Update memory allocation for Cloudflare's container instances to meet minimum requirements

- Introduced build ID management in cache set and delete operations to ensure entries are namespaced correctly.
- Updated the `getReadUrl` function to include build ID in the request URL.
- Enhanced tests to validate build ID inclusion in cache operations.

.changeset/ai-chat-view-activity-toggle.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix "View activity" disclosure in AI Chat not opening after the Base UI migration.

.changeset/anchor-scroll-unchanged-hash.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Scroll to an in-page heading even when the URL hash is unchanged (e.g. clicking the same anchor again).

.changeset/argos-image-rendering-drift.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Force software rendering (SwiftShader) in Playwright Chromium to eliminate image downscaling drift between GPU-equipped local runs and headless CI runs in Argos screenshots.

.changeset/assistant-submit-assistant-feedback-tool.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add an assistant tool to rate its own previous response when the user reacts to it.

.changeset/assistant-submit-page-feedback-tool.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add an assistant tool to submit feedback about the current page on behalf of the user.

.changeset/assistant-type-while-answering.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Assistant: you can now send follow-up questions while an answer is still being written. Each one appears as your own message with a "Queued" badge (hover for when it will send, × to cancel), and they're sent automatically one at a time as each answer completes.

.changeset/breadcrumbs-clear-page-actions.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Keep the breadcrumbs from covering the page actions' hit area.

.changeset/cache-tier-in-container-worker.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Move the incremental cache tier from the DO worker into the container worker.

.changeset/cards-carousel-layout.md

@@ -0,0 +1,5 @@
+---
+"gitbook": minor
+---
+
+Add a carousel layout option to cards blocks, rendering them as a horizontally-scrolling, scroll-snapping row instead of a wrapping grid.

.changeset/collapsible-reasoning-heading.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/container-server-tier.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add a container server tier: an `@opennextjs/aws` node build of the app running inside a Cloudflare Container, reaching the cache worker through the container Durable Object's outbound handler. Build it with `bun run build:all` and run it locally with `bun run dev:cf:container`.

.changeset/deploy-container-tier.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Deploy the container server tier from CI to preview, staging and production. Preview and staging serve their traffic from the container; production deploys it but keeps serving from the workerd tier.

.changeset/embed-host-actions.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix host action buttons in the Docs Embed not reaching the assistant.

.changeset/embed-navigate-to-page-normalize.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix the docs embed `navigateToPage` API on multi-space sites. Deep-linking to a page in a different space/section (e.g. `navigateToPage('/help-center/integrations')`) previously 404'd because the section base was not placed before `~gitbook/embed/page`. The target is now resolved to its space server-side, so pages in any space resolve correctly. The input accepts the page path, an absolute path, or the full published URL.

.changeset/embed-search-suggestions.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix suggested question clicks in the embed search not opening the assistant.

.changeset/embed-search-tab-navigation.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix switching from the Search tab to the Docs or Assistant tab in the embed doing nothing.

.changeset/empty-bears-cheat.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add configurable default visibility to Prompt block

.changeset/exact-light-tint-background.md

@@ -0,0 +1,6 @@
+---
+"@gitbook/colors": patch
+"gitbook": patch
+---
+
+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.

.changeset/fancy-webs-sneeze.md

@@ -0,0 +1,7 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/few-parts-lead.md

@@ -0,0 +1,7 @@
+---
+"@gitbook/openapi-parser": patch
+"@gitbook/react-openapi": patch
+"gitbook": patch
+---
+
+Add missing link reference to OpenAPI models

.changeset/funky-jobs-know.md

@@ -0,0 +1,5 @@
+---
+'gitbook': patch
+---
+
+Update the URL hash when a tab is selected, so a copied link scrolls back to that tab

.changeset/hot-views-judge.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add cover image background mode and masks

.changeset/inline-button-size.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Button blocks now respect the `size` option, so you can render small, medium, or large buttons.

.changeset/integration-tool-context.md

@@ -0,0 +1,7 @@
+---
+"@gitbook/browser-types": patch
+"@gitbook/embed": patch
+"gitbook": patch
+---
+
+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`).

.changeset/lazy-mermaid-code-block.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Lazy-load the Mermaid code block so pages that have code blocks but no diagram no longer ship its rendering dependencies.

.changeset/lazy-scalar-modal.md

@@ -0,0 +1,8 @@
+---
+"@gitbook/react-openapi": major
+"gitbook": patch
+---
+
+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.

.changeset/mcp-ask-question-tool.md

@@ -0,0 +1,5 @@
+---
+"gitbook": minor
+---
+
+Add an `askQuestion` tool to the site MCP server. Alongside `searchDocumentation` and `getPage`, MCP clients can now ask a natural-language question and get a synthesized answer with links to the source pages, powered by the same AI search backend as the site's "ask a question" experience. The tool accepts an optional `goal` param so calling agents can attach the intent they're trying to accomplish, which tailors the answer and is tracked in analytics. The tool is only exposed on sites that have AI enabled.

.changeset/mcp-send-feedback-endpoint.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Submit `sendFeedback` MCP tool findings through the dedicated `submitSiteAgentFeedback` API endpoint. The `pageUrl` is now required and an optional `goal` can be provided.

.changeset/mermaid-scroll-zoom-modifier.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/migrate-headless-primitives-to-base-ui.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Migrate the headless UI primitives from Radix and react-aria to Base UI.

.changeset/moody-nails-admire.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/noindex-search-ask-urls.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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".

.changeset/olive-pumas-invite.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix the variant switcher linking to the wrong URL for non-default variants of the default section

.changeset/openapi-models-on-this-page.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/openapi-scalar-proxy-cookies.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Improve cookie handling in the OpenAPI "Test it" request proxy.

.changeset/openapi-scalar-proxy-origin.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Serve the OpenAPI "Test it" request proxy from GitBook's own domain.

.changeset/openapi-serializable-context.md

@@ -0,0 +1,6 @@
+---
+"gitbook": patch
+"@gitbook/react-openapi": minor
+---
+
+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.

.changeset/openapi-webhook-payload-scroll.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix OpenAPI webhook payload and schema example panels being clipped instead of scrollable.

.changeset/prev-next-alignment.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Align the Previous page navigation button to the left edge and the Next button to the right edge, including when only one of them is present.

.changeset/quiet-pans-listen.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix text disappearing in Firefox and iOS Safari on pages with a background cover

.changeset/quiet-rivers-render.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Render a site-space custom home page at its placement root while preserving the full space and normal page URLs.

.changeset/rnd-11356-remove-gbo-bestsection.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/rnd-11571-embed-light-theme.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/rnd-11616-responses-selector-sync.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Sync the API reference responses selector with the "Responses" collapsibles, and keep the selected response in sync across every operation on the page (like the code sample language selector). Selecting a status code now expands the matching response section and applies to all operations at once.

.changeset/rnd-11643-fix-system-theme-flash.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix a light/dark flash on published sites configured to respect the system default (no theme toggle). Such sites forced the `system` theme, but `next-themes`' pre-paint script applies a forced value verbatim without resolving `prefers-color-scheme`, so the page painted light and only switched to dark after hydration. We now leave the theme unforced when the default is `system` (only concrete light/dark themes are forced), letting `next-themes`' existing pre-paint script resolve the system preference before first paint.

.changeset/rnd-11847-mcp-send-feedback.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add a `sendFeedback` MCP tool so AI agents can report documentation findings (outdated / incoherent / gap / other) as `agent_feedback` insights events. The tool only accepts finding categories, so it never records positive feedback.

.changeset/rnd-11847-separate-prompt-block-actions.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Separate the prompt block actions into a primary "Open in" dropdown and a secondary "Copy prompt" button, instead of a single combined button group, and align the block's design with the expandable block (bordered frame, left disclosure chevron, and subtle elevation when expanded).

.changeset/rnd-11876-embed-standalone-turbo-output.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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.

.changeset/rnd-12204-comment-punctuation-color.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+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).

.changeset/scroll-container-overflow-state.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix ScrollContainer scroll buttons not reflecting content overflow immediately or after dynamic content changes (e.g. search results).

.changeset/search-input-spacebar.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix the spacebar being ignored in the search bar, which made multi-word queries impossible.

.changeset/search-last-query.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Keep the last search query visible after closing search, and restore it when reopening, without breaking navigation when clicking a search result.

.changeset/search-result-page-target.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Link page-level search matches to the top of the page while preserving section anchors for section matches.

.changeset/shiki-out-of-initial-bundle.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Keep Shiki out of the initial page bundle by splitting the highlighter from the plain-text token helpers, so client code no longer pulls the engine and language bundles in through a shared import.

.changeset/shorten-paragraph-ask-tooltip.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Refine the per-paragraph AI ask button: shorten its tooltip to "Ask" (from "Ask <assistant> about this"), and hide it inside cards where it would otherwise be clipped by the card's overflow.

.changeset/split-site-search-requests.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Split the default-scope site search into two parallel API requests — one restricted to the current site space and one for the other site spaces — rendering each result set as soon as its response arrives. All results are ranked together by score, with the current site space scores boosted.

.changeset/sticky-api-page-actions.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Keep the "On this page" and "Ask" buttons pinned below the header while scrolling on desktop API reference pages, so the page outline stays reachable throughout long operations.

.changeset/strict-jokes-play.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Hide unfocusable unlabelled button from screen readers

.changeset/stricter-back-to-space.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Only show the "Back to [space]" shortcut for cross-space links in the table of contents, not for in-content text links or other ways of reaching another space.

.changeset/svg-file-attachment-previews.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Show image thumbnails, including SVG previews, for file attachments on published sites.

.changeset/table-search-empty-padding.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Make the table search "no results" empty state more prominent with vertical spacing so it no longer blends into the content below.

.changeset/tap-to-reveal-heading-anchor.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix heading anchor links being unreachable on touch devices by adding a tap-to-reveal state. The anchor icon now appears after the heading text without wrapping onto an orphan line while retaining its existing desktop placement. Use `pointerup` for the dismiss listener to fix unreliable dismissal on iOS Safari, and enlarge the anchor's touch tap target to a square 24px area (meeting the WCAG 2.5.8 minimum) so the icon stays centered instead of overflowing shorter headings' line height.

.changeset/tidy-donkeys-shave.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix search results from a previous scope staying stuck on top of the new results when switching the search filter.

.changeset/tired-mails-fall.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Support localized custom AI Assistant greeting subtitles.

.changeset/tooltip-disclosure-open-state-conflict.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix chevrons and open-state styling incorrectly reacting to a tooltip opening on the same trigger, by switching from the shared Base UI `data-popup-open` attribute to `aria-expanded`.

.changeset/wacky-eyes-post.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+a11y screen reader fixes

.changeset/webframe-navigate.md

@@ -0,0 +1,6 @@
+---
+"@gitbook/react-contentkit": patch
+"gitbook": patch
+---
+
+Let integration block webframes navigate the reader to another page in the site by posting a `@webframe.navigate` action with a `path` (and optional `anchor`). Resolved client-side against the site base path, so navigation stays in-site and drives the standard navigation progress bar.

.changeset/webframe-page-context.md

@@ -0,0 +1,6 @@
+---
+"@gitbook/react-contentkit": patch
+"gitbook": patch
+---
+
+Expose the current page (`id`, `path`, `title`) to integration block webframes through the client-only webframe `state.page`, alongside adaptive visitor claims.

.changeset/whole-hands-report.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix an issue where certain keywords could cause an exception when rendering emojis

.changeset/wild-suns-relate.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Add the `select` action to InlineButton. Clicking the button activates its slug, so any block containing that slug switches to it.

.claude/launch.json

@@ -0,0 +1,12 @@
+{
+    "version": "0.0.1",
+    "configurations": [
+        {
+            "name": "🚀 Dev server",
+            "runtimeExecutable": "sh",
+            "runtimeArgs": ["-c", "bun install && bun dev"],
+            "port": 3000,
+            "autoPort": false
+        }
+    ]
+}

.editorconfig

@@ -0,0 +1,10 @@
+# Stop editors from looking for .editorconfig files in parent directories.
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+max_line_length = 100

.github/CODEOWNERS

@@ -0,0 +1,3 @@
+# Changes to the API data cache functions can invalidate all existing data cache
+# causing a massive amount of revalidation, impacting our API.
+packages/gitbook/src/lib/data/api.ts   @SamyPesse

.github/CONTRIBUTING.md

@@ -1,6 +1,8 @@
 # Welcome to GitBook's contributing guide!
 
-Thank you for investing your time in contributing to GitBook. Any contribution you make will be reviewed by our team.In this guide, you'll learn the different ways you can contribute.
+> _For help, support, feature requests, and product questions - head to our [GitHub Community](https://github.com/orgs/GitbookIO/discussions) 🤖_
+
+Thank you for investing your time in contributing to GitBook. Any contribution you make will be reviewed by our team. In this guide, you'll learn the different ways you can contribute.
 
 ## Types of Contributions
 
@@ -45,13 +47,50 @@ Any contribution you make can be made to the code located in this repository. In
 
 -   [Fork the repo](https://docs.github.com/en/github/getting-started-with-github/fork-a-repo#fork-an-example-repository) so that you can make your changes without affecting the original project until you're ready to merge them.
 
-##### GitHub Codespaces:
-
--   [Fork, edit, and preview](https://docs.github.com/en/free-pro-team@latest/github/developing-online-with-codespaces/creating-a-codespace) using [GitHub Codespaces](https://github.com/features/codespaces) without having to install and run the project locally.
-
 #### 2. Create a working branch and start with your changes
 
-After forking this repository, you'll want to [create a branch](https://docs.github.com/en/issues/tracking-your-work-with-issues/creating-a-branch-for-an-issue) to work off of. After creating the branch, you can start making changes!
+After forking this repository, you'll want to [create a branch](https://docs.github.com/en/issues/tracking-your-work-with-issues/creating-a-branch-for-an-issue) to work off of.
+
+#### 3. Install dependencies and run the project locally
+
+##### Prerequisites:
+
+- [Node.js](https://nodejs.org/en) (see "engines" in `package.json`)
+- [Bun](https://bun.sh/) (see "packageManager" in `package.json`)
+
+##### Setup steps:
+
+1. Ensure you are using the project's version of Node:
+```bash
+nvm use
+```
+
+2. Install dependencies using Bun:
+```bash
+bun install
+```
+
+3. Start the development server:
+```bash
+bun dev
+```
+
+Additional development commands:
+- `bun lint`: Lint the code using Oxlint
+- `bun lint:fix`: Automatically fix lint issues using Oxlint
+- `bun format`: Format the code using Oxfmt
+- `bun format:check`: Check formatting without changing files
+- `bun typecheck`: Run TypeScript type checking
+- `bun unit`: Run unit tests
+- `bun e2e`: Run end-to-end tests
+
+#### 4. Preview your changes
+
+When running the development server, published GitBook sites can be rendered through your local version at `http://localhost:3000/url`.
+
+For example, our published docs can be viewed using the local version by visiting `http://localhost:3000/url/gitbook.com/docs` after running the development server.
+
+You can visit any published GitBook site behind your development server. Please make sure your site is [published publicly](https://gitbook.com/docs/published-documentation/publish-your-content-as-a-docs-site) to ensure you can view the site correctly in your development version.
 
 ### Commit your update
 
@@ -71,4 +110,4 @@ When you're finished with the changes, [create a pull request](https://docs.gith
 
 ### Your PR is merged
 
-Congratulations 🎉Thank you for your contribution! Once your PR is merged, your contributions will be publicly visible on the relevant repository.
+Congratulations 🎉 Thank you for your contribution! Once your PR is merged, your contributions will be publicly visible on the relevant repository.

.github/actions/gradual-deploy-cloudflare/action.yaml

@@ -0,0 +1,83 @@
+name: Gradual Deploy to Cloudflare
+description: Use gradual deployment to deploy to Cloudflare. This action will upload the middleware and server versions to Cloudflare and kept them bound together
+inputs:
+    apiToken:
+        description: 'Cloudflare API token'
+        required: true
+    accountId:
+        description: 'Cloudflare account ID'
+        required: true
+    environment:
+        description: 'Cloudflare environment to deploy to (staging, production, preview)'
+        required: true
+    middlewareVersionId:
+        description: 'Middleware version ID to deploy'
+        required: true
+    serverVersionId:
+        description: 'Server version ID to deploy'
+        required: true
+outputs:
+    deployment-url:
+        description: 'Deployment URL'
+        value: ${{ steps.deploy_middleware.outputs.deployment-url }}
+runs:
+    using: 'composite'
+    steps:
+        - id: wrangler_status
+          name: Check wrangler deployment status
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: deployments status --config ./packages/gitbook/openNext/customWorkers/defaultWrangler.jsonc
+
+        # This step is used to get the version ID that is currently deployed to Cloudflare.
+        - id: extract_current_version
+          name: Extract current version
+          shell: bash
+          run: |
+              version_id=$(echo "${{ steps.wrangler_status.outputs.command-output }}" | grep -A 3 "(100%)" | grep -oP '[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}')
+              echo "version_id=$version_id" >> $GITHUB_OUTPUT
+
+        - id: deploy_server
+          name: Deploy server to Cloudflare at 0%
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: versions deploy ${{ steps.extract_current_version.outputs.version_id }}@100% ${{ inputs.serverVersionId }}@0% -y --config ./packages/gitbook/openNext/customWorkers/defaultWrangler.jsonc
+
+        # Since we use version overrides headers, we can directly deploy the middleware to 100%.
+        - id: deploy_middleware
+          name: Deploy middleware to Cloudflare at 100%
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: versions deploy ${{ inputs.middlewareVersionId }}@100% -y --config ./packages/gitbook/openNext/customWorkers/middlewareWrangler.jsonc
+
+        - name: Deploy server to Cloudflare at 100%
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: versions deploy ${{ inputs.serverVersionId }}@100% -y --config ./packages/gitbook/openNext/customWorkers/defaultWrangler.jsonc
+
+        - name: Outputs
+          shell: bash
+          env:
+              DEPLOYMENT_URL: ${{ steps.deploy_middleware.outputs.deployment-url }}
+          run: |
+              echo "URL: ${{ steps.deploy_middleware.outputs.deployment-url }}"

.github/actions/setup-playwright/action.yml

@@ -1,35 +0,0 @@
-name: 'Setup Playwright'
-description: 'Install Playwright and dependencies'
-runs:
-    using: 'composite'
-    steps:
-        # Run npm ci and get Playwright version
-        - name: 🏗 Prepare Playwright env
-          shell: bash
-          run: |
-              PLAYWRIGHT_VERSION=$(npm ls --json @playwright/test | jq --raw-output '.dependencies["@playwright/test"].version')
-              echo "PLAYWRIGHT_VERSION=$PLAYWRIGHT_VERSION" >> $GITHUB_ENV
-
-        # Cache browser binaries, cache key is based on Playwright version and OS
-        - name: 🧰 Cache Playwright browser binaries
-          uses: actions/cache@v3
-          id: playwright-cache
-          with:
-              path: '~/.cache/ms-playwright'
-              key: '${{ runner.os }}-playwright-${{ env.PLAYWRIGHT_VERSION }}'
-              restore-keys: |
-                  ${{ runner.os }}-playwright-
-
-        # Install browser binaries & OS dependencies if cache missed
-        - name: 🏗 Install Playwright browser binaries & OS dependencies
-          if: steps.playwright-cache.outputs.cache-hit != 'true'
-          shell: bash
-          run: |
-              bun x playwright install --with-deps chromium
-
-        # Install only the OS dependencies if cache hit
-        - name: 🏗 Install Playwright OS dependencies
-          if: steps.playwright-cache.outputs.cache-hit == 'true'
-          shell: bash
-          run: |
-              bun x playwright install-deps

.github/composite/deploy-cloudflare/action.yaml

@@ -0,0 +1,183 @@
+name: 'Deploy cloudflare'
+description: 'Deploy GitBook to Cloudflare'
+inputs:
+    opItem:
+        description: '1Password item to load secrets from'
+        required: true
+    opServiceAccount:
+        description: '1Password service account token'
+        required: true
+    apiToken:
+        description: 'Cloudflare API token'
+        required: true
+    accountId:
+        description: 'Cloudflare account ID'
+        required: true
+    environment:
+        description: 'Cloudflare environment to deploy to (staging, production, preview)'
+        required: true
+    deploy:
+        description: 'Deploy as main version for all traffic instead of uploading versions'
+        required: true
+    commitTag:
+        description: 'Commit branch to associate with the deployment'
+        required: true
+    commitMessage:
+        description: 'Commit message to associate with the deployment'
+        required: true
+    headSha:
+        description: 'Git ref being deployed, used for the deploymentId. Falls back to GITHUB_SHA'
+        required: false
+outputs:
+    deployment-url:
+        description: 'Deployment URL'
+        value: ${{ steps.upload_middleware.outputs.deployment-url }}
+runs:
+    using: 'composite'
+    steps:
+        - name: Setup Bun
+          uses: ./.github/composite/setup-bun
+        - name: Install dependencies
+          run: bun install --frozen-lockfile
+          shell: bash
+          env:
+              PUPPETEER_SKIP_DOWNLOAD: 1
+        - name: Load secret
+          uses: 1password/load-secrets-action@v2
+          env:
+              OP_SERVICE_ACCOUNT_TOKEN: ${{ inputs.opServiceAccount }}
+              GITBOOK_URL: ${{ inputs.opItem }}/GITBOOK_URL
+              GITBOOK_ICONS_URL: ${{ inputs.opItem }}/GITBOOK_ICONS_URL
+              GITBOOK_ICONS_TOKEN: ${{ inputs.opItem }}/GITBOOK_ICONS_TOKEN
+              NEXT_SERVER_ACTIONS_ENCRYPTION_KEY: ${{ inputs.opItem }}/NEXT_SERVER_ACTIONS_ENCRYPTION_KEY
+              GITBOOK_SECRET: ${{ inputs.opItem }}/GITBOOK_SECRET
+              GITBOOK_APP_URL: ${{ inputs.opItem }}/GITBOOK_APP_URL
+              GITBOOK_API_URL: ${{ inputs.opItem }}/GITBOOK_API_URL
+              GITBOOK_API_PUBLIC_URL: ${{ inputs.opItem }}/GITBOOK_API_PUBLIC_URL
+              GITBOOK_API_TOKEN: ${{ inputs.opItem }}/GITBOOK_API_TOKEN
+              GITBOOK_OAUTH_SERVER_URL: ${{ inputs.opItem }}/GITBOOK_OAUTH_SERVER_URL
+              GITBOOK_SITE_OAUTH_SIGNING_SECRET: ${{ inputs.opItem }}/GITBOOK_SITE_OAUTH_SIGNING_SECRET
+              GITBOOK_PREVIEW_BASE_URL: ${{ inputs.opItem }}/GITBOOK_PREVIEW_BASE_URL
+              GITBOOK_INTEGRATIONS_HOST: ${{ inputs.opItem }}/GITBOOK_INTEGRATIONS_HOST
+              GITBOOK_INTEGRATIONS_CONTENT_HOST: ${{ inputs.opItem }}/GITBOOK_INTEGRATIONS_CONTENT_HOST
+              GITBOOK_IMAGE_RESIZE_SIGNING_KEY: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_SIGNING_KEY
+              GITBOOK_IMAGE_RESIZE_URL: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_URL_2
+              GITBOOK_IMAGE_RESIZE_SALT: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_SALT
+              GITBOOK_IMAGE_RESIZE_MODE: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_MODE
+              GITBOOK_ASSETS_PREFIX: ${{ inputs.opItem }}/GITBOOK_ASSETS_PREFIX
+              GITBOOK_FONTS_URL: ${{ inputs.opItem }}/GITBOOK_FONTS_URL
+        # `build:all` shares a single `next build` between the workerd tier (.open-next) and the
+        # container tier (.open-next-container), so both are built from the same bundle.
+        - name: Build worker
+          run: bun run turbo build:all
+          env:
+              GITBOOK_RUNTIME: cloudflare
+              # `pull_request_target` sets GITHUB_SHA to the base branch tip, identical for every
+              # commit of a PR, which would keep the deployment ID (and its cache) unchanged.
+              GITBOOK_HEAD_SHA: ${{ inputs.headSha }}
+              VERCEL_TARGET_ENV: ${{ inputs.environment }}
+              GITBOOK_BLOCK_SEARCH_INDEXATION: ${{ inputs.environment == 'preview' && 'true' || '' }}
+              GITBOOK_ALLOW_CUSTOMIZATION_OVERRIDE: ${{ inputs.environment == 'preview' && 'true' || '' }}
+          shell: bash
+
+        - id: extract_deployment_id
+          name: Extract Next deployment ID
+          shell: bash
+          run: |
+              deployment_id=$(bun -e '
+                  const buildOutput = await Bun.file("packages/gitbook/.open-next/server-functions/default/packages/gitbook/.next/required-server-files.json").json();
+                  const deploymentId = buildOutput.config?.deploymentId;
+                  if (!deploymentId) throw new Error("Next build did not emit a deployment ID");
+                  console.log(deploymentId);
+              ')
+              echo "deployment_id=$deployment_id" >> $GITHUB_OUTPUT
+
+        - name: Upload the DO worker
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: ${{ format('deploy --var OPEN_NEXT_BUILD_ID:{0} --config ./packages/gitbook/openNext/customWorkers/doWrangler.jsonc', steps.extract_deployment_id.outputs.deployment_id) }}
+
+        # `versions upload` never builds or pushes the container image, so the container tier uses
+        # `deploy` like the DO worker. It runs after the DO worker (whose Durable Objects it binds)
+        # and before the server and middleware (which read the cache tier it now hosts).
+        #
+        # `--x-provision=false` disables Wrangler's resource provisioning. It is on by default and
+        # probes the R2 API for any binding the deployed Worker does not already have, which our
+        # API token has no permission for. Every bucket here already exists, so there is nothing to
+        # provision.
+        - name: Deploy the container worker
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: ${{ format('deploy --x-provision=false --var OPEN_NEXT_BUILD_ID:{0} --config ./packages/gitbook/openNext/customWorkers/containerWrangler.jsonc', steps.extract_deployment_id.outputs.deployment_id) }}
+
+        - id: upload_server
+          name: Upload server to Cloudflare
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: ${{ format('versions upload --tag {0} --message "{1}"', inputs.commitTag, inputs.commitMessage) }} --config ./packages/gitbook/openNext/customWorkers/defaultWrangler.jsonc
+
+        - name: Extract server version worker ID
+          shell: bash
+          id: extract_server_version_id
+          run: |
+              version_id=$(echo '${{ steps.upload_server.outputs.command-output }}' | grep "Worker Version ID" | awk '{print $4}')
+              echo "version_id=$version_id" >> $GITHUB_OUTPUT
+
+        - name: Run updateWrangler scripts
+          shell: bash
+          run: |
+              bun run ./packages/gitbook/openNext/customWorkers/script/updateWrangler.ts ${{ steps.extract_server_version_id.outputs.version_id }}
+
+        - id: upload_middleware
+          name: Upload middleware to Cloudflare
+          uses: cloudflare/wrangler-action@v3.14.0
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              workingDirectory: ./
+              wranglerVersion: '4.122.0'
+              environment: ${{ inputs.environment }}
+              command: ${{ format('versions upload --tag {0} --message "{1}"', inputs.commitTag, inputs.commitMessage) }} --config ./packages/gitbook/openNext/customWorkers/middlewareWrangler.jsonc
+
+        - name: Extract middleware version worker ID
+          shell: bash
+          id: extract_middleware_version_id
+          run: |
+              version_id=$(echo '${{ steps.upload_middleware.outputs.command-output }}' | grep "Worker Version ID" | awk '{print $4}')
+              echo "version_id=$version_id" >> $GITHUB_OUTPUT
+
+        - name: Deploy server and middleware to Cloudflare
+          if: ${{ inputs.deploy == 'true' }}
+          uses: ./.github/actions/gradual-deploy-cloudflare
+          with:
+              apiToken: ${{ inputs.apiToken }}
+              accountId: ${{ inputs.accountId }}
+              opServiceAccount: ${{ inputs.opServiceAccount }}
+              opItem: ${{ inputs.opItem }}
+              environment: ${{ inputs.environment }}
+              serverVersionId: ${{ steps.extract_server_version_id.outputs.version_id }}
+              middlewareVersionId: ${{ steps.extract_middleware_version_id.outputs.version_id }}
+              deploy: ${{ inputs.deploy }}
+
+        - name: Outputs
+          shell: bash
+          env:
+              DEPLOYMENT_URL: ${{ steps.upload_middleware.outputs.deployment-url }}
+          run: |
+              echo "URL: ${{ steps.upload_middleware.outputs.deployment-url }}"
+              echo "Output server: ${{ steps.upload_server.outputs.command-output }}"

.github/composite/deploy-vercel/action.yaml

@@ -0,0 +1,100 @@
+name: 'Deploy vercel'
+description: 'Deploy GitBook to Vercel'
+inputs:
+    vercelOrg:
+        description: 'Vercel organization'
+        required: true
+    vercelProject:
+        description: 'Vercel project'
+        required: true
+    vercelToken:
+        description: 'Vercel token'
+        required: true
+    opItem:
+        description: '1Password item to load secrets from'
+        required: true
+    opServiceAccount:
+        description: '1Password service account token'
+        required: true
+    environment:
+        description: 'Environment to deploy to'
+        required: true
+    headSha:
+        description: 'Git ref to deploy, used for the deploymentId'
+        required: false
+outputs:
+    deployment-url:
+        description: 'Deployment URL'
+        value: ${{ steps.deploy.outputs.deployment-url }}
+runs:
+    using: 'composite'
+    steps:
+        - name: Setup Bun
+          uses: ./.github/composite/setup-bun
+        - name: Install dependencies
+          run: bun install --frozen-lockfile
+          shell: bash
+          env:
+              PUPPETEER_SKIP_DOWNLOAD: 1
+        - name: Pull Vercel Environment Information
+          run: bun run vercel pull --yes --environment=${{ inputs.environment }} --token=${{ inputs.vercelToken }}
+          shell: bash
+          env:
+              VERCEL_ORG_ID: ${{ inputs.vercelOrg }}
+              VERCEL_PROJECT_ID: ${{ inputs.vercelProject }}
+        - name: Load secret
+          uses: 1password/load-secrets-action@v2
+          env:
+              OP_SERVICE_ACCOUNT_TOKEN: ${{ inputs.opServiceAccount }}
+              GITBOOK_URL: ${{ inputs.opItem }}/GITBOOK_URL
+              GITBOOK_ICONS_URL: ${{ inputs.opItem }}/GITBOOK_ICONS_URL
+              GITBOOK_ICONS_TOKEN: ${{ inputs.opItem }}/GITBOOK_ICONS_TOKEN
+              GITBOOK_SECRET: ${{ inputs.opItem }}/GITBOOK_SECRET
+              GITBOOK_APP_URL: ${{ inputs.opItem }}/GITBOOK_APP_URL
+              GITBOOK_API_URL: ${{ inputs.opItem }}/GITBOOK_API_URL
+              GITBOOK_API_PUBLIC_URL: ${{ inputs.opItem }}/GITBOOK_API_PUBLIC_URL
+              GITBOOK_API_TOKEN: ${{ inputs.opItem }}/GITBOOK_API_TOKEN
+              GITBOOK_OAUTH_SERVER_URL: ${{ inputs.opItem }}/GITBOOK_OAUTH_SERVER_URL
+              GITBOOK_SITE_OAUTH_SIGNING_SECRET: ${{ inputs.opItem }}/GITBOOK_SITE_OAUTH_SIGNING_SECRET
+              GITBOOK_PREVIEW_BASE_URL: ${{ inputs.opItem }}/GITBOOK_PREVIEW_BASE_URL
+              GITBOOK_INTEGRATIONS_HOST: ${{ inputs.opItem }}/GITBOOK_INTEGRATIONS_HOST
+              GITBOOK_INTEGRATIONS_CONTENT_HOST: ${{ inputs.opItem }}/GITBOOK_INTEGRATIONS_CONTENT_HOST
+              GITBOOK_IMAGE_RESIZE_SIGNING_KEY: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_SIGNING_KEY
+              GITBOOK_IMAGE_RESIZE_URL: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_URL_2
+              GITBOOK_IMAGE_RESIZE_SALT: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_SALT
+              GITBOOK_IMAGE_RESIZE_MODE: ${{ inputs.opItem }}/GITBOOK_IMAGE_RESIZE_MODE
+              GITBOOK_ASSETS_PREFIX: ${{ inputs.opItem }}/GITBOOK_ASSETS_PREFIX
+              GITBOOK_FONTS_URL: ${{ inputs.opItem }}/GITBOOK_FONTS_URL
+        - name: Inject build env vars
+          if: ${{ inputs.environment == 'preview' }}
+          shell: bash
+          run: |
+              HEAD_SHA=$(git rev-parse HEAD)
+              echo "resolved HEAD_SHA: $HEAD_SHA"
+              echo "GITBOOK_HEAD_SHA=$HEAD_SHA" >> .vercel/.env.${{ inputs.environment }}.local
+              echo "GITBOOK_RUNTIME=vercel" >> .vercel/.env.${{ inputs.environment }}.local
+              echo "GITBOOK_BLOCK_SEARCH_INDEXATION=true" >> .vercel/.env.${{ inputs.environment }}.local
+              echo "GITBOOK_ALLOW_CUSTOMIZATION_OVERRIDE=true" >> .vercel/.env.${{ inputs.environment }}.local
+              echo "--- .vercel/.env.${{ inputs.environment }}.local after inject ---"
+              cat .vercel/.env.${{ inputs.environment }}.local
+        - name: Build Project Artifacts
+          run: bun run vercel build --target=${{ inputs.environment }} --token=${{ inputs.vercelToken }}
+          shell: bash
+          env:
+              VERCEL_ORG_ID: ${{ inputs.vercelOrg }}
+              VERCEL_PROJECT_ID: ${{ inputs.vercelProject }}
+              GITBOOK_RUNTIME: vercel
+              GITBOOK_HEAD_SHA: ${{ inputs.headSha }}
+        - name: Deploy Project Artifacts to Vercel
+          id: deploy
+          shell: bash
+          run: |
+              DEPLOYMENT_URL=$(bun run vercel deploy --prebuilt --target=${{ inputs.environment }} --token=${{ inputs.vercelToken }})
+              echo "deployment-url=$DEPLOYMENT_URL" >> "$GITHUB_OUTPUT"
+          env:
+              VERCEL_ORG_ID: ${{ inputs.vercelOrg }}
+              VERCEL_PROJECT_ID: ${{ inputs.vercelProject }}
+        - name: Outputs
+          shell: bash
+          run: |
+              echo "URL: ${{ steps.deploy.outputs.deployment-url }}"

.github/composite/setup-bun/action.yaml

@@ -0,0 +1,9 @@
+name: 'Setup Bun'
+description: 'Install Bun and cache dependencies'
+runs:
+    using: 'composite'
+    steps:
+        - name: Setup bun
+          uses: oven-sh/setup-bun@v2
+          with:
+              bun-version-file: 'package.json'

.github/workflows/ci.yaml

@@ -4,124 +4,17 @@ on:
     push:
         branches:
             - main
-
+            - changeset-release/main
 jobs:
-    deploy:
-        name: Deploy to Cloudflare Pages
-        runs-on: ubuntu-latest
-        permissions:
-            contents: read
-            deployments: write
-        outputs:
-            deployment_url: ${{ steps.cloudflare.outputs.url }}
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
-            - name: Install dependencies
-              run: bun install --frozen-lockfile
-              env:
-                  PUPPETEER_SKIP_DOWNLOAD: 1
-            - name: Cache Next.js build
-              uses: actions/cache@v3
-              with:
-                  path: |
-                      ${{ github.workspace }}/.next/cache
-                  # Generate a new cache whenever packages or source files change.
-                  key: ${{ runner.os }}-nextjs-${{ hashFiles('**/bun.lockb') }}-${{ hashFiles('**/*.js', '**/*.jsx', '**/*.ts', '**/*.tsx') }}
-                  # If source files changed but packages didn't, rebuild from a prior cache.
-                  restore-keys: |
-                      ${{ runner.os }}-nextjs-${{ hashFiles('**/bun.lockb') }}-
-            - name: Sets env vars for production
-              run: |
-                  echo "SENTRY_ENVIRONMENT=production" >> $GITHUB_ENV
-                  echo "GITBOOK_ASSETS_PREFIX=https://static.gitbook.com" >> $GITHUB_ENV
-              if: startsWith(github.ref, 'refs/heads/main')
-            - name: Sets env vars for preview
-              run: |
-                  echo "SENTRY_ENVIRONMENT=preview" >> $GITHUB_ENV
-              if: 1 && !startsWith(github.ref, 'refs/heads/main')
-            - name: Build Next.js with next-on-pages
-              run: bun run build:cloudflare
-              env:
-                  SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
-                  SENTRY_ORG: ${{ vars.SENTRY_ORG }}
-                  SENTRY_PROJECT: ${{ vars.SENTRY_PROJECT }}
-                  SENTRY_DSN: ${{ vars.SENTRY_DSN }}
-            - id: cloudflare
-              name: Publish to Cloudflare Pages
-              uses: cloudflare/pages-action@v1
-              with:
-                  apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
-                  accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
-                  projectName: ${{ vars.CLOUDFLARE_PROJECT_NAME }}
-                  directory: ./packages/gitbook/.vercel/output/static
-                  gitHubToken: ${{ secrets.GITHUB_TOKEN }}
-                  workingDirectory: ./
-            - name: Outputs
-              run: |
-                  echo "ID: ${{ steps.cloudflare.outputs.id }}"
-                  echo "URL: ${{ steps.cloudflare.outputs.url }}"
-                  echo "Environment: ${{ steps.cloudflare.outputs.environment }}"
-                  echo "Alias: ${{ steps.cloudflare.outputs.alias }}"
-            - name: Archive build output
-              uses: actions/upload-artifact@v4
-              with:
-                  name: build-output
-                  path: .vercel/
-    visual-testing:
-        runs-on: ubuntu-latest
-        name: Visual Testing
-        needs: deploy
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
-            - name: Install dependencies
-              run: bun install --frozen-lockfile
-            - name: Setup Playwright
-              uses: ./.github/actions/setup-playwright
-            - name: Run Playwright tests
-              run: bun e2e
-              env:
-                  BASE_URL: ${{needs.deploy.outputs.deployment_url}}
-                  ARGOS_TOKEN: ${{ secrets.ARGOS_TOKEN }}
-    pagespeed-testing:
-        runs-on: ubuntu-latest
-        name: PageSpeed Testing
-        needs: deploy
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
-            - name: Install dependencies
-              run: bun install --frozen-lockfile
-              env:
-                  PUPPETEER_SKIP_DOWNLOAD: 1
-            - name: Run pagespeed tests
-              run: bun ./packages/gitbook/tests/pagespeed-testing.ts $DEPLOYMENT_URL
-              env:
-                  DEPLOYMENT_URL: ${{needs.deploy.outputs.deployment_url}}
-                  PAGESPEED_API_KEY: ${{ secrets.PAGESPEED_API_KEY }}
     format:
         runs-on: ubuntu-latest
         name: Format
+        timeout-minutes: 6
         steps:
             - name: Checkout
               uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
             - name: Install dependencies
               run: bun install --frozen-lockfile
               env:
@@ -130,43 +23,54 @@ jobs:
     lint:
         runs-on: ubuntu-latest
         name: Lint
+        timeout-minutes: 6
         steps:
             - name: Checkout
               uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
             - name: Install dependencies
               run: bun install --frozen-lockfile
               env:
                   PUPPETEER_SKIP_DOWNLOAD: 1
-            - run: bun lint --no-cache
+            - run: bun lint
     test:
         runs-on: ubuntu-latest
         name: Test
+        timeout-minutes: 6
         steps:
             - name: Checkout
               uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
             - name: Install dependencies
               run: bun install --frozen-lockfile
               env:
                   PUPPETEER_SKIP_DOWNLOAD: 1
             - run: bun unit
-    typecheck:
+    build:
         runs-on: ubuntu-latest
-        name: Typecheck
+        name: Build
+        timeout-minutes: 6
         steps:
             - name: Checkout
               uses: actions/checkout@v4
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
-              with:
-                  bun-version: 1.1.18
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - run: bun run build
+    typecheck:
+        runs-on: ubuntu-latest
+        name: Typecheck
+        timeout-minutes: 6
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
             - name: Install dependencies
               run: bun install --frozen-lockfile
               env:

.github/workflows/css-browser-compatibility.yaml

@@ -0,0 +1,34 @@
+name: CSS browser compatibility
+
+on:
+    pull_request_target:
+        types: [opened, reopened, synchronize]
+
+permissions:
+    contents: read
+    pull-requests: read
+
+concurrency:
+    group: css-browser-compatibility-${{ github.event.pull_request.number }}
+    cancel-in-progress: true
+
+jobs:
+    check:
+        name: Check newly added CSS declarations
+        runs-on: ubuntu-latest
+        timeout-minutes: 6
+        steps:
+            # pull_request_target checks out the trusted base branch by default. Never use the PR ref here.
+            - name: Checkout trusted checker
+              uses: actions/checkout@v4
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install --frozen-lockfile
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - name: Check CSS browser compatibility
+              working-directory: packages/gitbook
+              run: bun run check:css-browser-compatibility
+              env:
+                  GITHUB_TOKEN: ${{ github.token }}

.github/workflows/deploy-preview.yaml

@@ -0,0 +1,301 @@
+name: Preview
+on:
+    pull_request_target:
+    push:
+        branches:
+            - main
+jobs:
+    approval:
+        # Ensure that external contributors' PRs are manually approved before deployment
+        name: Approve Preview Deployment
+        runs-on: ubuntu-latest
+        if: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.fork }}
+        environment:
+            name: preview-approval
+        steps:
+            - name: Approval gate
+              run: echo "Preview deployment approved."
+    deploy-v2-vercel:
+        name: Deploy v2 to Vercel (preview)
+        runs-on: ubuntu-latest
+        needs: approval
+        if: ${{ always() && (needs.approval.result == 'success' || needs.approval.result == 'skipped') }}
+        environment:
+            name: 2v-preview
+            url: ${{ steps.deploy.outputs.deployment-url }}
+        outputs:
+            deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Deploy to Vercel
+              id: deploy
+              uses: ./.github/composite/deploy-vercel
+              with:
+                  environment: preview
+                  vercelOrg: ${{ secrets.VERCEL_ORG_ID }}
+                  vercelProject: ${{ secrets.VERCEL_PROJECT_ID }}
+                  vercelToken: ${{ secrets.VERCEL_TOKEN }}
+                  opItem: op://gitbook-open/2v-preview
+                  opServiceAccount: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
+                  headSha: ${{ github.event.pull_request.head.sha || github.sha }}
+    deploy-v2-cloudflare:
+        name: Deploy v2 to Cloudflare Worker (preview)
+        runs-on: ubuntu-latest
+        needs: approval
+        if: ${{ always() && (needs.approval.result == 'success' || needs.approval.result == 'skipped') }}
+        environment:
+            name: 2c-preview
+            url: ${{ steps.deploy.outputs.deployment-url }}
+        outputs:
+            deployment-url: ${{ steps.deploy.outputs.deployment-url || steps.extract-worker-id.outputs.worker-url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Deploy to Cloudflare
+              id: deploy
+              uses: ./.github/composite/deploy-cloudflare
+              with:
+                  environment: preview
+                  deploy: ${{ github.ref == 'refs/heads/main' }}
+                  apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+                  accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+                  opItem: op://gitbook-open/2c-preview
+                  opServiceAccount: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
+                  commitTag: ${{ github.ref == 'refs/heads/main' && 'main' || format('pr{0}', github.event.pull_request.number) }}
+                  commitMessage: ${{ github.sha }}
+                  headSha: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Extract Worker ID
+              id: extract-worker-id
+              if: ${{ !steps.deploy.outputs.deployment-url }}
+              run: |
+                  if [[ "${{ steps.deploy.outputs.command-output }}" =~ Worker\ Version\ ID:\ ([0-9a-f]{8})-([0-9a-f-]+) ]]; then
+                    WORKER_ID_FIRST_PART="${BASH_REMATCH[1]}"
+                    echo "worker-url=https://${WORKER_ID_FIRST_PART}-gitbook-open-v2-preview.gitbook.workers.dev/" >> $GITHUB_OUTPUT
+                  fi
+            - name: Outputs
+              run: |
+                  echo "URL: ${{ steps.deploy.outputs.deployment-url || steps.extract-worker-id.outputs.worker-url }}"
+    comment-deployments:
+        runs-on: ubuntu-latest
+        name: Comment Deployments (preview)
+        if: always() && github.event_name != 'push'
+        needs:
+            - deploy-v2-vercel
+            - deploy-v2-cloudflare
+        steps:
+            - name: Find GitHub Comment
+              uses: peter-evans/find-comment@v3
+              id: fc
+              with:
+                  issue-number: ${{ github.event.pull_request.number }}
+                  comment-author: 'github-actions[bot]'
+                  body-includes: 'Summary of the deployments'
+
+            - name: Create or update GitHub comment
+              uses: peter-evans/create-or-update-comment@v4
+              with:
+                  comment-id: ${{ steps.fc.outputs.comment-id }}
+                  issue-number: ${{ github.event.pull_request.number }}
+                  body: |
+                      Summary of the deployments:
+
+                      | Version | URL | Status |
+                      | --- | --- | --- |
+                      | Vercel | [${{ needs.deploy-v2-vercel.outputs.deployment-url }}](${{ needs.deploy-v2-vercel.outputs.deployment-url }}) | ${{ needs.deploy-v2-vercel.result == 'success' && '✅' || '❌' }} |
+                      | Cloudflare | [${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}](${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}) | ${{ needs.deploy-v2-cloudflare.result == 'success' && '✅' || '❌' }} |
+
+                      ### Test content
+
+                      | Site | `2v` | `2c` |
+                      | --- | --- | --- |
+                      | GitBook | [${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/gitbook.com/docs](${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/gitbook.com/docs) | [${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/gitbook.com/docs](${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/gitbook.com/docs) |
+                      | E2E | [${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/gitbook.gitbook.io/test-gitbook-open](${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/gitbook.gitbook.io/test-gitbook-open) | [${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/gitbook.gitbook.io/test-gitbook-open](${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/gitbook.gitbook.io/test-gitbook-open) |
+                  edit-mode: replace
+    visual-testing-v2-vercel:
+        runs-on: ubuntu-latest
+        name: Visual Testing v2
+        needs: deploy-v2-vercel
+        if: ${{ always() && needs.deploy-v2-vercel.result == 'success' }}
+        timeout-minutes: 15
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install --frozen-lockfile
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - name: Run Playwright tests
+              run: bun e2e
+              env:
+                  BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}
+                  SITE_BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/
+                  ARGOS_TOKEN: ${{ secrets.ARGOS_TOKEN }}
+                  ARGOS_BUILD_NAME: v2-vercel
+    visual-testing-v2-cloudflare:
+        runs-on: ubuntu-latest
+        name: Visual Testing v2 (Cloudflare)
+        needs: deploy-v2-cloudflare
+        if: ${{ always() && needs.deploy-v2-cloudflare.result == 'success' }}
+        timeout-minutes: 15
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install --frozen-lockfile
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - name: Run Playwright tests
+              run: bun e2e
+              env:
+                  BASE_URL: ${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}
+                  SITE_BASE_URL: ${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/
+                  ARGOS_TOKEN: ${{ secrets.ARGOS_TOKEN }}
+                  ARGOS_BUILD_NAME: v2-cloudflare
+    visual-testing-customers-v2:
+        runs-on: ubuntu-latest
+        name: Visual Testing Customers v2
+        needs: deploy-v2-vercel
+        if: ${{ always() && needs.deploy-v2-vercel.result == 'success' }}
+        timeout-minutes: 30
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install --frozen-lockfile
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - name: Run Playwright tests
+              run: bun e2e-customers
+              env:
+                  BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}
+                  SITE_BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/
+                  ARGOS_TOKEN: ${{ secrets.ARGOS_TOKEN }}
+                  ARGOS_BUILD_NAME: customers-v2-vercel
+
+            # Style recalc depends on the client bundle, not the host, so this runs here only and
+            # not in the Cloudflare job. Kept out of `e2e-customers`, which is a visual suite.
+            - name: Run style invalidation tests
+              if: always()
+              working-directory: packages/gitbook
+              run: bun run e2e-style-perf
+              env:
+                  BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}
+                  SITE_BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/
+
+            # Runs on failure too: a blown style budget is exactly when the numbers are worth seeing.
+            - name: Build style invalidation report
+              if: always() && github.event_name != 'push'
+              id: style-perf
+              working-directory: packages/gitbook
+              run: |
+                  rows=$(cat test-results/style-perf.md 2>/dev/null || true)
+                  if [ -z "$rows" ]; then exit 0; fi
+                  {
+                    echo 'body<<STYLE_PERF_EOF'
+                    echo '### Style invalidation on a large API reference'
+                    echo
+                    echo 'Elements restyled by opening one popup on [the Snyk API reference](https://docs.snyk.io/snyk-api/reference/apps). A share near or above 100% means the insertion restyles the whole document.'
+                    echo
+                    echo '| interaction | restyled | page | share | budget | |'
+                    echo '| --- | ---: | ---: | ---: | ---: | :-: |'
+                    echo "$rows"
+                    echo 'STYLE_PERF_EOF'
+                  } >> "$GITHUB_OUTPUT"
+
+            - name: Find style invalidation comment
+              if: always() && github.event_name != 'push' && steps.style-perf.outputs.body != ''
+              uses: peter-evans/find-comment@v3
+              id: fc-style-perf
+              with:
+                  issue-number: ${{ github.event.pull_request.number }}
+                  comment-author: 'github-actions[bot]'
+                  body-includes: 'Style invalidation on a large API reference'
+
+            - name: Create or update style invalidation comment
+              if: always() && github.event_name != 'push' && steps.style-perf.outputs.body != ''
+              uses: peter-evans/create-or-update-comment@v4
+              with:
+                  comment-id: ${{ steps.fc-style-perf.outputs.comment-id }}
+                  issue-number: ${{ github.event.pull_request.number }}
+                  body: ${{ steps.style-perf.outputs.body }}
+                  edit-mode: replace
+    visual-testing-customers-v2-cloudflare:
+        runs-on: ubuntu-latest
+        name: Visual Testing Customers v2 (Cloudflare)
+        needs: deploy-v2-cloudflare
+        if: ${{ always() && needs.deploy-v2-cloudflare.result == 'success' }}
+        timeout-minutes: 30
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install --frozen-lockfile
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - name: Run Playwright tests
+              run: bun e2e-customers
+              env:
+                  BASE_URL: ${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}
+                  SITE_BASE_URL: ${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/
+                  ARGOS_TOKEN: ${{ secrets.ARGOS_TOKEN }}
+                  ARGOS_BUILD_NAME: customers-v2-cloudflare
+    browserless-testing-v2-vercel:
+        runs-on: ubuntu-latest
+        name: Browserless Testing v2 (Vercel)
+        needs: deploy-v2-vercel
+        if: ${{ always() && needs.deploy-v2-vercel.result == 'success' }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+              with:
+                  ref: ${{ github.event.pull_request.head.sha || github.sha }}
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
+            - name: Install dependencies
+              run: bun install --frozen-lockfile
+              env:
+                  PUPPETEER_SKIP_DOWNLOAD: 1
+            - name: Run tests
+              run: cd ./packages/gitbook && bun e2e-browserless
+              env:
+                  BASE_URL: ${{needs.deploy-v2-vercel.outputs.deployment-url}}
+                  SITE_BASE_URL: ${{ needs.deploy-v2-vercel.outputs.deployment-url }}/url/
+    # browserless-testing-v2-cloudflare:
+    #     runs-on: ubuntu-latest
+    #     name: Browserless Testing v2 (Cloudflare)
+    #     needs: deploy-v2-cloudflare
+    #     steps:
+    #         - name: Checkout
+    #           uses: actions/checkout@v4
+    #         - name: Setup Bun
+    #           uses: ./.github/composite/setup-bun
+    #         - name: Install dependencies
+    #           run: bun install --frozen-lockfile
+    #           env:
+    #               PUPPETEER_SKIP_DOWNLOAD: 1
+    #         - name: Run tests
+    #           run: cd ./packages/gitbook && bun e2e-browserless
+    #           env:
+    #               BASE_URL: ${{needs.deploy-v2-cloudflare.outputs.deployment-url}}
+    #               SITE_BASE_URL: ${{ needs.deploy-v2-cloudflare.outputs.deployment-url }}/url/

.github/workflows/deploy-production.yaml

@@ -0,0 +1,53 @@
+name: Production
+on:
+    push:
+        branches:
+            - main
+jobs:
+    deploy-v2-vercel:
+        name: Deploy v2 to Vercel (production)
+        runs-on: ubuntu-latest
+        environment:
+            name: 2v-production
+            url: ${{ steps.deploy.outputs.deployment-url }}
+        outputs:
+            deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Deploy
+              id: deploy
+              uses: ./.github/composite/deploy-vercel
+              with:
+                  environment: production
+                  vercelOrg: ${{ secrets.VERCEL_ORG_ID }}
+                  vercelProject: ${{ secrets.VERCEL_PROJECT_ID }}
+                  vercelToken: ${{ secrets.VERCEL_TOKEN }}
+                  opItem: op://gitbook-open/2v-production
+                  opServiceAccount: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
+    deploy-v2-cloudflare:
+        name: Deploy v2 to Cloudflare Worker (production)
+        runs-on: ubuntu-latest
+        environment:
+            name: 2c-production
+            url: ${{ steps.deploy.outputs.deployment-url }}
+        outputs:
+            deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Deploy
+              id: deploy
+              uses: ./.github/composite/deploy-cloudflare
+              with:
+                  environment: production
+                  deploy: true
+                  apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+                  accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+                  opItem: op://gitbook-open/2c-production
+                  opServiceAccount: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
+                  commitTag: main
+                  commitMessage: ${{ github.sha }}
+            - name: Outputs
+              run: |
+                  echo "URL: ${{ steps.deploy.outputs.deployment-url }}"

.github/workflows/deploy-staging.yaml

@@ -0,0 +1,53 @@
+name: Staging
+on:
+    push:
+        branches:
+            - main
+jobs:
+    deploy-v2-vercel:
+        name: Deploy v2 to Vercel (staging)
+        runs-on: ubuntu-latest
+        environment:
+            name: 2v-staging
+            url: ${{ steps.deploy.outputs.deployment-url }}
+        outputs:
+            deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Deploy
+              id: deploy
+              uses: ./.github/composite/deploy-vercel
+              with:
+                  environment: staging
+                  vercelOrg: ${{ secrets.VERCEL_ORG_ID }}
+                  vercelProject: ${{ secrets.VERCEL_PROJECT_ID }}
+                  vercelToken: ${{ secrets.VERCEL_TOKEN }}
+                  opItem: op://gitbook-open/2v-staging
+                  opServiceAccount: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
+    deploy-v2-cloudflare:
+        name: Deploy v2 to Cloudflare Worker (staging)
+        runs-on: ubuntu-latest
+        environment:
+            name: 2c-staging
+            url: ${{ steps.deploy.outputs.deployment-url }}
+        outputs:
+            deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Deploy
+              id: deploy
+              uses: ./.github/composite/deploy-cloudflare
+              with:
+                  environment: staging
+                  deploy: true
+                  apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+                  accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+                  opItem: op://gitbook-open/2c-staging
+                  opServiceAccount: ${{ secrets.OP_SERVICE_ACCOUNT_TOKEN }}
+                  commitTag: main
+                  commitMessage: ${{ github.sha }}
+            - name: Outputs
+              run: |
+                  echo "URL: ${{ steps.deploy.outputs.deployment-url }}"

.github/workflows/publish.yaml

@@ -11,27 +11,42 @@ jobs:
     publish:
         name: Publish
         runs-on: ubuntu-latest
+        permissions:
+            id-token: write
+            pull-requests: write
+            contents: write
+        env:
+            # The repo is managed by Bun, but publishing uses npm for provenance.
+            # Keep Corepack from rejecting packageManager: bun@... when npm runs.
+            COREPACK_ENABLE_PROJECT_SPEC: 0
         steps:
             - name: Checkout Repo
               uses: actions/checkout@v3
               with:
                   # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
                   fetch-depth: 0
-            - name: Setup bun
-              uses: oven-sh/setup-bun@v1
+            - name: Setup Node
+              uses: actions/setup-node@v4
               with:
-                  bun-version: 1.1.18
+                  node-version: 22
+                  registry-url: 'https://registry.npmjs.org'
+            - name: Update npm
+              run: |
+                  corepack enable npm
+                  corepack install -g npm@latest
+            - name: Setup Bun
+              uses: ./.github/composite/setup-bun
             - name: Install dependencies
               run: bun install --frozen-lockfile
               env:
                   PUPPETEER_SKIP_DOWNLOAD: 1
-            - name: Create Release Pull Request or Publish to npm
+            - name: Create Release Pull Request
               id: changesets
               uses: changesets/action@v1
               with:
-                  publish: npm run release
+                  publish: bun run publish-all-packages
+                  version: bun run changeset-version
               env:
                   # Using a PAT instead of GITHUB_TOKEN because we need to run workflows when releases are created
                   # https://github.com/orgs/community/discussions/26875#discussioncomment-3253761
                   GITHUB_TOKEN: ${{ secrets.GH_PERSONAL_TOKEN }}
-                  NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.gitignore

@@ -20,3 +20,12 @@ yarn-error.log*
 # Vercel
 .vercel
 
+# Env files
+.env.local
+
+# TypeScript
+*.tsbuildinfo
+.npmrc
+
+# Bun pack artifacts
+packages/*/*.tgz

.nvmrc

@@ -0,0 +1 @@
+v22.3

.oxfmtrc.json

@@ -0,0 +1,70 @@
+{
+    "$schema": "./node_modules/oxfmt/configuration_schema.json",
+    "printWidth": 100,
+    "tabWidth": 4,
+    "useTabs": false,
+    "semi": true,
+    "singleQuote": true,
+    "jsxSingleQuote": false,
+    "quoteProps": "as-needed",
+    "trailingComma": "es5",
+    "bracketSpacing": true,
+    "bracketSameLine": false,
+    "arrowParens": "always",
+    "endOfLine": "lf",
+    "sortImports": {
+        "customGroups": [
+            {
+                "groupName": "workspace",
+                "elementNamePattern": ["@gitbook/**"]
+            }
+        ],
+        "groups": [
+            ["value-builtin", "value-external", "type-builtin", "type-external"],
+            { "newlinesBetween": true },
+            "workspace",
+            { "newlinesBetween": true },
+            [
+                "value-internal",
+                "type-internal",
+                "value-parent",
+                "type-parent",
+                "value-sibling",
+                "type-sibling",
+                "value-index",
+                "type-index"
+            ],
+            "type-import",
+            "unknown"
+        ]
+    },
+    "sortPackageJson": false,
+    "sortTailwindcss": {
+        "config": "./packages/gitbook/tailwind.config.ts",
+        "attributes": ["class", "className", "style"],
+        "functions": ["clsx", "tw"]
+    },
+    "ignorePatterns": [
+        "**/node_modules/**",
+        "**/dist/**",
+        "**/build/**",
+        "**/public/**",
+        "**/.next/**",
+        "**/.open-next/**",
+        "**/.turbo/**",
+        "**/.vercel/**",
+        "**/.cache/**",
+        "**/.wrangler/**",
+        "**/*.log",
+        "**/*.MD",
+        "**/*.md",
+        "**/*.mdx",
+        "**/*.html",
+        "**/*.css",
+        "packages/embed/standalone/**",
+        "packages/openapi-parser/src/fixtures/**",
+        "packages/emoji-codepoints/index.ts",
+        "packages/icons/src/data/*.json",
+        "packages/gitbook/worker-configuration.d.ts"
+    ]
+}

.oxlintrc.json

@@ -0,0 +1,87 @@
+{
+    "$schema": "./node_modules/oxlint/configuration_schema.json",
+    "categories": {
+        "correctness": "warn",
+        "suspicious": "warn",
+        "perf": "warn"
+    },
+    "plugins": ["eslint", "typescript", "unicorn", "oxc", "react", "jsx-a11y", "vitest"],
+    "env": {
+        "builtin": true,
+        "browser": true,
+        "node": true,
+        "shared-node-browser": true,
+        "worker": true
+    },
+    "globals": {
+        "Bun": "readonly",
+        "GitBookIntegrationEvent": "readonly",
+        "React": "readonly"
+    },
+    "rules": {
+        "eslint/no-console": [
+            "warn",
+            {
+                "allow": ["assert", "error", "warn"]
+            }
+        ],
+        "eslint/no-control-regex": "warn",
+        "eslint/no-prototype-builtins": "warn",
+        "eslint/no-cond-assign": "warn",
+        "eslint/no-undef": "error",
+        "eslint/no-unused-vars": [
+            "error",
+            {
+                "argsIgnorePattern": "^_",
+                "caughtErrorsIgnorePattern": "^_",
+                "ignoreRestSiblings": true,
+                "varsIgnorePattern": "^_"
+            }
+        ],
+        "react/button-has-type": "warn",
+        "react/exhaustive-deps": "warn",
+        "react/jsx-key": "warn",
+        "react/jsx-no-useless-fragment": "warn",
+        "react/no-array-index-key": "warn",
+        "react/void-dom-elements-no-children": "warn",
+        "react/rules-of-hooks": "error",
+        "jsx-a11y/alt-text": "warn",
+        "jsx-a11y/anchor-is-valid": "warn",
+        "jsx-a11y/click-events-have-key-events": "warn",
+        "jsx-a11y/iframe-has-title": "warn",
+        "jsx-a11y/interactive-supports-focus": "warn",
+        "jsx-a11y/label-has-associated-control": "warn",
+        "jsx-a11y/no-noninteractive-tabindex": "warn",
+        "jsx-a11y/role-has-required-aria-props": "warn",
+        "jsx-a11y/tabindex-no-positive": "warn",
+        "typescript/array-type": "error",
+        "typescript/no-explicit-any": "warn",
+        "typescript/no-non-null-assertion": "warn",
+        "typescript/no-confusing-void-expression": "warn",
+        "typescript/only-throw-error": "error",
+        "vitest/no-focused-tests": "error",
+        "no-delete-var": "warn",
+        "no-debugger": "error",
+        "no-throw-literal": "error",
+        "use-isnan": "error",
+        "valid-typeof": "error"
+    },
+    "ignorePatterns": [
+        "**/node_modules/**",
+        "**/dist/**",
+        "**/build/**",
+        "**/public/**",
+        "**/.next/**",
+        "**/.open-next/**",
+        "**/.turbo/**",
+        "**/.vercel/**",
+        "**/.cache/**",
+        "**/.wrangler/**",
+        "packages/embed/standalone/**",
+        "packages/openapi-parser/src/fixtures/**",
+        "packages/emoji-codepoints/index.ts",
+        "packages/icons/src/data/*.json",
+        "packages/gitbook/worker-configuration.d.ts",
+        "**/*.css"
+    ]
+}

.prettierignore

@@ -1,6 +0,0 @@
-.next
-.vercel
-
-# Generated
-packages/emoji-codepoints/index.ts
-packages/gitbook/public/~gitbook/static/

.prettierrc.json

@@ -1,5 +0,0 @@
-{
-    "printWidth": 100,
-    "singleQuote": true,
-    "tabWidth": 4
-}

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+    "recommendations": ["oxc.oxc-vscode"]
+}

.vscode/settings.json

@@ -7,5 +7,13 @@
         ["style \\=([^;]*);", "\"([^\"]*)\""],
         ["style \\=([^;]*);", "\\`([^\\`]*)\\`"]
     ],
-    "tailwindCSS.classAttributes": ["class", "className", "style", ".*Style"]
+    "tailwindCSS.classAttributes": ["class", "className", "style", ".*Style"],
+    "editor.formatOnSave": true,
+    "editor.defaultFormatter": "oxc.oxc-vscode",
+    "editor.codeActionsOnSave": {
+        "source.fixAll.oxc": "always"
+    },
+    "[typescript]": {
+        "editor.defaultFormatter": "oxc.oxc-vscode"
+    }
 }

AGENTS.md

@@ -0,0 +1,82 @@
+# AGENTS Instructions
+
+## Commands
+
+```bash
+bun install          # Install dependencies
+bun dev              # Start dev server (all packages)
+bun run build        # Build all packages
+bun run lint         # Lint with Oxlint
+bun run format       # Format with Oxfmt (run after every change)
+bun run typecheck    # Type-check all packages
+bun run unit         # Run unit tests
+```
+
+## Development
+
+The dev server proxies published GitBook sites locally. After `bun dev`, access any published site at:
+
+```
+http://localhost:3000/url/<published-gitbook-url>
+```
+
+Examples:
+- `http://localhost:3000/url/gitbook.com/docs`
+- `http://localhost:3000/url/open-source.gitbook.io/midjourney`
+
+## Architecture
+
+```
+packages/
+  gitbook/          # Main Next.js app
+    src/
+      app/          # Next.js App Router (sites/)
+      components/   # React components
+      lib/          # Server utilities, data fetching
+      intl/         # Internationalization (translations/)
+  openapi-parser/   # OpenAPI 3.0/3.1/Swagger parser
+  react-openapi/    # OpenAPI rendering components
+  react-contentkit/ # ContentKit component rendering
+  embed/            # Embeddable GitBook components
+  shared/           # Shared utilities
+  icons/            # Icon assets
+  fonts/            # Font assets
+  colors/           # Color tokens
+  expr/             # GitBook expression evaluator
+  cache-do/         # Cloudflare DO cache
+  cache-tags/       # Cache tag utilities
+```
+
+## Testing
+
+```bash
+bun run unit         # Unit tests via bun test (not vitest)
+bun run e2e          # Playwright e2e tests (requires built app)
+```
+
+Run a specific test file:
+```bash
+cd packages/gitbook && bun test src/lib/cache.test.ts
+```
+
+## Changesets
+
+After committing code changes, create a changeset for the affected package:
+
+```md
+---
+"gitbook": patch
+---
+
+Provide a short description of the change.
+```
+
+Save as `.changeset/<name>.md`, then commit it separately with message: `changeset`
+
+## Formatting
+
+Linting uses Oxlint and formatting uses Oxfmt. Always run `bun run format` before committing.
+
+## Comments
+
+Comment to explain *why*, not *what* — the code already shows what it does. Keep comments short, ideally a single line. Avoid multi-line block comments that narrate mechanics a reader can follow from the code; they add noise and go stale. Reserve longer comments for genuinely non-obvious rationale: a subtle invariant, or a workaround and the reason it exists.

CLAUDE.md

@@ -0,0 +1 @@
+@AGENTS.md

README.md

@@ -1,11 +1,15 @@
+<p align="center">
+  <img src="./assets/gitbook_icon_dark.svg" alt="GitBook" width="48" />
+</p>
+
 <h1 align="center">GitBook</h1>
 
 <p align="center">
-  <a href="https://docs.gitbook.com/">Docs</a> - <a href="https://github.com/GitbookIO/community">Community</a> - <a href="https://developer.gitbook.com/">Developer Docs</a> - <a href="https://changelog.gitbook.com/">Changelog</a> - <a href="https://github.com/GitbookIO/gitbook/issues/new?assignees=&labels=bug&template=bug_report.md">Bug reports</a> 
+  <a href="https://gitbook.com/docs/">Docs</a> - <a href="https://github.com/GitbookIO/community">Community</a> - <a href="https://developer.gitbook.com/">Developer Docs</a> - <a href="https://changelog.gitbook.com/">Changelog</a> - <a href="https://github.com/GitbookIO/gitbook/issues/new?assignees=&labels=bug&template=bug_report.md">Bug reports</a> - <a href="https://github.com/orgs/GitbookIO/discussions/categories/feature-requests">Feature requests</a> 
 </p>
 
 <p align="center">
-  <a href="https://gitbook.com"><img src="https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=data:image/svg%2bxml;base64,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&labelColor=5c5c5c&color=3F89A1&label=%20" alt="Documented on GitBook"></a>
+  <a href="https://gitbook.com"><img src="https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=gitbook&logoColor=ffffff&label=%20&labelColor=5c5c5c&color=3F89A1"></a>
   <a href="#"><img src="https://img.shields.io/badge/Open_Source-❤️-FDA599?"/></a>
   <a href="/LICENSE"><img src="https://img.shields.io/badge/License-GNU_GPLv3-F4E28D"/></a>
   <a href="/.github/CONTRIBUTING.md"><img src="https://img.shields.io/github/contributors/gitbookIO/gitbook"/></a>
@@ -14,7 +18,7 @@
 
 <p align="center">Welcome to GitBook, the platform for managing technical knowledge for teams.</p>
 
-<p align="center">This repository contains the open-source code used to render GitBook's published content.</p>
+<p align="center">This repository contains the open source code used to render GitBook's published content.</p>
 
 <p align="center">
   <img alt="GitBook Open Published Site" src="./assets/published-site.png">
@@ -35,8 +39,10 @@ To run a local version of this project, please follow these simple steps.
 
 ### Prerequisites
 
--   Node.js (Version: >=18.x)
--   Bun
+- Node.js (Version: >= 22.3)
+    - Use nvm for easy Node management
+- [Bun](https://bun.sh/) (Version: >=1.2.15)
+  - We use a text-based lockfile which isn't supported below 1.2.15
 
 ### Set up
 
@@ -46,32 +52,40 @@ To run a local version of this project, please follow these simple steps.
 git clone https://github.com/gitbookIO/gitbook.git
 ```
 
-2. Install the project's dependencies through Bun.
+2. Ensure you are using the project's version of `node`. Running `nvm use` will change your local version to the correct one.
+
+3. Install the project's dependencies through Bun.
 
 ```
 bun install
 ```
 
-3. Start your local development server.
+4. Start your local development server.
 
 ```
 bun dev
 ```
 
-Then open the space in your web browser, using http://localhost:3000/<host>/<path> (example: http://localhost:3000/docs.gitbook.com).
+6. Open a published GitBook space in your web browser, prefixing it with `http://localhost:3000/url`.
 
-### Other development commands
+examples:
 
--   `bun format`: format the code
--   `bun lint`: lint the code
+-   http://localhost:3000/url/gitbook.com/docs
+-   http://localhost:3000/url/open-source.gitbook.io/midjourney
+
+Any published GitBook site can be accessed through your local development instance, and any updates you make to the codebase will be reflected in your browser.
 
 ### CI and testing
 
 All pull-requests will be tested against both visual and performances testing to prevent regressions.
 
+## Fonts and Icons
+
+GitBook Open uses fontawesome. For self-hosting and local development, for licensing reasons, only the icons from the free version should be used.
+
 ## Contributing
 
-GitBook's rendering engine is fully open-source and built on top of [Next.js](https://nextjs.org/). Head to our [contributing guide](https://github.com/GitbookIO/gitbook/.github/CONTRIBUTING.md) to learn more about the workflow on adding your first Pull Request.
+GitBook's rendering engine is fully open source and built on top of [Next.js](https://nextjs.org/). Head to our [contributing guide](https://github.com/GitbookIO/gitbook/blob/main/.github/CONTRIBUTING.md) to learn more about the workflow on adding your first Pull Request.
 
 ### Types of contributions
 
@@ -79,7 +93,7 @@ We encourage you to contribute to GitBook to help us build the best tool for doc
 
 #### Translations
 
-The GitBook UI is rendered using a set of translation files found in [`src/intl/translations`](/src/intl/translations/). We welcome all additional translations for the UI.
+The GitBook UI is rendered using a set of translation files found in [`packages/gitbook/src/intl/translations`](/packages/gitbook/src/intl/translations/). We welcome all additional translations for the UI.
 
 #### Bugs
 
@@ -90,7 +104,7 @@ Encounter a bug or find an issue you'd like to fix? Helping us fix issues relate
 > [!WARNING]  
 > While it is possible to self-host this project, we do not recommend this unless you are certain this option fits your need.
 >
-> _Looking to add a specific feature in GitBook? Head to our [contributing guide](/.github/CONTRIBUTING.md) to get started._
+> _Looking to add a specific feature in GitBook? Head to our [contributing guide](https://github.com/GitbookIO/gitbook/blob/main/.github/CONTRIBUTING.md) to get started._
 >
 > Self-hosting this project puts the responsibility of maintaining and merging future updates on **you**. We cannot guarantee support, maintenance, or updates to forked and self-hosted instances of this project.
 >
@@ -106,10 +120,30 @@ On the con side, you become responsible for the reliability of your published si
 
 Distributed under the [GNU GPLv3 License](https://github.com/GitBookIO/gitbook/blob/main/LICENSE).
 
-If you plan to distribute the code, you must the source code public to comply with GNU GPLv3. To clone in a private repository, acquire a [commercial license](https://www.gitbook.com/pricing).
+If you plan to distribute the code, you must make the source code public to comply with the GNU GPLv3. To clone in a private repository, acquire a [commercial license](https://www.gitbook.com/pricing).
 
 See `LICENSE` for more information.
 
+## Badges
+
+<p align="left">
+  <a href="https://gitbook.com"><img src="https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=gitbook&logoColor=ffffff&label=%20&labelColor=5c5c5c&color=3F89A1"></a>
+  <a href="https://gitbook.com"><img src="https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=gitbook&logoColor=ffffff&label=%20&labelColor=5c5c5c&color=F4E28D"></a>
+  <a href="https://gitbook.com"><img src="https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=gitbook&logoColor=ffffff&label=%20&labelColor=5c5c5c&color=FDA599"></a>
+</p>
+
+```md
+[![GitBook](https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=gitbook&logoColor=ffffff&label=%20&labelColor=5c5c5c&color=3F89A1)](https://www.gitbook.com/preview?utm_source=gitbook_readme_badge&utm_medium=organic&utm_campaign=preview_documentation&utm_content=link)
+```
+
+```html
+<a href="https://www.gitbook.com/preview?utm_source=gitbook_readme_badge&utm_medium=organic&utm_campaign=preview_documentation&utm_content=link">
+    <img
+        src="https://img.shields.io/static/v1?message=Documented%20on%20GitBook&logo=gitbook&logoColor=ffffff&label=%20&labelColor=5c5c5c&color=3F89A1"
+    />
+</a>
+```
+
 ## Acknowledgements
 
 GitBook wouldn't be possible without these projects:

assets/gitbook_icon_dark.svg

@@ -0,0 +1,3 @@
+<svg width="65" height="65" viewBox="0 0 65 65" fill="none" xmlns="http://www.w3.org/2000/svg">
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