Add patch checkpointing

1 files changed, 42 insertions, 0 deletions

diff --git a/makima/src/db/models.rs b/makima/src/db/models.rs
index 6ede268..58f4da1 100644
--- a/makima/src/db/models.rs
+++ b/makima/src/db/models.rs
@@ -1966,3 +1966,45 @@ pub struct ForkPoint {
     pub checkpoint: Option<TaskCheckpoint>,
     pub timestamp: DateTime<Utc>,
 }
+
+// ============================================================================
+// Checkpoint Patches (for task recovery when worktrees are lost)
+// ============================================================================
+
+/// A stored git patch for checkpoint recovery.
+/// Enables task recovery when local worktrees are deleted or corrupted.
+#[derive(Debug, Clone, FromRow, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CheckpointPatch {
+    pub id: Uuid,
+    pub task_id: Uuid,
+    /// Optional link to a task_checkpoint record
+    pub checkpoint_id: Option<Uuid>,
+    /// The commit SHA that the patch should be applied on top of
+    pub base_commit_sha: String,
+    /// Compressed git diff data (gzip)
+    #[sqlx(rename = "patch_data")]
+    #[serde(skip)] // Don't serialize binary data to JSON
+    pub patch_data: Vec<u8>,
+    /// Size of the compressed patch in bytes
+    pub patch_size_bytes: i32,
+    /// Number of files affected by this patch
+    pub files_count: i32,
+    pub created_at: DateTime<Utc>,
+    /// When this patch expires and will be automatically deleted
+    pub expires_at: DateTime<Utc>,
+}
+
+/// Response for checkpoint patch (without binary data)
+#[derive(Debug, Clone, FromRow, Serialize, ToSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct CheckpointPatchInfo {
+    pub id: Uuid,
+    pub task_id: Uuid,
+    pub checkpoint_id: Option<Uuid>,
+    pub base_commit_sha: String,
+    pub patch_size_bytes: i32,
+    pub files_count: i32,
+    pub created_at: DateTime<Utc>,
+    pub expires_at: DateTime<Utc>,
+}