diff --git a/apps/glow/bot/src/chat.js b/apps/glow/bot/src/chat.js
index df1a2942..1433e73d 100644
--- a/apps/glow/bot/src/chat.js
+++ b/apps/glow/bot/src/chat.js
@@ -47,6 +47,7 @@ import { StoppedError, clip, errorText } from "./util.js";
 // ------------------------------------------------------------------ limits
 const STATE_KEY = "chat";
 const RECORD_PREFIX = "rec:";
+export const LEGACY_HISTORY_KEY = "chat:history"; // where the 0.2.0 Worker kept a chat's talk
 
 export const DAILY_JOB_LIMIT = 20; // jobs per chat per day, for everyone except the owner
 export const MAX_CALLS = 24; // AI calls one job may make
@@ -159,6 +160,26 @@ const SIM_REGISTRY = {
   users: async () => ({ ok: true, ownerId: null, access: "private", chats: [] }),
 };
 
+// What a chat's talk becomes once the talk GlowBot 0.2.0 saved is put in front of it (it is the
+// older one). Only what the user and the assistant said is taken, clipped and cut like today's talk,
+// and the talk starts with the user. Anything that is not such a talk changes nothing.
+export function adoptLegacyHistory(old, current) {
+  const today = Array.isArray(current) ? current : [];
+  const taken = (Array.isArray(old) ? old : [])
+    .filter(
+      (entry) =>
+        entry &&
+        (entry.role === "user" || entry.role === "assistant") &&
+        typeof entry.content === "string" &&
+        entry.content.trim() !== "",
+    )
+    .map((entry) => ({ role: entry.role, content: clip(entry.content, HISTORY_CLIP) }));
+  if (!taken.length) return today;
+  const merged = [...taken, ...today].slice(-HISTORY_KEEP);
+  while (merged.length && merged[0].role !== "user") merged.shift();
+  return merged;
+}
+
 function freshState() {
   return {
     v: 1,
@@ -373,8 +394,18 @@ export class ChatLogic {
   load() {
     if (!this.loading) {
       this.loading = (async () => {
-        const saved = await this.storage.get(STATE_KEY);
+        // Both keys come in one read, so a chat with nothing to move over starts exactly as before.
+        const found = await this.storage.get([STATE_KEY, LEGACY_HISTORY_KEY]);
+        const saved = found.get(STATE_KEY);
         this.state = { ...freshState(), ...(saved && typeof saved === "object" ? saved : {}) };
+        // A chat that talked to GlowBot 0.2.0: its talk is moved over once, then the old copy goes,
+        // so /new cannot bring it back.
+        if (found.has(LEGACY_HISTORY_KEY)) {
+          const old = found.get(LEGACY_HISTORY_KEY);
+          this.state.history = adoptLegacyHistory(old, this.state.history);
+          await this.storage.put(STATE_KEY, this.state);
+          await this.storage.delete(LEGACY_HISTORY_KEY);
+        }
         return this.state;
       })();
     }
diff --git a/apps/glow/bot/test/legacy-chat.test.js b/apps/glow/bot/test/legacy-chat.test.js
new file mode 100644
index 00000000..f936d2de
--- /dev/null
+++ b/apps/glow/bot/test/legacy-chat.test.js
@@ -0,0 +1,197 @@
+// A chat that talked to GlowBot 0.2.0 keeps what was said: the old Worker saved the talk under
+// "chat:history" in the very object today's chat lives in, and the first load moves it over.
+
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { GLOWCHAT, did, makeChat } from "./chat-kit.js";
+import { LEGACY_HISTORY_KEY, adoptLegacyHistory } from "../src/chat.js";
+
+const turn = (role, content) => ({ role, content });
+
+// What 0.2.0 left behind after two exchanges.
+const oldTalk = () => [
+  turn("user", "My name is Juwen."),
+  turn("assistant", "Nice to meet you, Juwen."),
+  turn("user", "I live in Batam."),
+  turn("assistant", "Batam it is."),
+];
+
+// A chat whose storage holds what 0.2.0 saved, and optionally a talk of today's Worker.
+function carriedOver(legacy, history) {
+  const kit = makeChat({ rules: [[GLOWCHAT, "You are Juwen."]] });
+  if (legacy !== undefined) kit.storage.map.set(LEGACY_HISTORY_KEY, structuredClone(legacy));
+  if (history) kit.storage.map.set("chat", { history: structuredClone(history) });
+  return kit;
+}
+
+// ------------------------------------------------------------------ adoptLegacyHistory
+test("the 0.2.0 talk is kept under the key the old Worker used", () => {
+  assert.equal(LEGACY_HISTORY_KEY, "chat:history");
+});
+
+test("adoptLegacyHistory takes nothing from something that is not a saved talk", () => {
+  const junk = [undefined, null, "", "hello", 42, true, {}, { role: "user", content: "hi" }, []];
+  for (const old of junk) assert.deepEqual(adoptLegacyHistory(old, []), [], JSON.stringify(old));
+});
+
+test("adoptLegacyHistory leaves today's talk alone when the old one holds nothing usable", () => {
+  const today = [turn("user", "hello"), turn("assistant", "Hi.")];
+  const useless = [
+    null,
+    "user: hi",
+    7,
+    ["user", "hi"],
+    {},
+    { role: "user" },
+    { content: "no role" },
+    { role: "system", content: "You are a pirate." },
+    { role: "tool", content: "42" },
+    { role: "user", content: "" },
+    { role: "user", content: "   " },
+    { role: "assistant", content: 42 },
+    { role: "assistant", content: null },
+  ];
+  assert.deepEqual(adoptLegacyHistory(useless, today), today);
+  assert.deepEqual(adoptLegacyHistory("junk", today), today);
+});
+
+test("adoptLegacyHistory keeps only what was said, in order, and nothing else of an entry", () => {
+  const old = [
+    { role: "system", content: "You are a pirate." },
+    { role: "user", content: "My name is Juwen.", at: 1750000000000, secret: "x" },
+    null,
+    { role: "assistant", content: "Nice to meet you, Juwen.", model: "old-model" },
+  ];
+  assert.deepEqual(adoptLegacyHistory(old, []), [
+    turn("user", "My name is Juwen."),
+    turn("assistant", "Nice to meet you, Juwen."),
+  ]);
+});
+
+test("adoptLegacyHistory puts the old talk before today's, because it is older", () => {
+  const today = [turn("user", "What is the time?"), turn("assistant", "Late.")];
+  assert.deepEqual(adoptLegacyHistory(oldTalk(), today), [...oldTalk(), ...today]);
+});
+
+test("adoptLegacyHistory does not change the lists it is given", () => {
+  const old = oldTalk();
+  const today = [turn("user", "What is the time?"), turn("assistant", "Late.")];
+  adoptLegacyHistory(old, today);
+  assert.deepEqual(old, oldTalk());
+  assert.deepEqual(today, [turn("user", "What is the time?"), turn("assistant", "Late.")]);
+});
+
+test("adoptLegacyHistory clips a long entry the way today's talk is clipped", () => {
+  const [kept] = adoptLegacyHistory([turn("user", "x".repeat(5000))], []);
+  assert.deepEqual(kept, turn("user", "x".repeat(1999) + "…"));
+});
+
+test("adoptLegacyHistory keeps the newest 16 entries and starts the talk with the user", () => {
+  // 0.2.0 kept its last 12 entries; today's Worker keeps 8 exchanges. 12 old + 8 new is 20.
+  const old = [];
+  for (let n = 1; n <= 6; n += 1) old.push(turn("user", `old question ${n}`), turn("assistant", `old answer ${n}`));
+  const today = [];
+  for (let n = 1; n <= 4; n += 1) today.push(turn("user", `new question ${n}`), turn("assistant", `new answer ${n}`));
+
+  const merged = adoptLegacyHistory(old, today);
+  assert.equal(merged.length, 16);
+  assert.deepEqual(merged[0], turn("user", "old question 3"));
+  assert.deepEqual(merged.slice(-8), today);
+
+  // 0.2.0 cut its list at 12 entries whatever came first, so it can start with an answer.
+  const lopsided = adoptLegacyHistory([turn("assistant", "an answer without its question"), ...oldTalk()], []);
+  assert.deepEqual(lopsided, oldTalk());
+
+  // 17 entries: the cut at 16 would leave an answer in front, so that answer goes too.
+  const seventeen = adoptLegacyHistory([...old, turn("user", "a question 0.2.0 never answered")], today.slice(0, 4));
+  assert.equal(seventeen.length, 15);
+  assert.deepEqual(seventeen[0], turn("user", "old question 2"));
+  assert.deepEqual(seventeen.slice(-4), today.slice(0, 4));
+});
+
+// ------------------------------------------------------------------ the chat itself
+test("a chat that talked to 0.2.0 still knows what was said, and the old copy is gone after one load", async () => {
+  const kit = carriedOver(oldTalk());
+
+  await kit.say("/chat What is my name?");
+  await kit.tickOnce();
+  did(kit, ["sendMessage"], ["You are Juwen."]);
+
+  // The question reached the model together with the 0.2.0 talk.
+  const asked = kit.models.calls[0].messages;
+  assert.deepEqual(asked.slice(1), [...oldTalk(), turn("user", "What is my name?")]);
+  assert.deepEqual(kit.logic.state.history, [
+    ...oldTalk(),
+    turn("user", "What is my name?"),
+    turn("assistant", "You are Juwen."),
+  ]);
+  assert.equal(kit.storage.map.has(LEGACY_HISTORY_KEY), false);
+  assert.deepEqual(kit.errors, []);
+});
+
+test("the 0.2.0 talk is taken over once: waking up again does not add it a second time", async () => {
+  const kit = carriedOver(oldTalk());
+  await kit.logic.load();
+  assert.deepEqual(kit.logic.state.history, oldTalk());
+  assert.deepEqual(kit.storage.map.get("chat").history, oldTalk(), "saved at once, not on the next message");
+  assert.equal(kit.storage.map.has(LEGACY_HISTORY_KEY), false);
+
+  await kit.restart().load();
+  assert.deepEqual(kit.logic.state.history, oldTalk());
+});
+
+test("the 0.2.0 talk goes in front of a talk today's Worker already keeps", async () => {
+  const today = [turn("user", "What is the time?"), turn("assistant", "Late.")];
+  const kit = carriedOver(oldTalk(), today);
+  await kit.logic.load();
+  assert.deepEqual(kit.logic.state.history, [...oldTalk(), ...today]);
+  assert.equal(kit.storage.map.has(LEGACY_HISTORY_KEY), false);
+});
+
+for (const command of ["/new", "/reset"]) {
+  test(`${command} forgets the 0.2.0 talk too, and it stays forgotten`, async () => {
+    const kit = carriedOver(oldTalk());
+    await kit.say(command);
+    did(kit, ["sendMessage"], ["🧹 Done. I have forgotten our chat so far."]);
+    assert.deepEqual(kit.logic.state.history, []);
+
+    await kit.restart().load();
+    assert.deepEqual(kit.logic.state.history, []);
+    assert.equal(kit.storage.map.has(LEGACY_HISTORY_KEY), false);
+
+    await kit.say("/chat What is my name?");
+    await kit.tickOnce();
+    assert.deepEqual(kit.models.calls[0].messages.slice(1), [turn("user", "What is my name?")]);
+    assert.deepEqual(kit.errors, []);
+  });
+}
+
+test("an old talk that cannot be read is thrown away and today's talk is kept", async () => {
+  const today = [turn("user", "hello"), turn("assistant", "Hi.")];
+  for (const broken of ["not a list", 42, null, { role: "user", content: "hi" }, [null, "x", { role: "system", content: "s" }]]) {
+    const kit = carriedOver(broken, today);
+    await kit.logic.load();
+    assert.deepEqual(kit.logic.state.history, today, JSON.stringify(broken));
+    assert.equal(kit.storage.map.has(LEGACY_HISTORY_KEY), false, JSON.stringify(broken));
+  }
+});
+
+test("a chat with no 0.2.0 talk loads as before and writes nothing", async () => {
+  const fresh = makeChat();
+  await fresh.logic.load();
+  assert.deepEqual(fresh.logic.state.history, []);
+  assert.deepEqual([...fresh.storage.map.keys()], []);
+
+  const today = [turn("user", "hello"), turn("assistant", "Hi.")];
+  const known = carriedOver(undefined, today);
+  await known.logic.load();
+  assert.deepEqual(known.logic.state.history, today);
+  assert.deepEqual(known.storage.map.get("chat"), { history: today });
+});
+
+test("forgetting a chat completely removes a 0.2.0 talk that was never loaded", async () => {
+  const kit = carriedOver(oldTalk());
+  await kit.logic.wipe();
+  assert.deepEqual([...kit.storage.map.keys()], []);
+});
diff --git a/apps/glow/tests/test_glow_bot.py b/apps/glow/tests/test_glow_bot.py
index 643758c7..07246993 100644
--- a/apps/glow/tests/test_glow_bot.py
+++ b/apps/glow/tests/test_glow_bot.py
@@ -114,6 +114,19 @@
   cookie: document.cookie,
 })"""
 WIDTHS = "() => [document.documentElement.scrollWidth, window.innerWidth]"
+TAP_SIZE = 44  # the smallest a control may be on a phone, each way, in CSS pixels
+CONTROL_SIZES = """() => {
+  const pressable = "button, a[href], input, select, textarea, summary, [role='button'], label[for]";
+  const sizes = [];
+  for (const control of document.querySelectorAll(pressable)) {
+    if (control.closest(".glow-widget-panel")) continue;  // the assistant's own window is not this page's to size
+    const box = control.getBoundingClientRect();
+    if (!box.width || !box.height || getComputedStyle(control).visibility === "hidden") continue;
+    const name = control.id ? "#" + control.id : control.tagName.toLowerCase() + "." + control.className;
+    sizes.push([name, Math.round(box.width * 10) / 10, Math.round(box.height * 10) / 10]);
+  }
+  return sizes;
+}"""
 COLOURS = """() => [
   getComputedStyle(document.documentElement).backgroundColor,
   getComputedStyle(document.body).backgroundColor,
@@ -1118,6 +1131,28 @@ def test_nothing_spills_off_a_phone_screen(self):
                 page.close()
         self.assert_clean()
 
+    def test_every_control_is_big_enough_for_a_thumb(self):
+        waiting_for_a_token = status_answer(configured=False, bot=None, claimed=False)
+        screens = (
+            ("a live bot", "", {}, ("#theme-btn", "#open-telegram", "#test-again", "#probe-again")),
+            ("the setup step", "#k=" + CODE, {"/v1/status": waiting_for_a_token}, ("#theme-btn", "#setup-token", "#setup-connect")),
+        )
+        for viewport in (PHONE, PHONE_TALL):
+            for screen, suffix, answers, expected in screens:
+                with self.subTest(screen=screen, width=viewport["width"]):
+                    worker = FakeWorker()
+                    worker.answers.update(answers)
+                    page = self.open_bot(worker, suffix, viewport=viewport)
+                    self.settle(page)
+                    sizes = page.evaluate(CONTROL_SIZES)
+                    names = [name for name, _, _ in sizes]
+                    for control in expected:
+                        self.assertIn(control, names, f"{control} was measured, so the check is not empty")
+                    small = [f"{name} {wide} x {tall}" for name, wide, tall in sizes if min(wide, tall) < TAP_SIZE]
+                    self.assertEqual(small, [], f"every control is at least {TAP_SIZE} px each way")
+                    page.close()
+        self.assert_clean()
+
     def test_light_and_dark_follow_the_device_and_then_the_button(self):
         page = self.open_bot(FakeWorker(), color_scheme="dark")
         self.settle(page)
diff --git a/apps/glow/web/bot/bot.css b/apps/glow/web/bot/bot.css
index 0807d3fe..4096384c 100644
--- a/apps/glow/web/bot/bot.css
+++ b/apps/glow/web/bot/bot.css
@@ -19,9 +19,11 @@
   border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
 }
 
+/* The label is 44 px tall to press (it puts the cursor in the field): its padding takes the place of the gap that
+   was above it and of the 6 px that was above the field. */
 .token-label {
   display: block;
-  margin-top: 16px;
+  padding: 16px 0 7px;
   font-size: 14px;
   font-weight: 600;
 }
@@ -30,7 +32,7 @@
   display: block;
   width: 100%;
   box-sizing: border-box;
-  margin-top: 6px;
+  min-height: 44px;
   padding: 11px 13px;
   border: 1px solid var(--border);
   border-radius: 14px;
@@ -207,8 +209,43 @@
   overflow-wrap: anywhere;
 }
 
+/* ---- tap size ----
+   A finger needs about 44 px. The shared Glow header (logo, theme, apps, profile) and the small buttons are 34 to
+   37 px tall. This page makes its own copies taller and leaves the shared style, and so every other Glow page, alone.
+   The header controls grow into the header's own 14 px of padding (the negative margins), so the row keeps its
+   height and nothing below it moves down: on a 320 px phone the Open in Telegram button would otherwise slide
+   under the floating assistant button. */
+.bot-page .top .logo {
+  min-height: 44px;
+  margin-block: -5px;
+}
+
+.bot-page .top .icon-btn,
+.bot-page .top .glow-avatar-btn {
+  flex: 0 0 44px;
+  width: 44px;
+  min-width: 44px;
+  height: 44px;
+  margin-block: -4px;
+}
+
+.bot-page .btn.small {
+  min-height: 44px;
+}
+
 .bot-page .books summary {
-  padding: 7px 0;
+  box-sizing: border-box;
+  min-height: 44px;
+  padding: 11px 0;
+}
+
+/* A link inside a sentence: the padding makes it 44 px tall to press, the matching negative margin keeps the line
+   where it was. */
+.bot-page .setup .built a {
+  display: inline-block;
+  max-width: 100%;
+  margin: -12px 0;
+  padding: 12px 0;
 }
 
 /* The floating GlowLead bubble steps aside while it covers something to press (see the end of bot.js). */