Add extension-frame refine and lossless anchor options.

Prefer clip anchor PNGs for handoffs, optionally run Bilateral+Flux cleanup before I2V, and save decoded last-frame anchors so sequential extensions accumulate less compression damage.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/utils/pending.ts

@@ -56,6 +56,9 @@ export interface PendingJob {
   queueAutoRun?: boolean
   queueBudget?: number
   stopAfterCurrent?: boolean
+  refineExtensionFrame?: boolean
+  saveLosslessAnchor?: boolean
+  refinementDenoise?: number
   loraName?: string
   loraStack?: import('~/utils/loras').LoraStackItem[]
   shotLoras?: string[]
@@ -155,6 +158,9 @@ export function pendingFromJob(job: Job, overrides: Partial<PendingJob> = {}): P
     queueAutoRun: library.queueAutoRun,
     queueBudget: library.queueBudget,
     stopAfterCurrent: library.stopAfterCurrent,
+    refineExtensionFrame: library.refineExtensionFrame,
+    saveLosslessAnchor: library.saveLosslessAnchor,
+    refinementDenoise: library.refinementDenoise,
     ...overrides
   }
 }
@@ -203,6 +209,9 @@ export function libraryFromPending(pending: PendingJob): NonNullable<Job['librar
     queueAutoRun: pending.queueAutoRun,
     queueBudget: pending.queueBudget,
     stopAfterCurrent: pending.stopAfterCurrent,
+    refineExtensionFrame: pending.refineExtensionFrame,
+    saveLosslessAnchor: pending.saveLosslessAnchor,
+    refinementDenoise: pending.refinementDenoise,
     globalLocks: pending.globalLocks,
     permanenceRefs: pending.permanenceRefs,
     shotPermanenceRefs: pending.shotPermanenceRefs,
@@ -342,6 +351,32 @@ export async function completePendingIfReady(pending: PendingJob) {
     loraStack: pending.loraStack,
     segmentFirstFrame
   })
+  if (pending.saveLosslessAnchor === true) {
+    try {
+      const { persistClipAnchorFrame, extractAnchorImageFromHistory, downloadAnchorImage } = await import('~/server/utils/extensionFrame')
+      let saved = false
+      const anchorImage = extractAnchorImageFromHistory(history, pending.promptId)
+      if (anchorImage) {
+        const png = await downloadAnchorImage(anchorImage)
+        if (png.length >= 64) {
+          await persistClipAnchorFrame({
+            ownerKey: pending.ownerKey,
+            clipId: clip.id,
+            fromBuffer: png
+          })
+          saved = true
+        }
+      }
+      if (!saved) {
+        await persistClipAnchorFrame({
+          ownerKey: pending.ownerKey,
+          clipId: clip.id
+        })
+      }
+    } catch {
+      /* optional */
+    }
+  }
   await purgeComfyArtifacts({
     video,
     imageName: pending.imageName,