Documentation 2026-07-31 22:02 UTC to 2026-08-02 19:00 UTC

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29 <img src="https://mintcdn.com/claude-code/uLsR38F1U_5zPppm/images/hooks-lifecycle.svg?fit=max&auto=format&n=uLsR38F1U_5zPppm&q=85&s=fbdbd78ad9f474da7d344879341341f0" alt="Hook-Lebenszyklus-Diagramm, das optionales Setup zeigt, das in SessionStart führt, dann eine Pro-Runde-Schleife mit UserPromptSubmit, UserPromptExpansion für Slash-Befehle, die verschachtelte agentengesteuerte Schleife (PreToolUse, PermissionRequest, PostToolUse, PostToolUseFailure, PostToolBatch, SubagentStart/Stop, TaskCreated, TaskCompleted) und Stop oder StopFailure, gefolgt von TeammateIdle, PreCompact, PostCompact und SessionEnd, mit Elicitation und ElicitationResult verschachtelt in MCP-Tool-Ausführung, PermissionDenied als Seitenzweig von PermissionRequest für Auto-Mode-Ablehnungen, WorktreeCreate, WorktreeRemove, Notification, ConfigChange, InstructionsLoaded, CwdChanged und FileChanged als eigenständige asynchrone Ereignisse, und MessageDisplay als reines Anzeigereignis, das während des Streamings von Assistenten-Nachrichtentexten ausgeführt wird" width="520" height="1228" data-path="images/hooks-lifecycle.svg" />29 <img src="https://mintcdn.com/claude-code/jhXrDR5TrSZ5hgXM/images/hooks-lifecycle.svg?fit=max&auto=format&n=jhXrDR5TrSZ5hgXM&q=85&s=3ca47113d5956460e6e4611b8dbc63b7" alt="Hook-Lebenszyklus-Diagramm, das optionales Setup zeigt, das in SessionStart führt, dann eine Pro-Runde-Schleife mit UserPromptSubmit, UserPromptExpansion für Slash-Befehle, die verschachtelte agentengesteuerte Schleife (PreToolUse, PermissionRequest, PostToolUse, PostToolUseFailure, PostToolBatch, SubagentStart/Stop, TaskCreated, TaskCompleted) und Stop oder StopFailure, gefolgt von TeammateIdle, PreCompact, PostCompact und SessionEnd, mit Elicitation und ElicitationResult verschachtelt in MCP-Tool-Ausführung, PermissionDenied als Seitenzweig von PermissionRequest für Auto-Mode-Ablehnungen, WorktreeCreate, WorktreeRemove, Notification, ConfigChange, InstructionsLoaded, CwdChanged und FileChanged als eigenständige asynchrone Ereignisse, und MessageDisplay als reines Anzeigereignis, das während des Streamings von Assistenten-Nachrichtentexten ausgeführt wird" width="520" height="1228" data-path="images/hooks-lifecycle.svg" />

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56| `InstructionsLoaded` | When a CLAUDE.md or `.claude/rules/*.md` file is loaded into context. Fires at session start and when files are lazily loaded during a session |56| `InstructionsLoaded` | When a CLAUDE.md or `.claude/rules/*.md` file is loaded into context. Fires at session start and when files are lazily loaded during a session |

57| `ConfigChange` | When a configuration file changes during a session |57| `ConfigChange` | When a configuration file changes during a session |

58| `CwdChanged` | When the working directory changes, for example when Claude executes a `cd` command. Useful for reactive environment management with tools like direnv |58| `CwdChanged` | When the working directory changes, for example when Claude executes a `cd` command. Useful for reactive environment management with tools like direnv |

59| `DirectoryAdded` | When a working directory is added mid-session via `/add-dir` or the SDK `register_repo_root` control request |

59| `FileChanged` | When a watched file changes on disk. The `matcher` field specifies which filenames to watch |60| `FileChanged` | When a watched file changes on disk. The `matcher` field specifies which filenames to watch |

60| `WorktreeCreate` | When a worktree is being created via `--worktree`, `isolation: "worktree"`, or for a background session. Replaces default git behavior |61| `WorktreeCreate` | When a worktree is being created via `--worktree`, `isolation: "worktree"`, or for a background session. Replaces default git behavior |

61| `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 |

482| `InstructionsLoaded` | When a CLAUDE.md or `.claude/rules/*.md` file is loaded into context. Fires at session start and when files are lazily loaded during a session |482| `InstructionsLoaded` | When a CLAUDE.md or `.claude/rules/*.md` file is loaded into context. Fires at session start and when files are lazily loaded during a session |

483| `ConfigChange` | When a configuration file changes during a session |483| `ConfigChange` | When a configuration file changes during a session |

484| `CwdChanged` | When the working directory changes, for example when Claude executes a `cd` command. Useful for reactive environment management with tools like direnv |484| `CwdChanged` | When the working directory changes, for example when Claude executes a `cd` command. Useful for reactive environment management with tools like direnv |

485| `DirectoryAdded` | When a working directory is added mid-session via `/add-dir` or the SDK `register_repo_root` control request |

485| `FileChanged` | When a watched file changes on disk. The `matcher` field specifies which filenames to watch |486| `FileChanged` | When a watched file changes on disk. The `matcher` field specifies which filenames to watch |

486| `WorktreeCreate` | When a worktree is being created via `--worktree`, `isolation: "worktree"`, or for a background session. Replaces default git behavior |487| `WorktreeCreate` | When a worktree is being created via `--worktree`, `isolation: "worktree"`, or for a background session. Replaces default git behavior |

487| `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 |

142| `InstructionsLoaded` | When a CLAUDE.md or `.claude/rules/*.md` file is loaded into context. Fires at session start and when files are lazily loaded during a session |142| `InstructionsLoaded` | When a CLAUDE.md or `.claude/rules/*.md` file is loaded into context. Fires at session start and when files are lazily loaded during a session |

143| `ConfigChange` | When a configuration file changes during a session |143| `ConfigChange` | When a configuration file changes during a session |

144| `CwdChanged` | When the working directory changes, for example when Claude executes a `cd` command. Useful for reactive environment management with tools like direnv |144| `CwdChanged` | When the working directory changes, for example when Claude executes a `cd` command. Useful for reactive environment management with tools like direnv |

145| `DirectoryAdded` | When a working directory is added mid-session via `/add-dir` or the SDK `register_repo_root` control request |

145| `FileChanged` | When a watched file changes on disk. The `matcher` field specifies which filenames to watch |146| `FileChanged` | When a watched file changes on disk. The `matcher` field specifies which filenames to watch |

146| `WorktreeCreate` | When a worktree is being created via `--worktree`, `isolation: "worktree"`, or for a background session. Replaces default git behavior |147| `WorktreeCreate` | When a worktree is being created via `--worktree`, `isolation: "worktree"`, or for a background session. Replaces default git behavior |

147| `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 |