Release Hudra 0.10 beta 1

.gitignore

@@ -18,3 +18,5 @@ build/
 *.tmp
 *.temp
 *.log
+
+release/

AGENTS.md

@@ -0,0 +1,242 @@
+Hudra
+Purpose
+
+Hudra is a browser extension that turns structured QLearn lesson pages into a clean, classroom-friendly presentation.
+
+Hudra presents existing QLearn content in a slide-oriented or presentation-oriented format.
+
+It is not a QLearn page editor.
+
+Core product promise
+
+Hudra should allow a teacher to open an existing QLearn lesson and present it clearly without rebuilding the content in separate presentation software.
+
+The original QLearn page remains the source of truth.
+
+Responsibilities
+
+Hudra may:
+
+detect supported QLearn lesson pages;
+identify presentation sections from page structure;
+interpret supported headings as presentation boundaries;
+present page content in a slide-like view;
+provide previous and next navigation;
+support keyboard navigation;
+provide fullscreen or classroom presentation modes;
+display progress through the presentation;
+preserve embedded content where practical;
+provide graceful fallback behaviour for unsupported elements;
+restore the normal QLearn page when presentation mode closes;
+remember appropriate user preferences.
+Product boundaries
+
+Hudra must not:
+
+edit or permanently rewrite QLearn page content;
+save changes into the QLearn editor;
+become a general page-formatting tool;
+add teacher notes to the source page;
+become a general distraction-removal extension;
+duplicate Pendra’s editing features;
+duplicate Lildra’s general focus-mode features;
+require users to rebuild lessons specifically for Hudra unless a documented structure is necessary.
+Relationship to other Napper applications
+Lildra
+
+Lildra reduces surrounding QLearn clutter while leaving the content in its original continuous-page form.
+
+Hudra provides a presentation experience.
+
+A feature belongs in Hudra when it is specifically useful while presenting lesson content.
+
+Pendra
+
+Pendra helps teachers edit, structure and enhance QLearn pages.
+
+Hudra may interpret structure created by Pendra, but it must not perform Pendra’s editing work.
+
+Content interpretation
+
+Hudra should rely on semantic page structure wherever possible.
+
+Preferred signals include:
+
+valid heading hierarchy;
+clearly defined content sections;
+predictable QLearn content containers;
+explicit Hudra-compatible markers only where normal semantic structure is insufficient.
+
+Do not rely unnecessarily on fragile visual selectors or exact class names.
+
+QLearn may change its DOM structure. Detection should therefore be defensive and easy to update.
+
+Behaviour principles
+Never permanently alter lesson content.
+Presentation mode must be reversible.
+Closing Hudra should restore the original page state.
+Missing elements must not cause the entire extension to fail.
+Unsupported content should remain visible where possible.
+Avoid hiding important content silently.
+Provide clear feedback when a page cannot be presented reliably.
+Do not activate on unrelated pages.
+Avoid interfering with normal QLearn controls when Hudra is inactive.
+User experience
+
+Hudra should feel calm, predictable and suitable for classroom use.
+
+Prioritise:
+
+large readable content;
+clear navigation;
+minimal controls;
+obvious presentation state;
+reliable keyboard interaction;
+smooth restoration of the normal page;
+minimal setup.
+
+Avoid:
+
+crowded toolbars;
+unnecessary configuration;
+distracting animation;
+ambiguous icons;
+features unrelated to presenting content.
+Accessibility
+Preserve meaningful heading and document structure where practical.
+Maintain keyboard navigation.
+Ensure controls have accessible names.
+Use sufficient colour contrast.
+Avoid relying on colour alone to convey state.
+Preserve alternative text for images.
+Do not remove captions or transcripts from embedded content.
+Avoid trapping keyboard focus.
+Technical principles
+Prefer plain JavaScript, HTML and CSS.
+Avoid unnecessary frameworks and dependencies.
+Keep the extension independently installable.
+Request only the permissions Hudra genuinely needs.
+Do not include remote executable code.
+Do not include API keys, passwords or private credentials.
+Validate DOM elements before accessing them.
+Isolate QLearn selectors and detection logic where practical.
+Avoid duplicated selectors across multiple files.
+Use clear, descriptive names.
+Keep functions focused.
+Add comments only when behaviour is not obvious.
+Remove temporary debugging output before release.
+QLearn safety
+
+Hudra operates inside an external platform that may change without notice.
+
+Code must:
+
+check that expected elements exist;
+handle missing or changed selectors;
+avoid assumptions about a single page layout;
+fail without breaking the underlying QLearn page;
+avoid deleting source elements;
+avoid destructive DOM operations;
+retain enough state to restore the original page;
+document selectors that are especially fragile.
+Permissions and privacy
+
+Hudra should request the smallest possible set of browser permissions.
+
+Any stored data should normally be limited to local preferences, such as:
+
+display options;
+presentation preferences;
+last-used settings.
+
+Do not collect or transmit:
+
+student information;
+lesson content;
+QLearn credentials;
+browsing history;
+analytics;
+personal data;
+
+unless the repository documentation and privacy policy are deliberately updated to reflect verified behaviour.
+
+Repository expectations
+
+The repository should contain:
+
+README.md
+AGENTS.md
+CHANGELOG.md
+manifest.json
+source files
+icons
+release tooling
+relevant documentation
+tests where practical
+
+Generated release packages should not be committed unless there is a deliberate reason.
+
+Release output should remain ignored through .gitignore.
+
+Versioning
+
+Hudra uses its own version number.
+
+Use semantic versioning where practical:
+
+patch: fixes without new user-facing capability;
+minor: backwards-compatible features;
+major: substantial or potentially disruptive changes.
+
+The version in manifest.json must match the intended release.
+
+Use release tags such as:
+
+v0.9.3
+v1.0.0
+v1.1.0
+
+Release packages should use names such as:
+
+Hudra-v1.0.0.zip
+Release requirements
+
+Before preparing a release:
+
+Confirm the manifest version.
+Review requested permissions.
+Run available checks and tests.
+Test Hudra manually on representative QLearn pages.
+Test activation and deactivation.
+Test keyboard navigation.
+Test fullscreen behaviour if supported.
+Confirm the normal QLearn page is restored correctly.
+Check the extension package contains only required runtime files.
+Exclude development files, previous releases and generated folders.
+Update CHANGELOG.md.
+Update documentation when behaviour changes.
+Identify remaining manual testing requirements.
+Codex working rules
+
+When asked to implement a feature:
+
+Inspect the relevant implementation before editing.
+Confirm that the feature belongs within Hudra’s scope.
+Prefer the smallest reliable change.
+Do not broaden permissions without explaining why.
+Do not silently change public behaviour.
+Preserve compatibility with existing structured pages where possible.
+Update documentation and changelog entries when appropriate.
+Run available validation.
+Summarise changes clearly.
+State what still requires testing inside QLearn.
+
+When asked to review the repository:
+
+distinguish confirmed defects from possible risks;
+do not rewrite functioning code solely for stylistic preference;
+identify fragile QLearn selectors;
+identify destructive or irreversible DOM changes;
+identify unnecessary permissions;
+identify files accidentally included in release packages;
+identify differences between documented and actual behaviour.

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 Turn HTML lessons into classroom presentations.
 
+## Hudra 0.10 Beta 1 — 2026-07-26
+
+- Restrict presentation startup to supported QLearn and Instructure lesson pages.
+- Show an accessible in-page message when Hudra cannot start.
+- Restore active presenter sessions after the extension service worker restarts.
+- Remove the unnecessary `tabs` permission.
+- Preserve rich paragraph markup during slide pagination.
+- Package only browser-extension runtime files in release builds.
+
 Build once.
 Present everywhere.
 
@@ -47,9 +56,9 @@ It simply gives it Presentation Mode.
 
 ## Roadmap
 
-Current release
+Current beta release
 
-Hudra 0.9.1
+Hudra 0.10 Beta 1
 
 See ROADMAP.md
 

README.md

@@ -3,6 +3,9 @@ Hudra
 
 Hudra transforms structured Canvas/QLearn pages into responsive presentations. All lesson processing remains local in the browser.
 
+CURRENT BETA
+Hudra 0.10 Beta 1
+
 INSTALL
 1. Extract this ZIP file.
 2. Open edge://extensions, chrome://extensions or brave://extensions.

ROADMAP.md

@@ -3,6 +3,16 @@
 Hudra is developed incrementally, with stability and simplicity prioritised
 over large feature releases.
 
+## Current beta release
+
+### Hudra 0.10 Beta 1
+
+- Supported-page detection for QLearn and Canvas
+- Resilient presenter controls across service-worker restarts
+- Rich paragraph markup preserved during pagination
+- Reduced browser permissions
+- Runtime-only release packaging
+
 ## Current stable release
 
 ### Hudra 0.9.1

background.js

@@ -2,6 +2,80 @@ const sessions = new Map();
 const tabToSession = new Map();
 const windowToSession = new Map();
 const previousWindowStates = new Map();
+const sessionStorageKey = "hudraActiveSessions";
+let persistStatePromise = Promise.resolve();
+
+function rebuildSessionIndexes() {
+  tabToSession.clear();
+  windowToSession.clear();
+
+  sessions.forEach((session) => {
+    if (session.audienceTabId != null) {
+      tabToSession.set(session.audienceTabId, session.id);
+    }
+    if (session.audienceWindowId != null) {
+      windowToSession.set(session.audienceWindowId, session.id);
+    }
+    if (session.controlWindowId != null) {
+      windowToSession.set(session.controlWindowId, session.id);
+    }
+  });
+}
+
+async function restoreSessionState() {
+  const stored = await chrome.storage.session.get(sessionStorageKey);
+  const state = stored[sessionStorageKey];
+  if (!state) return;
+
+  for (const storedSession of state.sessions || []) {
+    if (!storedSession?.id) continue;
+    sessions.set(storedSession.id, {
+      ...storedSession,
+      pageTitle: "Hudra",
+      current: 0,
+      count: 0,
+      audienceHidden: false,
+      audienceZoom: 100,
+      audienceScrollY: 0,
+      currentPreview: "",
+      nextPreview: ""
+    });
+  }
+
+  for (const [windowId, windowState] of state.previousWindowStates || []) {
+    previousWindowStates.set(Number(windowId), windowState);
+  }
+
+  rebuildSessionIndexes();
+}
+
+const sessionStateReady = restoreSessionState().catch((error) => {
+  console.warn("Hudra could not restore its active sessions:", error);
+});
+
+async function ensureSessionStateReady() {
+  await sessionStateReady;
+}
+
+function persistSessionState() {
+  const state = {
+    sessions: [...sessions.values()].map((session) => ({
+      id: session.id,
+      mode: session.mode,
+      sourceTabId: session.sourceTabId,
+      audienceTabId: session.audienceTabId,
+      audienceWindowId: session.audienceWindowId,
+      controlWindowId: session.controlWindowId
+    })),
+    previousWindowStates: [...previousWindowStates.entries()]
+  };
+
+  persistStatePromise = persistStatePromise
+    .catch(() => {})
+    .then(() => chrome.storage.session.set({ [sessionStorageKey]: state }));
+
+  return persistStatePromise;
+}
 
 function makeSessionId() {
   return `${Date.now()}-${Math.random().toString(36).slice(2)}`;
@@ -32,6 +106,57 @@ function chooseSecondaryDisplay(displays) {
   return { primary, secondary };
 }
 
+function isSupportedLessonUrl(value) {
+  try {
+    const url = new URL(value);
+    const hostname = url.hostname.toLowerCase();
+    return url.protocol === "https:" && (
+      hostname === "qlearn.eq.edu.au" ||
+      hostname.endsWith(".qlearn.eq.edu.au") ||
+      hostname.endsWith(".instructure.com")
+    );
+  } catch (error) {
+    return false;
+  }
+}
+
+async function showPageNotice(tabId, message) {
+  await chrome.scripting.executeScript({
+    target: { tabId },
+    files: ["page-detection.js"]
+  });
+
+  await chrome.scripting.executeScript({
+    target: { tabId },
+    func: (noticeMessage) => window.__hudraPageDetector.showNotice(noticeMessage),
+    args: [message]
+  });
+}
+
+async function inspectLessonPage(tabId) {
+  await chrome.scripting.executeScript({
+    target: { tabId },
+    files: ["page-detection.js"]
+  });
+
+  const results = await chrome.scripting.executeScript({
+    target: { tabId },
+    func: () => window.__hudraPageDetector.inspect()
+  });
+
+  return results[0]?.result || { supported: false, reason: "INSPECTION_FAILED" };
+}
+
+function messageForUnsupportedPage(reason) {
+  if (reason === "NO_LESSON_TITLE") {
+    return "Hudra couldn’t start because this lesson has no H1 title.";
+  }
+  if (reason === "EMPTY_LESSON") {
+    return "Hudra couldn’t start because this lesson has no presentable content.";
+  }
+  return "Hudra couldn’t start because this page does not contain a supported lesson.";
+}
+
 async function waitForTabComplete(tabId, timeoutMs = 20000) {
   const existing = await chrome.tabs.get(tabId).catch(() => null);
   if (existing?.status === "complete") return;
@@ -57,7 +182,7 @@ async function waitForTabComplete(tabId, timeoutMs = 20000) {
 async function injectPresenter(tabId, config) {
   await chrome.scripting.executeScript({
     target: { tabId },
-    files: ["presenter.js"]
+    files: ["page-detection.js", "presenter.js"]
   });
 
   await chrome.tabs.sendMessage(tabId, {
@@ -67,6 +192,7 @@ async function injectPresenter(tabId, config) {
 }
 
 async function startSingleScreen(tab) {
+  await ensureSessionStateReady();
   if (!tab.id || tab.windowId == null) return;
 
   const sessionId = makeSessionId();
@@ -93,12 +219,14 @@ async function startSingleScreen(tab) {
   sessions.set(sessionId, session);
   tabToSession.set(tab.id, sessionId);
   windowToSession.set(tab.windowId, sessionId);
+  await persistSessionState();
 
   await injectPresenter(tab.id, { mode: "single", sessionId });
   await chrome.windows.update(tab.windowId, { state: "fullscreen" });
 }
 
 async function startDualScreen(tab, primary, secondary) {
+  await ensureSessionStateReady();
   if (!tab.id || !tab.url) return;
 
   const sessionId = makeSessionId();
@@ -153,6 +281,7 @@ async function startDualScreen(tab, primary, secondary) {
   tabToSession.set(audienceTab.id, sessionId);
   windowToSession.set(audienceWindow.id, sessionId);
   if (controlWindow.id != null) windowToSession.set(controlWindow.id, sessionId);
+  await persistSessionState();
 
   await waitForTabComplete(audienceTab.id);
   await injectPresenter(audienceTab.id, { mode: "audience", sessionId });
@@ -180,6 +309,7 @@ async function startDualScreen(tab, primary, secondary) {
 }
 
 async function endSession(sessionId, reason = "ended") {
+  await ensureSessionStateReady();
   const session = sessions.get(sessionId);
   if (!session) return;
 
@@ -197,10 +327,12 @@ async function endSession(sessionId, reason = "ended") {
 
     const previousState = previousWindowStates.get(session.audienceWindowId) || "maximized";
     previousWindowStates.delete(session.audienceWindowId);
+    await persistSessionState();
     await chrome.windows.update(session.audienceWindowId, { state: previousState }).catch(async () => {
       await chrome.windows.update(session.audienceWindowId, { state: "maximized" }).catch(() => {});
     });
   } else {
+    await persistSessionState();
     if (session.audienceWindowId != null) {
       await chrome.windows.remove(session.audienceWindowId).catch(() => {});
     }
@@ -211,6 +343,7 @@ async function endSession(sessionId, reason = "ended") {
 }
 
 async function sendCommand(sessionId, command, value) {
+  await ensureSessionStateReady();
   const session = sessions.get(sessionId);
   if (!session?.audienceTabId) return;
 
@@ -227,6 +360,7 @@ async function sendCommand(sessionId, command, value) {
 }
 
 async function toggleHudraForTab(tab) {
+  await ensureSessionStateReady();
   if (!tab?.id) return;
 
   const windowSessionId = tab.windowId != null ? windowToSession.get(tab.windowId) : null;
@@ -241,6 +375,30 @@ async function toggleHudraForTab(tab) {
     return;
   }
 
+  if (!isSupportedLessonUrl(tab.url)) {
+    await showPageNotice(
+      tab.id,
+      "Hudra works on QLearn and Canvas lesson pages hosted by Instructure."
+    ).catch(() => {});
+    return;
+  }
+
+  let inspection;
+  try {
+    inspection = await inspectLessonPage(tab.id);
+  } catch (error) {
+    await showPageNotice(
+      tab.id,
+      "Hudra couldn’t inspect this page. Wait for it to finish loading and try again."
+    ).catch(() => {});
+    return;
+  }
+
+  if (!inspection.supported) {
+    await showPageNotice(tab.id, messageForUnsupportedPage(inspection.reason)).catch(() => {});
+    return;
+  }
+
   try {
     const displays = await getUsableDisplays();
     const { primary, secondary } = chooseSecondaryDisplay(displays);
@@ -270,31 +428,33 @@ chrome.commands.onCommand.addListener(async (command) => {
 
 chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
   if (message?.type === "QLEARN_PRESENTER_STATE") {
-    const session = sessions.get(message.sessionId);
-    if (!session) return;
+    ensureSessionStateReady().then(() => {
+      const session = sessions.get(message.sessionId);
+      if (!session) return;
 
-    session.current = Number(message.current) || 0;
-    session.count = Number(message.count) || 0;
-    session.pageTitle = message.pageTitle || session.pageTitle;
-    session.audienceHidden = Boolean(message.audienceHidden);
-    session.audienceZoom = Number(message.audienceZoom) || 100;
-    session.audienceScrollY = Number(message.audienceScrollY) || 0;
-    session.currentPreview = message.currentPreview || "";
-    session.nextPreview = message.nextPreview || "";
+      session.current = Number(message.current) || 0;
+      session.count = Number(message.count) || 0;
+      session.pageTitle = message.pageTitle || session.pageTitle;
+      session.audienceHidden = Boolean(message.audienceHidden);
+      session.audienceZoom = Number(message.audienceZoom) || 100;
+      session.audienceScrollY = Number(message.audienceScrollY) || 0;
+      session.currentPreview = message.currentPreview || "";
+      session.nextPreview = message.nextPreview || "";
 
-    chrome.runtime.sendMessage({
-      type: "QLEARN_PRESENTER_STATE_UPDATE",
-      sessionId: session.id,
-      current: session.current,
-      count: session.count,
-      pageTitle: session.pageTitle,
-      mode: session.mode,
-      audienceHidden: session.audienceHidden,
-      audienceZoom: session.audienceZoom,
-      audienceScrollY: session.audienceScrollY,
-      currentPreview: session.currentPreview,
-      nextPreview: session.nextPreview
-    }).catch(() => {});
+      chrome.runtime.sendMessage({
+        type: "QLEARN_PRESENTER_STATE_UPDATE",
+        sessionId: session.id,
+        current: session.current,
+        count: session.count,
+        pageTitle: session.pageTitle,
+        mode: session.mode,
+        audienceHidden: session.audienceHidden,
+        audienceZoom: session.audienceZoom,
+        audienceScrollY: session.audienceScrollY,
+        currentPreview: session.currentPreview,
+        nextPreview: session.nextPreview
+      }).catch(() => {});
+    });
     return;
   }
 
@@ -309,31 +469,41 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
   }
 
   if (message?.type === "QLEARN_PRESENTER_GET_SESSION") {
-    const session = sessions.get(message.sessionId);
-    sendResponse(session ? {
-      sessionId: session.id,
-      mode: session.mode,
-      current: session.current,
-      count: session.count,
-      pageTitle: session.pageTitle,
-      audienceHidden: session.audienceHidden,
-      audienceZoom: session.audienceZoom,
-      audienceScrollY: session.audienceScrollY,
-      currentPreview: session.currentPreview,
-      nextPreview: session.nextPreview
-    } : null);
+    ensureSessionStateReady().then(() => {
+      const session = sessions.get(message.sessionId);
+      if (session?.audienceTabId != null) {
+        chrome.tabs.sendMessage(session.audienceTabId, {
+          type: "QLEARN_PRESENTER_COMMAND",
+          command: "reportState"
+        }).catch(() => {});
+      }
+      sendResponse(session ? {
+        sessionId: session.id,
+        mode: session.mode,
+        current: session.current,
+        count: session.count,
+        pageTitle: session.pageTitle,
+        audienceHidden: session.audienceHidden,
+        audienceZoom: session.audienceZoom,
+        audienceScrollY: session.audienceScrollY,
+        currentPreview: session.currentPreview,
+        nextPreview: session.nextPreview
+      } : null);
+    });
     return true;
   }
 });
 
 chrome.windows.onRemoved.addListener((windowId) => {
-  const sessionId = windowToSession.get(windowId);
-  if (!sessionId) return;
-  const session = sessions.get(sessionId);
-  if (!session) return;
+  ensureSessionStateReady().then(() => {
+    const sessionId = windowToSession.get(windowId);
+    if (!sessionId) return;
+    const session = sessions.get(sessionId);
+    if (!session) return;
 
-  // Closing either dual-screen window ends the whole presentation.
-  if (session.mode === "dual") {
-    endSession(sessionId, "window-closed").catch(() => {});
-  }
+    // Closing either dual-screen window ends the whole presentation.
+    if (session.mode === "dual") {
+      endSession(sessionId, "window-closed").catch(() => {});
+    }
+  });
 });

docs/ARCHITECTURE.md

@@ -13,13 +13,28 @@ The current presentation model uses HTML headings:
 
 - H1 identifies the lesson title
 - H2 identifies the beginning of a new slide
-- content following an H2 belongs to that slide until the next H2
+- H3 identifies the beginning of a new slide
+- H4 identifies a subsection within the current slide
+- content following an H2 or H3 belongs to that slide until the next H2 or H3
+
+Pages without H2 or H3 headings are presented as a single slide.
+
+## Supported pages
+
+Hudra starts only on secure QLearn pages at `qlearn.eq.edu.au` (including
+subdomains) and Canvas pages on an `instructure.com` subdomain. A supported
+page must also contain a recognised lesson-content container and an H1 lesson
+title. Unsupported pages receive a temporary in-page notice and are not put
+into presentation mode.
 
 ## Main components
 
 ### background.js
 
 Handles extension-level behaviour and presentation launch logic.
+Active session routing and window-restoration metadata is kept in
+`chrome.storage.session` so presenter controls survive service-worker restarts.
+Lesson content and slide previews are not persisted.
 
 ### controls.html
 
@@ -37,6 +52,11 @@ Manages presenter navigation, controls and audience communication.
 
 Creates and manages the audience presentation experience.
 
+### page-detection.js
+
+Contains the shared lesson-container and title detection used before launch
+and when presentation mode starts.
+
 ### manifest.json
 
 Defines the extension metadata, permissions and version.

manifest.json

@@ -1,12 +1,13 @@
 {
   "manifest_version": 3,
   "name": "Hudra",
-  "version": "0.9.2",
+  "version": "0.10.0",
+  "version_name": "0.10 Beta 1",
   "description": "Hudra turns Canvas/QLearn pages into responsive presentations with automatic pagination, dual-screen presenter view, audience controls, clicker support and local-only processing.",
   "permissions": [
     "activeTab",
     "scripting",
-    "tabs",
+    "storage",
     "system.display"
   ],
   "host_permissions": [

page-detection.js

@@ -0,0 +1,122 @@
+(() => {
+  if (window.__hudraPageDetector) return;
+
+  const contentRootSelectors = [
+    "#content .user_content",
+    ".show-content .user_content",
+    ".wiki-page-content .user_content",
+    ".user_content",
+    "[role='main'] .page-content",
+    "[role='main'] .content"
+  ];
+
+  const titleSelectors = [
+    "h1.page-title",
+    "h1.wiki-page-title",
+    "#content h1"
+  ];
+
+  function hasMeaningfulContent(element) {
+    return Boolean(
+      element?.textContent?.trim() ||
+      element?.querySelector("img, video, iframe, svg, canvas, picture, table")
+    );
+  }
+
+  function resolve() {
+    let contentRoot = null;
+    let contentRootSelector = null;
+
+    for (const selector of contentRootSelectors) {
+      const candidate = document.querySelector(selector);
+      if (candidate) {
+        contentRoot = candidate;
+        contentRootSelector = selector;
+        break;
+      }
+    }
+
+    if (!contentRoot) {
+      return { supported: false, reason: "NO_LESSON_CONTAINER" };
+    }
+
+    const pageTitleElement =
+      contentRoot.querySelector("h1") ||
+      document.querySelector(titleSelectors.join(", "));
+
+    if (!pageTitleElement) {
+      return { supported: false, reason: "NO_LESSON_TITLE" };
+    }
+
+    if (!hasMeaningfulContent(contentRoot)) {
+      return { supported: false, reason: "EMPTY_LESSON" };
+    }
+
+    return {
+      supported: true,
+      reason: null,
+      contentRoot,
+      contentRootSelector,
+      pageTitleElement
+    };
+  }
+
+  function inspect() {
+    const result = resolve();
+    return {
+      supported: result.supported,
+      reason: result.reason,
+      contentRootSelector: result.contentRootSelector || null
+    };
+  }
+
+  function showNotice(message) {
+    document.getElementById("hudra-page-notice")?.remove();
+
+    const notice = document.createElement("div");
+    notice.id = "hudra-page-notice";
+    notice.setAttribute("role", "status");
+    notice.setAttribute("aria-live", "polite");
+    notice.style.cssText = [
+      "position:fixed",
+      "z-index:2147483647",
+      "right:20px",
+      "bottom:20px",
+      "max-width:420px",
+      "box-sizing:border-box",
+      "padding:16px 48px 16px 18px",
+      "border:1px solid #bac4d2",
+      "border-radius:10px",
+      "background:#fff",
+      "color:#1f2937",
+      "box-shadow:0 8px 28px rgba(15,23,42,.2)",
+      "font:16px/1.4 system-ui,sans-serif"
+    ].join(";");
+
+    const text = document.createElement("span");
+    text.textContent = message;
+    notice.appendChild(text);
+
+    const close = document.createElement("button");
+    close.type = "button";
+    close.setAttribute("aria-label", "Dismiss Hudra message");
+    close.textContent = "×";
+    close.style.cssText = [
+      "position:absolute",
+      "top:8px",
+      "right:10px",
+      "border:0",
+      "background:transparent",
+      "color:#374151",
+      "font:24px/1 system-ui,sans-serif",
+      "cursor:pointer"
+    ].join(";");
+    close.addEventListener("click", () => notice.remove());
+    notice.appendChild(close);
+
+    document.body.appendChild(notice);
+    window.setTimeout(() => notice.remove(), 8000);
+  }
+
+  window.__hudraPageDetector = { inspect, resolve, showNotice };
+})();

presenter.js

@@ -10,36 +10,19 @@
     const presenterMode = config.mode || "single";
     const sessionId = config.sessionId || "standalone";
 
-  const contentRoot =
-    document.querySelector(
-      "#content .user_content, " +
-      ".show-content .user_content, " +
-      ".wiki-page-content .user_content, " +
-      ".user_content"
-    ) ||
-    document.querySelector(
-      "[role='main'] .page-content, " +
-      "[role='main'] .content"
-    ) ||
-    document.querySelector("#content") ||
-    document.body;
+  const detectedPage = window.__hudraPageDetector?.resolve();
 
-  const pageTitleElement =
-    contentRoot.querySelector("h1") ||
-    document.querySelector(
-      "#content h1, .page-title, .wiki-page-title, h1.page-title"
+  if (!detectedPage?.supported) {
+    window.__hudraPageDetector?.showNotice(
+      "Hudra couldn’t start because this page does not contain a supported lesson."
     );
+    return;
+  }
+
+  const { contentRoot, pageTitleElement } = detectedPage;
 
   let pageTitle = pageTitleElement?.textContent?.trim() || "";
 
-  if (!pageTitle) {
-    pageTitle = document.title.replace(/\s*:\s*[^:]+$/, "").trim();
-  }
-
-  if (!pageTitle) {
-    pageTitle = "Lesson";
-  }
-
   function isHidden(element) {
     if (!element || element.hidden) return true;
 
@@ -101,11 +84,6 @@
     }
   }
 
-  if (!slideDefinitions.length) {
-    alert("No presentable page content was found.");
-    return;
-  }
-
   const presentationLayer = document.createElement("div");
   presentationLayer.id = "qlearn-presenter-layer";
   document.body.appendChild(presentationLayer);
@@ -699,20 +677,6 @@
     return heading;
   }
 
-  function splitParagraph(paragraph) {
-    const text = paragraph.textContent.trim();
-    const sentences = text.match(/[^.!?]+[.!?]+|[^.!?]+$/g) || [text];
-    if (sentences.length < 2) return [paragraph.cloneNode(true)];
-    const midpoint = Math.ceil(sentences.length / 2);
-    return [sentences.slice(0, midpoint), sentences.slice(midpoint)]
-      .filter((part) => part.length)
-      .map((part) => {
-        const copy = paragraph.cloneNode(false);
-        copy.textContent = part.join(" ").trim();
-        return copy;
-      });
-  }
-
   function splitList(list) {
     const items = [...list.children].filter((item) => item.tagName === "LI");
     if (items.length < 2) return [list.cloneNode(true)];
@@ -726,9 +690,6 @@
 
   function divideOversizedBlock(block) {
     if (block.matches("ul, ol")) return splitList(block);
-    if (block.matches("p") && block.textContent.trim().length > 220) {
-      return splitParagraph(block);
-    }
     return [block.cloneNode(true)];
   }
 
@@ -1371,6 +1332,9 @@
     },
     getSlideCount() {
       return slideWrappers.length;
+    },
+    reportState() {
+      sendPresenterState();
     }
   };
 
@@ -1399,6 +1363,7 @@
       if (command === "scrollBy") window.__qlearnPresenter.scrollBy(message.value);
       if (command === "resetView") window.__qlearnPresenter.resetView();
       if (command === "goTo") window.__qlearnPresenter.goTo(message.value);
+      if (command === "reportState") window.__qlearnPresenter.reportState();
       if (command === "exit") window.__qlearnPresenter.exit(false);
     }
   });

release.ps1

@@ -0,0 +1,126 @@
+# Hudra release builder
+# Reads the version from manifest.json, creates a clean release folder,
+# and produces a Chrome Web Store-ready ZIP.
+
+$ErrorActionPreference = "Stop"
+
+# Project locations
+$ProjectRoot = $PSScriptRoot
+$ManifestPath = Join-Path $ProjectRoot "manifest.json"
+$ReleaseRoot = Join-Path $ProjectRoot "release"
+
+# Check that manifest.json exists
+if (-not (Test-Path $ManifestPath)) {
+    Write-Host "ERROR: manifest.json was not found." -ForegroundColor Red
+    Write-Host "Place release.ps1 in the same folder as manifest.json."
+    exit 1
+}
+
+# Read extension name and version
+try {
+    $Manifest = Get-Content $ManifestPath -Raw | ConvertFrom-Json
+}
+catch {
+    Write-Host "ERROR: manifest.json is not valid JSON." -ForegroundColor Red
+    exit 1
+}
+
+$ExtensionName = $Manifest.name
+$Version = $Manifest.version
+
+if ([string]::IsNullOrWhiteSpace($ExtensionName)) {
+    $ExtensionName = "Hudra"
+}
+
+if ([string]::IsNullOrWhiteSpace($Version)) {
+    Write-Host "ERROR: No version was found in manifest.json." -ForegroundColor Red
+    exit 1
+}
+
+$SafeName = $ExtensionName -replace '[^a-zA-Z0-9_-]', '-'
+$ReleaseName = "$SafeName-v$Version"
+
+$StagingFolder = Join-Path $ReleaseRoot $ReleaseName
+$ZipPath = Join-Path $ReleaseRoot "$ReleaseName.zip"
+
+Write-Host ""
+Write-Host "Building $ExtensionName $Version..." -ForegroundColor Cyan
+Write-Host ""
+
+# Only files required by the browser extension at runtime belong in the ZIP.
+# Everything else is excluded by default, including release output, previous
+# releases, scripts, repository metadata, documentation and development files.
+$IncludedItems = @(
+    "manifest.json",
+    "background.js",
+    "page-detection.js",
+    "presenter.js",
+    "controls.html",
+    "controls.css",
+    "controls.js",
+    "icons"
+)
+
+# Recreate the staging folder
+if (Test-Path $StagingFolder) {
+    Remove-Item $StagingFolder -Recurse -Force
+}
+
+New-Item -ItemType Directory -Path $StagingFolder -Force | Out-Null
+
+# Copy only the allowlisted runtime files into the clean staging folder
+$IncludedItems | ForEach-Object {
+    $SourcePath = Join-Path $ProjectRoot $_
+
+    if (-not (Test-Path $SourcePath)) {
+        Write-Host "ERROR: Required runtime item was not found: $_" -ForegroundColor Red
+        exit 1
+    }
+
+    Copy-Item `
+        -Path $SourcePath `
+        -Destination $StagingFolder `
+        -Recurse `
+        -Force
+}
+
+# Confirm that the copied release contains manifest.json
+$CopiedManifest = Join-Path $StagingFolder "manifest.json"
+
+if (-not (Test-Path $CopiedManifest)) {
+    Write-Host "ERROR: manifest.json was not copied into the release folder." -ForegroundColor Red
+    exit 1
+}
+
+# Remove any previous ZIP for this version
+if (Test-Path $ZipPath) {
+    Remove-Item $ZipPath -Force
+}
+
+# ZIP the contents, ensuring manifest.json is at the ZIP root
+$FilesToZip = Join-Path $StagingFolder "*"
+Compress-Archive `
+    -Path $FilesToZip `
+    -DestinationPath $ZipPath `
+    -CompressionLevel Optimal `
+    -Force
+
+# Verify the ZIP was created
+if (-not (Test-Path $ZipPath)) {
+    Write-Host "ERROR: The release ZIP could not be created." -ForegroundColor Red
+    exit 1
+}
+
+$ZipSize = [math]::Round((Get-Item $ZipPath).Length / 1KB, 1)
+
+Write-Host "Release created successfully!" -ForegroundColor Green
+Write-Host ""
+Write-Host "Release folder:"
+Write-Host "  $StagingFolder" -ForegroundColor Yellow
+Write-Host ""
+Write-Host "ZIP file:"
+Write-Host "  $ZipPath" -ForegroundColor Yellow
+Write-Host ""
+Write-Host "ZIP size: $ZipSize KB"
+Write-Host ""
+Write-Host "Ready for Gitea and the Chrome Web Store." -ForegroundColor Green