ci: skip draft PR builds until ready

.github/workflows/comment-pr-artifacts.yml

@@ -6,6 +6,7 @@ on:
       - opened
       - synchronize
       - reopened
+      - ready_for_review
 
 permissions:
   actions: read
@@ -20,6 +21,7 @@ jobs:
       ALLOWED_ACTORS: ${{ vars.ALLOWED_NON_DEV_PR_ACTORS }}
       ACTOR: ${{ github.actor }}
       BASE_REF: ${{ github.event.pull_request.base.ref }}
+      IS_DRAFT: ${{ github.event.pull_request.draft }}
       PR_NUMBER: ${{ github.event.pull_request.number }}
       HEAD_SHA: ${{ github.event.pull_request.head.sha }}
       RETENTION_DAYS: 7
@@ -42,7 +44,7 @@ jobs:
           fi
 
       - name: Wait for PR build and comment
-        if: ${{ steps.auth.outputs.allowed == 'true' }}
+        if: ${{ steps.auth.outputs.allowed == 'true' && env.IS_DRAFT != 'true' }}
         uses: actions/github-script@v8
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pr-build.yml

@@ -6,6 +6,7 @@ on:
       - opened
       - synchronize
       - reopened
+      - ready_for_review
 
 permissions:
   contents: read
@@ -45,7 +46,7 @@ jobs:
 
   build:
     needs: authorize
-    if: ${{ needs.authorize.outputs.allowed == 'true' }}
+    if: ${{ needs.authorize.outputs.allowed == 'true' && !github.event.pull_request.draft }}
     uses: ./.github/workflows/build-and-upload.yml
     with:
       ref: ${{ github.event.pull_request.head.sha }}

packages/ui/src/App.tsx

@@ -11,10 +11,8 @@ import InstanceDisconnectedModal from "./components/instance-disconnected-modal"
 import InstanceShell from "./components/instance/instance-shell2"
 import { SettingsScreen } from "./components/settings-screen"
 import { InstanceMetadataProvider } from "./lib/contexts/instance-metadata-context"
-import { initMarkdown } from "./lib/markdown"
 import { initGithubStars } from "./stores/github-stars"
 
-import { useTheme } from "./lib/theme"
 import { useCommands } from "./lib/hooks/use-commands"
 import { useAppLifecycle } from "./lib/hooks/use-app-lifecycle"
 import { getLogger } from "./lib/logger"
@@ -59,7 +57,6 @@ import { openSettings } from "./stores/settings-screen"
 const log = getLogger("actions")
 
 const App: Component = () => {
-  const { isDark } = useTheme()
   const { t } = useI18n()
   const {
     preferences,
@@ -183,10 +180,6 @@ const App: Component = () => {
     }
   })
 
-  createEffect(() => {
-    void initMarkdown(isDark()).catch((error) => log.error("Failed to initialize markdown", error))
-  })
-
   createEffect(() => {
     initReleaseNotifications()
   })

packages/ui/src/components/code-block-inline.tsx

@@ -1,7 +1,8 @@
 import { createSignal, onMount, Show, createEffect } from "solid-js"
 import type { Highlighter } from "shiki/bundle/full"
 import { useTheme } from "../lib/theme"
-import { getSharedHighlighter, escapeHtml } from "../lib/markdown"
+import { getSharedHighlighter } from "../lib/markdown"
+import { escapeHtml } from "../lib/text-render-utils"
 import { copyToClipboard } from "../lib/clipboard"
 import { useI18n } from "../lib/i18n"
 

packages/ui/src/components/diff-viewer.tsx

@@ -1,9 +1,10 @@
 import { createMemo, Show, createEffect, onCleanup } from "solid-js"
 import { DiffView, DiffModeEnum } from "@git-diff-view/solid"
+import "@git-diff-view/solid/styles/diff-view-pure.css"
 import { disableCache } from "@git-diff-view/core"
 import type { DiffHighlighterLang } from "@git-diff-view/core"
 import { ErrorBoundary } from "solid-js"
-import { getLanguageFromPath } from "../lib/markdown"
+import { getLanguageFromPath } from "../lib/text-render-utils"
 import { normalizeDiffText } from "../lib/diff-utils"
 import { setCacheEntry } from "../lib/global-cache"
 import type { CacheEntryParams } from "../lib/global-cache"
@@ -134,4 +135,4 @@ export function ToolCallDiffViewer(props: ToolCallDiffViewerProps) {
       </Show>
     </div>
   )
-}
+}

packages/ui/src/components/instance/shell/right-panel/tabs/ChangesTab.tsx

@@ -1,11 +1,13 @@
-import { For, Show, createMemo, type Accessor, type Component, type JSX } from "solid-js"
-
-import { MonacoDiffViewer } from "../../../../file-viewer/monaco-diff-viewer"
+import { For, Show, Suspense, createMemo, lazy, type Accessor, type Component, type JSX } from "solid-js"
 
 import DiffToolbar from "../components/DiffToolbar"
 import SplitFilePanel from "../components/SplitFilePanel"
 import type { DiffContextMode, DiffViewMode, DiffWordWrapMode } from "../types"
 
+const LazyMonacoDiffViewer = lazy(() =>
+  import("../../../../file-viewer/monaco-diff-viewer").then((module) => ({ default: module.MonacoDiffViewer })),
+)
+
 interface ChangesTabProps {
   t: (key: string, vars?: Record<string, any>) => string
 
@@ -113,15 +115,23 @@ const ChangesTab: Component<ChangesTabProps> = (props) => {
             }
           >
             {(file) => (
-              <MonacoDiffViewer
-                scopeKey={scopeKey()}
-                path={String(file().file || "")}
-                before={String((file() as any).before || "")}
-                after={String((file() as any).after || "")}
-                viewMode={props.diffViewMode()}
-                contextMode={props.diffContextMode()}
-                wordWrap={props.diffWordWrapMode()}
-              />
+              <Suspense
+                fallback={
+                  <div class="file-viewer-empty">
+                    <span class="file-viewer-empty-text">{props.t("instanceInfo.loading")}</span>
+                  </div>
+                }
+              >
+                <LazyMonacoDiffViewer
+                  scopeKey={scopeKey()}
+                  path={String(file().file || "")}
+                  before={String((file() as any).before || "")}
+                  after={String((file() as any).after || "")}
+                  viewMode={props.diffViewMode()}
+                  contextMode={props.diffContextMode()}
+                  wordWrap={props.diffWordWrapMode()}
+                />
+              </Suspense>
             )}
           </Show>
         </div>
@@ -220,7 +230,7 @@ const ChangesTab: Component<ChangesTabProps> = (props) => {
         onResizeMouseDown={props.onResizeMouseDown}
         onResizeTouchStart={props.onResizeTouchStart}
         isPhoneLayout={props.isPhoneLayout()}
-        overlayAriaLabel="Changes"
+        overlayAriaLabel={props.t("instanceShell.rightPanel.tabs.changes")}
       />
     )
   }

packages/ui/src/components/instance/shell/right-panel/tabs/FilesTab.tsx

@@ -1,12 +1,14 @@
-import { For, Show, type Accessor, type Component, type JSX } from "solid-js"
+import { For, Show, Suspense, lazy, type Accessor, type Component, type JSX } from "solid-js"
 import type { FileNode } from "@opencode-ai/sdk/v2/client"
 
 import { RefreshCw } from "lucide-solid"
 
-import { MonacoFileViewer } from "../../../../file-viewer/monaco-file-viewer"
-
 import SplitFilePanel from "../components/SplitFilePanel"
 
+const LazyMonacoFileViewer = lazy(() =>
+  import("../../../../file-viewer/monaco-file-viewer").then((module) => ({ default: module.MonacoFileViewer })),
+)
+
 interface FilesTabProps {
   t: (key: string, vars?: Record<string, any>) => string
 
@@ -51,8 +53,8 @@ const FilesTab: Component<FilesTabProps> = (props) => {
     const headerDisplayedPath = () => props.browserSelectedPath() || props.browserPath()
 
     const emptyViewerMessage = () => {
-      if (props.browserLoading() && entriesValue === null) return "Loading files..."
-      return "Select a file to preview"
+      if (props.browserLoading() && entriesValue === null) return props.t("instanceInfo.loading")
+      return props.t("instanceShell.filesShell.viewerEmpty")
     }
 
     const renderViewer = () => (
@@ -77,7 +79,15 @@ const FilesTab: Component<FilesTabProps> = (props) => {
                     }
                   >
                     {(payload) => (
-                      <MonacoFileViewer scopeKey={props.scopeKey()} path={payload().path} content={payload().content} />
+                      <Suspense
+                        fallback={
+                          <div class="file-viewer-empty">
+                            <span class="file-viewer-empty-text">{props.t("instanceInfo.loading")}</span>
+                          </div>
+                        }
+                      >
+                        <LazyMonacoFileViewer scopeKey={props.scopeKey()} path={payload().path} content={payload().content} />
+                      </Suspense>
                     )}
                   </Show>
                 }
@@ -91,7 +101,7 @@ const FilesTab: Component<FilesTabProps> = (props) => {
             }
           >
             <div class="file-viewer-empty">
-              <span class="file-viewer-empty-text">Loading…</span>
+              <span class="file-viewer-empty-text">{props.t("instanceInfo.loading")}</span>
             </div>
           </Show>
         </div>
@@ -113,7 +123,7 @@ const FilesTab: Component<FilesTabProps> = (props) => {
         </Show>
 
         <Show when={props.browserLoading() && entriesValue === null}>
-          <div class="p-3 text-xs text-secondary">Loading files...</div>
+          <div class="p-3 text-xs text-secondary">{props.t("instanceInfo.loading")}</div>
         </Show>
 
         <For each={sorted}>
@@ -154,7 +164,7 @@ const FilesTab: Component<FilesTabProps> = (props) => {
                 </span>
               </span>
               <Show when={props.browserLoading()}>
-                <span>Loading…</span>
+                <span>{props.t("instanceInfo.loading")}</span>
               </Show>
               <Show when={props.browserError()}>{(err) => <span class="text-error">{err()}</span>}</Show>
             </div>
@@ -180,7 +190,7 @@ const FilesTab: Component<FilesTabProps> = (props) => {
         onResizeMouseDown={props.onResizeMouseDown}
         onResizeTouchStart={props.onResizeTouchStart}
         isPhoneLayout={props.isPhoneLayout()}
-        overlayAriaLabel="Files"
+        overlayAriaLabel={props.t("instanceShell.rightPanel.tabs.files")}
       />
     )
   }

packages/ui/src/components/instance/shell/right-panel/tabs/GitChangesTab.tsx

@@ -1,14 +1,16 @@
-import { For, Show, createMemo, type Accessor, type Component, type JSX } from "solid-js"
+import { For, Show, Suspense, createMemo, lazy, type Accessor, type Component, type JSX } from "solid-js"
 import type { File as GitFileStatus } from "@opencode-ai/sdk/v2/client"
 
 import { RefreshCw } from "lucide-solid"
 
-import { MonacoDiffViewer } from "../../../../file-viewer/monaco-diff-viewer"
-
 import DiffToolbar from "../components/DiffToolbar"
 import SplitFilePanel from "../components/SplitFilePanel"
 import type { DiffContextMode, DiffViewMode, DiffWordWrapMode } from "../types"
 
+const LazyMonacoDiffViewer = lazy(() =>
+  import("../../../../file-viewer/monaco-diff-viewer").then((module) => ({ default: module.MonacoDiffViewer })),
+)
+
 interface GitChangesTabProps {
   t: (key: string, vars?: Record<string, any>) => string
 
@@ -80,11 +82,11 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
   })
 
   const emptyViewerMessage = createMemo(() => {
-    if (!hasSession()) return "Select a session to view changes."
+    if (!hasSession()) return props.t("instanceShell.sessionChanges.noSessionSelected")
     const currentEntries = entries()
-    if (currentEntries === null) return "Loading git changes…"
-    if (nonDeleted().length === 0) return "No git changes yet."
-    return "No file selected."
+    if (currentEntries === null) return props.t("instanceShell.gitChanges.loading")
+    if (nonDeleted().length === 0) return props.t("instanceShell.gitChanges.empty")
+    return props.t("instanceShell.filesShell.viewerEmpty")
   })
 
   const renderContent = (): JSX.Element => {
@@ -122,7 +124,14 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
                     }
                   >
                     {(file) => (
-                        <MonacoDiffViewer
+                      <Suspense
+                        fallback={
+                          <div class="file-viewer-empty">
+                            <span class="file-viewer-empty-text">{props.t("instanceInfo.loading")}</span>
+                          </div>
+                        }
+                      >
+                        <LazyMonacoDiffViewer
                           scopeKey={props.scopeKey()}
                           path={String(file().path || "")}
                           before={String((file() as any).before || "")}
@@ -131,7 +140,8 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
                           contextMode={props.diffContextMode()}
                           wordWrap={props.diffWordWrapMode()}
                         />
-                      )}
+                      </Suspense>
+                    )}
                   </Show>
                 }
               >
@@ -144,7 +154,7 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
             }
           >
             <div class="file-viewer-empty">
-              <span class="file-viewer-empty-text">Loading…</span>
+              <span class="file-viewer-empty-text">{props.t("instanceInfo.loading")}</span>
             </div>
           </Show>
         </div>
@@ -169,7 +179,7 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
                 </div>
                 <div class="file-list-item-stats">
                   <Show when={item.status === "deleted"}>
-                    <span class="text-[10px] text-secondary">deleted</span>
+                    <span class="text-[10px] text-secondary">{props.t("instanceShell.gitChanges.deleted")}</span>
                   </Show>
                   <Show when={item.status !== "deleted"}>
                     <>
@@ -200,7 +210,7 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
                 </div>
                 <div class="file-list-item-stats">
                   <Show when={item.status === "deleted"}>
-                    <span class="text-[10px] text-secondary">deleted</span>
+                    <span class="text-[10px] text-secondary">{props.t("instanceShell.gitChanges.deleted")}</span>
                   </Show>
                   <Show when={item.status !== "deleted"}>
                     <>
@@ -220,8 +230,8 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
           <SplitFilePanel
             header={
               <>
-                <span class="files-tab-selected-path" title={selected?.path || "Git Changes"}>
-                  <span class="file-path-text">{selected?.path || "Git Changes"}</span>
+                <span class="files-tab-selected-path" title={selected?.path || props.t("instanceShell.rightPanel.tabs.gitChanges")}>
+                  <span class="file-path-text">{selected?.path || props.t("instanceShell.rightPanel.tabs.gitChanges")}</span>
                 </span>
 
             <div class="files-tab-stats" style={{ flex: "0 0 auto" }}>
@@ -264,7 +274,7 @@ const GitChangesTab: Component<GitChangesTabProps> = (props) => {
         onResizeMouseDown={props.onResizeMouseDown}
         onResizeTouchStart={props.onResizeTouchStart}
         isPhoneLayout={props.isPhoneLayout()}
-        overlayAriaLabel="Git Changes"
+        overlayAriaLabel={props.t("instanceShell.rightPanel.tabs.gitChanges")}
       />
     )
   }

packages/ui/src/components/markdown.tsx

@@ -1,5 +1,4 @@
 import { createEffect, createMemo, createSignal, onCleanup, onMount } from "solid-js"
-import { renderMarkdown, onLanguagesLoaded, decodeHtmlEntities, setMarkdownTheme } from "../lib/markdown"
 import { useGlobalCache } from "../lib/hooks/use-global-cache"
 import type { TextPart, RenderCache } from "../types/message"
 import { getLogger } from "../lib/logger"
@@ -8,6 +7,20 @@ import { useI18n } from "../lib/i18n"
 
 const log = getLogger("session")
 
+type MarkdownModule = typeof import("../lib/markdown")
+
+let markdownModulePromise: Promise<MarkdownModule> | null = null
+
+function loadMarkdownModule(): Promise<MarkdownModule> {
+  if (!markdownModulePromise) {
+    markdownModulePromise = import("../lib/markdown").catch((error) => {
+      markdownModulePromise = null
+      throw error
+    })
+  }
+  return markdownModulePromise
+}
+
 function hashText(value: string): string {
   let hash = 2166136261
   for (let index = 0; index < value.length; index++) {
@@ -24,6 +37,45 @@ function resolvePartVersion(part: TextPart, text: string): string {
   return `text-${hashText(text)}`
 }
 
+function resolvePartCacheId(part: TextPart, text: string): string {
+  const partId = typeof part.id === "string" && part.id.length > 0 ? part.id : ""
+  if (partId) {
+    return partId
+  }
+
+  return `anonymous:${hashText(text)}`
+}
+
+function decodeHtmlEntitiesLocally(content: string): string {
+  if (!content.includes("&") || typeof document === "undefined") {
+    return content
+  }
+
+  const textarea = document.createElement("textarea")
+  textarea.innerHTML = content
+  return textarea.value
+}
+
+function escapeHtml(content: string): string {
+  const map: Record<string, string> = {
+    "&": "&amp;",
+    "<": "&lt;",
+    ">": "&gt;",
+    '"': "&quot;",
+    "'": "&#039;",
+  }
+
+  return content.replace(/[&<>"']/g, (match) => map[match] ?? match)
+}
+
+function renderFallbackHtml(content: string): string {
+  if (!content) {
+    return ""
+  }
+
+  return escapeHtml(content).replace(/\n/g, "<br />")
+}
+
 interface MarkdownProps {
   part: TextPart
   instanceId?: string
@@ -38,7 +90,8 @@ export function Markdown(props: MarkdownProps) {
   const { t } = useI18n()
   const [html, setHtml] = createSignal("")
   let containerRef: HTMLDivElement | undefined
-  let latestRequestedText = ""
+  let latestRequestKey = ""
+  let cleanupLanguageListener: (() => void) | undefined
 
   const notifyRendered = () => {
     Promise.resolve().then(() => props.onRendered?.())
@@ -47,15 +100,14 @@ export function Markdown(props: MarkdownProps) {
   const resolved = createMemo(() => {
     const part = props.part
     const rawText = typeof part.text === "string" ? part.text : ""
-    const text = decodeHtmlEntities(rawText)
+    const text = decodeHtmlEntitiesLocally(rawText)
     const themeKey = Boolean(props.isDark) ? "dark" : "light"
     const highlightEnabled = !props.disableHighlight
-    const partId = typeof part.id === "string" && part.id.length > 0 ? part.id : ""
-    if (!partId) {
-      throw new Error("Markdown rendering requires a part id")
-    }
+    const partId = typeof part.id === "string" && part.id.length > 0 ? part.id : undefined
+    const cacheId = resolvePartCacheId(part, text)
     const version = resolvePartVersion(part, text)
-    return { part, text, themeKey, highlightEnabled, partId, version }
+    const requestKey = `${cacheId}:${themeKey}:${highlightEnabled ? 1 : 0}:${version}`
+    return { part, text, themeKey, highlightEnabled, partId, cacheId, version, requestKey }
   })
 
   const cacheHandle = useGlobalCache({
@@ -63,26 +115,46 @@ export function Markdown(props: MarkdownProps) {
     sessionId: () => props.sessionId,
     scope: "markdown",
     cacheId: () => {
-      const { partId, themeKey, highlightEnabled } = resolved()
-      return `${partId}:${themeKey}:${highlightEnabled ? 1 : 0}`
+      const { cacheId, themeKey, highlightEnabled } = resolved()
+      return `${cacheId}:${themeKey}:${highlightEnabled ? 1 : 0}`
     },
     version: () => resolved().version,
   })
 
-  createEffect(async () => {
-    const { part, text, themeKey, highlightEnabled, version } = resolved()
+  const commitCacheEntry = (snapshot: ReturnType<typeof resolved>, renderedHtml: string) => {
+    const cacheEntry: RenderCache = {
+      text: snapshot.text,
+      html: renderedHtml,
+      theme: snapshot.themeKey,
+      mode: snapshot.version,
+    }
+    setHtml(renderedHtml)
+    cacheHandle.set(cacheEntry)
+    notifyRendered()
+  }
 
-    // Ensure the markdown highlighter theme matches the active UI theme.
-    setMarkdownTheme(themeKey === "dark")
+  const renderSnapshot = async (snapshot: ReturnType<typeof resolved>) => {
+    const markdown = await loadMarkdownModule()
+    markdown.setMarkdownTheme(snapshot.themeKey === "dark")
+    const rendered = await markdown.renderMarkdown(snapshot.text, {
+      suppressHighlight: !snapshot.highlightEnabled,
+    })
 
-    latestRequestedText = text
+    if (latestRequestKey === snapshot.requestKey) {
+      commitCacheEntry(snapshot, rendered)
+    }
+  }
+
+  createEffect(() => {
+    const snapshot = resolved()
+    latestRequestKey = snapshot.requestKey
 
     const cacheMatches = (cache: RenderCache | undefined) => {
       if (!cache) return false
-      return cache.theme === themeKey && cache.mode === version
+      return cache.theme === snapshot.themeKey && cache.mode === snapshot.version
     }
 
-    const localCache = part.renderCache
+    const localCache = snapshot.part.renderCache
     if (localCache && cacheMatches(localCache)) {
       setHtml(localCache.html)
       notifyRendered()
@@ -96,111 +168,82 @@ export function Markdown(props: MarkdownProps) {
       return
     }
 
-    const commitCacheEntry = (renderedHtml: string) => {
-      const cacheEntry: RenderCache = { text, html: renderedHtml, theme: themeKey, mode: version }
-      setHtml(renderedHtml)
-      cacheHandle.set(cacheEntry)
-      notifyRendered()
-    }
+    setHtml(renderFallbackHtml(snapshot.text))
+    notifyRendered()
 
-    if (!highlightEnabled) {
-      try {
-        const rendered = await renderMarkdown(text, { suppressHighlight: true })
-
-        if (latestRequestedText === text) {
-          commitCacheEntry(rendered)
-        }
-      } catch (error) {
-        log.error("Failed to render markdown:", error)
-        if (latestRequestedText === text) {
-          commitCacheEntry(text)
-        }
-      }
-      return
-    }
-
-    try {
-      const rendered = await renderMarkdown(text)
-      if (latestRequestedText === text) {
-        commitCacheEntry(rendered)
-      }
-    } catch (error) {
+    void renderSnapshot(snapshot).catch((error) => {
       log.error("Failed to render markdown:", error)
-      if (latestRequestedText === text) {
-        commitCacheEntry(text)
+      if (latestRequestKey === snapshot.requestKey) {
+        commitCacheEntry(snapshot, renderFallbackHtml(snapshot.text))
       }
-    }
+    })
   })
 
   onMount(() => {
-    const handleClick = async (e: Event) => {
-      const target = e.target as HTMLElement
+    const handleClick = async (event: Event) => {
+      const target = event.target as HTMLElement
       const copyButton = target.closest(".code-block-copy") as HTMLButtonElement
 
-      if (copyButton) {
-        e.preventDefault()
-        const code = copyButton.getAttribute("data-code")
-        if (code) {
-          const decodedCode = decodeURIComponent(code)
-          const success = await copyToClipboard(decodedCode)
-          const copyText = copyButton.querySelector(".copy-text")
-          if (copyText) {
-            if (success) {
-              copyText.textContent = t("markdown.codeBlock.copy.copied")
-              setTimeout(() => {
-                copyText.textContent = t("markdown.codeBlock.copy.label")
-              }, 2000)
-            } else {
-              copyText.textContent = t("markdown.codeBlock.copy.failed")
-              setTimeout(() => {
-                copyText.textContent = t("markdown.codeBlock.copy.label")
-              }, 2000)
-            }
-          }
-        }
+      if (!copyButton) {
+        return
       }
+
+      event.preventDefault()
+      const code = copyButton.getAttribute("data-code")
+      if (!code) {
+        return
+      }
+
+      const decodedCode = decodeURIComponent(code)
+      const success = await copyToClipboard(decodedCode)
+      const copyText = copyButton.querySelector(".copy-text")
+      if (!copyText) {
+        return
+      }
+
+      copyText.textContent = success ? t("markdown.codeBlock.copy.copied") : t("markdown.codeBlock.copy.failed")
+      setTimeout(() => {
+        copyText.textContent = t("markdown.codeBlock.copy.label")
+      }, 2000)
     }
 
     containerRef?.addEventListener("click", handleClick)
 
-    const cleanupLanguageListener = onLanguagesLoaded(async () => {
-      if (props.disableHighlight) {
-        return
-      }
-
-      const { part, text, themeKey, version } = resolved()
-
-      setMarkdownTheme(themeKey === "dark")
-
-      if (latestRequestedText !== text) {
-        return
-      }
-
-      try {
-        const rendered = await renderMarkdown(text)
-        if (latestRequestedText === text) {
-          const cacheEntry: RenderCache = { text, html: rendered, theme: themeKey, mode: version }
-          setHtml(rendered)
-          cacheHandle.set(cacheEntry)
-          notifyRendered()
+    let disposed = false
+    void loadMarkdownModule()
+      .then((markdown) => {
+        if (disposed) {
+          return
         }
-      } catch (error) {
-        log.error("Failed to re-render markdown after language load:", error)
-      }
-    })
+
+        cleanupLanguageListener = markdown.onLanguagesLoaded(() => {
+          const snapshot = resolved()
+          if (!snapshot.highlightEnabled) {
+            return
+          }
+
+          latestRequestKey = snapshot.requestKey
+          void renderSnapshot(snapshot).catch((error) => {
+            log.error("Failed to re-render markdown after language load:", error)
+          })
+        })
+      })
+      .catch((error) => {
+        log.error("Failed to load markdown module:", error)
+      })
 
     onCleanup(() => {
+      disposed = true
       containerRef?.removeEventListener("click", handleClick)
-      cleanupLanguageListener()
+      cleanupLanguageListener?.()
+      cleanupLanguageListener = undefined
     })
   })
 
-  const proseClass = () => "markdown-body"
-
   return (
     <div
       ref={containerRef}
-      class={proseClass()}
+      class="markdown-body"
       data-view="markdown"
       data-part-id={resolved().partId}
       data-markdown-theme={resolved().themeKey}

packages/ui/src/components/tool-call/ansi-render.tsx

@@ -1,7 +1,7 @@
 import type { Accessor, JSXElement } from "solid-js"
 import type { RenderCache } from "../../types/message"
 import { ansiToHtml, createAnsiStreamRenderer, hasAnsi } from "../../lib/ansi"
-import { escapeHtml } from "../../lib/markdown"
+import { escapeHtml } from "../../lib/text-render-utils"
 import type { AnsiRenderOptions, ToolScrollHelpers } from "./types"
 
 type AnsiRenderCache = RenderCache & { hasAnsi: boolean }

packages/ui/src/components/tool-call/diff-render.tsx

@@ -1,11 +1,26 @@
-import type { Accessor, JSXElement } from "solid-js"
+import { Suspense, lazy, onMount, type Accessor, type JSXElement } from "solid-js"
 import type { RenderCache } from "../../types/message"
 import type { DiffViewMode } from "../../stores/preferences"
-import { ToolCallDiffViewer } from "../diff-viewer"
 import type { DiffPayload, DiffRenderOptions, ToolScrollHelpers } from "./types"
 import { getRelativePath } from "./utils"
 import { getCacheEntry } from "../../lib/global-cache"
 
+const LazyToolCallDiffViewer = lazy(() =>
+  import("../diff-viewer").then((module) => ({ default: module.ToolCallDiffViewer })),
+)
+
+function CachedDiffMarkup(props: { html: string; onRendered?: () => void }) {
+  onMount(() => {
+    props.onRendered?.()
+  })
+
+  return (
+    <div class="tool-call-diff-viewer">
+      <div innerHTML={props.html} />
+    </div>
+  )
+}
+
 type CacheHandle = {
   get<T>(): T | undefined
   params(): unknown
@@ -101,15 +116,20 @@ export function createDiffContentRenderer(params: {
             </button>
           </div>
         </div>
-        <ToolCallDiffViewer
-          diffText={payload.diffText}
-          filePath={payload.filePath}
-          theme={themeKey}
-          mode={diffMode()}
-          cachedHtml={cachedHtml}
-          cacheEntryParams={cacheEntryParams as any}
-          onRendered={handleDiffRendered}
-        />
+        {cachedHtml ? (
+          <CachedDiffMarkup html={cachedHtml} onRendered={handleDiffRendered} />
+        ) : (
+          <Suspense fallback={<pre class="tool-call-diff-fallback">{payload.diffText}</pre>}>
+            <LazyToolCallDiffViewer
+              diffText={payload.diffText}
+              filePath={payload.filePath}
+              theme={themeKey}
+              mode={diffMode()}
+              cacheEntryParams={cacheEntryParams as any}
+              onRendered={handleDiffRendered}
+            />
+          </Suspense>
+        )}
         {params.scrollHelpers.renderSentinel({ disableTracking: disableScrollTracking })}
       </div>
     )

packages/ui/src/components/tool-call/utils.ts

@@ -1,5 +1,5 @@
 import { isRenderableDiffText } from "../../lib/diff-utils"
-import { getLanguageFromPath } from "../../lib/markdown"
+import { getLanguageFromPath } from "../../lib/text-render-utils"
 import type { ToolState } from "@opencode-ai/sdk/v2"
 import type { DiffPayload } from "./types"
 import { getLogger } from "../../lib/logger"

packages/ui/src/lib/git-diff-lowlight.ts

@@ -0,0 +1,200 @@
+import { createLowlight, common } from "lowlight"
+
+type AstNode = {
+  type: string
+  value?: string
+  children?: AstNode[]
+  startIndex?: number
+  endIndex?: number
+  lineNumber?: number
+}
+
+type SyntaxNodeEntry = {
+  node: AstNode
+  wrapper?: AstNode
+}
+
+type SyntaxFileLine = {
+  value: string
+  lineNumber: number
+  valueLength: number
+  nodeList: SyntaxNodeEntry[]
+}
+
+type LowlightApi = ReturnType<typeof createLowlight>
+
+export function processAST(ast: { children: AstNode[] }) {
+  let lineNumber = 1
+  const syntaxObj: Record<number, SyntaxFileLine> = {}
+
+  const loopAST = (nodes: AstNode[], wrapper?: AstNode) => {
+    nodes.forEach((node) => {
+      if (node.type === "text") {
+        const textValue = node.value ?? ""
+        if (!textValue.includes("\n")) {
+          const valueLength = textValue.length
+          if (!syntaxObj[lineNumber]) {
+            node.startIndex = 0
+            node.endIndex = valueLength - 1
+            syntaxObj[lineNumber] = {
+              value: textValue,
+              lineNumber,
+              valueLength,
+              nodeList: [{ node, wrapper }],
+            }
+          } else {
+            node.startIndex = syntaxObj[lineNumber].valueLength
+            node.endIndex = node.startIndex + valueLength - 1
+            syntaxObj[lineNumber].value += textValue
+            syntaxObj[lineNumber].valueLength += valueLength
+            syntaxObj[lineNumber].nodeList.push({ node, wrapper })
+          }
+          node.lineNumber = lineNumber
+          return
+        }
+
+        const lines = textValue.split("\n")
+        node.children = node.children || []
+        for (let index = 0; index < lines.length; index++) {
+          const value = index === lines.length - 1 ? lines[index] : `${lines[index]}\n`
+          const currentLineNumber = index === 0 ? lineNumber : ++lineNumber
+          const valueLength = value.length
+          const childNode: AstNode = {
+            type: "text",
+            value,
+            startIndex: Infinity,
+            endIndex: Infinity,
+            lineNumber: currentLineNumber,
+          }
+
+          if (!syntaxObj[currentLineNumber]) {
+            childNode.startIndex = 0
+            childNode.endIndex = valueLength - 1
+            syntaxObj[currentLineNumber] = {
+              value,
+              lineNumber: currentLineNumber,
+              valueLength,
+              nodeList: [{ node: childNode, wrapper }],
+            }
+          } else {
+            childNode.startIndex = syntaxObj[currentLineNumber].valueLength
+            childNode.endIndex = childNode.startIndex + valueLength - 1
+            syntaxObj[currentLineNumber].value += value
+            syntaxObj[currentLineNumber].valueLength += valueLength
+            syntaxObj[currentLineNumber].nodeList.push({ node: childNode, wrapper })
+          }
+
+          node.children.push(childNode)
+        }
+
+        node.lineNumber = lineNumber
+        return
+      }
+
+      if (node.children) {
+        loopAST(node.children, node)
+        node.lineNumber = lineNumber
+      }
+    })
+  }
+
+  loopAST(ast.children)
+  return { syntaxFileObject: syntaxObj, syntaxFileLineNumber: lineNumber }
+}
+
+export function _getAST() {
+  return {}
+}
+
+const lowlight = createLowlight(common)
+
+lowlight.register("vue", function hljsDefineVue(hljs: any) {
+  return {
+    subLanguage: "xml",
+    contains: [
+      hljs.COMMENT("<!--", "-->", { relevance: 10 }),
+      {
+        begin: /^(\s*)(<script>)/gm,
+        end: /^(\s*)(<\/script>)/gm,
+        subLanguage: "javascript",
+        excludeBegin: true,
+        excludeEnd: true,
+      },
+      {
+        begin: /^(?:\s*)(?:<script\s+lang=(["'])ts\1>)/gm,
+        end: /^(\s*)(<\/script>)/gm,
+        subLanguage: "typescript",
+        excludeBegin: true,
+        excludeEnd: true,
+      },
+      {
+        begin: /^(\s*)(<style(\s+scoped)?>)/gm,
+        end: /^(\s*)(<\/style>)/gm,
+        subLanguage: "css",
+        excludeBegin: true,
+        excludeEnd: true,
+      },
+      {
+        begin: /^(?:\s*)(?:<style(?:\s+scoped)?\s+lang=(["'])(?:s[ca]ss)\1(?:\s+scoped)?>)/gm,
+        end: /^(\s*)(<\/style>)/gm,
+        subLanguage: "scss",
+        excludeBegin: true,
+        excludeEnd: true,
+      },
+      {
+        begin: /^(?:\s*)(?:<style(?:\s+scoped)?\s+lang=(["'])stylus\1(?:\s+scoped)?>)/gm,
+        end: /^(\s*)(<\/style>)/gm,
+        subLanguage: "stylus",
+        excludeBegin: true,
+        excludeEnd: true,
+      },
+    ],
+  }
+})
+
+let maxLineToIgnoreSyntax = 2000
+const ignoreSyntaxHighlightList: (string | RegExp)[] = []
+
+export const highlighter = {
+  name: "lowlight",
+  get maxLineToIgnoreSyntax() {
+    return maxLineToIgnoreSyntax
+  },
+  setMaxLineToIgnoreSyntax(value: number) {
+    maxLineToIgnoreSyntax = value
+  },
+  get ignoreSyntaxHighlightList() {
+    return ignoreSyntaxHighlightList
+  },
+  setIgnoreSyntaxHighlightList(values: (string | RegExp)[]) {
+    ignoreSyntaxHighlightList.length = 0
+    ignoreSyntaxHighlightList.push(...values)
+  },
+  getAST(raw: string, fileName?: string, lang?: string) {
+    const language = typeof lang === "string" ? lang.trim() : ""
+    if (
+      fileName &&
+      ignoreSyntaxHighlightList.some((item) => (item instanceof RegExp ? item.test(fileName) : fileName === item))
+    ) {
+      return undefined
+    }
+
+    if (language && lowlight.registered(language)) {
+      return lowlight.highlight(language, raw)
+    }
+
+    return lowlight.highlightAuto(raw)
+  },
+  processAST(ast: { children: AstNode[] }) {
+    return processAST(ast)
+  },
+  hasRegisteredCurrentLang(lang: string) {
+    return lowlight.registered(lang)
+  },
+  getHighlighterEngine(): LowlightApi {
+    return lowlight
+  },
+  type: "class" as const,
+}
+
+export const versions = "local-common"

packages/ui/src/lib/i18n/messages/en/instance.ts

@@ -114,6 +114,10 @@ export const instanceMessages = {
   "instanceShell.sessionChanges.filesChanged": "{count} files changed",
   "instanceShell.sessionChanges.actions.show": "Show changes",
 
+  "instanceShell.gitChanges.loading": "Loading git changes...",
+  "instanceShell.gitChanges.empty": "No git changes yet.",
+  "instanceShell.gitChanges.deleted": "Deleted",
+
   "instanceShell.filesShell.fileListTitle": "File list",
   "instanceShell.filesShell.mobileSelectorLabel": "Select file",
   "instanceShell.filesShell.mobileSelectorEmpty": "Select a file",

packages/ui/src/lib/i18n/messages/es/instance.ts

@@ -90,6 +90,7 @@ export const instanceMessages = {
 
   "instanceShell.rightPanel.title": "Panel de estado",
   "instanceShell.rightPanel.tabs.changes": "Cambios",
+  "instanceShell.rightPanel.tabs.gitChanges": "Cambios de Git",
   "instanceShell.rightPanel.tabs.files": "Archivos",
   "instanceShell.rightPanel.tabs.status": "Estado",
   "instanceShell.rightPanel.tabs.ariaLabel": "Pestañas del panel derecho",
@@ -112,6 +113,10 @@ export const instanceMessages = {
   "instanceShell.sessionChanges.filesChanged": "{count} archivos cambiados",
   "instanceShell.sessionChanges.actions.show": "Mostrar cambios",
 
+  "instanceShell.gitChanges.loading": "Cargando cambios de Git...",
+  "instanceShell.gitChanges.empty": "Aún no hay cambios de Git.",
+  "instanceShell.gitChanges.deleted": "Eliminado",
+
   "instanceShell.filesShell.fileListTitle": "Lista de archivos",
   "instanceShell.filesShell.mobileSelectorLabel": "Seleccionar archivo",
   "instanceShell.filesShell.mobileSelectorEmpty": "Selecciona un archivo",

packages/ui/src/lib/i18n/messages/fr/instance.ts

@@ -90,6 +90,7 @@ export const instanceMessages = {
 
   "instanceShell.rightPanel.title": "Panneau d'état",
   "instanceShell.rightPanel.tabs.changes": "Modifications",
+  "instanceShell.rightPanel.tabs.gitChanges": "Changements Git",
   "instanceShell.rightPanel.tabs.files": "Fichiers",
   "instanceShell.rightPanel.tabs.status": "Statut",
   "instanceShell.rightPanel.tabs.ariaLabel": "Onglets du panneau droit",
@@ -112,6 +113,10 @@ export const instanceMessages = {
   "instanceShell.sessionChanges.filesChanged": "{count} fichiers modifiés",
   "instanceShell.sessionChanges.actions.show": "Afficher les changements",
 
+  "instanceShell.gitChanges.loading": "Chargement des changements Git...",
+  "instanceShell.gitChanges.empty": "Aucun changement Git pour l'instant.",
+  "instanceShell.gitChanges.deleted": "Supprimé",
+
   "instanceShell.filesShell.fileListTitle": "Liste des fichiers",
   "instanceShell.filesShell.mobileSelectorLabel": "Sélectionner un fichier",
   "instanceShell.filesShell.mobileSelectorEmpty": "Sélectionnez un fichier",

packages/ui/src/lib/i18n/messages/ja/instance.ts

@@ -90,6 +90,7 @@ export const instanceMessages = {
 
   "instanceShell.rightPanel.title": "ステータスパネル",
   "instanceShell.rightPanel.tabs.changes": "変更",
+  "instanceShell.rightPanel.tabs.gitChanges": "Git 変更",
   "instanceShell.rightPanel.tabs.files": "ファイル",
   "instanceShell.rightPanel.tabs.status": "ステータス",
   "instanceShell.rightPanel.tabs.ariaLabel": "右パネルのタブ",
@@ -112,6 +113,10 @@ export const instanceMessages = {
   "instanceShell.sessionChanges.filesChanged": "{count} 個のファイルが変更されました",
   "instanceShell.sessionChanges.actions.show": "変更を表示",
 
+  "instanceShell.gitChanges.loading": "Git の変更を読み込み中...",
+  "instanceShell.gitChanges.empty": "Git の変更はまだありません。",
+  "instanceShell.gitChanges.deleted": "削除済み",
+
   "instanceShell.filesShell.fileListTitle": "ファイル一覧",
   "instanceShell.filesShell.mobileSelectorLabel": "ファイルを選択",
   "instanceShell.filesShell.mobileSelectorEmpty": "ファイルを選択してください",

packages/ui/src/lib/i18n/messages/ru/instance.ts

@@ -90,6 +90,7 @@ export const instanceMessages = {
 
   "instanceShell.rightPanel.title": "Панель состояния",
   "instanceShell.rightPanel.tabs.changes": "Изменения",
+  "instanceShell.rightPanel.tabs.gitChanges": "Изменения Git",
   "instanceShell.rightPanel.tabs.files": "Файлы",
   "instanceShell.rightPanel.tabs.status": "Статус",
   "instanceShell.rightPanel.tabs.ariaLabel": "Вкладки правой панели",
@@ -112,6 +113,10 @@ export const instanceMessages = {
   "instanceShell.sessionChanges.filesChanged": "Изменено файлов: {count}",
   "instanceShell.sessionChanges.actions.show": "Показать изменения",
 
+  "instanceShell.gitChanges.loading": "Загрузка изменений Git...",
+  "instanceShell.gitChanges.empty": "Изменений Git пока нет.",
+  "instanceShell.gitChanges.deleted": "Удалено",
+
   "instanceShell.filesShell.fileListTitle": "Список файлов",
   "instanceShell.filesShell.mobileSelectorLabel": "Выбрать файл",
   "instanceShell.filesShell.mobileSelectorEmpty": "Выберите файл",

packages/ui/src/lib/i18n/messages/zh-Hans/instance.ts

@@ -90,6 +90,7 @@ export const instanceMessages = {
 
   "instanceShell.rightPanel.title": "状态面板",
   "instanceShell.rightPanel.tabs.changes": "更改",
+  "instanceShell.rightPanel.tabs.gitChanges": "Git 更改",
   "instanceShell.rightPanel.tabs.files": "文件",
   "instanceShell.rightPanel.tabs.status": "状态",
   "instanceShell.rightPanel.tabs.ariaLabel": "右侧面板标签页",
@@ -112,6 +113,10 @@ export const instanceMessages = {
   "instanceShell.sessionChanges.filesChanged": "已更改 {count} 个文件",
   "instanceShell.sessionChanges.actions.show": "显示更改",
 
+  "instanceShell.gitChanges.loading": "正在加载 Git 更改...",
+  "instanceShell.gitChanges.empty": "暂无 Git 更改。",
+  "instanceShell.gitChanges.deleted": "已删除",
+
   "instanceShell.filesShell.fileListTitle": "文件列表",
   "instanceShell.filesShell.mobileSelectorLabel": "选择文件",
   "instanceShell.filesShell.mobileSelectorEmpty": "请选择文件",

packages/ui/src/lib/markdown.ts

@@ -1,7 +1,8 @@
 import { marked } from "marked"
-import { createHighlighter, type Highlighter, bundledLanguages } from "shiki/bundle/full"
 import { getLogger } from "./logger"
 import { tGlobal } from "./i18n"
+import type { Highlighter } from "shiki/bundle/full"
+import { decodeHtmlEntities, escapeHtml } from "./text-render-utils"
 
 const log = getLogger("actions")
 
@@ -11,43 +12,8 @@ let currentTheme: "light" | "dark" = "light"
 let isInitialized = false
 let highlightSuppressed = false
 let rendererSetup = false
-
-const extensionToLanguage: Record<string, string> = {
-  ts: "typescript",
-  tsx: "typescript",
-  js: "javascript",
-  jsx: "javascript",
-  py: "python",
-  sh: "bash",
-  bash: "bash",
-  json: "json",
-  html: "html",
-  css: "css",
-  md: "markdown",
-  yaml: "yaml",
-  yml: "yaml",
-  sql: "sql",
-  rs: "rust",
-  go: "go",
-  cpp: "cpp",
-  cc: "cpp",
-  cxx: "cpp",
-  hpp: "cpp",
-  h: "cpp",
-  c: "c",
-  java: "java",
-  cs: "csharp",
-  php: "php",
-  rb: "ruby",
-  swift: "swift",
-  kt: "kotlin",
-}
-
-export function getLanguageFromPath(path?: string | null): string | undefined {
-  if (!path) return undefined
-  const ext = path.split(".").pop()?.toLowerCase()
-  return ext ? extensionToLanguage[ext] : undefined
-}
+let shikiModulePromise: Promise<typeof import("shiki/bundle/full")> | null = null
+let bundledLanguagesCache: typeof import("shiki/bundle/full")["bundledLanguages"] | null = null
 
 // Track loaded languages and queue for on-demand loading
 const loadedLanguages = new Set<string>()
@@ -89,10 +55,15 @@ async function getOrCreateHighlighter() {
     return highlighterPromise
   }
 
-  // Create highlighter with no preloaded languages
-  highlighterPromise = createHighlighter({
-    themes: ["github-light", "github-light-high-contrast", "github-dark"],
-    langs: [],
+  highlighterPromise = (async () => {
+    const shiki = await loadShikiModule()
+    return shiki.createHighlighter({
+      themes: ["github-light", "github-light-high-contrast", "github-dark"],
+      langs: [],
+    })
+  })().catch((error) => {
+    highlighterPromise = null
+    throw error
   })
 
   highlighter = await highlighterPromise
@@ -100,12 +71,37 @@ async function getOrCreateHighlighter() {
   return highlighter
 }
 
+async function loadShikiModule() {
+  if (!shikiModulePromise) {
+    shikiModulePromise = import("shiki/bundle/full").then((module) => {
+      bundledLanguagesCache = module.bundledLanguages
+      return module
+    })
+  }
+
+  return shikiModulePromise
+}
+
+function queueHighlighterWarmup() {
+  if (highlighter || highlighterPromise) {
+    return
+  }
+
+  void getOrCreateHighlighter().catch((error) => {
+    log.warn("Failed to initialize markdown highlighter", error)
+  })
+}
+
 function normalizeLanguageToken(token: string): string {
   return token.trim().toLowerCase()
 }
 
 function resolveLanguage(token: string): { canonical: string | null; raw: string } {
   const normalized = normalizeLanguageToken(token)
+  const bundledLanguages = bundledLanguagesCache
+  if (!bundledLanguages) {
+    return { canonical: null, raw: normalized }
+  }
 
   // Check if it's a direct key match
   if (normalized in bundledLanguages) {
@@ -148,32 +144,43 @@ async function ensureLanguages(content: string) {
 
   // Queue language loading tasks
   for (const token of foundLanguages) {
-    const { canonical, raw } = resolveLanguage(token)
-    const langKey = canonical || raw
+    const rawToken = normalizeLanguageToken(token)
+    if (!rawToken) {
+      continue
+    }
 
     // Skip "text" and aliases since Shiki handles plain text already
-    if (langKey === "text" || raw === "text") {
+    if (rawToken === "text") {
       continue
     }
 
     // Skip if already loaded or queued
-    if (loadedLanguages.has(langKey) || queuedLanguages.has(langKey)) {
+    if (loadedLanguages.has(rawToken) || queuedLanguages.has(rawToken)) {
       continue
     }
 
-    queuedLanguages.add(langKey)
+    queuedLanguages.add(rawToken)
 
     // Queue the language loading task
     languageLoadQueue.push(async () => {
       try {
+        await loadShikiModule()
+        const { canonical, raw } = resolveLanguage(token)
+        const langKey = canonical || raw
+
+        if (langKey === "text" || raw === "text") {
+          return
+        }
+
         const h = await getOrCreateHighlighter()
         await h.loadLanguage(langKey as never)
         loadedLanguages.add(langKey)
+        loadedLanguages.add(raw)
         triggerLanguageListeners()
       } catch {
         // Quietly ignore errors
       } finally {
-        queuedLanguages.delete(langKey)
+        queuedLanguages.delete(rawToken)
       }
     })
   }
@@ -184,52 +191,6 @@ async function ensureLanguages(content: string) {
   }
 }
 
-export function decodeHtmlEntities(content: string): string {
-  if (!content.includes("&")) {
-    return content
-  }
-
-  const entityPattern = /&(#x?[0-9a-fA-F]+|[a-zA-Z][a-zA-Z0-9]+);/g
-  const namedEntities: Record<string, string> = {
-    amp: "&",
-    lt: "<",
-    gt: ">",
-    quot: '"',
-    apos: "'",
-    nbsp: " ",
-  }
-
-  let result = content
-  let previous = ""
-
-  while (result.includes("&") && result !== previous) {
-    previous = result
-    result = result.replace(entityPattern, (match, entity) => {
-      if (!entity) {
-        return match
-      }
-
-      if (entity[0] === "#") {
-        const isHex = entity[1]?.toLowerCase() === "x"
-        const value = isHex ? parseInt(entity.slice(2), 16) : parseInt(entity.slice(1), 10)
-        if (!Number.isNaN(value)) {
-          try {
-            return String.fromCodePoint(value)
-          } catch {
-            return match
-          }
-        }
-        return match
-      }
-
-      const decoded = namedEntities[entity.toLowerCase()]
-      return decoded !== undefined ? decoded : match
-    })
-  }
-
-  return result
-}
-
 async function runLanguageLoadQueue() {
   if (isQueueRunning || languageLoadQueue.length === 0) {
     return
@@ -249,7 +210,6 @@ async function runLanguageLoadQueue() {
 
 function setupRenderer(isDark: boolean) {
   currentTheme = isDark ? "dark" : "light"
-  if (!highlighter) return
   if (rendererSetup) return
 
   marked.setOptions({
@@ -330,8 +290,9 @@ function setupRenderer(isDark: boolean) {
 }
 
 export async function initMarkdown(isDark: boolean) {
-  await getOrCreateHighlighter()
   setupRenderer(isDark)
+  queueHighlighterWarmup()
+  await getOrCreateHighlighter()
   isInitialized = true
 }
 
@@ -350,15 +311,16 @@ export async function renderMarkdown(
   },
 ): Promise<string> {
   if (!isInitialized) {
-    await initMarkdown(currentTheme === "dark")
+    setupRenderer(currentTheme === "dark")
+    isInitialized = true
   }
 
   const suppressHighlight = options?.suppressHighlight ?? false
   const decoded = decodeHtmlEntities(content)
 
   if (!suppressHighlight) {
-    // Queue language loading but don't wait for it to complete
-    await ensureLanguages(decoded)
+    queueHighlighterWarmup()
+    void ensureLanguages(decoded)
   }
 
   const previousSuppressed = highlightSuppressed
@@ -375,13 +337,3 @@ export async function renderMarkdown(
 export async function getSharedHighlighter(): Promise<Highlighter> {
   return getOrCreateHighlighter()
 }
-
-export function escapeHtml(text: string): string {
-  const map: Record<string, string> = {
-    "&": "&amp;",
-    "<": "&lt;",
-    '"': "&quot;",
-    "'": "&#039;",
-  }
-  return text.replace(/[&<"']/g, (m) => map[m])
-}

packages/ui/src/lib/text-render-utils.ts

@@ -0,0 +1,92 @@
+const extensionToLanguage: Record<string, string> = {
+  ts: "typescript",
+  tsx: "typescript",
+  js: "javascript",
+  jsx: "javascript",
+  py: "python",
+  sh: "bash",
+  bash: "bash",
+  json: "json",
+  html: "html",
+  css: "css",
+  md: "markdown",
+  yaml: "yaml",
+  yml: "yaml",
+  sql: "sql",
+  rs: "rust",
+  go: "go",
+  cpp: "cpp",
+  cc: "cpp",
+  cxx: "cpp",
+  hpp: "cpp",
+  h: "cpp",
+  c: "c",
+  java: "java",
+  cs: "csharp",
+  php: "php",
+  rb: "ruby",
+  swift: "swift",
+  kt: "kotlin",
+}
+
+export function getLanguageFromPath(path?: string | null): string | undefined {
+  if (!path) return undefined
+  const ext = path.split(".").pop()?.toLowerCase()
+  return ext ? extensionToLanguage[ext] : undefined
+}
+
+export function decodeHtmlEntities(content: string): string {
+  if (!content.includes("&")) {
+    return content
+  }
+
+  const entityPattern = /&(#x?[0-9a-fA-F]+|[a-zA-Z][a-zA-Z0-9]+);/g
+  const namedEntities: Record<string, string> = {
+    amp: "&",
+    lt: "<",
+    gt: ">",
+    quot: '"',
+    apos: "'",
+    nbsp: " ",
+  }
+
+  let result = content
+  let previous = ""
+
+  while (result.includes("&") && result !== previous) {
+    previous = result
+    result = result.replace(entityPattern, (match, entity) => {
+      if (!entity) {
+        return match
+      }
+
+      if (entity[0] === "#") {
+        const isHex = entity[1]?.toLowerCase() === "x"
+        const value = isHex ? parseInt(entity.slice(2), 16) : parseInt(entity.slice(1), 10)
+        if (!Number.isNaN(value)) {
+          try {
+            return String.fromCodePoint(value)
+          } catch {
+            return match
+          }
+        }
+        return match
+      }
+
+      const decoded = namedEntities[entity.toLowerCase()]
+      return decoded !== undefined ? decoded : match
+    })
+  }
+
+  return result
+}
+
+export function escapeHtml(text: string): string {
+  const map: Record<string, string> = {
+    "&": "&amp;",
+    "<": "&lt;",
+    '"': "&quot;",
+    "'": "&#039;",
+  }
+  return text.replace(/[&<"']/g, (match) => map[match])
+}

packages/ui/src/stores/message-v2/normalizers.ts

@@ -1,4 +1,4 @@
-import { decodeHtmlEntities } from "../../lib/markdown"
+import { decodeHtmlEntities } from "../../lib/text-render-utils"
 
 function decodeTextSegment(segment: any): any {
   if (typeof segment === "string") {

packages/ui/vite.config.ts

@@ -134,6 +134,34 @@ export default defineConfig({
         main: resolve(__dirname, "./src/renderer/index.html"),
         loading: resolve(__dirname, "./src/renderer/loading.html"),
       },
+      output: {
+        manualChunks(id) {
+          const normalizedId = id.replace(/\\/g, "/")
+
+          if (normalizedId.includes("/node_modules/@git-diff-view/")) {
+            return "git-diff-vendor"
+          }
+
+          if (normalizedId.includes("/node_modules/highlight.js/") || normalizedId.includes("/node_modules/lowlight/")) {
+            return "highlight-vendor"
+          }
+
+          if (normalizedId.includes("/node_modules/fast-diff/")) {
+            return "fast-diff-vendor"
+          }
+
+          if (normalizedId.includes("/node_modules/monaco-editor/")) {
+            return "monaco-vendor"
+          }
+
+          if (
+            normalizedId.includes("/src/components/file-viewer/") ||
+            normalizedId.includes("/src/lib/monaco/")
+          ) {
+            return "monaco-viewer"
+          }
+        },
+      },
     },
   },
 })