Create a named checkpoint of the entire project. Runs in background — returns immediately. If slots are full, DO NOT auto-retry — ask the user whether to delete an existing checkpoint or increase capacity.

List all checkpoints and disk usage. With name: list files inside that checkpoint.

Search and investigate previous versions of your codebase. Compare checkpoint vs current working directory (with full unified diffs), compare two checkpoints against each other, retrieve any file's content from any checkpoint, or search for a string across all checkpoints to find when code existed. Use this to find previous versions of files or functions, understand what changed, and pull out whatever snippets or diffs are needed — then apply selectively with Edit.

Restore project to a checkpoint state. Quicksaves current state first. Displaced files (modified + new) are preserved in .claude/vigil/artifacts/ — nothing is ever deleted. For individual file/function restores, use vigil_diff to get the content and apply with Edit.

Delete a checkpoint and reclaim disk space. Use all=true to delete all checkpoints. Note: artifact directories from previous restores are NOT deleted — ask the user if they want you to clean those up separately.