{"version":"1.0.128","anchor":"file-checkpointing-enablement","canonical_anchor":"file-checkpointing-enablement","heading":"File Checkpointing Enablement","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/1.0.128\/e\/file-checkpointing-enablement","release_url":"https:\/\/changelogs.core-directive.com\/v\/1.0.128","markdown":"### File Checkpointing Enablement\n\n**What:** Unlocked the file checkpointing (\"Rewind\") feature that allows reverting file changes to previous snapshots.\n\n**Details:**\n\n- Feature existed in previous versions but was hardcoded to disabled\n- Now activatable via the `tengu_use_file_checkpoints` feature flag\n- UI toggle added in settings: \"Checkpointing (Rewind)\" (line 400220)\n- Can be disabled via `CLAUDE_CODE_DISABLE_FILE_CHECKPOINTING` environment variable\n- Tracks file modifications and creates snapshots at message boundaries\n- Enables rewinding files to previous states during conversations\n- Disabled in headless mode\n- Still behind a feature flag for gradual rollout\n- **Evidence**: Activation function `u7()` at line 380874, UI controls at lines 400220-400237"}