v2 message format and upgrade to ai sdk v5 (#743)

Co-authored-by: GitHub Action <[email protected]>
Co-authored-by: Liang-Shih Lin <[email protected]>
Co-authored-by: Dominik Engelhardt <[email protected]>
Co-authored-by: Jay V <[email protected]>
Co-authored-by: adamdottv <[email protected]>

11 files changed, 1809 insertions, 0 deletions

diff --git a/packages/web/src/components/share/common.tsx b/packages/web/src/components/share/common.tsx
new file mode 100644
index 000000000..9f5221de9
--- /dev/null
+++ b/packages/web/src/components/share/common.tsx
@@ -0,0 +1,60 @@
+import { createSignal, onCleanup, splitProps } from "solid-js"
+import type { JSX } from "solid-js/jsx-runtime"
+import { IconCheckCircle, IconHashtag } from "../icons"
+
+interface AnchorProps extends JSX.HTMLAttributes<HTMLDivElement> {
+  id: string
+}
+export function AnchorIcon(props: AnchorProps) {
+  const [local, rest] = splitProps(props, ["id", "children"])
+  const [copied, setCopied] = createSignal(false)
+
+  return (
+    <div {...rest} data-element-anchor title="Link to this message" data-status={copied() ? "copied" : ""}>
+      <a
+        href={`#${local.id}`}
+        onClick={(e) => {
+          e.preventDefault()
+
+          const anchor = e.currentTarget
+          const hash = anchor.getAttribute("href") || ""
+          const { origin, pathname, search } = window.location
+
+          navigator.clipboard
+            .writeText(`${origin}${pathname}${search}${hash}`)
+            .catch((err) => console.error("Copy failed", err))
+
+          setCopied(true)
+          setTimeout(() => setCopied(false), 3000)
+        }}
+      >
+        {local.children}
+        <IconHashtag width={18} height={18} />
+        <IconCheckCircle width={18} height={18} />
+      </a>
+      <span data-element-tooltip>Copied!</span>
+    </div>
+  )
+}
+
+export function createOverflow() {
+  const [overflow, setOverflow] = createSignal(false)
+  return {
+    get status() {
+      return overflow()
+    },
+    ref(el: HTMLElement) {
+      const ro = new ResizeObserver(() => {
+        if (el.scrollHeight > el.clientHeight + 1) {
+          setOverflow(true)
+        }
+        return
+      })
+      ro.observe(el)
+
+      onCleanup(() => {
+        ro.disconnect()
+      })
+    },
+  }
+}
diff --git a/packages/web/src/components/share/content-code.module.css b/packages/web/src/components/share/content-code.module.css
new file mode 100644
index 000000000..b95f936da
--- /dev/null
+++ b/packages/web/src/components/share/content-code.module.css
@@ -0,0 +1,25 @@
+.root {
+  max-width: var(--md-tool-width);
+  border: 1px solid var(--sl-color-divider);
+  background-color: var(--sl-color-bg-surface);
+  border-radius: 0.25rem;
+  padding: 0.5rem calc(0.5rem + 3px);
+
+  &[data-flush="true"] {
+    border: none;
+    background-color: transparent;
+    padding: 0;
+  }
+
+  pre {
+    --shiki-dark-bg: var(--sl-color-bg-surface) !important;
+    line-height: 1.6;
+    font-size: 0.75rem;
+    white-space: pre-wrap;
+    word-break: break-word;
+
+    span {
+      white-space: break-spaces;
+    }
+  }
+}
diff --git a/packages/web/src/components/share/content-code.tsx b/packages/web/src/components/share/content-code.tsx
new file mode 100644
index 000000000..b8c4f2ccd
--- /dev/null
+++ b/packages/web/src/components/share/content-code.tsx
@@ -0,0 +1,32 @@
+import { type JSX, splitProps, createResource, Suspense } from "solid-js"
+import { codeToHtml } from "shiki"
+import style from "./content-code.module.css"
+import { transformerNotationDiff } from "@shikijs/transformers"
+
+interface Props {
+  code: string
+  lang?: string
+  flush?: boolean
+}
+export function ContentCode(props: Props) {
+  const [html] = createResource(
+    () => [props.code, props.lang],
+    async ([code, lang]) => {
+      // TODO: For testing delays
+      // await new Promise((resolve) => setTimeout(resolve, 3000))
+      return (await codeToHtml(code || "", {
+        lang: lang || "text",
+        themes: {
+          light: "github-light",
+          dark: "github-dark",
+        },
+        transformers: [transformerNotationDiff()],
+      })) as string
+    },
+  )
+  return (
+    <Suspense>
+      <div innerHTML={html()} class={style.root} data-flush={props.flush === true ? true : undefined} />
+    </Suspense>
+  )
+}
diff --git a/packages/web/src/components/share/content-diff.module.css b/packages/web/src/components/share/content-diff.module.css
new file mode 100644
index 000000000..718ae3690
--- /dev/null
+++ b/packages/web/src/components/share/content-diff.module.css
@@ -0,0 +1,125 @@
+.root {
+  display: flex;
+  flex-direction: column;
+  border: 1px solid var(--sl-color-divider);
+  background-color: var(--sl-color-bg-surface);
+  border-radius: 0.25rem;
+
+  [data-component="desktop"] {
+    display: block;
+  }
+
+  [data-component="mobile"] {
+    display: none;
+  }
+
+  [data-component="diff-block"] {
+    display: flex;
+    flex-direction: column;
+  }
+
+  [data-component="diff-row"] {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    align-items: stretch;
+
+    [data-slot="before"],
+    [data-slot="after"] {
+      position: relative;
+      display: flex;
+      flex-direction: column;
+      overflow-x: visible;
+      min-width: 0;
+      align-items: stretch;
+      padding: 0 1rem;
+
+      &[data-diff-type="removed"] {
+        background-color: var(--sl-color-red-low);
+
+        pre {
+          --shiki-dark-bg: var(--sl-color-red-low) !important;
+          background-color: var(--sl-color-red-low) !important;
+        }
+
+        &::before {
+          content: "-";
+          position: absolute;
+          left: 0.5ch;
+          top: 1px;
+          user-select: none;
+          color: var(--sl-color-red-high);
+        }
+      }
+
+      &[data-diff-type="added"] {
+        background-color: var(--sl-color-green-low);
+
+        pre {
+          --shiki-dark-bg: var(--sl-color-green-low) !important;
+          background-color: var(--sl-color-green-low) !important;
+        }
+
+        &::before {
+          content: "+";
+          position: absolute;
+          user-select: none;
+          color: var(--sl-color-green-high);
+          left: 0.5ch;
+          top: 1px;
+        }
+      }
+    }
+
+    [data-slot="before"] {
+      border-right: 1px solid var(--sl-color-divider);
+    }
+  }
+
+  .diff > .row:first-child [data-section="cell"]:first-child {
+    padding-top: 0.5rem;
+  }
+
+  .diff > .row:last-child [data-section="cell"]:last-child {
+    padding-bottom: 0.5rem;
+  }
+
+  [data-section="cell"] {
+    position: relative;
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+
+    width: 100%;
+    padding: 0.1875rem 0.5rem 0.1875rem 2.2ch;
+    margin: 0;
+
+    &[data-display-mobile="true"] {
+      display: none;
+    }
+
+    pre {
+      --shiki-dark-bg: var(--sl-color-bg-surface) !important;
+      background-color: var(--sl-color-bg-surface) !important;
+
+      white-space: pre-wrap;
+      word-break: break-word;
+
+      code > span:empty::before {
+        content: "\00a0";
+        white-space: pre;
+        display: inline-block;
+        width: 0;
+      }
+    }
+  }
+
+  @media (max-width: 40rem) {
+    [data-slot="desktop"] {
+      display: none;
+    }
+
+    [data-slot="mobile"] {
+      display: block;
+    }
+  }
+}
diff --git a/packages/web/src/components/share/content-diff.tsx b/packages/web/src/components/share/content-diff.tsx
new file mode 100644
index 000000000..894145c34
--- /dev/null
+++ b/packages/web/src/components/share/content-diff.tsx
@@ -0,0 +1,231 @@
+import { type Component, createMemo } from "solid-js"
+import { parsePatch } from "diff"
+import { ContentCode } from "./content-code"
+import styles from "./content-diff.module.css"
+
+type DiffRow = {
+  left: string
+  right: string
+  type: "added" | "removed" | "unchanged" | "modified"
+}
+
+interface Props {
+  diff: string
+  lang?: string
+}
+
+export function ContentDiff(props: Props) {
+  const rows = createMemo(() => {
+    const diffRows: DiffRow[] = []
+
+    try {
+      const patches = parsePatch(props.diff)
+
+      for (const patch of patches) {
+        for (const hunk of patch.hunks) {
+          const lines = hunk.lines
+          let i = 0
+
+          while (i < lines.length) {
+            const line = lines[i]
+            const content = line.slice(1)
+            const prefix = line[0]
+
+            if (prefix === "-") {
+              // Look ahead for consecutive additions to pair with removals
+              const removals: string[] = [content]
+              let j = i + 1
+
+              // Collect all consecutive removals
+              while (j < lines.length && lines[j][0] === "-") {
+                removals.push(lines[j].slice(1))
+                j++
+              }
+
+              // Collect all consecutive additions that follow
+              const additions: string[] = []
+              while (j < lines.length && lines[j][0] === "+") {
+                additions.push(lines[j].slice(1))
+                j++
+              }
+
+              // Pair removals with additions
+              const maxLength = Math.max(removals.length, additions.length)
+              for (let k = 0; k < maxLength; k++) {
+                const hasLeft = k < removals.length
+                const hasRight = k < additions.length
+
+                if (hasLeft && hasRight) {
+                  // Replacement - left is removed, right is added
+                  diffRows.push({
+                    left: removals[k],
+                    right: additions[k],
+                    type: "modified",
+                  })
+                } else if (hasLeft) {
+                  // Pure removal
+                  diffRows.push({
+                    left: removals[k],
+                    right: "",
+                    type: "removed",
+                  })
+                } else if (hasRight) {
+                  // Pure addition - only create if we actually have content
+                  diffRows.push({
+                    left: "",
+                    right: additions[k],
+                    type: "added",
+                  })
+                }
+              }
+
+              i = j
+            } else if (prefix === "+") {
+              // Standalone addition (not paired with removal)
+              diffRows.push({
+                left: "",
+                right: content,
+                type: "added",
+              })
+              i++
+            } else if (prefix === " ") {
+              diffRows.push({
+                left: content,
+                right: content,
+                type: "unchanged",
+              })
+              i++
+            } else {
+              i++
+            }
+          }
+        }
+      }
+    } catch (error) {
+      console.error("Failed to parse patch:", error)
+      return []
+    }
+
+    return diffRows
+  })
+
+  const mobileRows = createMemo(() => {
+    const mobileBlocks: { type: "removed" | "added" | "unchanged"; lines: string[] }[] = []
+    const currentRows = rows()
+
+    let i = 0
+    while (i < currentRows.length) {
+      const removedLines: string[] = []
+      const addedLines: string[] = []
+
+      // Collect consecutive modified/removed/added rows
+      while (
+        i < currentRows.length &&
+        (currentRows[i].type === "modified" || currentRows[i].type === "removed" || currentRows[i].type === "added")
+      ) {
+        const row = currentRows[i]
+        if (row.left && (row.type === "removed" || row.type === "modified")) {
+          removedLines.push(row.left)
+        }
+        if (row.right && (row.type === "added" || row.type === "modified")) {
+          addedLines.push(row.right)
+        }
+        i++
+      }
+
+      // Add grouped blocks
+      if (removedLines.length > 0) {
+        mobileBlocks.push({ type: "removed", lines: removedLines })
+      }
+      if (addedLines.length > 0) {
+        mobileBlocks.push({ type: "added", lines: addedLines })
+      }
+
+      // Add unchanged rows as-is
+      if (i < currentRows.length && currentRows[i].type === "unchanged") {
+        mobileBlocks.push({
+          type: "unchanged",
+          lines: [currentRows[i].left],
+        })
+        i++
+      }
+    }
+
+    return mobileBlocks
+  })
+
+  return (
+    <div class={styles.root}>
+      <div data-component="desktop">
+        {rows().map((r) => (
+          <div data-component="diff-row" data-type={r.type}>
+            <div data-slot="before" data-diff-type={r.type === "removed" || r.type === "modified" ? "removed" : ""}>
+              <ContentCode code={r.left} flush lang={props.lang} />
+            </div>
+            <div data-slot="after" data-diff-type={r.type === "added" || r.type === "modified" ? "added" : ""}>
+              <ContentCode code={r.right} lang={props.lang} flush />
+            </div>
+          </div>
+        ))}
+      </div>
+
+      <div data-component="mobile">
+        {mobileRows().map((block) => (
+          <div data-component="diff-block" data-type={block.type}>
+            {block.lines.map((line) => (
+              <ContentCode
+                code={line}
+                lang={props.lang}
+                data-section="cell"
+                data-diff-type={block.type === "removed" ? "removed" : block.type === "added" ? "added" : ""}
+              />
+            ))}
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}
+
+// const testDiff = `--- combined_before.txt	2025-06-24 16:38:08
+// +++ combined_after.txt	2025-06-24 16:38:12
+// @@ -1,21 +1,25 @@
+//  unchanged line
+// -deleted line
+// -old content
+// +added line
+// +new content
+//
+// -removed empty line below
+// +added empty line above
+//
+// -	tab indented
+// -trailing spaces
+// -very long line that will definitely wrap in most editors and cause potential alignment issues when displayed in a two column diff view
+// -unicode content: 🚀 ✨ 中文
+// -mixed	content with	tabs and spaces
+// +    space indented
+// +no trailing spaces
+// +short line
+// +very long replacement line that will also wrap and test how the diff viewer handles long line additions after short line removals
+// +different unicode: 🎉 💻 日本語
+// +normalized content with consistent spacing
+// +newline to content
+//
+// -content to remove
+// -whitespace only:
+// -multiple
+// -consecutive
+// -deletions
+// -single deletion
+// +
+// +single addition
+// +first addition
+// +second addition
+// +third addition
+//  line before addition
+// +first added line
+// +
+// +third added line
+//  line after addition
+//  final unchanged line`
diff --git a/packages/web/src/components/share/content-markdown.module.css b/packages/web/src/components/share/content-markdown.module.css
new file mode 100644
index 000000000..da1aa1128
--- /dev/null
+++ b/packages/web/src/components/share/content-markdown.module.css
@@ -0,0 +1,140 @@
+.root {
+  border: 1px solid var(--sl-color-blue-high);
+  padding: 0.5rem calc(0.5rem + 3px);
+  border-radius: 0.25rem;
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 1rem;
+  align-self: flex-start;
+  max-width: var(--md-tool-width);
+
+  &[data-highlight="true"] {
+    background-color: var(--sl-color-blue-low);
+  }
+
+  [data-slot="expand-button"] {
+    flex: 0 0 auto;
+    padding: 2px 0;
+    font-size: 0.75rem;
+  }
+
+  [data-slot="markdown"] {
+    display: -webkit-box;
+    -webkit-box-orient: vertical;
+    -webkit-line-clamp: 3;
+    line-clamp: 3;
+    overflow: hidden;
+
+    [data-expanded] & {
+      display: block;
+    }
+
+    font-size: 0.875rem;
+    line-height: 1.5;
+
+    p,
+    blockquote,
+    ul,
+    ol,
+    dl,
+    table,
+    pre {
+      margin-bottom: 1rem;
+    }
+
+    strong {
+      font-weight: 600;
+    }
+
+    ol {
+      list-style-position: inside;
+      padding-left: 0.75rem;
+    }
+
+    ul {
+      padding-left: 1.5rem;
+    }
+
+    h1,
+    h2,
+    h3,
+    h4,
+    h5,
+    h6 {
+      font-size: 0.875rem;
+      font-weight: 600;
+      margin-bottom: 0.5rem;
+    }
+
+    & > *:last-child {
+      margin-bottom: 0;
+    }
+
+    pre {
+      --shiki-dark-bg: var(--sl-color-bg-surface) !important;
+      background-color: var(--sl-color-bg-surface) !important;
+      padding: 0.5rem 0.75rem;
+      line-height: 1.6;
+      font-size: 0.75rem;
+      white-space: pre-wrap;
+      word-break: break-word;
+
+      span {
+        white-space: break-spaces;
+      }
+    }
+
+    code {
+      font-weight: 500;
+
+      &:not(pre code) {
+        &::before {
+          content: "`";
+          font-weight: 700;
+        }
+
+        &::after {
+          content: "`";
+          font-weight: 700;
+        }
+      }
+    }
+
+    table {
+      border-collapse: collapse;
+      width: 100%;
+    }
+
+    th,
+    td {
+      border: 1px solid var(--sl-color-border);
+      padding: 0.5rem 0.75rem;
+      text-align: left;
+    }
+
+    th {
+      border-bottom: 1px solid var(--sl-color-border);
+    }
+
+    /* Remove outer borders */
+    table tr:first-child th,
+    table tr:first-child td {
+      border-top: none;
+    }
+
+    table tr:last-child td {
+      border-bottom: none;
+    }
+
+    table th:first-child,
+    table td:first-child {
+      border-left: none;
+    }
+
+    table th:last-child,
+    table td:last-child {
+      border-right: none;
+    }
+  }
+}
diff --git a/packages/web/src/components/share/content-markdown.tsx b/packages/web/src/components/share/content-markdown.tsx
new file mode 100644
index 000000000..f79271296
--- /dev/null
+++ b/packages/web/src/components/share/content-markdown.tsx
@@ -0,0 +1,65 @@
+import style from "./content-markdown.module.css"
+import { createResource, createSignal } from "solid-js"
+import { createOverflow } from "./common"
+import { transformerNotationDiff } from "@shikijs/transformers"
+import { marked } from "marked"
+import markedShiki from "marked-shiki"
+import { codeToHtml } from "shiki"
+
+const markedWithShiki = marked.use(
+  markedShiki({
+    highlight(code, lang) {
+      return codeToHtml(code, {
+        lang: lang || "text",
+        themes: {
+          light: "github-light",
+          dark: "github-dark",
+        },
+        transformers: [transformerNotationDiff()],
+      })
+    },
+  }),
+)
+
+interface Props {
+  text: string
+  expand?: boolean
+  highlight?: boolean
+}
+export function ContentMarkdown(props: Props) {
+  const [html] = createResource(
+    () => strip(props.text),
+    async (markdown) => {
+      return markedWithShiki.parse(markdown)
+    },
+  )
+  const [expanded, setExpanded] = createSignal(false)
+  const overflow = createOverflow()
+
+  return (
+    <div
+      class={style.root}
+      data-highlight={props.highlight === true ? true : undefined}
+      data-expanded={expanded() || props.expand === true ? true : undefined}
+    >
+      <div data-slot="markdown" ref={overflow.ref} innerHTML={html()} />
+
+      {!props.expand && overflow.status && (
+        <button
+          type="button"
+          data-component="text-button"
+          data-slot="expand-button"
+          onClick={() => setExpanded((e) => !e)}
+        >
+          {expanded() ? "Show less" : "Show more"}
+        </button>
+      )}
+    </div>
+  )
+}
+
+function strip(text: string): string {
+  const wrappedRe = /^\s*<([A-Za-z]\w*)>\s*([\s\S]*?)\s*<\/\1>\s*$/
+  const match = text.match(wrappedRe)
+  return match ? match[2] : text
+}
diff --git a/packages/web/src/components/share/content-text.module.css b/packages/web/src/components/share/content-text.module.css
new file mode 100644
index 000000000..f8d0b0b93
--- /dev/null
+++ b/packages/web/src/components/share/content-text.module.css
@@ -0,0 +1,57 @@
+.root {
+  color: var(--sl-color-text);
+  background-color: var(--sl-color-bg-surface);
+  padding: 0.5rem calc(0.5rem + 3px);
+  border-radius: 0.25rem;
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 1rem;
+  align-self: flex-start;
+  max-width: var(--md-tool-width);
+  font-size: 0.875rem;
+
+  &[data-compact] {
+    font-size: 0.75rem;
+    color: var(--sl-color-text-dimmed);
+  }
+
+  [data-slot="text"] {
+    line-height: 1.5;
+    white-space: pre-wrap;
+    overflow-wrap: anywhere;
+    display: -webkit-box;
+    -webkit-box-orient: vertical;
+    -webkit-line-clamp: 3;
+    line-clamp: 3;
+    overflow: hidden;
+
+    [data-expanded] & {
+      display: block;
+    }
+  }
+
+  [data-slot="expand-button"] {
+    flex: 0 0 auto;
+    padding: 2px 0;
+    font-size: 0.75rem;
+  }
+
+  &[data-theme="invert"] {
+    background-color: var(--sl-color-blue-high);
+    color: var(--sl-color-text-invert);
+
+    [data-slot="expand-button"] {
+      opacity: 0.85;
+      color: var(--sl-color-text-invert);
+
+      &:hover {
+        opacity: 1;
+      }
+    }
+  }
+
+  &[data-theme="blue"] {
+    background-color: var(--sl-color-blue-low);
+  }
+}
diff --git a/packages/web/src/components/share/content-text.tsx b/packages/web/src/components/share/content-text.tsx
new file mode 100644
index 000000000..c52e0dfcc
--- /dev/null
+++ b/packages/web/src/components/share/content-text.tsx
@@ -0,0 +1,35 @@
+import style from "./content-text.module.css"
+import { createSignal } from "solid-js"
+import { createOverflow } from "./common"
+
+interface Props {
+  text: string
+  expand?: boolean
+  compact?: boolean
+}
+export function ContentText(props: Props) {
+  const [expanded, setExpanded] = createSignal(false)
+  const overflow = createOverflow()
+
+  return (
+    <div
+      class={style.root}
+      data-expanded={expanded() || props.expand === true ? true : undefined}
+      data-compact={props.compact === true ? true : undefined}
+    >
+      <pre data-slot="text" ref={overflow.ref}>
+        {props.text}
+      </pre>
+      {((!props.expand && overflow.status) || expanded()) && (
+        <button
+          type="button"
+          data-component="text-button"
+          data-slot="expand-button"
+          onClick={() => setExpanded((e) => !e)}
+        >
+          {expanded() ? "Show less" : "Show more"}
+        </button>
+      )}
+    </div>
+  )
+}
diff --git a/packages/web/src/components/share/part.module.css b/packages/web/src/components/share/part.module.css
new file mode 100644
index 000000000..9145cddf7
--- /dev/null
+++ b/packages/web/src/components/share/part.module.css
@@ -0,0 +1,375 @@
+.root {
+  display: flex;
+  gap: 0.625rem;
+
+  [data-component="decoration"] {
+    flex: 0 0 auto;
+    display: flex;
+    flex-direction: column;
+    gap: 0.625rem;
+    align-items: center;
+    justify-content: flex-start;
+
+    [data-slot="anchor"] {
+      position: relative;
+
+      a:first-child {
+        display: block;
+        flex: 0 0 auto;
+        width: 18px;
+        opacity: 0.65;
+
+        svg {
+          color: var(--sl-color-text-secondary);
+          display: block;
+
+          &:nth-child(3) {
+            color: var(--sl-color-green-high);
+          }
+        }
+
+        svg:nth-child(2),
+        svg:nth-child(3) {
+          display: none;
+        }
+
+        &:hover {
+          svg:nth-child(1) {
+            display: none;
+          }
+
+          svg:nth-child(2) {
+            display: block;
+          }
+        }
+      }
+
+      [data-copied] & {
+        a,
+        a:hover {
+          svg:nth-child(1),
+          svg:nth-child(2) {
+            display: none;
+          }
+
+          svg:nth-child(3) {
+            display: block;
+          }
+        }
+      }
+    }
+
+    [data-slot="bar"] {
+      width: 3px;
+      height: 100%;
+      border-radius: 1px;
+      background-color: var(--sl-color-hairline);
+    }
+
+    [data-slot="tooltip"] {
+      position: absolute;
+      top: 50%;
+      left: calc(100% + 12px);
+      transform: translate(0, -50%);
+      line-height: 1.1;
+      padding: 0.375em 0.5em calc(0.375em + 2px);
+      background: var(--sl-color-white);
+      color: var(--sl-color-text-invert);
+      font-size: 0.6875rem;
+      border-radius: 7px;
+      white-space: nowrap;
+
+      z-index: 1;
+      opacity: 0;
+      visibility: hidden;
+
+      &::after {
+        content: "";
+        position: absolute;
+        top: 50%;
+        left: -15px;
+        transform: translateY(-50%);
+        border: 8px solid transparent;
+        border-right-color: var(--sl-color-white);
+      }
+
+      [data-copied] & {
+        opacity: 1;
+        visibility: visible;
+      }
+    }
+  }
+
+  [data-component="content"] {
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+    flex-grow: 1;
+  }
+
+  [data-component="spacer"] {
+    height: 0rem;
+  }
+
+  [data-component="content-footer"] {
+    align-self: flex-start;
+    font-size: 0.75rem;
+    color: var(--sl-color-text-dimmed);
+  }
+
+  [data-component="step-start"] {
+    display: flex;
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.375rem;
+    padding-bottom: 1rem;
+
+    [data-slot="provider"] {
+      line-height: 18px;
+      font-size: 0.875rem;
+      text-transform: uppercase;
+      letter-spacing: -0.5px;
+      color: var(--sl-color-text-secondary);
+    }
+
+    [data-slot="model"] {
+      line-height: 1.5;
+    }
+  }
+
+  [data-component="button-text"] {
+    cursor: pointer;
+    appearance: none;
+    background-color: transparent;
+    border: none;
+    padding: 0;
+    color: var(--sl-color-text-secondary);
+    font-size: 0.75rem;
+
+    &:hover {
+      color: var(--sl-color-text);
+    }
+
+    &[data-more] {
+      display: flex;
+      align-items: center;
+      gap: 0.125rem;
+
+      span[data-slot="icon"] {
+        line-height: 1;
+        opacity: 0.85;
+
+        svg {
+          display: block;
+        }
+      }
+    }
+  }
+
+  [data-component="tool"] {
+    display: flex;
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.375rem;
+    padding-bottom: 1rem;
+  }
+
+  [data-component="tool-title"] {
+    line-height: 18px;
+    font-size: 0.875rem;
+    color: var(--sl-color-text-secondary);
+    max-width: var(--md-tool-width);
+    display: flex;
+    align-items: flex-start;
+    gap: 0.375rem;
+
+    [data-slot="name"] {
+      text-transform: uppercase;
+      letter-spacing: -0.5px;
+    }
+
+    [data-slot="target"] {
+      color: var(--sl-color-text);
+      word-break: break-all;
+      font-weight: 500;
+    }
+  }
+
+  [data-component="tool-result"] {
+    display: flex;
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.5rem;
+  }
+
+  [data-component="todos"] {
+    list-style-type: none;
+    padding: 0;
+    margin: 0;
+    width: 100%;
+    max-width: var(--sm-tool-width);
+    border: 1px solid var(--sl-color-divider);
+    border-radius: 0.25rem;
+
+    [data-slot="item"] {
+      margin: 0;
+      position: relative;
+      padding-left: 1.5rem;
+      font-size: 0.75rem;
+      padding: 0.375rem 0.625rem 0.375rem 1.75rem;
+      border-bottom: 1px solid var(--sl-color-divider);
+      line-height: 1.5;
+      word-break: break-word;
+
+      &:last-child {
+        border-bottom: none;
+      }
+
+      & > span {
+        position: absolute;
+        display: inline-block;
+        left: 0.5rem;
+        top: calc(0.5rem + 1px);
+        width: 0.75rem;
+        height: 0.75rem;
+        border: 1px solid var(--sl-color-divider);
+        border-radius: 0.15rem;
+
+        &::before {
+        }
+      }
+
+      &[data-status="pending"] {
+        color: var(--sl-color-text);
+      }
+
+      &[data-status="in_progress"] {
+        color: var(--sl-color-text);
+
+        & > span {
+          border-color: var(--sl-color-orange);
+        }
+
+        & > span::before {
+          content: "";
+          position: absolute;
+          top: 2px;
+          left: 2px;
+          width: calc(0.75rem - 2px - 4px);
+          height: calc(0.75rem - 2px - 4px);
+          box-shadow: inset 1rem 1rem var(--sl-color-orange-low);
+        }
+      }
+
+      &[data-status="completed"] {
+        color: var(--sl-color-text-secondary);
+
+        & > span {
+          border-color: var(--sl-color-green-low);
+        }
+
+        & > span::before {
+          content: "";
+          position: absolute;
+          top: 2px;
+          left: 2px;
+          width: calc(0.75rem - 2px - 4px);
+          height: calc(0.75rem - 2px - 4px);
+          box-shadow: inset 1rem 1rem var(--sl-color-green);
+
+          transform-origin: bottom left;
+          clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
+        }
+      }
+    }
+  }
+
+  [data-component="terminal"] {
+    width: 100%;
+    max-width: var(--sm-tool-width);
+
+    [data-slot="body"] {
+      display: flex;
+      flex-direction: column;
+      border: 1px solid var(--sl-color-divider);
+      border-radius: 0.25rem;
+      overflow: hidden;
+    }
+
+    [data-slot="header"] {
+      position: relative;
+      border-bottom: 1px solid var(--sl-color-divider);
+      width: 100%;
+      height: 1.625rem;
+      text-align: center;
+      padding: 0 3.25rem;
+
+      > span {
+        max-width: min(100%, 140ch);
+        display: inline-block;
+        white-space: nowrap;
+        overflow: hidden;
+        line-height: 1.625rem;
+        font-size: 0.75rem;
+        text-overflow: ellipsis;
+        color: var(--sl-color-text-dimmed);
+      }
+
+      &::before {
+        content: "";
+        position: absolute;
+        pointer-events: none;
+        top: 8px;
+        left: 10px;
+        width: 2rem;
+        height: 0.5rem;
+        line-height: 0;
+        background-color: var(--sl-color-hairline);
+        mask-image: var(--term-icon);
+        mask-repeat: no-repeat;
+      }
+    }
+
+    [data-slot="content"] {
+      display: flex;
+      flex-direction: column;
+      padding: 0.5rem calc(0.5rem + 3px);
+
+      pre {
+        --shiki-dark-bg: var(--sl-color-bg) !important;
+        background-color: var(--sl-color-bg) !important;
+        line-height: 1.6;
+        font-size: 0.75rem;
+        white-space: pre-wrap;
+        word-break: break-word;
+      }
+    }
+  }
+
+  [data-component="tool-args"] {
+    display: inline-grid;
+    align-items: center;
+    grid-template-columns: max-content max-content minmax(0, 1fr);
+    max-width: var(--md-tool-width);
+    gap: 0.25rem 0.375rem;
+
+    & > div:nth-child(3n + 1) {
+      width: 8px;
+      height: 2px;
+      border-radius: 1px;
+      background: var(--sl-color-divider);
+    }
+
+    & > div:nth-child(3n + 2),
+    & > div:nth-child(3n + 3) {
+      font-size: 0.75rem;
+      line-height: 1.5;
+    }
+
+    & > div:nth-child(3n + 3) {
+      padding-left: 0.125rem;
+      word-break: break-word;
+      color: var(--sl-color-text-secondary);
+    }
+  }
+}
diff --git a/packages/web/src/components/share/part.tsx b/packages/web/src/components/share/part.tsx
new file mode 100644
index 000000000..3ee2c61a3
--- /dev/null
+++ b/packages/web/src/components/share/part.tsx
@@ -0,0 +1,664 @@
+import { createMemo, createSignal, For, Match, Show, Switch, type JSX, type ParentProps } from "solid-js"
+import {
+  IconCheckCircle,
+  IconChevronDown,
+  IconChevronRight,
+  IconHashtag,
+  IconSparkles,
+  IconGlobeAlt,
+  IconDocument,
+  IconQueueList,
+  IconCommandLine,
+  IconDocumentPlus,
+  IconPencilSquare,
+  IconRectangleStack,
+  IconMagnifyingGlass,
+  IconDocumentMagnifyingGlass,
+} from "../icons"
+import styles from "./part.module.css"
+import type { MessageV2 } from "opencode/session/message-v2"
+import { ContentText } from "./content-text"
+import { ContentMarkdown } from "./content-markdown"
+import { DateTime } from "luxon"
+import CodeBlock from "../CodeBlock"
+import map from "lang-map"
+import type { Diagnostic } from "vscode-languageserver-types"
+
+import { ContentCode } from "./content-code"
+import { ContentDiff } from "./content-diff"
+
+export interface PartProps {
+  index: number
+  message: MessageV2.Info
+  part: MessageV2.AssistantPart | MessageV2.UserPart
+  last: boolean
+}
+
+export function Part(props: PartProps) {
+  const [copied, setCopied] = createSignal(false)
+  const id = createMemo(() => props.message.id + "-" + props.index)
+
+  return (
+    <div
+      class={styles.root}
+      id={id()}
+      data-component="part"
+      data-type={props.part.type}
+      data-role={props.message.role}
+      data-copied={copied() ? true : undefined}
+    >
+      <div data-component="decoration">
+        <div data-slot="anchor" title="Link to this message">
+          <a
+            href={`#${id()}`}
+            onClick={(e) => {
+              e.preventDefault()
+              const anchor = e.currentTarget
+              const hash = anchor.getAttribute("href") || ""
+              const { origin, pathname, search } = window.location
+              navigator.clipboard
+                .writeText(`${origin}${pathname}${search}${hash}`)
+                .catch((err) => console.error("Copy failed", err))
+
+              setCopied(true)
+              setTimeout(() => setCopied(false), 3000)
+            }}
+          >
+            <Switch>
+              <Match when={props.part.type === "tool" && props.part.tool === "todowrite"}>
+                <IconQueueList width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "todoread"}>
+                <IconQueueList width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "bash"}>
+                <IconCommandLine width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "edit"}>
+                <IconPencilSquare width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "write"}>
+                <IconDocumentPlus width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "read"}>
+                <IconDocument width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "grep"}>
+                <IconDocumentMagnifyingGlass width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "list"}>
+                <IconRectangleStack width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "glob"}>
+                <IconMagnifyingGlass width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "webfetch"}>
+                <IconGlobeAlt width={18} height={18} />
+              </Match>
+              <Match when={props.part.type === "tool" && props.part.tool === "task"}>
+                <IconRectangleStack width={18} height={18} />
+              </Match>
+              <Match when={true}>
+                <IconSparkles width={18} height={18} />
+              </Match>
+            </Switch>
+            <IconHashtag width={18} height={18} />
+            <IconCheckCircle width={18} height={18} />
+          </a>
+          <span data-slot="tooltip">Copied!</span>
+        </div>
+        <div data-slot="bar"></div>
+      </div>
+      <div data-component="content">
+        {props.message.role === "user" && props.part.type === "text" && (
+          <>
+            <ContentText text={props.part.text} expand={props.last} /> <Spacer />
+          </>
+        )}
+        {props.message.role === "assistant" && props.part.type === "text" && (
+          <>
+            <ContentMarkdown expand={props.last} text={props.part.text} />
+            {props.last && props.message.role === "assistant" && props.message.time.completed && (
+              <Footer
+                title={DateTime.fromMillis(props.message.time.completed).toLocaleString(
+                  DateTime.DATETIME_FULL_WITH_SECONDS,
+                )}
+              >
+                {DateTime.fromMillis(props.message.time.completed).toLocaleString(DateTime.DATETIME_MED)}
+              </Footer>
+            )}
+            <Spacer />
+          </>
+        )}
+        {props.part.type === "step-start" && props.message.role === "assistant" && (
+          <div data-component="step-start">
+            <div data-slot="provider">{props.message.providerID}</div>
+            <div data-slot="model">{props.message.modelID}</div>
+          </div>
+        )}
+        {props.part.type === "tool" &&
+          props.part.state.status === "completed" &&
+          props.message.role === "assistant" && (
+            <div data-component="tool" data-tool={props.part.tool}>
+              <Switch>
+                <Match when={props.part.tool === "grep"}>
+                  <GrepTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "glob"}>
+                  <GlobTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "list"}>
+                  <ListTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "read"}>
+                  <ReadTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "write"}>
+                  <WriteTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "edit"}>
+                  <EditTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "bash"}>
+                  <BashTool
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                    message={props.message}
+                  />
+                </Match>
+                <Match when={props.part.tool === "todowrite"}>
+                  <TodoWriteTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={props.part.tool === "webfetch"}>
+                  <WebFetchTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+                <Match when={true}>
+                  <FallbackTool
+                    message={props.message}
+                    id={props.part.id}
+                    tool={props.part.tool}
+                    state={props.part.state}
+                  />
+                </Match>
+              </Switch>
+            </div>
+          )}
+      </div>
+    </div>
+  )
+}
+
+type ToolProps = {
+  id: MessageV2.ToolPart["id"]
+  tool: MessageV2.ToolPart["tool"]
+  state: MessageV2.ToolStateCompleted
+  message: MessageV2.Assistant
+  isLastPart?: boolean
+}
+
+interface Todo {
+  id: string
+  content: string
+  status: "pending" | "in_progress" | "completed"
+  priority: "low" | "medium" | "high"
+}
+
+function stripWorkingDirectory(filePath?: string, workingDir?: string) {
+  if (filePath === undefined || workingDir === undefined) return filePath
+
+  const prefix = workingDir.endsWith("/") ? workingDir : workingDir + "/"
+
+  if (filePath === workingDir) {
+    return ""
+  }
+
+  if (filePath.startsWith(prefix)) {
+    return filePath.slice(prefix.length)
+  }
+
+  return filePath
+}
+
+function getShikiLang(filename: string) {
+  const ext = filename.split(".").pop()?.toLowerCase() ?? ""
+  const langs = map.languages(ext)
+  const type = langs?.[0]?.toLowerCase()
+
+  const overrides: Record<string, string> = {
+    conf: "shellscript",
+  }
+
+  return type ? (overrides[type] ?? type) : "plaintext"
+}
+
+function getDiagnostics(diagnosticsByFile: Record<string, Diagnostic[]>, currentFile: string): JSX.Element[] {
+  const result: JSX.Element[] = []
+
+  if (diagnosticsByFile === undefined || diagnosticsByFile[currentFile] === undefined) return result
+
+  for (const diags of Object.values(diagnosticsByFile)) {
+    for (const d of diags) {
+      if (d.severity !== 1) continue
+
+      const line = d.range.start.line + 1
+      const column = d.range.start.character + 1
+
+      result.push(
+        <pre>
+          <span data-color="red" data-marker="label">
+            Error
+          </span>
+          <span data-color="dimmed" data-separator>
+            [{line}:{column}]
+          </span>
+          <span>{d.message}</span>
+        </pre>,
+      )
+    }
+  }
+
+  return result
+}
+
+function formatErrorString(error: string): JSX.Element {
+  const errorMarker = "Error: "
+  const startsWithError = error.startsWith(errorMarker)
+
+  return startsWithError ? (
+    <pre>
+      <span data-color="red" data-marker="label" data-separator>
+        Error
+      </span>
+      <span>{error.slice(errorMarker.length)}</span>
+    </pre>
+  ) : (
+    <pre>
+      <span data-color="dimmed">{error}</span>
+    </pre>
+  )
+}
+
+export function TodoWriteTool(props: ToolProps) {
+  const priority: Record<Todo["status"], number> = {
+    in_progress: 0,
+    pending: 1,
+    completed: 2,
+  }
+  const todos = createMemo(() =>
+    ((props.state.input?.todos ?? []) as Todo[]).slice().sort((a, b) => priority[a.status] - priority[b.status]),
+  )
+  const starting = () => todos().every((t: Todo) => t.status === "pending")
+  const finished = () => todos().every((t: Todo) => t.status === "completed")
+
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">
+          <Switch fallback="Updating plan">
+            <Match when={starting()}>Creating plan</Match>
+            <Match when={finished()}>Completing plan</Match>
+          </Switch>
+        </span>
+      </div>
+      <Show when={todos().length > 0}>
+        <ul data-component="todos">
+          <For each={todos()}>
+            {(todo) => (
+              <li data-slot="item" data-status={todo.status}>
+                <span></span>
+                {todo.content}
+              </li>
+            )}
+          </For>
+        </ul>
+      </Show>
+    </>
+  )
+}
+
+export function GrepTool(props: ToolProps) {
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">Grep</span>
+        <span data-slot="target">&ldquo;{props.state.input.pattern}&rdquo;</span>
+      </div>
+      <div data-component="tool-result">
+        <Switch>
+          <Match when={props.state.metadata?.matches && props.state.metadata?.matches > 0}>
+            <ResultsButton
+              showCopy={props.state.metadata?.matches === 1 ? "1 match" : `${props.state.metadata?.matches} matches`}
+            >
+              <ContentText expand compact text={props.state.output} />
+            </ResultsButton>
+          </Match>
+          <Match when={props.state.output}>
+            <ContentText expand compact text={props.state.output} data-size="sm" data-color="dimmed" />
+          </Match>
+        </Switch>
+      </div>
+    </>
+  )
+}
+
+export function ListTool(props: ToolProps) {
+  const path = createMemo(() =>
+    props.state.input?.path !== props.message.path.cwd
+      ? stripWorkingDirectory(props.state.input?.path, props.message.path.cwd)
+      : props.state.input?.path,
+  )
+
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">LS</span>
+        <span data-slot="target" title={props.state.input?.path}>
+          {path()}
+        </span>
+      </div>
+      <div data-component="tool-result">
+        <Switch>
+          <Match when={props.state.output}>
+            <ResultsButton>
+              <ContentText expand compact text={props.state.output} />
+            </ResultsButton>
+          </Match>
+        </Switch>
+      </div>
+    </>
+  )
+}
+
+export function WebFetchTool(props: ToolProps) {
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">Fetch</span>
+        <span data-slot="target">{props.state.input.url}</span>
+      </div>
+      <div data-component="tool-result">
+        <Switch>
+          <Match when={props.state.metadata?.error}>
+            <div data-component="error">{formatErrorString(props.state.output)}</div>
+          </Match>
+          <Match when={props.state.output}>
+            <ResultsButton>
+              <CodeBlock lang={props.state.input.format || "text"} code={props.state.output} />
+            </ResultsButton>
+          </Match>
+        </Switch>
+      </div>
+    </>
+  )
+}
+
+export function ReadTool(props: ToolProps) {
+  const filePath = createMemo(() => stripWorkingDirectory(props.state.input?.filePath, props.message.path.cwd))
+
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">Read</span>
+        <span data-slot="target" title={props.state.input?.filePath}>
+          {filePath()}
+        </span>
+      </div>
+      <div data-component="tool-result">
+        <Switch>
+          <Match when={props.state.metadata?.error}>
+            <div data-component="error">{formatErrorString(props.state.output)}</div>
+          </Match>
+          <Match when={typeof props.state.metadata?.preview === "string"}>
+            <ResultsButton showCopy="Show preview" hideCopy="Hide preview">
+              <ContentCode lang={getShikiLang(filePath() || "")} code={props.state.metadata?.preview} />
+            </ResultsButton>
+          </Match>
+          <Match when={typeof props.state.metadata?.preview !== "string" && props.state.output}>
+            <ResultsButton>
+              <ContentText expand compact text={props.state.output} />
+            </ResultsButton>
+          </Match>
+        </Switch>
+      </div>
+    </>
+  )
+}
+
+export function WriteTool(props: ToolProps) {
+  const filePath = createMemo(() => stripWorkingDirectory(props.state.input?.filePath, props.message.path.cwd))
+  const diagnostics = createMemo(() => getDiagnostics(props.state.metadata?.diagnostics, props.state.input.filePath))
+
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">Write</span>
+        <span data-slot="target" title={props.state.input?.filePath}>
+          {filePath()}
+        </span>
+      </div>
+      <Show when={diagnostics().length > 0}>
+        <div data-component="error">{diagnostics()}</div>
+      </Show>
+      <div data-component="tool-result">
+        <Switch>
+          <Match when={props.state.metadata?.error}>
+            <div data-component="error">{formatErrorString(props.state.output)}</div>
+          </Match>
+          <Match when={props.state.input?.content}>
+            <ResultsButton showCopy="Show contents" hideCopy="Hide contents">
+              <ContentCode lang={getShikiLang(filePath() || "")} code={props.state.input?.content} />
+            </ResultsButton>
+          </Match>
+        </Switch>
+      </div>
+    </>
+  )
+}
+
+export function EditTool(props: ToolProps) {
+  const filePath = createMemo(() => stripWorkingDirectory(props.state.input.filePath, props.message.path.cwd))
+  const diagnostics = createMemo(() => getDiagnostics(props.state.metadata?.diagnostics, props.state.input.filePath))
+
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">Edit</span>
+        <span data-slot="target" title={props.state.input?.filePath}>
+          {filePath()}
+        </span>
+      </div>
+      <div data-component="tool-result">
+        <Switch>
+          <Match when={props.state.metadata?.error}>
+            <div data-component="error">{formatErrorString(props.state.metadata?.message || "")}</div>
+          </Match>
+          <Match when={props.state.metadata?.diff}>
+            <div data-component="diff">
+              <ContentDiff diff={props.state.metadata?.diff} lang={getShikiLang(filePath() || "")} />
+            </div>
+          </Match>
+        </Switch>
+      </div>
+      <Show when={diagnostics().length > 0}>
+        <div data-component="error">{diagnostics()}</div>
+      </Show>
+    </>
+  )
+}
+
+export function BashTool(props: ToolProps) {
+  return (
+    <>
+      <div data-component="terminal" data-size="sm">
+        <div data-slot="body">
+          <div data-slot="header">
+            <span>{props.state.metadata.description}</span>
+          </div>
+          <div data-slot="content">
+            <ContentCode flush lang="bash" code={props.state.input.command} />
+            <ContentCode flush lang="console" code={props.state.metadata?.stdout || ""} />
+          </div>
+        </div>
+      </div>
+    </>
+  )
+}
+
+export function GlobTool(props: ToolProps) {
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">Glob</span>
+        <span data-slot="target">&ldquo;{props.state.input.pattern}&rdquo;</span>
+      </div>
+      <Switch>
+        <Match when={props.state.metadata?.count && props.state.metadata?.count > 0}>
+          <div data-component="tool-result">
+            <ResultsButton
+              showCopy={props.state.metadata?.count === 1 ? "1 result" : `${props.state.metadata?.count} results`}
+            >
+              <ContentText expand compact text={props.state.output} />
+            </ResultsButton>
+          </div>
+        </Match>
+        <Match when={props.state.output}>
+          <ContentText expand text={props.state.output} data-size="sm" data-color="dimmed" />
+        </Match>
+      </Switch>
+    </>
+  )
+}
+
+interface ResultsButtonProps extends ParentProps {
+  showCopy?: string
+  hideCopy?: string
+}
+function ResultsButton(props: ResultsButtonProps) {
+  const [show, setShow] = createSignal(false)
+
+  return (
+    <>
+      <button type="button" data-component="button-text" data-more onClick={() => setShow((e) => !e)}>
+        <span>{show() ? props.hideCopy || "Hide results" : props.showCopy || "Show results"}</span>
+        <span data-slot="icon">
+          <Show when={show()} fallback={<IconChevronRight width={11} height={11} />}>
+            <IconChevronDown width={11} height={11} />
+          </Show>
+        </span>
+      </button>
+      <Show when={show()}>{props.children}</Show>
+    </>
+  )
+}
+
+export function Spacer() {
+  return <div data-component="spacer"></div>
+}
+
+function Footer(props: ParentProps<{ title: string }>) {
+  return (
+    <div data-component="content-footer" title={props.title}>
+      {props.children}
+    </div>
+  )
+}
+
+export function FallbackTool(props: ToolProps) {
+  return (
+    <>
+      <div data-component="tool-title">
+        <span data-slot="name">{props.tool}</span>
+      </div>
+      <div data-component="tool-args">
+        <For each={flattenToolArgs(props.state.input)}>
+          {(arg) => (
+            <>
+              <div></div>
+              <div>{arg[0]}</div>
+              <div>{arg[1]}</div>
+            </>
+          )}
+        </For>
+      </div>
+      <Switch>
+        <Match when={props.state.output}>
+          <div data-component="tool-result">
+            <ResultsButton>
+              <ContentText expand compact text={props.state.output} data-size="sm" data-color="dimmed" />
+            </ResultsButton>
+          </div>
+        </Match>
+      </Switch>
+    </>
+  )
+}
+
+// Converts nested objects/arrays into [path, value] pairs.
+// E.g. {a:{b:{c:1}}, d:[{e:2}, 3]} => [["a.b.c",1], ["d[0].e",2], ["d[1]",3]]
+function flattenToolArgs(obj: any, prefix: string = ""): Array<[string, any]> {
+  const entries: Array<[string, any]> = []
+
+  for (const [key, value] of Object.entries(obj)) {
+    const path = prefix ? `${prefix}.${key}` : key
+
+    if (value !== null && typeof value === "object") {
+      if (Array.isArray(value)) {
+        value.forEach((item, index) => {
+          const arrayPath = `${path}[${index}]`
+          if (item !== null && typeof item === "object") {
+            entries.push(...flattenToolArgs(item, arrayPath))
+          } else {
+            entries.push([arrayPath, item])
+          }
+        })
+      } else {
+        entries.push(...flattenToolArgs(value, path))
+      }
+    } else {
+      entries.push([path, value])
+    }
+  }
+
+  return entries
+}