From cc257eebf2a546988ab4e40ab15c5ec6f4eaefe1 Mon Sep 17 00:00:00 2001
From: Implementer <implementer@blust.ch>
Date: Wed, 14 Oct 2026 06:29:37 +0200
Subject: [PATCH] Takes design v0.156.0 and robertblust/mental-model de6fa13

The re-pin moves @robertblust/design from v0.155.0 to v0.156.0 and robertblust/mental-model in source.json from 43dfa37 to de6fa13, in one commit so the privacy page and the code agree. The chat keeps the panel's size in localStorage from this release, and the model's chat-size entry now says local-storage, so the privacy page lists it under kept in your browser rather than in this tab. A link's question waits right after the intro's prompt line and keeps the focus when the page sets its language. chat.js and the theme boot fence are the synced files that change; the pages, pictures and stamps follow them.

Verified: the lockfile resolves @robertblust/design to the tag's commit; npm run design, npm run model, pages, pictures, pages, og and sitemap ran; every command of pins.json's verify list passed locally.

Process: Delivery
Phase: Implement
Track: Code
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 blog/deciding-well-solved/index.html  |  9 +++---
 blog/deciding-well-solved/og.sha      |  2 +-
 blog/index.html                       |  9 +++---
 blog/og.sha                           |  2 +-
 blog/one-question-answered/index.html |  9 +++---
 blog/one-question-answered/og.sha     |  2 +-
 chat.js                               | 41 +++++++++++++++++----------
 ideas/index.html                      |  9 +++---
 ideas/og.sha                          |  2 +-
 index.html                            |  9 +++---
 model.json                            |  5 ++--
 model/index.html                      |  9 +++---
 model/og.sha                          |  2 +-
 og.sha                                |  2 +-
 package-lock.json                     |  6 ++--
 package.json                          |  2 +-
 principles/index.html                 | 11 +++----
 principles/og.sha                     |  2 +-
 privacy/index.html                    | 13 +++++----
 privacy/og.sha                        |  2 +-
 processes/index.html                  |  9 +++---
 processes/og.sha                      |  2 +-
 processes/pictures/answering.sha      |  2 +-
 processes/pictures/deciding.sha       |  2 +-
 processes/pictures/delivery.sha       |  2 +-
 processes/pictures/narrating.sha      |  2 +-
 sitemap.xml                           | 32 ++++++++++-----------
 source.json                           |  2 +-
 surfaces/index.html                   | 11 +++----
 surfaces/og.sha                       |  2 +-
 talks/deciding-well/cost/index.html   |  9 +++---
 talks/deciding-well/cost/og.sha       |  2 +-
 talks/deciding-well/index.html        |  9 +++---
 talks/deciding-well/og.sha            |  2 +-
 talks/essential-complexity/index.html |  9 +++---
 talks/essential-complexity/og.sha     |  2 +-
 talks/index.html                      |  9 +++---
 talks/mental-model/index.html         |  9 +++---
 talks/mental-model/og.sha             |  2 +-
 talks/og.sha                          |  2 +-
 timeline/index.html                   |  9 +++---
 timeline/og.sha                       |  2 +-
 42 files changed, 154 insertions(+), 126 deletions(-)

diff --git a/blog/deciding-well-solved/index.html b/blog/deciding-well-solved/index.html
index 2fc28acc..1de19b4c 100644
--- a/blog/deciding-well-solved/index.html
+++ b/blog/deciding-well-solved/index.html
@@ -144,7 +144,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -187,13 +187,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/blog/deciding-well-solved/og.sha b/blog/deciding-well-solved/og.sha
index a459b1b4..622307c7 100644
--- a/blog/deciding-well-solved/og.sha
+++ b/blog/deciding-well-solved/og.sha
@@ -1 +1 @@
-6fa00f1cdf203c25416e3789de3483bd459c6e42a49810cb723b4cb268b8ee6e
+bd374b662595438d2a64b876e5b5be50461e7bead089ad51c80660101ab023c8
diff --git a/blog/index.html b/blog/index.html
index b9df63d3..76edc191 100644
--- a/blog/index.html
+++ b/blog/index.html
@@ -112,7 +112,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -155,13 +155,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/blog/og.sha b/blog/og.sha
index a8e45e34..11d4d35a 100644
--- a/blog/og.sha
+++ b/blog/og.sha
@@ -1 +1 @@
-4c74b15f0943d1b60a4d319cb06d996d7580050c0816de6c4a2345d0518f161f
+159693450fffd0499d27c4771bd1fef9d4fdea78dc8132077fc431dd9e2fe1e0
diff --git a/blog/one-question-answered/index.html b/blog/one-question-answered/index.html
index 0cb2521c..4cd8892a 100644
--- a/blog/one-question-answered/index.html
+++ b/blog/one-question-answered/index.html
@@ -144,7 +144,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -187,13 +187,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/blog/one-question-answered/og.sha b/blog/one-question-answered/og.sha
index ee70b5ac..cca29a24 100644
--- a/blog/one-question-answered/og.sha
+++ b/blog/one-question-answered/og.sha
@@ -1 +1 @@
-7514dd0b7f23a7b742a614cdd79dd9b5814c6feef5140629cac77fd2e2fc9395
+fc05950ec498af33cfe68fe0052ac42617ff4bcb4967ec3071eb751ec45d8b5a
diff --git a/chat.js b/chat.js
index 650e6b7f..2ea29137 100644
--- a/chat.js
+++ b/chat.js
@@ -714,10 +714,11 @@
   // rendered, each answer with the entities it cited. Every access is wrapped, because a
   // browser with site data blocked throws on the first read and the chat still has to work.
   var STORE_KEY = "chat";
-  // How big the panel is, kept beside the conversation and for the same lifetime: a size is a
-  // choice about this tab's reading, not a preference to carry to the next visit, and the
-  // conversation it frames goes when the tab goes. Its own key, because it outlives any one
-  // conversation: a visitor who sizes the panel, empties it and asks again keeps the size.
+  // How big the panel is, kept in `localStorage` as `lang` and `theme` are: a size is a choice
+  // about how this visitor reads the chat on this screen, so it holds in every tab and on the
+  // next visit, where the conversation it frames goes when its tab goes. Its own key, because it
+  // is no part of any conversation: a link opened in a new tab finds the panel at the size the
+  // visitor gave it, with nothing else carried over.
   var SIZE_KEY = "chat-size";
   var MIN_W = 320, MIN_H = 260, STEP = 24;
   function stored(){
@@ -725,10 +726,10 @@
     catch (e) { return null; }
   }
   function storedSize(){
-    try { var raw = sessionStorage.getItem(SIZE_KEY); var v = raw ? JSON.parse(raw) : null; return v && v.w && v.h ? v : null; }
+    try { var raw = localStorage.getItem(SIZE_KEY); var v = raw ? JSON.parse(raw) : null; return v && v.w && v.h ? v : null; }
     catch (e) { return null; }
   }
-  function keepSize(w, h){ try { sessionStorage.setItem(SIZE_KEY, JSON.stringify({ w: w, h: h })); } catch (e) {} }
+  function keepSize(w, h){ try { localStorage.setItem(SIZE_KEY, JSON.stringify({ w: w, h: h })); } catch (e) {} }
 
   // Where the visitor was reading, kept with the conversation so the back button returns them
   // to it and not to the end. A place is a turn and a distance into its bubble, not a pixel
@@ -1872,9 +1873,10 @@
   var introPick = null;
   // The question a link carries, waiting: a card the visitor acts on, built from the strings and
   // never from markup, so whatever the link says is shown as text. Send hands it to send() as if
-  // typed, Edit puts it in the input to change, and Discard drops it. Under the notice while the
-  // intro stands, since that is what the visitor reads first; at the end of a conversation the
-  // tab already holds, since the intro is then out of sight above it.
+  // typed, Edit puts it in the input to change, and Discard drops it. It stands right after the
+  // intro's prompt line, where a question the visitor typed would stand, so the hello, the notice
+  // and what the panel offers read in the order they always do and the question is the last thing
+  // in the log; at the end of a conversation the tab already holds, for the same reason.
   function askCard(){
     var s = strings(langNow()).ask, card = el("div", "rbchat-ask"), row = el("div", "rbchat-ask-row");
     card.setAttribute("role", "group"); card.setAttribute("aria-label", s.label);
@@ -1892,9 +1894,10 @@
     askEl = card;
     return card;
   }
+  // Wherever the card stands it is the last thing in the log, so the log's end is where it shows.
   function showAsk(){
-    if (!linkAsk || (askEl && askEl.isConnected)) return;
-    log.appendChild(askCard());
+    if (!linkAsk) return;
+    if (!(askEl && askEl.isConnected)) log.appendChild(askCard());
     log.scrollTop = log.scrollHeight;
   }
 
@@ -1919,11 +1922,11 @@
     hello.appendChild(el("span", "rbchat-h2", lines[1]));
     introEl.appendChild(hello);
     notice = el("p", "rbchat-notice"); introEl.appendChild(notice); writeNotice();
-    if (linkAsk && !messages.length) introEl.appendChild(askCard());
     var groups = el("div", "rbchat-groups"); introEl.appendChild(groups);
     var promptLine = el("p", "rbchat-prompt-line", "› " + s.prompt + " ");
     // The block cursor waits here while the intro plays, and hands over to the command line.
     promptLine.appendChild(el("span", "rbchat-cur")); introEl.appendChild(promptLine);
+    if (linkAsk && !messages.length) introEl.appendChild(askCard());
     log.insertBefore(introEl, log.firstChild);
     if (!play || still()) finishIntro();
     facts(function(f){
@@ -1956,6 +1959,8 @@
         // A restored conversation has moved past the intro: its menus are spent, and the rows a
         // number picks stay those of the menu after the last answer.
         if (messages.length) spendIntro(); else { menuRows = rows.concat(picked).map(function(r){ return r[0]; }); keysLine(); }
+        // The menus are drawn above a waiting question and would push it out of sight.
+        if (askEl && askEl.parentNode === introEl) log.scrollTop = log.scrollHeight;
         if (!introEl.classList.contains("rbchat-still")) playIntro();
       });
     });
@@ -2080,7 +2085,13 @@
       for (var b = 0; b < labels.length; b++) labels[b].textContent = strings(answerLang(turns, langNow())).askNext;
     }
     // A language switch redraws the intro in the new language, finished, where the log holds one.
-    if (introEl && log) { var keep_ = log.scrollTop; introEl.parentNode && introEl.parentNode.removeChild(introEl); introEl = null; intro(false); log.scrollTop = keep_; }
+    // A waiting question is redrawn with it, and the button that held the focus holds it again:
+    // a page sets its language after the panel has opened, and Enter still has to send.
+    if (introEl && log) {
+      var keep_ = log.scrollTop, held = askEl && askEl.contains(document.activeElement) ? Array.prototype.indexOf.call(askEl.querySelectorAll("button"), document.activeElement) : -1;
+      introEl.parentNode && introEl.parentNode.removeChild(introEl); introEl = null; intro(false); log.scrollTop = keep_;
+      if (held >= 0 && askEl) askEl.querySelectorAll("button")[held].focus({ preventScroll: true });
+    }
     // The chips standing under an answer are drawn again from the titles they were picked as, so a
     // model question reads in the new language and a number key sends what its row now shows.
     if (qBox && qPicked && qPicked.length) { var was_ = qPicked.slice(); hideQuestions(); offer(was_); }
@@ -2111,7 +2122,7 @@
     // something to clear: an empty panel shows no control for emptying it. A conversation has no
     // length at which it must start over, so this is the only door; its reset takes the turns,
     // the log and the tab's copy together; the panel's size stays, being a choice
-    // about this tab's reading rather than part of the conversation.
+    // about how the visitor reads rather than part of the conversation.
     newBtn = el("button", "rbchat-new"); newBtn.type = "button"; newBtn.hidden = true;
     // The glyph is an arrow come back round, not a plus: a plus beside the cross read as "add",
     // and what the button does is start over. The note under it names the action for a pointer
@@ -2206,7 +2217,7 @@
     // Double-click gives the stylesheet's size back and forgets the stored one, as the stage's
     // gutter does: otherwise the only way back is to drag until it looks right again.
     grip.addEventListener("dblclick", function(){
-      try { sessionStorage.removeItem(SIZE_KEY); } catch (e) {}
+      try { localStorage.removeItem(SIZE_KEY); } catch (e) {}
       unsize();
     });
     grip.addEventListener("keydown", function(ev){
diff --git a/ideas/index.html b/ideas/index.html
index ac2ae6c6..43194271 100644
--- a/ideas/index.html
+++ b/ideas/index.html
@@ -114,7 +114,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -157,13 +157,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/ideas/og.sha b/ideas/og.sha
index b23fd912..aeada1b6 100644
--- a/ideas/og.sha
+++ b/ideas/og.sha
@@ -1 +1 @@
-b30dad0b99c88d8c2f85d54492fec35d4fe49b86823539cc1f38fa32f85a457d
+c453eaff43ce4168ffa28bb87db19fe0d41e591b8dbeb64cbe78eea14189e1b9
diff --git a/index.html b/index.html
index c7a50ed7..86892876 100644
--- a/index.html
+++ b/index.html
@@ -91,7 +91,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -134,13 +134,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/model.json b/model.json
index 423cd058..18e298b7 100644
--- a/model.json
+++ b/model.json
@@ -1,5 +1,5 @@
 {
-  "commit": "43dfa37bb4fa92ca6fe2a6a311b3f80c1d135158",
+  "commit": "de6fa1327af126b53af0c88de385592d8ba1b6a2",
   "core": "0.69.0",
   "root": "Robert Blust",
   "rootId": "01a04c85-bc20-7849-9ec1-d877215d70b4",
@@ -20070,8 +20070,9 @@
       "fields": {
         "id": "01a108dd-6751-7040-bd3c-4bb5ecf70bc6",
         "source": "Local",
-        "mechanism": "session-storage",
+        "mechanism": "local-storage",
         "necessity": "optional",
+        "duration": "Until the visitor clears it",
         "surfaces": [
           "chat.blust.ch chat"
         ]
diff --git a/model/index.html b/model/index.html
index 18dc5e9c..babeb4b0 100644
--- a/model/index.html
+++ b/model/index.html
@@ -111,7 +111,7 @@
 <!-- Publisher and page, nothing about the product. The same rule the other two pages
      follow: structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -154,13 +154,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/model/og.sha b/model/og.sha
index 4bce8b82..61045ad2 100644
--- a/model/og.sha
+++ b/model/og.sha
@@ -1 +1 @@
-707f659fa51df4fed37b442ae534a135cabacb3783a2da957793560f9ae4850c
+f5d058c57b8eaf551a82868e0f800b4f484bf1605c84eb216c34b46ba7f0292f
diff --git a/og.sha b/og.sha
index b68e9ddb..9a574890 100644
--- a/og.sha
+++ b/og.sha
@@ -1 +1 @@
-aa62036005892c1af005b70c23a499fa6d079257639c3af520c3cd51951f0a40
+49b0520b27bf571c8eafd5d34fc33f6a0014f6e543df2de49437efdb31b82c0b
diff --git a/package-lock.json b/package-lock.json
index 974b1333..04e167a0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
         "companygraph-meta-model": "github:companygraph/meta-model#v0.94.0"
       },
       "devDependencies": {
-        "@robertblust/design": "github:robertblust/design#v0.155.0",
+        "@robertblust/design": "github:robertblust/design#v0.156.0",
         "companygraph-mcp-server": "github:companygraph/mcp-server#v0.69.0",
         "pdf-lib": "^1.17.1",
         "playwright": "^1.63.0"
@@ -95,8 +95,8 @@
       }
     },
     "node_modules/@robertblust/design": {
-      "version": "0.155.0",
-      "resolved": "git+ssh://git@github.com/robertblust/design.git#6f4c29b1e307f3e982537ca2e132f8adb15bd895",
+      "version": "0.156.0",
+      "resolved": "git+ssh://git@github.com/robertblust/design.git#e9ae31386c3af4f16cd1f83faa0df5514ff56f6a",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index f613416f..9bd061e4 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "pin:check": "node pin-check.mjs"
   },
   "devDependencies": {
-    "@robertblust/design": "github:robertblust/design#v0.155.0",
+    "@robertblust/design": "github:robertblust/design#v0.156.0",
     "companygraph-mcp-server": "github:companygraph/mcp-server#v0.69.0",
     "pdf-lib": "^1.17.1",
     "playwright": "^1.63.0"
diff --git a/principles/index.html b/principles/index.html
index 60eca47e..b5c2a9dc 100644
--- a/principles/index.html
+++ b/principles/index.html
@@ -111,7 +111,7 @@
 <!-- Publisher and page, nothing about the product. The same rule the other two pages
      follow: structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -154,13 +154,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
@@ -334,7 +335,7 @@ <h3 data-de="Die Produktion ist das Ziel">Production is the finish line</h3>
       </article>
     </section>
 
-    <p class="derived" data-de="Erzeugt aus <a href='https://github.com/robertblust/mental-model'>robertblust/mental-model</a>@43dfa37 – <code class='mono'>model/vision.md</code> und <code class='mono'>model/values/</code>. Dieses Repository ist eine Instanz von <a href='https://companygraph.io/'>CompanyGraph</a>, einem Meta-Modell, das ein Unternehmen als Graph aus Markdown beschreibt.">Generated from <a href="https://github.com/robertblust/mental-model">robertblust/mental-model</a>@43dfa37 — <code class="mono">model/vision.md</code> and <code class="mono">model/values/</code>. That repository is an instance of <a href="https://companygraph.io/">CompanyGraph</a>, a meta-model for describing a company as a graph of Markdown.</p>
+    <p class="derived" data-de="Erzeugt aus <a href='https://github.com/robertblust/mental-model'>robertblust/mental-model</a>@de6fa13 – <code class='mono'>model/vision.md</code> und <code class='mono'>model/values/</code>. Dieses Repository ist eine Instanz von <a href='https://companygraph.io/'>CompanyGraph</a>, einem Meta-Modell, das ein Unternehmen als Graph aus Markdown beschreibt.">Generated from <a href="https://github.com/robertblust/mental-model">robertblust/mental-model</a>@de6fa13 — <code class="mono">model/vision.md</code> and <code class="mono">model/values/</code>. That repository is an instance of <a href="https://companygraph.io/">CompanyGraph</a>, a meta-model for describing a company as a graph of Markdown.</p>
     <!-- principles:end -->
   </div>
 </main>
diff --git a/principles/og.sha b/principles/og.sha
index 0ad696e9..dd361e8a 100644
--- a/principles/og.sha
+++ b/principles/og.sha
@@ -1 +1 @@
-e79443fb34b1199b894cf7d7c73ee299c2e8b83ede682ab20382a046de6e2d57
+f45905b861b5f56bb3f0ac6491144203cc73a6e6b237d8c6dfafad7bfd84e0b1
diff --git a/privacy/index.html b/privacy/index.html
index 5130f5b5..e60c0b8c 100644
--- a/privacy/index.html
+++ b/privacy/index.html
@@ -111,7 +111,7 @@
 <!-- Publisher and page, nothing about the product. The same rule the other two pages
      follow: structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -154,13 +154,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
@@ -332,11 +333,12 @@ <h2 data-de="Wohin Ihre Daten gehen">Where your data goes</h2>
       <!-- privacy:start -->
       <div class="lineage" id="lineage">
         <svg class="wires" id="wires" aria-hidden="true"></svg>
-        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Auf blust.ch">On blust.ch</div><div class="nm" data-de="Ihr Besuch">Your visit</div><div class="at mono">@43dfa37</div></div>
+        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Auf blust.ch">On blust.ch</div><div class="nm" data-de="Ihr Besuch">Your visit</div><div class="at mono">@de6fa13</div></div>
         <ul class="ln-groups">
           <li class="ln-group hand">
             <div class="ln-maker" data-maker="local-storage"><svg class="mk hand" aria-hidden="true"><use href="#m-hand"/></svg><span class="who"><span data-de="In Ihrem Browser gespeichert">Kept in your browser</span><span class="how" data-de="bis Sie die Daten löschen · nie automatisch übermittelt">until you clear it · never sent on its own</span></span></div>
             <ul class="ln-surfaces">
+              <li><button class="ln-s" type="button" id="key-chat-size" data-id="01a108dd-6751-7040-bd3c-4bb5ecf70bc6" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-size</span><span class="host" data-de="Wie gross Sie das Chatfenster eingestellt haben, in Pixeln">How big the visitor made the chat panel, in pixels</span></button></li>
               <li><button class="ln-s" type="button" id="key-lang" data-id="01a108dd-0bb2-7a6b-a92b-8c6de9602908" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">lang</span><span class="host" data-de="Die Sprache, die Sie gewählt haben, `de` oder `en`, damit sich die nächste Seite in dieser Sprache öffnet">The language the visitor chose, `de` or `en`, so the next page opens in it</span></button></li>
               <li><button class="ln-s" type="button" id="key-stage-card" data-id="01a108dd-29bb-723d-9a2c-fe0910a7b464" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">stage-card</span><span class="host" data-de="Wie breit Sie den Detailbereich auf den Modellseiten eingestellt haben, in Pixeln">How wide the visitor left the details panel on the model pages, in pixels</span></button></li>
               <li><button class="ln-s" type="button" id="key-stage-card-modal" data-id="01a108dd-38e2-7844-ac0c-00ab3e326e58" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">stage-card-modal</span><span class="host" data-de="Wie breit Sie den Detailbereich in der vergrösserten Ansicht eingestellt haben, in Pixeln">How wide the visitor left the details panel in the expanded view, in pixels</span></button></li>
@@ -350,7 +352,6 @@ <h2 data-de="Wohin Ihre Daten gehen">Where your data goes</h2>
               <li><button class="ln-s" type="button" id="key-chat" data-id="01a108dd-57ad-70ae-b4ef-65a0a7e66708" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat</span><span class="host" data-de="Das Gespräch in diesem Tab, damit es nicht verloren geht, wenn Sie einem Link folgen">The conversation in this tab, so following a link does not lose it</span></button></li>
               <li><button class="ln-s" type="button" id="key-chat-facts" data-id="01a108dd-85a4-7a5b-8055-872abe683db8" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-facts</span><span class="host" data-de="Was der Chat aus der Datei des Modells gelesen hat, um Fragen vorzuschlagen. So zeigt die nächste Seite diese Fragen sofort an">What the chat read from the model's file to offer its questions, so the next page draws them at once</span></button></li>
               <li><button class="ln-s" type="button" id="key-chat-pictures" data-id="01a108dd-7686-73f5-bffd-e044b4dde4f2" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-pictures</span><span class="host" data-de="Die Diagramme, die der Chat in diesem Tab in seinen Antworten gezeichnet hat">The figures the chat drew in its answers in this tab</span></button></li>
-              <li><button class="ln-s" type="button" id="key-chat-size" data-id="01a108dd-6751-7040-bd3c-4bb5ecf70bc6" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-size</span><span class="host" data-de="Wie gross Sie das Chatfenster eingestellt haben, in Pixeln">How big the visitor made the chat panel, in pixels</span></button></li>
             </ul>
           </li>
           <li class="ln-group">
diff --git a/privacy/og.sha b/privacy/og.sha
index 83863961..bafcb975 100644
--- a/privacy/og.sha
+++ b/privacy/og.sha
@@ -1 +1 @@
-c670123abdc99b960df5de7ad84f5d419995fbc030c2e8898567f894fd9f214f
+7fe64499c47835e939288df92bc1f361a7b5a82b1457756966280895300c5b4a
diff --git a/processes/index.html b/processes/index.html
index 2792fe85..688bf29d 100644
--- a/processes/index.html
+++ b/processes/index.html
@@ -111,7 +111,7 @@
 <!-- Publisher and page, nothing about the product. The same rule the other two pages
      follow: structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -154,13 +154,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/processes/og.sha b/processes/og.sha
index c9395ddd..e644e884 100644
--- a/processes/og.sha
+++ b/processes/og.sha
@@ -1 +1 @@
-8a245cf534e368f22fa3b2a869810f07a614029a1174a43fa903080d94932f4b
+2221bcc0b19df3bb7b73174860ea24a8e7861b5b9dffe65abf28cb8d5189b4de
diff --git a/processes/pictures/answering.sha b/processes/pictures/answering.sha
index 0483f1ae..013e4844 100644
--- a/processes/pictures/answering.sha
+++ b/processes/pictures/answering.sha
@@ -1 +1 @@
-519eca92166807f07e15eb5d5fbbf4582a62459d88881c2fd88312b2423ee209
+0c1587a3775758e5b0626b341b7fa95f965cc537883680b46af27aeff7da2a1a
diff --git a/processes/pictures/deciding.sha b/processes/pictures/deciding.sha
index c477572a..8c879157 100644
--- a/processes/pictures/deciding.sha
+++ b/processes/pictures/deciding.sha
@@ -1 +1 @@
-603c86b7b45be2b9637456c3986e9dd27254dda63f3b1756be2072929760d7cf
+409e060f268e4666a4c8387b461b036e90fc0f6497d2d0c1f3a80cf7986f385f
diff --git a/processes/pictures/delivery.sha b/processes/pictures/delivery.sha
index 074134eb..86be0622 100644
--- a/processes/pictures/delivery.sha
+++ b/processes/pictures/delivery.sha
@@ -1 +1 @@
-04f0a2a1a6649a0758bf64449d8f48c0a5b8c6487dfca869545f7eb05bd57128
+9094e5aa366fc0ef85623580f0122c966b5aaa131caae7d1e02e3a398f5b6d2c
diff --git a/processes/pictures/narrating.sha b/processes/pictures/narrating.sha
index 1fbdd55b..ce1f0d91 100644
--- a/processes/pictures/narrating.sha
+++ b/processes/pictures/narrating.sha
@@ -1 +1 @@
-70e95eb3f2d5ca1bf17f29c46cfcb7230efd30aa0f089dbdbec03bd4432f323c
+2bc856258c3d6e62b4af12868805df3b254933dd4a2086f275d04b0932d9acea
diff --git a/sitemap.xml b/sitemap.xml
index 6a35262c..df9c4cdc 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -1,19 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
-  <url><loc>https://blust.ch/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>1.0</priority></url>
-  <url><loc>https://blust.ch/talks/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/talks/mental-model/</loc><lastmod>2026-10-04</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
-  <url><loc>https://blust.ch/talks/essential-complexity/</loc><lastmod>2026-10-04</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
-  <url><loc>https://blust.ch/talks/deciding-well/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
-  <url><loc>https://blust.ch/talks/deciding-well/cost/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>0.7</priority></url>
-  <url><loc>https://blust.ch/blog/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/blog/one-question-answered/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
-  <url><loc>https://blust.ch/blog/deciding-well-solved/</loc><lastmod>2026-10-08</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
-  <url><loc>https://blust.ch/principles/</loc><lastmod>2026-10-13</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/model/</loc><lastmod>2026-10-13</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/surfaces/</loc><lastmod>2026-10-13</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/processes/</loc><lastmod>2026-10-13</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/timeline/</loc><lastmod>2026-10-13</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
-  <url><loc>https://blust.ch/privacy/</loc><lastmod>2026-10-13</lastmod></url>
-  <url><loc>https://blust.ch/ideas/</loc><lastmod>2026-10-11</lastmod></url>
+  <url><loc>https://blust.ch/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>1.0</priority></url>
+  <url><loc>https://blust.ch/talks/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/talks/mental-model/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
+  <url><loc>https://blust.ch/talks/essential-complexity/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
+  <url><loc>https://blust.ch/talks/deciding-well/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
+  <url><loc>https://blust.ch/talks/deciding-well/cost/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.7</priority></url>
+  <url><loc>https://blust.ch/blog/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/blog/one-question-answered/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
+  <url><loc>https://blust.ch/blog/deciding-well-solved/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.9</priority></url>
+  <url><loc>https://blust.ch/principles/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/model/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/surfaces/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/processes/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/timeline/</loc><lastmod>2026-10-14</lastmod><changefreq>monthly</changefreq><priority>0.8</priority></url>
+  <url><loc>https://blust.ch/privacy/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://blust.ch/ideas/</loc><lastmod>2026-10-14</lastmod></url>
 </urlset>
diff --git a/source.json b/source.json
index bc8c76fe..77d12b6a 100644
--- a/source.json
+++ b/source.json
@@ -1 +1 @@
-{"repo":"robertblust/mental-model","commit":"43dfa37bb4fa92ca6fe2a6a311b3f80c1d135158"}
\ No newline at end of file
+{"repo":"robertblust/mental-model","commit":"de6fa1327af126b53af0c88de385592d8ba1b6a2"}
\ No newline at end of file
diff --git a/surfaces/index.html b/surfaces/index.html
index 49b9a29d..207c7918 100644
--- a/surfaces/index.html
+++ b/surfaces/index.html
@@ -111,7 +111,7 @@
 <!-- Publisher and page, nothing about the product. The same rule the other two pages
      follow: structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -154,13 +154,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
@@ -348,7 +349,7 @@ <h1 data-de="<span class='r70'>Ein Modell,</span><span class='rcl'>jede <em>Surf
       <!-- surfaces:start -->
       <div class="lineage" id="lineage">
         <svg class="wires" id="wires" aria-hidden="true"></svg>
-        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Das Modell">The model</div><div class="nm">mental-model</div><div class="at mono">@43dfa37</div></div>
+        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Das Modell">The model</div><div class="nm">mental-model</div><div class="at mono">@de6fa13</div></div>
         <ul class="ln-groups">
           <li class="ln-group hand">
             <div class="ln-maker" data-maker="hand"><svg class="mk hand" aria-hidden="true"><use href="#m-hand"/></svg><span class="who"><span data-de="Der Owner">The owner</span><span class="how" data-de="von Hand">by hand</span></span></div>
diff --git a/surfaces/og.sha b/surfaces/og.sha
index 05034a17..73cd911e 100644
--- a/surfaces/og.sha
+++ b/surfaces/og.sha
@@ -1 +1 @@
-97fc0c01f51470190bf67198d79489d6ad3641d1255c1965b8583fc623981ba2
+b592f2a14943bcebe661077b4f365787d797a668f19e444d5e5fb3ab5ba7fc36
diff --git a/talks/deciding-well/cost/index.html b/talks/deciding-well/cost/index.html
index 3ccef216..be1074fe 100644
--- a/talks/deciding-well/cost/index.html
+++ b/talks/deciding-well/cost/index.html
@@ -123,7 +123,7 @@
 <!-- Publisher and page, nothing about the product. The same rule every page here follows:
      structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -166,13 +166,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/deciding-well/cost/og.sha b/talks/deciding-well/cost/og.sha
index a48e472c..f195badb 100644
--- a/talks/deciding-well/cost/og.sha
+++ b/talks/deciding-well/cost/og.sha
@@ -1 +1 @@
-1ec8af61a4ccfaed4252a64fc8068deebc42536cfb73e05c87621278f3727a56
+3b333865ff23a1a27ef5efa792624358fa0ab9c0638c5f215f6de31c8d962b5c
diff --git a/talks/deciding-well/index.html b/talks/deciding-well/index.html
index f0fff8e6..af02275e 100644
--- a/talks/deciding-well/index.html
+++ b/talks/deciding-well/index.html
@@ -127,7 +127,7 @@
 </script>
 <meta name="author" content="Robert Blust">
 <script>
-  /* ─── theme boot · v5 · deck ────────────────────────────────────
+  /* ─── theme boot · v6 · deck ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -170,13 +170,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/deciding-well/og.sha b/talks/deciding-well/og.sha
index 4d7d3b9c..c788e670 100644
--- a/talks/deciding-well/og.sha
+++ b/talks/deciding-well/og.sha
@@ -1 +1 @@
-ffd46848ee90e20c6f2c25f0afaa69a7fc3d36ccc582fc1479016431c2de35ec
+05996824a33517ccdc77d13b535262f3e5f7f50eccfc99f733b7adb5d265bc38
diff --git a/talks/essential-complexity/index.html b/talks/essential-complexity/index.html
index a692b16d..b41a058f 100644
--- a/talks/essential-complexity/index.html
+++ b/talks/essential-complexity/index.html
@@ -127,7 +127,7 @@
 </script>
 <meta name="author" content="Robert Blust">
 <script>
-  /* ─── theme boot · v5 · deck ────────────────────────────────────
+  /* ─── theme boot · v6 · deck ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -170,13 +170,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/essential-complexity/og.sha b/talks/essential-complexity/og.sha
index 4379737e..2877c6fe 100644
--- a/talks/essential-complexity/og.sha
+++ b/talks/essential-complexity/og.sha
@@ -1 +1 @@
-23f835159ad0855ff2c547d7c4c471c9e73d3566400c8a5812c902cfde2e317d
+3650df75991d160a1d0d12f98849d84f62c269c81157f7b97b11724efe47335a
diff --git a/talks/index.html b/talks/index.html
index c8dc7634..a61eeeb2 100644
--- a/talks/index.html
+++ b/talks/index.html
@@ -112,7 +112,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -155,13 +155,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/mental-model/index.html b/talks/mental-model/index.html
index 493c740c..9c338858 100644
--- a/talks/mental-model/index.html
+++ b/talks/mental-model/index.html
@@ -127,7 +127,7 @@
 </script>
 <meta name="author" content="Robert Blust">
 <script>
-  /* ─── theme boot · v5 · deck ────────────────────────────────────
+  /* ─── theme boot · v6 · deck ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -170,13 +170,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/mental-model/og.sha b/talks/mental-model/og.sha
index 9688ce40..0cbe92ab 100644
--- a/talks/mental-model/og.sha
+++ b/talks/mental-model/og.sha
@@ -1 +1 @@
-0f49afdad21bb3da605526efaf980cf31fb8c33f5f895282024dd2aab96a4fcf
+381954a913af45d6bab25c2d59673790b1bf333516f9e4c5f56f6f1fdabad683
diff --git a/talks/og.sha b/talks/og.sha
index e23457ca..299da8c2 100644
--- a/talks/og.sha
+++ b/talks/og.sha
@@ -1 +1 @@
-410038a971109d33b8cd3a349f129234c2c090802239234250ba2609607a3a85
+d2c70077e7dd93d993eadb5488dca245d73cbebb24948da33adb8aad0f663b84
diff --git a/timeline/index.html b/timeline/index.html
index 4c4eda90..6c17164d 100644
--- a/timeline/index.html
+++ b/timeline/index.html
@@ -111,7 +111,7 @@
 <!-- Publisher and page, nothing about the product. The same rule the other two pages
      follow: structured data is not a back door for claims the prose does not make. -->
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -154,13 +154,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/timeline/og.sha b/timeline/og.sha
index b0ff7874..81879bda 100644
--- a/timeline/og.sha
+++ b/timeline/og.sha
@@ -1 +1 @@
-7f3929012a8a27fcb9a2ed77a8a4167b3c0cc1691c09ece224c701dcbafd65c7
+fe462654c1b661965ce15d6cc1e97e1f0ed1c4c8635c24cfb80fd399be8f2f32