> ## Documentation Index > Fetch the complete documentation index at: https://si.easyaf.dev/llms.txt > Use this file to discover all available pages before exploring further. # Overview > Summary of the CloudNimble.ClaudeEssentials.Hooks.Inputs Namespace ## Summary The `Inputs` namespace contains classes for deserializing JSON data that Claude Code sends to hooks via stdin. Each hook event type has a corresponding input class. ## Input Classes | Class | Hook Event | Description | | - | - | - | | `PreToolUseHookInput` | PreToolUse | Received before a tool executes | | `PostToolUseHookInput` | PostToolUse | Received after a tool completes | | `PermissionRequestHookInput` | PermissionRequest | Received when permission is requested | | `UserPromptSubmitHookInput` | UserPromptSubmit | Received when user submits a prompt | | `StopHookInput` | Stop | Received when Claude finishes responding | | `SubagentStopHookInput` | SubagentStop | Received when a subagent completes | | `NotificationHookInput` | Notification | Received for notifications | | `SessionStartHookInput` | SessionStart | Received when a session starts | | `SessionEndHookInput` | SessionEnd | Received when a session ends | | `PreCompactHookInput` | PreCompact | Received before context compaction | All input classes inherit from `HookInputBase` which provides common properties like `SessionId`, `TranscriptPath`, and `CurrentWorkingDirectory`. ## Usage ### Deserializing Hook Input Use `ClaudeHooksSerializer` to deserialize input from stdin: ```csharp theme={"dark"} // For PreToolUse hooks var input = ClaudeHooksSerializer.DeserializePreToolUseInput(Console.In.ReadToEnd()); Console.WriteLine($"Tool: {input?.ToolName}"); Console.WriteLine($"Session: {input?.SessionId}"); // For strongly-typed tool input (requires custom JsonSerializerContext) var typedInput = ClaudeHooksSerializer.DeserializePreToolUseInput( json, MyJsonContext.Default.PreToolUseHookInputMyToolInput); ``` ### Common Base Properties All inputs include these properties from `HookInputBase`: * `SessionId` - Unique session identifier * `TranscriptPath` - Path to conversation transcript * `CurrentWorkingDirectory` - Active working directory * `PermissionMode` - Current permission mode * `HookEventName` - The event that triggered this hook ## Types ### Classes | Name | Summary | | - | - | | [BackgroundTaskSummary](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/BackgroundTaskSummary.md) | Represents in-flight background work registered in a session. | | [HookInputBase](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/HookInputBase.md) | Base class containing common fields present in all hook inputs. All hooks receive these fields via JSON through stdin. | | [ModelSwitchHookInputBase](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/ModelSwitchHookInputBase.md) | Base class for the inputs received by hooks that run around a model switch. | | [ToolHookInputBase](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/ToolHookInputBase.md) | Base class for tool-related hook inputs that contain tool name, input, and use ID. Used as a base for PreToolUse and PostToolUse hook inputs. | | [ConfigChangeHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/ConfigChangeHookInput.md) | Represents the input received by a ConfigChange hook. This hook runs when a configuration setting changes. | | [CwdChangedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/CwdChangedHookInput.md) | Represents the input received by a CwdChanged hook. This hook runs when the current working directory changes. | | [DirectoryAddedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/DirectoryAddedHookInput.md) | Represents the input received by a DirectoryAdded hook, which runs when a directory is added to the session. | | [ElicitationHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/ElicitationHookInput.md) | Represents the input received by an Elicitation hook. This hook runs when an elicitation dialog is presented to the user. | | [ElicitationResultHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/ElicitationResultHookInput.md) | Represents the input received by an ElicitationResult hook. This hook runs when the user responds to an elicitation dialog. | | [FileChangedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/FileChangedHookInput.md) | Represents the input received by a FileChanged hook. This hook runs when a file is changed externally. | | [HookEffortInfo](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/HookEffortInfo.md) | Represents the reasoning effort applied to the current turn. | | [InstructionsLoadedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/InstructionsLoadedHookInput.md) | Represents the input received by an InstructionsLoaded hook. This hook runs when instructions (CLAUDE.md files, etc.) are loaded. | | [McpServerProvenance](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/McpServerProvenance.md) | Represents the MCP server that provides a tool. | | [MessageDisplayHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/MessageDisplayHookInput.md) | Represents the input received by a MessageDisplay hook, which runs as assistant message text is displayed. | | [NotificationHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/NotificationHookInput.md) | Represents the input received by a Notification hook. This hook runs when Claude Code sends notifications. | | [PermissionDeniedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PermissionDeniedHookInput.md) | Represents the input received by a PermissionDenied hook. This hook runs when a permission request is denied. | | [PermissionRequestHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PermissionRequestHookInput.md) | Represents the input received by a PermissionRequest hook. This hook runs when a permission dialog is shown and can automatically allow or deny permissions. | | [PostCompactHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PostCompactHookInput.md) | Represents the input received by a PostCompact hook. This hook runs after a compact operation completes. | | [PostModelSwitchHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PostModelSwitchHookInput.md) | Represents the input received by a PostModelSwitch hook, which runs after the session switches models. | | [PostToolBatchHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PostToolBatchHookInput.md) | Represents the input received by a PostToolBatch hook, which runs once after every tool call in a batch has resolved. | | [PostToolBatchToolCall](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PostToolBatchToolCall.md) | Represents one tool call in a resolved batch. | | [PostToolUseFailureHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PostToolUseFailureHookInput.md) | Represents the input received by a PostToolUseFailure hook. This hook runs after a tool call fails. | | [PostToolUseHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PostToolUseHookInput.md) | Represents the input received by a PostToolUse hook. This hook runs after tool calls complete and includes the tool's response. | | [PreCompactHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PreCompactHookInput.md) | Represents the input received by a PreCompact hook. This hook runs before a compact operation. | | [PreModelSwitchHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PreModelSwitchHookInput.md) | Represents the input received by a PreModelSwitch hook, which runs before the session switches models. | | [PreToolUseHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/PreToolUseHookInput.md) | Represents the input received by a PreToolUse hook. This hook runs before tool calls are executed and can block or modify them. | | [SessionCronSummary](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/SessionCronSummary.md) | Represents a session-scoped cron task that will wake a session later. | | [SessionEndHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/SessionEndHookInput.md) | Represents the input received by a SessionEnd hook. This hook runs when a Claude Code session ends. | | [SessionStartHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/SessionStartHookInput.md) | Represents the input received by a SessionStart hook. This hook runs when Claude Code starts a new session or resumes one. | | [SetupHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/SetupHookInput.md) | Represents the input received by a Setup hook, which runs during repository setup or maintenance. | | [StopFailureHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/StopFailureHookInput.md) | Represents the input received by a StopFailure hook. This hook runs when a stop hook itself fails. | | [StopHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/StopHookInput.md) | Represents the input received by a Stop hook. This hook runs when Claude Code finishes responding. | | [SubagentStartHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/SubagentStartHookInput.md) | Represents the input received by a SubagentStart hook. This hook runs when a subagent task starts. | | [SubagentStopHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/SubagentStopHookInput.md) | Represents the input received by a SubagentStop hook. This hook runs when subagent tasks complete. | | [TaskCompletedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/TaskCompletedHookInput.md) | Represents the input received by a TaskCompleted hook. This hook runs when a task completes. | | [TaskCreatedHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/TaskCreatedHookInput.md) | Represents the input received by a TaskCreated hook. This hook runs when a task is created. | | [TeammateIdleHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/TeammateIdleHookInput.md) | Represents the input received by a TeammateIdle hook. This hook runs when a teammate agent becomes idle. | | [UserPromptExpansionHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/UserPromptExpansionHookInput.md) | Represents the input received by a UserPromptExpansion hook, which runs when a slash command or MCP prompt expands into a prompt. | | [UserPromptSubmitHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/UserPromptSubmitHookInput.md) | Represents the input received by a UserPromptSubmit hook. This hook runs when the user submits a prompt, before Claude processes it. | | [WorktreeCreateHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/WorktreeCreateHookInput.md) | Represents the input received by a WorktreeCreate hook. This hook runs when a git worktree is created. | | [WorktreeRemoveHookInput](https://si.easyaf.dev/claudeessentials/api-reference/CloudNimble/ClaudeEssentials/Hooks/Inputs/WorktreeRemoveHookInput.md) | Represents the input received by a WorktreeRemove hook. This hook runs when a git worktree is removed. | This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.