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>

pages/index.vue

@@ -1109,6 +1109,41 @@
             <span class="mt-0.5 block text-xs text-zinc-500">Overnight set-and-forget. Leave this off to edit prompts on Queue (under this job) and process the next shot when you are ready.</span>
           </span>
         </label>
+        <div v-if="studioMode === 'video'" class="space-y-3">
+          <label
+            class="flex cursor-pointer items-start gap-3 rounded-2xl border border-white/10 bg-zinc-950/40 px-4 py-3"
+            title="Runs a low-denoise Bilateral + Flux cleanup pass on the handoff frame to strip compression artifacts."
+          >
+            <input v-model="refineExtensionFrame" type="checkbox" class="mt-1">
+            <span>
+              <span class="block text-sm font-medium text-zinc-200">Refine Extension Frame</span>
+              <span class="mt-0.5 block text-xs text-zinc-500">Runs a low-denoise Bilateral + Flux cleanup pass on the handoff frame to strip compression artifacts.</span>
+            </span>
+          </label>
+          <div
+            v-if="refineExtensionFrame"
+            class="rounded-2xl border border-white/10 bg-zinc-950/40 p-3"
+          >
+            <Thumbwheel
+              v-model="refinementDenoise"
+              label="Refinement Denoise"
+              :min="REFINEMENT_DENOISE_MIN"
+              :max="REFINEMENT_DENOISE_MAX"
+              :step="0.01"
+              :digits="2"
+            />
+          </div>
+          <label
+            class="flex cursor-pointer items-start gap-3 rounded-2xl border border-white/10 bg-zinc-950/40 px-4 py-3"
+            title="Saves an uncompressed PNG of the final frame alongside the MP4 for cleaner future extensions."
+          >
+            <input v-model="saveLosslessAnchor" type="checkbox" class="mt-1">
+            <span>
+              <span class="block text-sm font-medium text-zinc-200">Save Lossless Anchor Frame</span>
+              <span class="mt-0.5 block text-xs text-zinc-500">Saves an uncompressed PNG of the final frame alongside the MP4 for cleaner future extensions.</span>
+            </span>
+          </label>
+        </div>
         <div class="flex flex-wrap gap-3">
           <button
             type="button"
@@ -1458,6 +1493,38 @@
               @insert-trigger="insertLoraTrigger($event, 'extend')"
               @update-trigger="saveLoraTrigger"
             />
+            <div class="space-y-3">
+              <label
+                class="flex cursor-pointer items-start gap-3 rounded-xl border border-white/10 bg-zinc-950/40 px-3 py-2.5"
+                title="Runs a low-denoise Bilateral + Flux cleanup pass on the handoff frame to strip compression artifacts."
+              >
+                <input v-model="refineExtensionFrame" type="checkbox" class="mt-1">
+                <span>
+                  <span class="block text-sm font-medium text-zinc-200">Refine Extension Frame</span>
+                  <span class="mt-0.5 block text-xs text-zinc-500">Bilateral + Flux cleanup on the handoff frame.</span>
+                </span>
+              </label>
+              <div v-if="refineExtensionFrame" class="rounded-xl border border-white/10 bg-zinc-950/40 p-3">
+                <Thumbwheel
+                  v-model="refinementDenoise"
+                  label="Refinement Denoise"
+                  :min="REFINEMENT_DENOISE_MIN"
+                  :max="REFINEMENT_DENOISE_MAX"
+                  :step="0.01"
+                  :digits="2"
+                />
+              </div>
+              <label
+                class="flex cursor-pointer items-start gap-3 rounded-xl border border-white/10 bg-zinc-950/40 px-3 py-2.5"
+                title="Saves an uncompressed PNG of the final frame alongside the MP4 for cleaner future extensions."
+              >
+                <input v-model="saveLosslessAnchor" type="checkbox" class="mt-1">
+                <span>
+                  <span class="block text-sm font-medium text-zinc-200">Save Lossless Anchor Frame</span>
+                  <span class="mt-0.5 block text-xs text-zinc-500">Keep a PNG anchor with this extension for cleaner next hops.</span>
+                </span>
+              </label>
+            </div>
             <button
               type="button"
               class="w-full rounded-2xl bg-amber-400 px-4 py-2.5 text-sm font-semibold text-zinc-950 transition hover:bg-amber-300 disabled:cursor-not-allowed disabled:opacity-50"
@@ -2324,6 +2391,12 @@ import {
   defaultVideoDurationPref,
   setDefaultVideoDurationPref
 } from '~/utils/videoDuration'
+import {
+  clampRefinementDenoise,
+  REFINEMENT_DENOISE_DEFAULT,
+  REFINEMENT_DENOISE_MAX,
+  REFINEMENT_DENOISE_MIN
+} from '~/utils/extensionFrame'
 
 const runtimeConfig = useRuntimeConfig()
 const route = useRoute()
@@ -2758,6 +2831,9 @@ const renameDraft = ref('')
 const renameInput = ref<HTMLInputElement | null>(null)
 const unlockPassword = ref('')
 const queueAutoRun = ref(false)
+const refineExtensionFrame = ref(true)
+const saveLosslessAnchor = ref(false)
+const refinementDenoise = ref(REFINEMENT_DENOISE_DEFAULT)
 const queuePendingCount = ref(0)
 const activeQueueId = ref('')
 const liveQueue = ref<{
@@ -5452,6 +5528,9 @@ async function restoreStudioPayload(kind: string, payload: {
       referenceStillIds?: Array<string | null>
       extensions?: { prompt: string; promptPre?: string; promptPost?: string; duration: number; permanenceRefs?: PermanenceRef[]; loraName?: string; loraStack?: LoraStackItem[] }[]
       queueAutoRun?: boolean
+      refineExtensionFrame?: boolean
+      saveLosslessAnchor?: boolean
+      refinementDenoise?: number
       promptPre?: string
       promptPost?: string
       globalLocks?: string
@@ -5520,6 +5599,9 @@ async function restoreStudioPayload(kind: string, payload: {
     readLoraStack(item)
   ))
   queueAutoRun.value = payload.queueAutoRun === true
+  refineExtensionFrame.value = payload.refineExtensionFrame !== false
+  saveLosslessAnchor.value = payload.saveLosslessAnchor === true
+  refinementDenoise.value = clampRefinementDenoise(payload.refinementDenoise, REFINEMENT_DENOISE_DEFAULT)
   globalLocks.value = payload.globalLocks || ''
   familyPermanenceRefs.value = payload.permanenceRefs || []
   const shotRefs: Record<number, PermanenceRef[]> = {}
@@ -6113,7 +6195,10 @@ async function generateExtension() {
         promptPre: extendPromptPre.value,
         promptPost: extendPromptPost.value,
         duration: extendDuration.value,
-        loraStack: extendLoraStack.value
+        loraStack: extendLoraStack.value,
+        refineExtensionFrame: refineExtensionFrame.value,
+        saveLosslessAnchor: saveLosslessAnchor.value,
+        refinementDenoise: clampRefinementDenoise(refinementDenoise.value)
       }
     })
     if (queuedOffLiveOutput(started, 'video')) {
@@ -7391,6 +7476,9 @@ async function generate() {
       }))))
       body.append('queueAutoRun', String(queueAutoRun.value))
     }
+    body.append('refineExtensionFrame', String(refineExtensionFrame.value))
+    body.append('saveLosslessAnchor', String(saveLosslessAnchor.value))
+    body.append('refinementDenoise', String(clampRefinementDenoise(refinementDenoise.value)))
     const downloadName = clipFileName(clipName.value.trim() || autoOutputName.value)
     const chainPlan = plannedChain.value.map(part => ({ ...part }))
     console.info('[aigen generate payload]', {