Force software rendering (SwiftShader) in Playwright Chromium to eliminate image downscaling drift between GPU-equipped local runs and headless CI runs in Argos screenshots.
Add `leaveAgentFeedback` and `leaveUserFeedback` assistant tools, reporting documentation findings to the site's team through the same path as the MCP `sendFeedback` tool, and record an `agent_feedback` insights event on both surfaces.
Assistant: the "Explored briefly" activity heading no longer appears when there's nothing to show. It now renders only when the answer is preceded by a real preamble or one or more tool calls, so a simple answer with an empty reasoning step no longer surfaces an empty collapsible.
Show the theme toggle in the footer whenever the outline column that hosts the other toggle isn't pinned open, so it stays reachable on laptop-sized screens in wide layouts and while the AI chat is open.
Give the prompt block a default "Copy prompt" action alongside "Open in Claude", "Open in Codex" and "Open in Cursor", and remember the visitor's last pick across every prompt block.
Fix the Docs Embed widget rendering with a dark surface when the visitor's OS is in dark mode, even on a light page or a site published with a light theme. The embed script now accepts `?theme=light|dark` to force a scheme.
Make the Docs Embed widget match the page it is embedded in rather than the visitor's OS: a widget on a light page stays light even when the visitor's system is in dark mode, and the widget's own chrome and the docs inside it always render in the same scheme. Sites published with a single theme impose it on the widget too, since they render in it regardless. The standalone script takes `?theme=light` on its URL, and calling `init` twice now updates the options instead of throwing.
A near-white tint color (e.g. a warm `#F5F3EF`) is now taken as the exact page background, mirroring the existing behavior for near-black tints. The tint's exact lightness, hue and chroma are preserved, and the color is anchored to whichever scale step the active theme renders as the background — so it matches exactly on `muted` (which uses the second step) as well as `clean`. This applies only to near-neutral tints that are light enough to read as a background; saturated or merely light-ish colors keep their normal accent scale. The `bold` theme is unaffected: it already uses the tint for the header and stays intentionally two-tone.
Introduce client-side content selection (`select`): a site-wide, recency-ordered list of selected slugs, persisted in localStorage and shareable via `?select=`, applied to `<html>` before first paint so the right variant renders with no flash. All variants stay server-rendered, so pages are byte-identical for every visitor (no cache impact).
Tabs now use it: switching a tab activates its slug, and every tab group offering that slug follows, across pages. Tabs no longer write to the URL fragment (`#` returns to anchors only); deep-links into a tab still activate and scroll to it.
Skip internal paths (`~gitbook/*`, `.well-known/oauth-protected-resource`, `llms.txt`, `robots.txt`, `sitemap.xml`, `rss.xml`) when building URL lookup alternatives, to avoid resolving URLs that can never match content.
Self-host default Google fonts and inline only the @font-face rules of the fonts a site uses, instead of shipping render-blocking stylesheets covering all 23 families on every page.
Add an optional `context` property (string, up to 512 characters) to the `confirmation` of custom AI tools, shown above the confirmation dialog to help the user understand what they are approving or rejecting. The `confirmation` can now also be a function that receives the AI-provided input and returns the confirmation, so the context can be derived dynamically from the arguments the tool is about to run with. Available both to integrations (`GitBookIntegrationTool`) and to embed consumers (`GitBookToolDefinition`).
Lazy load the Scalar API client modal and stop preloading the Scalar runtime. The modal is now code-split into its own chunk, fetched in parallel with the runtime only when a reader clicks "Test it", and a spinner is shown on the button until the client opens.
Breaking: the package no longer ships the modal in its main entry — consumers must serve the emitted `ScalarApiModal` chunk and use a bundler that supports dynamic `import()`, and the Scalar runtime is no longer preloaded on page load. The internal `preloadScalarRuntime` helper is removed.
Stop preloading the zoom-modal variant of every zoomable image at render time; it downloaded each image twice during the initial page load. The modal image still loads on hover or click.
Fix the page-actions dropdown closing before the "Copied" confirmation could be shown when copying the MCP server URL, an MCP install command, or the page as Markdown.
Submit `sendFeedback` MCP tool findings through the dedicated `submitSiteAgentFeedback` API endpoint. The `pageUrl` is now required and an optional `goal` can be provided.
Mermaid diagrams no longer hijack page scrolling: zooming with the wheel now requires holding Ctrl/Cmd inline, while the fullscreen view keeps free wheel zoom.
Persist content selection (tabs and other `select` blocks) in localStorage only, dropping the `?select=` query parameter from the URL. A tab click still writes the tab's hash, so a copied URL lands on that tab and reactivates it on load.
Serve `X-Robots-Tag: noindex` on internal search/assistant URLs (`?q=` / `?ask=`) and stop disallowing them in robots.txt, so Google can crawl the directive and drop them from the index instead of reporting "Indexed, though blocked by robots.txt".
Add an "On this page" table of contents on OpenAPI models pages. Each model in a grouped/multi-model "Models" section is now listed as its own section, matching operations and webhooks.
Keep the OpenAPI renderer out of the initial bundle of pages that have no OpenAPI block, by building its context on the client behind a dynamic boundary.
Move paragraph block styles behind a single `paragraph` class and drop the `page-cover-background:` gate from the cover-contrast text. The gate combined with the per-paragraph `:not(:has(...))` made every DOM insertion re-style all paragraphs, which froze very long pages.
Fix pages resolving to "not found" when a root URL lookup resolves to a custom homepage, by no longer using the homepage pathname as a prefix for the requested page path.
Inject site tracking scripts (analytics integrations) after `load` + idle instead of preloading them and executing them during the critical loading window.
Apply release notes tag filters from the URL via CSS before first paint, so the filtered entries, the "page contents" section list, and the tag chip highlighting all show correctly from the start on cached pages, with no flash of unfiltered content. Also stop the "page contents" scroll highlight from defaulting to an entry hidden by the filter.
Fix analytics and adaptive content silently breaking on sites served from a different host than the one configured (apex vs www, domain alias, CDN). The insights and visitor-claims endpoints are now requested relative to the page's own origin instead of the configured host, which a prerendered page cannot know.
Keep the traffic of GitBook's own preview deployments out of the sites' analytics, now that those requests reach the events endpoint.
Resolve stable page, space and file refs in images, definitions and HTML blocks of published markdown pages, instead of leaking internal `/pages/{id}`, `/spaces/{id}` and `/files/{id}` URLs.
Fail closed in `/~gitbook/revalidate` when `GITBOOK_SECRET` is not configured, returning `403 Revalidation is disabled` instead of skipping the signature check, consistent with `force-revalidate`.
Remove GBO's redundant re-selection of the best-scoring search section. The search API now returns a single highest-scoring section per page (and orders sections highest-score-first), so GBO no longer needs its own `getBestScoredResult` helper to pick the best section for the search and MCP previews. No user-visible change.
Embed: an explicit `?theme=light` / `?theme=dark` (the SDK `colorScheme` option) now reliably forces the embed's color scheme, even on sites where the theme toggle is disabled. Previously single-theme sites ignored the requested scheme.
Fix the docs embed not applying `?theme=light`/`?theme=dark`. The theme was dropped when the embed redirected to its default tab, and the embed tabs couldn't read it because they render statically (their request headers are empty). The middleware now threads a forced embed theme through the embed route context (scoped to the embed, not the main site), so the embed tabs honor it while staying statically rendered, and the redirect forwards it to the default tab. The forced theme is also persisted to the embed's own theme storage so it is remembered across tab navigation instead of only applying while the query string is present.
Fix the docs embed widget shipping a stale script: declare the embed package's `standalone/` bundle as a Turbo build output. Because it wasn't declared, changes confined to the standalone widget (which compiles to `standalone/` but not `dist/`) didn't invalidate the downstream `generate` cache that copies it into the app, so the deployed widget could lag the source — e.g. the `clipboard-write` permission on the widget iframe never reached production, breaking the copy button in the Assistant embed.
Fix code block syntax highlighting so comment delimiters (e.g. `//`, `/*`) use the same color as the rest of the comment. Previously the delimiter fell through to the generic punctuation scope, making it a different color from the comment body (most visible in dark mode).
Let ContentKit webframes dispatch the built-in `@ui.*` actions. Actions posted from a webframe were forwarded to the integration as a plain re-render instead of being handled, so `@ui.modal.open`, `@ui.modal.close` and `@ui.url.open` did nothing — most visibly, an integration could not close a modal from inside its own webframe.
Keep `null` values and class instances such as `Date` intact when resolving dynamic bindings in an action, instead of throwing or flattening them to `{}`.
Keep keyboard focus within search while the results are open.
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