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+# UX Rework Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** Three focused UX improvements: hide branching UI, skip move-only autosaves, and show specific diff details on hover.
+
+**Architecture:** All changes are in `js/snapshot_manager.js`. No backend changes needed. Diff summary is computed at capture time and stored in snapshot metadata so hover display is instant (no extra fetch).
+
+**Tech Stack:** Vanilla JS, ComfyUI extension API, existing `computeDetailedDiff()` function (line 485).
+
+---
+
+### Task 1: Hide branching UI
+
+**Files:**
+- Modify: `js/snapshot_manager.js:27` (branchingDefault)
+- Modify: `js/snapshot_manager.js:350-354` (isBranchingEnabled)
+- Modify: `js/snapshot_manager.js:2847-2866` (branchToggleBtn)
+
+**Step 1: Add BRANCHING_ENABLED constant**
+
+At the very top of the file (after the opening comment block, around line 1-30), add this constant near the other state variables:
+
+```js
+const BRANCHING_ENABLED = false;
+```
+
+Place it just before line 27 (`let branchingDefault = true;`).
+
+**Step 2: Short-circuit isBranchingEnabled()**
+
+Current code at line 350:
+```js
+function isBranchingEnabled(wk) {
+    if (!wk) wk = getEffectiveWorkflowKey();
+    if (workflowBranchOverrides.has(wk)) return workflowBranchOverrides.get(wk);
+    return branchingDefault;
+}
+```
+
+Add an early return at the top of the function:
+```js
+function isBranchingEnabled(wk) {
+    if (!BRANCHING_ENABLED) return false;
+    if (!wk) wk = getEffectiveWorkflowKey();
+    if (workflowBranchOverrides.has(wk)) return workflowBranchOverrides.get(wk);
+    return branchingDefault;
+}
+```
+
+This makes all 14 existing `isBranchingEnabled()` callsites automatically behave as if branching is off — no other changes needed in capture, sidebar, or timeline code.
+
+**Step 3: Hide the branch toggle button in the sidebar**
+
+The button is created at line 2847 and appended at line 2866. Hide it:
+
+Current (line 2847):
+```js
+const branchToggleBtn = document.createElement("button");
+branchToggleBtn.className = "snap-filter-auto-btn" + (isBranchingEnabled() ? " active" : "");
+```
+
+Change to:
+```js
+const branchToggleBtn = document.createElement("button");
+branchToggleBtn.className = "snap-filter-auto-btn" + (isBranchingEnabled() ? " active" : "");
+branchToggleBtn.style.display = "none";
+```
+
+**Step 4: Verify manually in browser**
+- Open ComfyUI, open snapshot manager sidebar
+- Confirm "Branch" button is not visible
+- Create 2-3 snapshots, confirm no branch navigator (`< 1/2 >`) appears
+- Confirm timeline has no expand button
+
+**Step 5: Commit**
+```bash
+git add js/snapshot_manager.js
+git commit -m "Hide branching UI (BRANCHING_ENABLED = false)"
+```
+
+---
+
+### Task 2: Skip move-only autosaves
+
+**Files:**
+- Modify: `js/snapshot_manager.js:1459-1460`
+
+**Step 1: Add move filter in _captureSnapshotInner**
+
+Current code at lines 1458-1460:
+```js
+const prevGraph = lastGraphDataMap.get(workflowKey);
+const changeType = detectChangeType(prevGraph, graphData);
+
+// Determine parentId for branching
+```
+
+Add one line after the changeType computation:
+```js
+const prevGraph = lastGraphDataMap.get(workflowKey);
+const changeType = detectChangeType(prevGraph, graphData);
+if (changeType === "move") return false;
+
+// Determine parentId for branching
+```
+
+**Step 2: Verify manually in browser**
+- Open ComfyUI, move several nodes around
+- Confirm no new snapshots appear in the sidebar/timeline while moving
+- Add a node → confirm a snapshot IS created
+- Change a parameter → confirm a snapshot IS created
+
+**Step 3: Commit**
+```bash
+git add js/snapshot_manager.js
+git commit -m "Skip autosave for move-only changes"
+```
+
+---
+
+### Task 3: Store diff summary at capture time
+
+**Files:**
+- Modify: `js/snapshot_manager.js:614` (after computeDetailedDiff, add new helper)
+- Modify: `js/snapshot_manager.js:1471-1481` (record construction in _captureSnapshotInner)
+- Modify: `js/snapshot_manager.js:1550-1562` (record construction in captureNodeSnapshot)
+
+**Step 1: Add computeCaptureMetaDiff() and formatCaptureDiffLines() helpers**
+
+Insert these two functions right after `computeDetailedDiff` ends (after line 614, before the SVG section comment at line 616):
+
+```js
+// Compact diff stored in snapshot metadata for hover display
+function computeCaptureMetaDiff(prevGraph, currGraph) {
+    if (!prevGraph || !currGraph) return null;
+    const diff = computeDetailedDiff(prevGraph, currGraph);
+    const result = {};
+    if (diff.addedNodes.length > 0)
+        result.added = diff.addedNodes.map(n => n.title);
+    if (diff.removedNodes.length > 0)
+        result.removed = diff.removedNodes.map(n => n.title);
+    // Nodes with param/property changes (ignore pure position/size changes)
+    const paramChanged = diff.modifiedNodes.filter(n =>
+        n.changes.widgetValues || n.changes.properties || n.changes.title || n.changes.mode
+    );
+    if (paramChanged.length > 0)
+        result.params = paramChanged.map(n => {
+            const count = (n.changes.widgetValues?.length ?? 0) + (n.changes.properties?.length ?? 0);
+            return count > 0 ? `${n.title} (${count} value${count > 1 ? "s" : ""})` : n.title;
+        });
+    if (diff.addedLinks.length > 0 || diff.removedLinks.length > 0)
+        result.links = { added: diff.addedLinks.length, removed: diff.removedLinks.length };
+    return Object.keys(result).length > 0 ? result : null;
+}
+
+function formatCaptureDiffLines(captureDiff) {
+    if (!captureDiff) return [];
+    const lines = [];
+    if (captureDiff.added?.length)
+        lines.push(`+ ${captureDiff.added.join(", ")}`);
+    if (captureDiff.removed?.length)
+        lines.push(`− ${captureDiff.removed.join(", ")}`);
+    if (captureDiff.params?.length)
+        lines.push(`~ ${captureDiff.params.join(", ")}`);
+    if (captureDiff.links) {
+        const parts = [];
+        if (captureDiff.links.added) parts.push(`+${captureDiff.links.added} link${captureDiff.links.added > 1 ? "s" : ""}`);
+        if (captureDiff.links.removed) parts.push(`−${captureDiff.links.removed} link${captureDiff.links.removed > 1 ? "s" : ""}`);
+        if (parts.length) lines.push(parts.join(", "));
+    }
+    return lines;
+}
+```
+
+**Step 2: Add captureDiff to record in _captureSnapshotInner**
+
+Current record construction at lines 1471-1481:
+```js
+const record = {
+    id: generateId(),
+    workflowKey,
+    timestamp: Date.now(),
+    label,
+    nodeCount: nodes.length,
+    graphData,
+    locked: false,
+    changeType,
+    parentId,
+};
+```
+
+Add `captureDiff` field:
+```js
+const captureDiff = computeCaptureMetaDiff(prevGraph, graphData);
+const record = {
+    id: generateId(),
+    workflowKey,
+    timestamp: Date.now(),
+    label,
+    nodeCount: nodes.length,
+    graphData,
+    locked: false,
+    changeType,
+    parentId,
+    ...(captureDiff ? { captureDiff } : {}),
+};
+```
+
+**Step 3: Same for captureNodeSnapshot**
+
+Current record construction at lines 1550-1562:
+```js
+const record = {
+    id: generateId(),
+    workflowKey,
+    timestamp: Date.now(),
+    label,
+    nodeCount: nodes.length,
+    graphData,
+    locked: false,
+    source: "node",
+    changeType,
+    parentId,
+    ...(thumbnail ? { thumbnail } : {}),
+};
+```
+
+Change to:
+```js
+const captureDiff = computeCaptureMetaDiff(prevGraph, graphData);
+const record = {
+    id: generateId(),
+    workflowKey,
+    timestamp: Date.now(),
+    label,
+    nodeCount: nodes.length,
+    graphData,
+    locked: false,
+    source: "node",
+    changeType,
+    parentId,
+    ...(captureDiff ? { captureDiff } : {}),
+    ...(thumbnail ? { thumbnail } : {}),
+};
+```
+
+**Step 4: Commit**
+```bash
+git add js/snapshot_manager.js
+git commit -m "Compute and store diff summary at capture time"
+```
+
+---
+
+### Task 4: Show diff in sidebar hover tooltip
+
+**Files:**
+- Modify: `js/snapshot_manager.js:3573-3603` (mouseenter handler in sidebar)
+
+**Step 1: Add diff lines to tooltip**
+
+Current mouseenter callback (lines 3572-3608) renders an SVG or thumbnail then positions/shows the tooltip. After the SVG/thumbnail is appended (right before the `rect` / positioning block), add diff lines:
+
+Locate this block in the mouseenter callback:
+```js
+                    if (!tooltipTimer) return;
+                    const svg = getCachedSVG(rec.id, graphData, { width: 240, height: 180 });
+                    if (!svg) return;
+                    tooltip.appendChild(svg);
+                }
+                const rect = item.getBoundingClientRect();
+```
+
+Change to:
+```js
+                    if (!tooltipTimer) return;
+                    const svg = getCachedSVG(rec.id, graphData, { width: 240, height: 180 });
+                    if (!svg) return;
+                    tooltip.appendChild(svg);
+                }
+                // Diff summary lines
+                const diffLines = formatCaptureDiffLines(rec.captureDiff);
+                if (diffLines.length > 0) {
+                    const diffEl = document.createElement("div");
+                    diffEl.style.cssText = "margin-top:6px;font-size:11px;line-height:1.5;color:#ccc;white-space:pre;";
+                    diffEl.textContent = diffLines.join("\n");
+                    tooltip.appendChild(diffEl);
+                }
+                const rect = item.getBoundingClientRect();
+```
+
+**Step 2: Verify manually in browser**
+- Create a snapshot by adding a node → hover it in sidebar → tooltip shows SVG preview + diff lines like `+ KSampler`
+- Create a snapshot by changing a param → hover it → tooltip shows `~ KSampler (1 value)`
+- Hover an old snapshot without captureDiff → tooltip shows SVG only (no crash)
+
+**Step 3: Commit**
+```bash
+git add js/snapshot_manager.js
+git commit -m "Show diff summary in sidebar hover tooltip"
+```
+
+---
+
+### Task 5: Show diff in timeline marker tooltip
+
+**Files:**
+- Modify: `js/snapshot_manager.js:3715-3717` (buildMarker tip construction)
+
+**Step 1: Append diff lines to marker title**
+
+Current code at lines 3715-3717:
+```js
+        let tip = `${rec.label} — ${formatTime(rec.timestamp)}\n${iconInfo.label}`;
+        if (rec.notes) tip += `\n${rec.notes}`;
+        marker.title = tip;
+```
+
+Change to:
+```js
+        let tip = `${rec.label} — ${formatTime(rec.timestamp)}\n${iconInfo.label}`;
+        const diffLines = formatCaptureDiffLines(rec.captureDiff);
+        if (diffLines.length > 0) tip += `\n${diffLines.join("\n")}`;
+        if (rec.notes) tip += `\n${rec.notes}`;
+        marker.title = tip;
+```
+
+**Step 2: Verify manually in browser**
+- Hover a timeline marker → native tooltip shows label, time, change type, then diff lines
+
+**Step 3: Commit**
+```bash
+git add js/snapshot_manager.js
+git commit -m "Show diff summary in timeline marker tooltip"
+```