `WorktreeRemove` | When a worktree is being removed at session exit, when a subagent finishes, or when you delete a background session |488| `WorktreeRemove` | When a worktree is being removed at session exit, when a subagent finishes, or when you delete a background session |

489| `PreCompact` | Before context compaction |489| `PreCompact` | Before context compaction |

490| `PostCompact` | After context compaction completes |490| `PostCompact` | After context compaction completes |

491| `PreModelSwitch` | Before Claude Code applies a model switch that you or a client requested. Can block the switch |

492| `PostModelSwitch` | After the session's model changes, including changes Claude Code makes on its own, such as restoring the model when you resume a session |

491| `Elicitation` | When an MCP server requests user input during a tool call |493| `Elicitation` | When an MCP server requests user input during a tool call |

492| `ElicitationResult` | After a user responds to an MCP elicitation, before the response is sent back to the server |494| `ElicitationResult` | After a user responds to an MCP elicitation, before the response is sent back to the server |

493| `SessionEnd` | When a session terminates |495| `SessionEnd` | When a session terminates |

148| `WorktreeRemove` | When a worktree is being removed at session exit, when a subagent finishes, or when you delete a background session |148| `WorktreeRemove` | When a worktree is being removed at session exit, when a subagent finishes, or when you delete a background session |

149| `PreCompact` | Before context compaction |149| `PreCompact` | Before context compaction |

150| `PostCompact` | After context compaction completes |150| `PostCompact` | After context compaction completes |

151| `PreModelSwitch` | Before Claude Code applies a model switch that you or a client requested. Can block the switch |

152| `PostModelSwitch` | After the session's model changes, including changes Claude Code makes on its own, such as restoring the model when you resume a session |

151| `Elicitation` | When an MCP server requests user input during a tool call |153| `Elicitation` | When an MCP server requests user input during a tool call |

152| `ElicitationResult` | After a user responds to an MCP elicitation, before the response is sent back to the server |154| `ElicitationResult` | After a user responds to an MCP elicitation, before the response is sent back to the server |

153| `SessionEnd` | When a session terminates |155| `SessionEnd` | When a session terminates |