Merge feat/textgate-run-from-here: Text Gate run-from-here + sticky edit

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/plans/2026-06-26-textgate-run-from-here-design.md

@@ -0,0 +1,55 @@
+# Text Gate — "Run from here" + sticky edit (design)
+
+**Goal:** Bring the Text Gate to parity with the Image Gate's "Run from here"
+affordance, plus a text-specific touch: keep the user's edited text across
+re-runs ("start from there").
+
+**Scope:** Frontend only — `web/text_gate.js`. No changes to `gates/textgate.py`,
+`gates/gate_bus.py`, or `gates/gate_server.py`. The gate already re-arms and
+re-pauses on every run (`GateBus.arm` → `wait_payload`) and `IS_CHANGED` returns
+`NaN`, so re-queuing the prompt is enough to "resume": cached upstream means the
+gate re-pauses near-instantly.
+
+## State machine
+
+The node currently has no explicit state. Add three:
+
+- **idle** — before the first run. Pass shown, Run-from-here hidden.
+- **paused** — socket `datasete-textgate-show` arrived. Textarea editable &
+  populated, **▶ Pass** shown, **Run from here** hidden, status `edit, then Pass`.
+- **passed** — after Pass click. Textarea keeps the edited text, **Pass** hidden,
+  **▶ Run from here** shown, status `passed — Run from here to re-run`.
+
+**Run from here** click → `app.queuePrompt(0, 1)` with `app.queuePrompt(0)`
+fallback — copied verbatim from the Image Gate's `queueFromHere`.
+
+## Sticky edited text
+
+The Image Gate keeps its mask sticky; the Text Gate keeps its text. The live
+textarea IS the sticky store, gated by the last-seen input:
+
+- Track `node._tgInput` = the last incoming text the server pushed.
+- On each re-pause with `incoming`:
+  - if `incoming === node._tgInput` (upstream unchanged — the Run-from-here
+    case) → **keep** the current textarea value, so the gate re-runs *your*
+    edited version (including any edits made after Pass).
+  - else (a genuine upstream recompute) → overwrite the textarea with `incoming`.
+  - always set `node._tgInput = incoming`.
+
+Net: "Run from here" re-runs your version, but a real upstream change still
+surfaces instead of hiding behind a stale edit. `_tgInput` is per-session
+(not serialized) — a page reload starts fresh, which is fine.
+
+## Verification
+
+- `node --check web/text_gate.js` (no JS test harness in the repo — consistent
+  with the other `web/*.js`).
+- Manual: pause → edit → Pass → button appears → Run-from-here re-pauses showing
+  your edited text → downstream re-runs; change something upstream → new input
+  shows.
+
+## Dropped (YAGNI)
+
+- A separate "↺ reset to input" button — the upstream-change detection covers the
+  stale-edit footgun.
+- Any backend auto-pass / bypass mode — not requested.

web/text_gate.js

@@ -7,6 +7,12 @@ import { api } from "../../scripts/api.js";
 // the server pushes via the "datasete-textgate-show" socket event and POSTs the
 // edited text back. Outputs are static (text, signal) — no dynamic slots.
 //
+// After Pass, a "▶ Run from here" button re-queues the prompt (Image Gate
+// parity): the gate re-arms every run and IS_CHANGED is NaN, so cached upstream
+// means it re-pauses near-instantly. The edited text is sticky — kept across
+// re-runs while the upstream input is unchanged, so Run-from-here re-runs YOUR
+// version; a genuine upstream change still surfaces the new input.
+//
 // Sizing follows the Image Pool node: the editor is always present and FILLS the
 // node, with only a min-height floor (no max) so the node stays freely resizable
 // and the textarea grows with it.
@@ -28,6 +34,30 @@ async function postPass(node, text) {
   await api.fetchApi(`${R}/pass`, { method: "POST", body: fd });
 }
 
+// ---- run-from-here + state --------------------------------------------------
+// States: "idle" (pre-run), "paused" (waiting for Pass), "passed" (Run-from-here
+// shown). Re-queuing the whole prompt is enough to "resume" — cached upstream
+// re-pauses the gate, matching the Image Gate's queueFromHere.
+
+async function queueFromHere(node) {
+  try {
+    await app.queuePrompt(0, 1);
+  } catch (e) {
+    try { await app.queuePrompt(0); } catch (e2) { console.error("[tgate] queue failed", e2); }
+  }
+}
+
+function setState(node, s) {
+  node._tgState = s;
+  const tg = node._tg;
+  if (!tg) return;
+  tg.pass.style.display = s === "passed" ? "none" : "";
+  tg.runHere.style.display = s === "passed" ? "" : "none";
+  if (s === "paused") tg.status.textContent = "edit, then Pass";
+  else if (s === "passed") tg.status.textContent = "passed — Run from here to re-run";
+  node.setDirtyCanvas?.(true, true);
+}
+
 // ---- sizing (Image Pool pattern) --------------------------------------------
 
 // Only a min-height FLOOR — no max — so the DOM widget fills the node and grows
@@ -59,6 +89,8 @@ function injectStyles() {
                        border:1px solid #555; color:#fff; }
   .tgate-pass { background:rgba(40,130,70,0.95); }
   .tgate-pass:hover { background:rgba(55,160,90,0.98); }
+  .tgate-run { background:rgba(40,90,140,0.95); }
+  .tgate-run:hover { background:rgba(60,120,180,0.98); }
   .tgate-status { font-size:11px; opacity:0.6; margin-left:auto; }
   `;
   const style = document.createElement("style");
@@ -81,21 +113,37 @@ function setupTextGateNode(node) {
 
   const btns = document.createElement("div");
   btns.className = "tgate-btns";
+
   const pass = document.createElement("button");
   pass.className = "tgate-pass";
   pass.textContent = "▶ Pass";
-  const status = document.createElement("span");
-  status.className = "tgate-status";
   pass.onclick = async () => {
     await postPass(node, area.value);
-    status.textContent = "passed";
+    setState(node, "passed");
   };
+
+  // Re-queue the prompt; cached upstream re-pauses the gate so you can run your
+  // edited text downstream again without recomputing the graph above it.
+  const runHere = document.createElement("button");
+  runHere.className = "tgate-run";
+  runHere.textContent = "▶ Run from here";
+  runHere.style.display = "none";
+  runHere.onclick = async () => {
+    node._tg.status.textContent = "re-running…";
+    await queueFromHere(node);
+  };
+
+  const status = document.createElement("span");
+  status.className = "tgate-status";
+
   btns.appendChild(pass);
+  btns.appendChild(runHere);
   btns.appendChild(status);
 
   wrap.appendChild(area);
   wrap.appendChild(btns);
-  node._tg = { wrap, area, status };
+  node._tg = { wrap, area, status, pass, runHere };
+  node._tgState = "idle";
 
   // FILLS the node: floor-only min height, no max (Image Pool pattern).
   node._tgWidget = node.addDOMWidget("textgate_editor", "div", wrap, {
@@ -125,10 +173,15 @@ app.registerExtension({
       const d = e.detail || {};
       const node = app.graph?.getNodeById?.(parseInt(d.id, 10));
       if (!node || node.type !== NODE || !node._tg) return;
-      node._tg.area.value = d.text || "";
+      const incoming = d.text || "";
-      node._tg.status.textContent = "edit, then Pass";
+      // Sticky edit: keep the current editor text when the upstream input is
+      // unchanged (the Run-from-here case, upstream cached), so the gate re-runs
+      // YOUR version. Only overwrite on a genuine upstream change.
+      const unchanged = node._tgInput !== undefined && incoming === node._tgInput;
+      if (!unchanged) node._tg.area.value = incoming;
+      node._tgInput = incoming;
+      setState(node, "paused");
       try { node._tg.area.focus(); } catch (err) { /* ignore */ }
-      node.setDirtyCanvas?.(true, true);
     });
   },