diff --git a/.changeset/review-diff-row-height.md b/.changeset/review-diff-row-height.md
new file mode 100644
index 00000000000..a614114c2af
--- /dev/null
+++ b/.changeset/review-diff-row-height.md
@@ -0,0 +1,5 @@
+---
+"kilo-code": patch
+---
+
+Keep large review diffs from jumping when file rows are re-created at a different panel width.
diff --git a/.changeset/vscode-paste-collapse.md b/.changeset/vscode-paste-collapse.md
new file mode 100644
index 00000000000..7894a70847c
--- /dev/null
+++ b/.changeset/vscode-paste-collapse.md
@@ -0,0 +1,5 @@
+---
+"kilo-code": minor
+---
+
+Show large pasted text in the prompt input as an expandable `[Pasted ~N lines]` block that restores the full text when expanded, copied, or sent.
diff --git a/packages/kilo-ui/src/components/diff.tsx b/packages/kilo-ui/src/components/diff.tsx
index fec13a8f530..ead27fa1779 100644
--- a/packages/kilo-ui/src/components/diff.tsx
+++ b/packages/kilo-ui/src/components/diff.tsx
@@ -40,8 +40,12 @@ function remember(key: object | undefined, width: number, height: number) {
 }
 
 function reserved(key: object | undefined, width: number) {
-  if (!key || width <= 0) return
-  return sizes.get(key)?.get(width)
+  if (!key) return undefined
+  const widths = sizes.get(key)
+  if (!widths) return undefined
+  // Preserve the last measured height at a new width. The capped estimate
+  // would shrink a tall remounted row and move the scroll position.
+  return widths.get(width) ?? Array.from(widths.values()).at(-1)
 }
 
 // A review can contain many expanded diff components. Creating one
diff --git a/packages/kilo-vscode/tests/diff-scroll-preservation.spec.ts b/packages/kilo-vscode/tests/diff-scroll-preservation.spec.ts
index 4d6bf0b5821..e38ff344e4d 100644
--- a/packages/kilo-vscode/tests/diff-scroll-preservation.spec.ts
+++ b/packages/kilo-vscode/tests/diff-scroll-preservation.spec.ts
@@ -370,6 +370,71 @@ test("keeps the inline diff position stable while scrolling upward", async ({ pa
   expect(result.range).toBeLessThanOrEqual(1)
 })
 
+test("keeps the inline diff position stable when the row width changes", async ({ page }) => {
+  await page.setViewportSize({ width: 900, height: 760 })
+  await page.goto(inlineStoryUrl(), { waitUntil: "load" })
+  await disableAnimations(page)
+  await page.waitForSelector(".am-diff-content diffs-container", { state: "attached" })
+
+  const scroll = page.locator(".am-diff-content")
+  // Materialize every row at the wider layout so each row records its height.
+  const mounted = await scroll.evaluate(async (el) => {
+    const frame = () => new Promise((resolve) => requestAnimationFrame(resolve))
+    const initial = Array.from(el.querySelectorAll("[data-file-path]"), (row) => row.getAttribute("data-file-path"))
+    while (el.scrollTop < el.scrollHeight - el.clientHeight - 1) {
+      el.scrollTop = Math.min(el.scrollHeight - el.clientHeight, el.scrollTop + 120)
+      await frame()
+    }
+    for (let index = 0; index < 30; index++) await frame()
+    return initial
+  })
+
+  // A width change (panel resize or scrollbar toggle) leaves the measured
+  // heights on a different width, so a remounted row must reuse the last
+  // measured height instead of collapsing to the capped estimate.
+  await page.setViewportSize({ width: 880, height: 760 })
+
+  const result = await scroll.evaluate(async (el, initial) => {
+    const frame = () => new Promise((resolve) => requestAnimationFrame(resolve))
+    const settle = async (count: number) => {
+      for (let index = 0; index < count; index++) await frame()
+    }
+    const seen = new Set(initial)
+    let remounts = 0
+    const observer = new MutationObserver((records) => {
+      for (const record of records) {
+        for (const node of record.addedNodes) {
+          if (!(node instanceof HTMLElement)) continue
+          const rows = node.matches("[data-file-path]") ? [node] : Array.from(node.querySelectorAll("[data-file-path]"))
+          for (const row of rows) {
+            const file = row.getAttribute("data-file-path")
+            if (seen.has(file)) remounts++
+            seen.add(file)
+          }
+        }
+      }
+    })
+    observer.observe(el, { childList: true, subtree: true })
+
+    let correction = 0
+    let range = 0
+    while (el.scrollTop > 0) {
+      const height = el.scrollHeight
+      const intended = Math.max(0, el.scrollTop - 80)
+      el.scrollTop = intended
+      await settle(2)
+      correction = Math.max(correction, Math.abs(el.scrollTop - intended))
+      range = Math.max(range, Math.abs(el.scrollHeight - height))
+    }
+    observer.disconnect()
+    return { correction, range, remounts }
+  }, mounted)
+
+  expect(result.remounts).toBeGreaterThan(0)
+  expect(result.correction).toBeLessThanOrEqual(1)
+  expect(result.range).toBeLessThanOrEqual(1)
+})
+
 test("keeps cached worktree reviews visible on every switch frame", async ({ page }) => {
   await page.setViewportSize({ width: 900, height: 760 })
   await page.goto(`/iframe.html?id=${CACHE_STORY_ID}&viewMode=story&globals=${GLOBALS}`, { waitUntil: "load" })
diff --git a/packages/kilo-vscode/tests/paste-collapse.spec.ts b/packages/kilo-vscode/tests/paste-collapse.spec.ts
new file mode 100644
index 00000000000..32e8d9c72c2
--- /dev/null
+++ b/packages/kilo-vscode/tests/paste-collapse.spec.ts
@@ -0,0 +1,55 @@
+import { expect, test, type Page } from "@playwright/test"
+
+const GLOBALS = "colorScheme:dark;theme:kilo-vscode;vscodeTheme:dark-modern"
+const PLACEHOLDER = "[Pasted ~15 lines]"
+
+async function open(page: Page) {
+  await page.goto(`/iframe.html?id=prompt-input--default-420&viewMode=story&globals=${GLOBALS}`, { waitUntil: "load" })
+  const input = page.locator("textarea.prompt-input")
+  await expect(input).toBeVisible()
+  await page.evaluate(() => window.postMessage({ type: "connectionState", state: "connected" }, window.origin))
+  await expect(input).toBeEnabled()
+  return input
+}
+
+function block(tag: string) {
+  return Array.from({ length: 15 }, (_, index) => `${tag}${index} ${"x".repeat(40)}`).join("\n")
+}
+
+async function paste(page: Page, input: ReturnType<Page["locator"]>, text: string) {
+  await page.evaluate(async (value) => navigator.clipboard.writeText(value), text)
+  await input.focus()
+  await page.keyboard.press("ControlOrMeta+V")
+}
+
+async function clickChip(page: Page, index = 0) {
+  await page.evaluate((at) => (document.querySelectorAll(".prompt-input-paste")[at] as HTMLElement).click(), index)
+}
+
+test("keeps the surviving paste chip and its backing after deleting an earlier chip", async ({ page }) => {
+  await page.context().grantPermissions(["clipboard-read", "clipboard-write"])
+  const input = await open(page)
+  const first = block("a")
+  const second = block("b")
+
+  await paste(page, input, first)
+  await paste(page, input, second)
+  await expect(page.locator(".prompt-input-paste")).toHaveCount(2)
+
+  // Delete the first chip from the caret at its end.
+  await page.evaluate(() => {
+    const field = document.querySelector("textarea.prompt-input") as HTMLTextAreaElement
+    const end = field.value.indexOf("[Pasted ~15 lines]") + "[Pasted ~15 lines]".length
+    field.focus()
+    field.setSelectionRange(end, end)
+  })
+  await input.press("Backspace")
+
+  // The edit must shift the remaining range once, so it stays a chip.
+  await expect(page.locator(".prompt-input-paste")).toHaveCount(1)
+  await expect(input).toHaveValue(PLACEHOLDER)
+
+  // And it must keep the second block's backing, not the deleted one's.
+  await clickChip(page)
+  await expect(input).toHaveValue(second)
+})
diff --git a/packages/kilo-vscode/tests/unit/prompt-input-connection-guard.test.ts b/packages/kilo-vscode/tests/unit/prompt-input-connection-guard.test.ts
index 2f70fea067f..e4ddc7e8999 100644
--- a/packages/kilo-vscode/tests/unit/prompt-input-connection-guard.test.ts
+++ b/packages/kilo-vscode/tests/unit/prompt-input-connection-guard.test.ts
@@ -67,6 +67,7 @@ describe("PromptInput sandbox toggle", () => {
     expect(move).toBeGreaterThan(save)
     expect(created).toContain("text: drafts,")
     expect(created).toContain("browsers: references,")
+    expect(created).toContain("pastes: pasteDrafts,")
     expect(created).toContain("contexts: contextDrafts,")
     expect(created).toContain("saveDraft(source, text(), reviewComments(), imageAttach.images())")
   })
@@ -78,7 +79,7 @@ describe("PromptInput sandbox toggle", () => {
     expect(src).toContain("if (highlightRef) highlightRef.scrollTop = scroll")
     expect(src).toContain("scrollDrafts.set(draftKey(), textareaRef.scrollTop)")
     expect(src).toContain(
-      "images: imageAttach.images(),\n    browsers: browsers(),\n    contexts: contexts(),\n    scroll: textareaRef?.scrollTop",
+      "images: imageAttach.images(),\n    browsers: browsers(),\n    pastes: paste.pastes().map((item) => item.text),\n    contexts: contexts(),\n    scroll: textareaRef?.scrollTop",
     )
     expect(src).toContain("draft.text,")
     expect(src).toContain("draft.comments,")
diff --git a/packages/kilo-vscode/tests/unit/prompt-input-utils.test.ts b/packages/kilo-vscode/tests/unit/prompt-input-utils.test.ts
index 3dc1cac87f3..dbb0f7d6a26 100644
--- a/packages/kilo-vscode/tests/unit/prompt-input-utils.test.ts
+++ b/packages/kilo-vscode/tests/unit/prompt-input-utils.test.ts
@@ -3,6 +3,7 @@ import {
   fileName,
   dirName,
   buildHighlightSegments,
+  buildPromptSegments,
   atEnd,
   insertSpacedText,
   isPromptBlocked,
@@ -13,6 +14,16 @@ import {
   applySandboxState,
   applySandboxStates,
   memoryRest,
+  promptLineCount,
+  isCollapsiblePaste,
+  pastePlaceholder,
+  findPastePlaceholders,
+  shiftPastes,
+  rebasePastes,
+  pasteInsertion,
+  expandPastes,
+  textDiff,
+  type PasteRange,
 } from "../../webview-ui/src/components/chat/prompt-input-utils"
 import { parseMemoryCommand } from "../../webview-ui/src/utils/memory-command"
 
@@ -361,3 +372,239 @@ describe("memoryRest", () => {
     expect(memoryRest(parseMemoryCommand("/memory auto on")!)).toBe("")
   })
 })
+
+describe("paste collapse thresholds", () => {
+  it("counts lines from newlines plus one", () => {
+    expect(promptLineCount("one")).toBe(1)
+    expect(promptLineCount("one\ntwo")).toBe(2)
+    expect(promptLineCount("a\nb\nc\nd\ne")).toBe(5)
+  })
+
+  it("collapses at fifteen lines or more than 4000 characters", () => {
+    expect(isCollapsiblePaste("a\nb\nc\nd\ne")).toBe(false)
+    expect(isCollapsiblePaste(Array.from({ length: 15 }, () => "a").join("\n"))).toBe(true)
+    expect(isCollapsiblePaste("a".repeat(4001))).toBe(true)
+    expect(isCollapsiblePaste("a".repeat(4000))).toBe(false)
+  })
+
+  it("builds the canonical placeholder", () => {
+    expect(pastePlaceholder("a\nb\nc\nd\ne")).toBe("[Pasted ~5 lines]")
+    expect(pastePlaceholder("a".repeat(801))).toBe("[Pasted ~1 lines]")
+  })
+})
+
+describe("findPastePlaceholders", () => {
+  it("finds every placeholder with its range", () => {
+    const text = "[Pasted ~5 lines] then [Pasted ~12 lines]"
+    expect(findPastePlaceholders(text)).toEqual([
+      { start: 0, end: 17 },
+      { start: 23, end: 41 },
+    ])
+  })
+
+  it("ignores look-alike text that is not a placeholder", () => {
+    expect(findPastePlaceholders("[Pasted 5 lines]")).toEqual([])
+    expect(findPastePlaceholders("Pasted ~5 lines")).toEqual([])
+  })
+
+  it("finds no placeholder in ordinary pasted text", () => {
+    expect(findPastePlaceholders("hello\nworld")).toEqual([])
+  })
+})
+
+describe("textDiff", () => {
+  it("locates an insertion", () => {
+    expect(textDiff("abcd", "abXcd")).toEqual({ start: 2, oldEnd: 2, newEnd: 3, delta: 1 })
+  })
+
+  it("locates a deletion", () => {
+    expect(textDiff("abXcd", "abcd")).toEqual({ start: 2, oldEnd: 3, newEnd: 2, delta: -1 })
+  })
+
+  it("locates a replacement", () => {
+    expect(textDiff("abcd", "abXYd")).toEqual({ start: 2, oldEnd: 3, newEnd: 4, delta: 1 })
+  })
+})
+
+describe("shiftPastes", () => {
+  const paste = (id: number, start: number, text: string): PasteRange => ({
+    id,
+    start,
+    end: start + "[Pasted ~5 lines]".length,
+    text,
+  })
+
+  it("keeps a block before the edit unchanged", () => {
+    const prev = "[Pasted ~5 lines] tail"
+    const next = "[Pasted ~5 lines] tail more"
+    const [moved] = shiftPastes([paste(1, 0, "body")], prev, next)
+    expect(moved).toEqual(paste(1, 0, "body"))
+  })
+
+  it("moves a block after an insertion", () => {
+    const prev = "lead [Pasted ~5 lines]"
+    const next = "lead more [Pasted ~5 lines]"
+    const [moved] = shiftPastes([paste(1, 5, "body")], prev, next)
+    expect(moved?.start).toBe(10)
+  })
+
+  it("moves a block after a deletion", () => {
+    const prev = "lead more [Pasted ~5 lines]"
+    const next = "lead [Pasted ~5 lines]"
+    const [moved] = shiftPastes([paste(1, 10, "body")], prev, next)
+    expect(moved?.start).toBe(5)
+  })
+
+  it("drops a block whose placeholder was edited away", () => {
+    const prev = "[Pasted ~5 lines]"
+    const next = "[Pasted ~5 line]"
+    expect(shiftPastes([paste(1, 0, "body")], prev, next)).toEqual([])
+  })
+
+  it("drops a block when the edit happens inside it", () => {
+    const prev = "[Pasted ~5 lines]"
+    const next = "[Pasted ~55 lines]"
+    expect(shiftPastes([paste(1, 0, "body")], prev, next)).toEqual([])
+  })
+
+  it("keeps identical placeholders addressed independently", () => {
+    const prev = "[Pasted ~5 lines] and [Pasted ~5 lines]"
+    const second = prev.indexOf("[Pasted ~5 lines]", 1)
+    const gap = prev.indexOf(" and ") + " and ".length
+    const next = prev.slice(0, gap) + "   " + prev.slice(gap)
+    const moved = shiftPastes([paste(1, 0, "one"), paste(2, second, "two")], prev, next)
+    expect(moved.map((item) => item.text)).toEqual(["one", "two"])
+    expect(moved[0]?.start).toBe(0)
+    expect(moved[1]?.start).toBe(second + 3)
+  })
+})
+
+describe("rebasePastes", () => {
+  const token = (lines: number) => `[Pasted ~${lines} lines]`
+  const chip = (id: number, start: number, text: string, lines = 5): PasteRange => {
+    const mark = token(lines)
+    return { id, start, end: start + mark.length, text }
+  }
+
+  it("keeps the second backing when the first of two identical chips is deleted", () => {
+    const mark = token(5)
+    const pastes = [chip(1, 0, "first"), chip(2, mark.length + 1, "second")]
+    const moved = rebasePastes(pastes, 0, mark.length + 1, 0)
+    expect(moved.map((item) => item.text)).toEqual(["second"])
+    expect(moved[0]).toEqual(chip(2, 0, "second"))
+  })
+
+  it("keeps the survivor backing when a differently sized chip precedes it", () => {
+    const mark = token(5)
+    const big = token(10)
+    const pastes = [chip(1, 0, "first"), chip(2, mark.length + 1, "second", 10)]
+    const moved = rebasePastes(pastes, 0, mark.length + 1, 0)
+    expect(moved.map((item) => item.text)).toEqual(["second"])
+    expect(moved[0]).toEqual(chip(2, 0, "second", 10))
+    expect(moved[0]?.end).toBe(big.length)
+  })
+
+  it("shifts a chip that sits after the edit", () => {
+    const moved = rebasePastes([chip(1, 5, "body")], 0, 0, 4)
+    expect(moved).toEqual([chip(1, 9, "body")])
+  })
+
+  it("keeps a chip that ends at the edit boundary", () => {
+    const mark = token(5)
+    const moved = rebasePastes([chip(1, 0, "body")], mark.length, mark.length, 3)
+    expect(moved).toEqual([chip(1, 0, "body")])
+  })
+
+  it("drops a chip the edit overlaps", () => {
+    const mark = token(5)
+    expect(rebasePastes([chip(1, 0, "body")], 0, mark.length, 0)).toEqual([])
+  })
+})
+
+describe("pasteInsertion", () => {
+  const mark = "[Pasted ~5 lines]"
+
+  it("lands the caret after the separator spaces, not inside the following text", () => {
+    const result = pasteInsertion("helloworld", 5, 5, mark)
+    expect(result.text).toBe(`hello ${mark} world`)
+    expect(result.caret).toBe(`hello ${mark} `.length)
+    expect(result.text.slice(result.caret)).toBe("world")
+  })
+
+  it("wraps the chip range around the placeholder only", () => {
+    const result = pasteInsertion("helloworld", 5, 5, mark)
+    expect(result.text.slice(result.start, result.end)).toBe(mark)
+  })
+
+  it("omits the prefix space when the text before already ends in whitespace", () => {
+    const result = pasteInsertion("hello world", 6, 6, mark)
+    expect(result.text).toBe(`hello ${mark} world`)
+    expect(result.start).toBe(6)
+    expect(result.text.slice(result.start, result.end)).toBe(mark)
+  })
+
+  it("replaces a selection with the chip", () => {
+    const result = pasteInsertion("hello world", 5, 6, mark)
+    expect(result.text).toBe(`hello ${mark} world`)
+    expect(result.text.slice(result.start, result.end)).toBe(mark)
+  })
+})
+
+describe("expandPastes", () => {
+  const paste = (id: number, start: number, text: string): PasteRange => ({
+    id,
+    start,
+    end: start + "[Pasted ~5 lines]".length,
+    text,
+  })
+
+  it("restores the full content of a single block", () => {
+    expect(expandPastes("[Pasted ~5 lines]", [paste(1, 0, "a\nb\nc\nd\ne")])).toBe("a\nb\nc\nd\ne")
+  })
+
+  it("restores identical placeholders to their own content, back to front", () => {
+    const text = "[Pasted ~5 lines] then [Pasted ~5 lines]"
+    const expanded = expandPastes(text, [paste(1, 0, "first"), paste(2, 23, "second")])
+    expect(expanded).toBe("first then second")
+  })
+
+  it("leaves placeholder-looking text with no backing unchanged", () => {
+    expect(expandPastes("typed [Pasted ~5 lines]", [])).toBe("typed [Pasted ~5 lines]")
+  })
+})
+
+describe("buildPromptSegments", () => {
+  const paste = (id: number, start: number, text: string): PasteRange => ({
+    id,
+    start,
+    end: start + "[Pasted ~5 lines]".length,
+    text,
+  })
+
+  it("marks a collapsed block as a paste chip", () => {
+    expect(buildPromptSegments("[Pasted ~5 lines] done", new Set(), [paste(7, 0, "body")])).toEqual([
+      { text: "[Pasted ~5 lines]", kind: "paste", paste: 7 },
+      { text: " done", kind: "plain" },
+    ])
+  })
+
+  it("still highlights mentions around a paste", () => {
+    const text = "@foo.ts [Pasted ~5 lines]"
+    const segments = buildPromptSegments(text, new Set(["foo.ts"]), [paste(1, 8, "body")])
+    expect(segments).toEqual([
+      { text: "@foo.ts", kind: "mention" },
+      { text: " ", kind: "plain" },
+      { text: "[Pasted ~5 lines]", kind: "paste", paste: 1 },
+    ])
+  })
+
+  it("renders a placeholder with no backing as plain text", () => {
+    expect(buildPromptSegments("[Pasted ~5 lines]", new Set(), [])).toEqual([
+      { text: "[Pasted ~5 lines]", kind: "plain" },
+    ])
+  })
+
+  it("returns an empty list for empty text", () => {
+    expect(buildPromptSegments("", new Set(), [])).toEqual([])
+  })
+})
diff --git a/packages/kilo-vscode/tests/unit/use-paste-collapse.test.ts b/packages/kilo-vscode/tests/unit/use-paste-collapse.test.ts
new file mode 100644
index 00000000000..49d32071023
--- /dev/null
+++ b/packages/kilo-vscode/tests/unit/use-paste-collapse.test.ts
@@ -0,0 +1,129 @@
+import { describe, expect, it } from "bun:test"
+import { createRoot, createSignal } from "solid-js"
+import { pastePlaceholder } from "../../webview-ui/src/components/chat/prompt-input-utils"
+import { usePasteCollapse } from "../../webview-ui/src/hooks/usePasteCollapse"
+
+const block = (tag: string) => Array.from({ length: 15 }, (_, index) => `${tag}${index}`).join("\n")
+const first = block("a")
+const second = block("b")
+const chip = pastePlaceholder(first)
+
+type Field = { value: string; selectionStart: number; selectionEnd: number }
+
+function field(value: string, caret = value.length) {
+  const el = {
+    value,
+    selectionStart: caret,
+    selectionEnd: caret,
+    focus() {},
+    setSelectionRange(start: number, end: number) {
+      el.selectionStart = start
+      el.selectionEnd = end
+    },
+  }
+  return el as unknown as Field & HTMLTextAreaElement
+}
+
+function clipboard(text: string) {
+  return {
+    defaultPrevented: false,
+    preventDefault() {},
+    clipboardData: { items: [], types: ["text/plain"], getData: () => text },
+  } as unknown as ClipboardEvent
+}
+
+function keydown(key: string) {
+  return { key, isComposing: false, preventDefault() {} } as unknown as KeyboardEvent
+}
+
+function setup() {
+  const [text, setText] = createSignal("")
+  const root = createRoot((dispose) => ({
+    dispose,
+    paste: usePasteCollapse({ enabled: () => true, text }),
+    text,
+    setText,
+  }))
+  return root
+}
+
+describe("usePasteCollapse", () => {
+  it("leaves the caret after the inserted chip instead of inside the following text", () => {
+    const ctx = setup()
+    const el = field("helloworld", 5)
+
+    ctx.paste.paste(clipboard(first), el, ctx.setText)
+
+    expect(el.value).toBe(`hello ${chip} world`)
+    expect(el.value.slice(el.selectionStart)).toBe("world")
+    expect(el.selectionStart).toBe(el.selectionEnd)
+    ctx.dispose()
+  })
+
+  it("keeps the surviving backing when the first of two identical chips is backspaced", () => {
+    const ctx = setup()
+    const el = field("")
+
+    ctx.paste.paste(clipboard(first), el, ctx.setText)
+    el.setSelectionRange(el.value.length, el.value.length)
+    ctx.paste.paste(clipboard(second), el, ctx.setText)
+
+    expect(ctx.text()).toBe(`${chip} ${chip}`)
+    expect(ctx.paste.pastes().map((item) => item.text)).toEqual([first, second])
+
+    el.setSelectionRange(chip.length, chip.length)
+    const removed = ctx.paste.backspace(keydown("Backspace"), el, ctx.setText)
+
+    expect(removed).toBe(true)
+    expect(el.value).toBe(chip)
+    expect(ctx.paste.plainText(el.value)).toBe(second)
+    ctx.dispose()
+  })
+
+  it("restores the right backing when a chip is expanded after an earlier chip was removed", () => {
+    const ctx = setup()
+    const el = field("")
+
+    ctx.paste.paste(clipboard(first), el, ctx.setText)
+    el.setSelectionRange(el.value.length, el.value.length)
+    ctx.paste.paste(clipboard(second), el, ctx.setText)
+
+    el.setSelectionRange(chip.length, chip.length)
+    ctx.paste.backspace(keydown("Backspace"), el, ctx.setText)
+
+    const [only] = ctx.paste.pastes()
+    const expanded = ctx.paste.expand(only!.id, el, ctx.setText)
+    expect(expanded).toBe(true)
+    expect(el.value).toBe(second)
+    ctx.dispose()
+  })
+
+  it("writes a large expansion directly instead of through execCommand", () => {
+    const ctx = setup()
+    const el = field("")
+    const backing = Array.from({ length: 120 }, (_, index) => `${index} ${"x".repeat(40)}`).join("\n")
+    let calls = 0
+    const global = globalThis as unknown as { document?: unknown }
+    const hadDoc = "document" in globalThis
+    const previous = global.document
+    global.document = {
+      execCommand: () => {
+        calls += 1
+        return true
+      },
+    }
+    try {
+      ctx.paste.paste(clipboard(backing), el, ctx.setText)
+      expect(calls).toBe(1)
+
+      const [entry] = ctx.paste.pastes()
+      expect(ctx.paste.expand(entry!.id, el, ctx.setText)).toBe(true)
+      expect(calls).toBe(1)
+      expect(el.value).toBe(backing)
+    } finally {
+      if (hadDoc) global.document = previous
+      else delete global.document
+    }
+    ctx.dispose()
+  })
+})
diff --git a/packages/kilo-vscode/webview-ui/src/components/chat/PromptInput.tsx b/packages/kilo-vscode/webview-ui/src/components/chat/PromptInput.tsx
index cd4382aaa49..69455520781 100644
--- a/packages/kilo-vscode/webview-ui/src/components/chat/PromptInput.tsx
+++ b/packages/kilo-vscode/webview-ui/src/components/chat/PromptInput.tsx
@@ -28,6 +28,7 @@ import { SpeechToTextButton } from "../speech-to-text/SpeechToTextButton"
 import { canUseSpeechToText, selectedSpeechToTextModel } from "../speech-to-text/availability"
 import { ThinkingSelector } from "../shared/ThinkingSelector"
 import { useFileMention } from "../../hooks/useFileMention"
+import { usePasteCollapse } from "../../hooks/usePasteCollapse"
 import type { MentionResult, WorktreeReference } from "../../hooks/file-mention-utils"
 import { isMentionEntry } from "../../hooks/file-mention-utils"
 import { useTerminalContext } from "../../hooks/useTerminalContext"
@@ -52,7 +53,6 @@ import { cycleVariant } from "../../context/session-variant-store"
 import {
   fileName,
   dirName,
-  buildHighlightSegments,
   atEnd,
   insertSpacedText,
   isPromptBusy,
@@ -86,6 +86,7 @@ import {
   mentionDrafts,
   isPendingDraftDiscarded,
   isSessionDraftDiscarded,
+  pasteDrafts,
   reviewDrafts,
   savePromptDraft,
   scrollDrafts,
@@ -347,12 +348,14 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     scroll = textareaRef?.scrollTop ?? scrollDrafts.get(key) ?? 0,
     browser: BrowserReference[] = browsers(),
     codeContexts: CodeContext[] = contexts(),
-  ) => savePromptDraft(key, next, comments, imgs, scroll, browser, codeContexts)
+    pastes = key === draftKey() ? paste.pastes().map((item) => item.text) : undefined,
+  ) => savePromptDraft(key, next, comments, imgs, scroll, browser, codeContexts, pastes)
   const readDraft = () => ({
     text: text().trim(),
     comments: reviewComments(),
     images: imageAttach.images(),
     browsers: browsers(),
+    pastes: paste.pastes().map((item) => item.text),
     contexts: contexts(),
     scroll: textareaRef?.scrollTop ?? scrollDrafts.get(draftKey()) ?? 0,
   })
@@ -360,6 +363,12 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
   const [text, setText] = createSignal("")
   const [reviewComments, setReviewComments] = createSignal<ReviewCommentEntry[]>([])
   const [browsers, setBrowsers] = createSignal<BrowserReference[]>([])
+  // Large pastes collapse into a `[Pasted ~N lines]` chip, matching the CLI and
+  // JetBrains plugin. Honor the same experimental opt-out.
+  const paste = usePasteCollapse({
+    enabled: () => globalConfig()?.experimental?.disable_paste_summary !== true,
+    text,
+  })
   const [contexts, setContexts] = createSignal<CodeContext[]>([])
   const [enhancing, setEnhancing] = createSignal(false)
   const [autoApprove, setAutoApprove] = createSignal(false)
@@ -478,6 +487,8 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
   }
   let enhanceCounter = 0
   let preEnhanceText: string | null = null
+  // Backing text of collapsed pastes, restored alongside preEnhanceText on undo.
+  let preEnhancePastes: string[] | null = null
 
   createEffect(() => {
     const sessionID = sandboxID()
@@ -565,13 +576,23 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
           codeContexts.length > 0 ||
           drafts.has(prev)
         ) {
-          saveDraft(prev, val, comments, imgs, undefined, browser, codeContexts)
+          saveDraft(
+            prev,
+            val,
+            comments,
+            imgs,
+            undefined,
+            browser,
+            codeContexts,
+            untrack(paste.pastes).map((item) => item.text),
+          )
         }
       }
       const draft = drafts.get(key) ?? ""
       const pending = reviewDrafts.get(key) ?? []
       const scroll = scrollDrafts.get(key) ?? 0
       setText(draft)
+      paste.load(draft, pasteDrafts.get(key) ?? [])
       mention.seedFromText(draft)
       const refs = mentionDrafts.get(key)
       if (refs) {
@@ -584,6 +605,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       imageAttach.replace(imageDrafts.get(key) ?? [])
       setEnhancing(false)
       preEnhanceText = null
+      preEnhancePastes = null
       history.reset()
       if (textareaRef) {
         textareaRef.value = draft
@@ -666,10 +688,12 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     const imgs = imageAttach.images()
     const browser = browsers()
     const scroll = textareaRef?.scrollTop ?? 0
+    // Capture paste backing before tabs.add() switches the draft and clears it.
+    const pastes = paste.pastes().map((item) => item.text)
     const id = tabs?.add()
     if (!id) session.clearCurrentSession()
     const key = id ? scopeDraftKey(boxKey(), pendingDraftKey(id) ?? "new") : draftKey()
-    saveDraft(key, draft, comments, imgs, scroll, browser)
+    saveDraft(key, draft, comments, imgs, scroll, browser, undefined, pastes)
   }
   window.addEventListener("newTaskRequest", onNewTaskRequest)
   onCleanup(() => window.removeEventListener("newTaskRequest", onNewTaskRequest))
@@ -699,6 +723,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       draft.scroll,
       draft.browsers,
       draft.contexts,
+      draft.pastes,
     )
   }
   window.addEventListener("agentManagerApplyDraft", onAgentManagerApplyDraft)
@@ -826,12 +851,14 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
         ...(active ? imageAttach.images() : (imageDrafts.get(key) ?? [])),
       ]
       const comments = active ? reviewComments() : (reviewDrafts.get(key) ?? [])
+      const pastes = active ? paste.pastes().map((item) => item.text) : undefined
       const codeContexts = active ? contexts() : (contextDrafts.get(key) ?? [])
-      savePromptDraft(key, value, comments, images, undefined, undefined, codeContexts)
+      savePromptDraft(key, value, comments, images, undefined, undefined, codeContexts, pastes)
       mentionDrafts.set(key, { paths: state.paths, sessions: state.sessions })
       if (!active) return
       enhanceCounter++
       preEnhanceText = null
+      preEnhancePastes = null
       history.reset()
       setText(value)
       mention.seedFromParts(state.paths, value)
@@ -964,6 +991,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       return
     }
     setText(message.text)
+    paste.load(message.text, pasteDrafts.get(key) ?? [])
     if (message.paths?.length) mention.seedFromParts(message.paths, message.text)
     else mention.seedFromText(message.text)
     if (message.sessions?.length) mention.seedSessions(message.sessions, message.text)
@@ -1078,6 +1106,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
         images: imageDrafts,
         scrolls: scrollDrafts,
         browsers: references,
+        pastes: pasteDrafts,
         contexts: contextDrafts,
       },
       source,
@@ -1226,6 +1255,17 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       return
     }
     imageAttach.handlePaste(e)
+    // Collapse a large plain-text paste into a chip before the browser inserts
+    // it; images and files keep the default path.
+    if (
+      textareaRef &&
+      paste.paste(e, textareaRef, setText, () => {
+        adjustHeight()
+        syncHighlightScroll()
+      })
+    ) {
+      return
+    }
     // After pasting text, the textarea content changes but the layout may not
     // have reflowed yet, causing the caret position to be visually out of sync.
     // Defer height recalculation to after the browser completes the reflow.
@@ -1244,6 +1284,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     const val = target.value
     setText(val)
     preEnhanceText = null
+    preEnhancePastes = null
     adjustHeight()
     syncHighlightScroll()
     history.reset()
@@ -1276,10 +1317,13 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     if (e.key === "z" && (e.metaKey || e.ctrlKey) && !e.shiftKey && preEnhanceText !== null) {
       e.preventDefault()
       const restored = preEnhanceText
+      const pastes = preEnhancePastes
       preEnhanceText = null
+      preEnhancePastes = null
       setText(restored)
       if (textareaRef) {
         textareaRef.value = restored
+        paste.load(restored, pastes ?? [])
         adjustHeight()
       }
       return
@@ -1294,7 +1338,15 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     )
       return
 
-    // Skip cursor over mentions on arrow keys
+    // Atomic collapsed-paste removal on backspace
+    if (paste.backspace(e, textareaRef, setText)) {
+      adjustHeight()
+      syncHighlightScroll()
+      return
+    }
+
+    // Skip cursor over mentions and collapsed pastes on arrow keys
+    paste.arrow(e, textareaRef)
     if (mention.handleArrowKey(e, textareaRef)) return
 
     if (slash.onKeyDown(e, textareaRef, setText, adjustHeight)) {
@@ -1369,7 +1421,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
 
   const handleEnhance = () => {
     if (isDisabled() || enhancing() || isBusy()) return
-    const draft = text().trim()
+    const draft = paste.plainText(text()).trim()
     if (!draft) {
       const description = language.t("prompt.action.enhanceDescription")
       setText(description)
@@ -1381,6 +1433,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       return
     }
     preEnhanceText = text()
+    preEnhancePastes = paste.pastes().map((item) => item.text)
     enhanceCounter++
     setEnhancing(true)
     vscode.postMessage({ type: "enhancePrompt", text: draft, requestId: `enhance-${draftKey()}-${enhanceCounter}` })
@@ -1529,7 +1582,10 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
   }
 
   const handleSend = async () => {
-    const draft = text().trim()
+    // Collapsed pastes are expanded to their full content before anything reads
+    // the draft: sending, attachments, slash detection, and history all see the
+    // real text, never the placeholder.
+    const draft = paste.plainText(text()).trim()
     if (
       !goal.prepare(draft, () => {
         setText("")
@@ -1558,6 +1614,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       imageDrafts.delete(draftKey())
       mentionDrafts.delete(draftKey())
       scrollDrafts.delete(draftKey())
+      pasteDrafts.delete(draftKey())
       if (textareaRef) textareaRef.style.height = "auto"
       return
     }
@@ -1585,6 +1642,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       imageDrafts.delete(draftKey())
       mentionDrafts.delete(draftKey())
       scrollDrafts.delete(draftKey())
+      pasteDrafts.delete(draftKey())
       if (textareaRef) textareaRef.style.height = "auto"
       matched.action()
       return
@@ -1704,7 +1762,13 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     clearDraft(key, draft)
   }
 
-  const clearDraft = (key: string, value = key === draftKey() ? text().trim() : (drafts.get(key) ?? "").trim()) => {
+  const clearDraft = (key: string, value?: string) => {
+    if (value === undefined) {
+      const active = key === draftKey()
+      const source = active ? text() : (drafts.get(key) ?? "")
+      const backing = active ? paste.pastes().map((item) => item.text) : (pasteDrafts.get(key) ?? [])
+      value = paste.plainTextFor(source, backing).trim()
+    }
     history.append(value)
     drafts.delete(key)
     reviewDrafts.delete(key)
@@ -1713,6 +1777,7 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
     imageDrafts.delete(key)
     mentionDrafts.delete(key)
     scrollDrafts.delete(key)
+    pasteDrafts.delete(key)
     if (draftKey() !== key) return
 
     history.reset()
@@ -1962,25 +2027,56 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
       <div class="prompt-input-wrapper">
         <div class="prompt-input-ghost-wrapper">
           <div class="prompt-input-highlight-overlay" ref={highlightRef} aria-hidden="true" dir="auto">
-            <Index each={buildHighlightSegments(text(), highlightMentions())}>
+            <Index each={paste.segments(text(), highlightMentions())}>
               {(seg) => (
-                <Show when={seg().highlight} fallback={<span>{seg().text}</span>}>
-                  <span
-                    class="prompt-input-file-mention"
-                    classList={{
-                      "prompt-input-file-mention--file": isPathMention(seg().text) && !isModelMention(seg().text),
-                    }}
-                    onClick={(e) => {
-                      if (!isPathMention(seg().text)) return
-                      if (isModelMention(seg().text)) return
-                      if (mention.mentionedSessions().has(seg().text.replace(/^@/, ""))) return
-                      e.preventDefault()
-                      e.stopPropagation()
-                      vscode.postMessage({ type: "openFile", filePath: seg().text.replace(/^@/, "") })
-                    }}
-                  >
-                    {seg().text}
-                  </span>
+                <Show
+                  when={seg().kind !== "paste"}
+                  fallback={
+                    <span
+                      class="prompt-input-paste"
+                      title={language.t("prompt.paste.expand")}
+                      onClick={(e) => {
+                        if (readonly()) return
+                        if (!textareaRef) return
+                        e.preventDefault()
+                        e.stopPropagation()
+                        paste.expand(seg().paste!, textareaRef, setText, () => {
+                          // A large expansion writes the textarea value directly
+                          // and skips the input handler. Reset the enhance and
+                          // history state a manual edit would reset, but leave
+                          // mention, slash, and ghost alone: restored paste
+                          // content is not new input, so it should not rerun
+                          // autocomplete or request a suggestion.
+                          preEnhanceText = null
+                          preEnhancePastes = null
+                          history.reset()
+                          adjustHeight()
+                          syncHighlightScroll()
+                        })
+                      }}
+                    >
+                      {seg().text}
+                    </span>
+                  }
+                >
+                  <Show when={seg().kind === "mention"} fallback={<span>{seg().text}</span>}>
+                    <span
+                      class="prompt-input-file-mention"
+                      classList={{
+                        "prompt-input-file-mention--file": isPathMention(seg().text) && !isModelMention(seg().text),
+                      }}
+                      onClick={(e) => {
+                        if (!isPathMention(seg().text)) return
+                        if (isModelMention(seg().text)) return
+                        if (mention.mentionedSessions().has(seg().text.replace(/^@/, ""))) return
+                        e.preventDefault()
+                        e.stopPropagation()
+                        vscode.postMessage({ type: "openFile", filePath: seg().text.replace(/^@/, "") })
+                      }}
+                    >
+                      {seg().text}
+                    </span>
+                  </Show>
                 </Show>
               )}
             </Index>
@@ -2014,6 +2110,15 @@ export const PromptInput: Component<PromptInputProps> = (props) => {
               syncGhost()
             }}
             onPaste={handlePaste}
+            onCopy={(e) => {
+              if (paste.clipboard(e, textareaRef, setText)) syncGhost()
+            }}
+            onCut={(e) => {
+              if (!paste.clipboard(e, textareaRef, setText, true)) return
+              adjustHeight()
+              syncHighlightScroll()
+              syncGhost()
+            }}
             onClick={syncGhost}
             onFocus={() => {
               hold.claim()
diff --git a/packages/kilo-vscode/webview-ui/src/components/chat/prompt-input-utils.ts b/packages/kilo-vscode/webview-ui/src/components/chat/prompt-input-utils.ts
index f3fb4874b57..ba76da14248 100644
--- a/packages/kilo-vscode/webview-ui/src/components/chat/prompt-input-utils.ts
+++ b/packages/kilo-vscode/webview-ui/src/components/chat/prompt-input-utils.ts
@@ -86,6 +86,186 @@ export function atEnd(start: number, end: number, len: number): boolean {
   return start === end && end === len
 }
 
+/** A collapsed paste: the full text lives here, the input only carries the placeholder. */
+export type PasteRange = {
+  id: number
+  start: number
+  end: number
+  text: string
+}
+
+export type PromptSegment = {
+  text: string
+  kind: "plain" | "mention" | "paste"
+  /** Paste id for a collapsed block, so a click can find its backing text. */
+  paste?: number
+}
+
+/** Number of lines a pasted block occupies, matching the CLI's newline count plus one. */
+export function promptLineCount(text: string): number {
+  return (text.match(/\n/g)?.length ?? 0) + 1
+}
+
+/**
+ * Whether a pasted block collapses into a `[Pasted ~N lines]` placeholder.
+ *
+ * The VS Code composer has more room than the CLI, so these thresholds are
+ * higher than the CLI's five lines or 800 characters. Fifteen lines is just
+ * past the ~11 lines the 200px composer shows before scrolling, and 4000
+ * characters still catches a single enormous line that would otherwise wrap
+ * into a wall of text. The line rule catches tall pastes of short lines that a
+ * character count alone would miss.
+ */
+export function isCollapsiblePaste(text: string): boolean {
+  return promptLineCount(text) >= 15 || text.length > 4000
+}
+
+/**
+ * The placeholder shown for a collapsed paste. Kept as a stable English token so
+ * every client renders and can rediscover the same block; it is literal text the
+ * user could have typed, so anything without backing text is sent unchanged.
+ */
+export function pastePlaceholder(text: string): string {
+  return `[Pasted ~${promptLineCount(text)} lines]`
+}
+
+const PASTE_PLACEHOLDER = /^\[Pasted ~\d+ lines\]$/
+const PASTE_TOKEN = /\[Pasted ~\d+ lines\]/g
+
+/** Every placeholder occurrence in `text`, in order, with its range. */
+export function findPastePlaceholders(text: string): { start: number; end: number }[] {
+  return Array.from(text.matchAll(PASTE_TOKEN), (match) => {
+    const start = match.index ?? 0
+    return { start, end: start + match[0].length }
+  })
+}
+
+function validPaste(text: string, paste: PasteRange): boolean {
+  if (paste.start < 0 || paste.end > text.length || paste.start >= paste.end) return false
+  return PASTE_PLACEHOLDER.test(text.slice(paste.start, paste.end))
+}
+
+/** The single edited span between two versions of the same text. */
+export function textDiff(prev: string, next: string): { start: number; oldEnd: number; newEnd: number; delta: number } {
+  let start = 0
+  const min = Math.min(prev.length, next.length)
+  while (start < min && prev.charCodeAt(start) === next.charCodeAt(start)) start++
+  let oldEnd = prev.length
+  let newEnd = next.length
+  while (oldEnd > start && newEnd > start && prev.charCodeAt(oldEnd - 1) === next.charCodeAt(newEnd - 1)) {
+    oldEnd--
+    newEnd--
+  }
+  return { start, oldEnd, newEnd, delta: newEnd - oldEnd }
+}
+
+/**
+ * Move paste ranges across an edit. A block the edit only repositions keeps its
+ * backing text; a range the edit touches is dropped, because the placeholder it
+ * pointed at no longer exists. Ranges that no longer spell a placeholder are
+ * dropped too, so native undo or a programmatic rewrite cannot leave a stale
+ * range pointing at unrelated text.
+ */
+export function shiftPastes(pastes: readonly PasteRange[], prev: string, next: string): PasteRange[] {
+  if (prev === next) return [...pastes]
+  const diff = textDiff(prev, next)
+  const out: PasteRange[] = []
+  for (const paste of pastes) {
+    if (paste.end <= diff.start) {
+      if (validPaste(next, paste)) out.push(paste)
+      continue
+    }
+    if (paste.start >= diff.oldEnd) {
+      const moved = { ...paste, start: paste.start + diff.delta, end: paste.end + diff.delta }
+      if (validPaste(next, moved)) out.push(moved)
+      continue
+    }
+  }
+  return out
+}
+
+/**
+ * Move paste ranges across an edit the caller already knows exactly: it replaces
+ * `[start, end)` with `length` characters of new text. Unlike `shiftPastes`,
+ * which infers the edited span from two text versions, this uses the real span,
+ * so two identical placeholders cannot be confused with one another.
+ */
+export function rebasePastes(pastes: readonly PasteRange[], start: number, end: number, length: number): PasteRange[] {
+  const delta = length - (end - start)
+  const out: PasteRange[] = []
+  for (const paste of pastes) {
+    if (paste.end <= start) {
+      out.push(paste)
+      continue
+    }
+    if (paste.start >= end) out.push({ ...paste, start: paste.start + delta, end: paste.end + delta })
+  }
+  return out
+}
+
+/**
+ * Build the text for a collapsed paste inserted at `[start, end)` together with
+ * the chip range and the caret it should leave behind. The placeholder gains a
+ * separating space on either side when the neighbouring text needs one, so the
+ * chip range excludes those spaces while the caret lands after all of them.
+ */
+export function pasteInsertion(
+  text: string,
+  start: number,
+  end: number,
+  placeholder: string,
+): { text: string; inserted: string; start: number; end: number; caret: number } {
+  const before = text.slice(0, start)
+  const after = text.slice(end)
+  const prefix = before.length > 0 && !/\s$/.test(before) ? " " : ""
+  const suffix = after.length > 0 && !/^\s/.test(after) ? " " : ""
+  const inserted = `${prefix}${placeholder}${suffix}`
+  const rangeStart = before.length + prefix.length
+  return {
+    text: `${before}${inserted}${after}`,
+    inserted,
+    start: rangeStart,
+    end: rangeStart + placeholder.length,
+    caret: before.length + inserted.length,
+  }
+}
+
+/** Replace every collapsed block in `text` with its full backing text. */
+export function expandPastes(text: string, pastes: readonly PasteRange[]): string {
+  let result = text
+  const ordered = [...pastes].filter(validPaste.bind(null, text)).sort((a, b) => b.start - a.start)
+  for (const paste of ordered) {
+    result = result.slice(0, paste.start) + paste.text + result.slice(paste.end)
+  }
+  return result
+}
+
+/**
+ * Split prompt text into plain runs, mention tokens, and collapsed paste chips.
+ * Paste ranges win over mention detection because their text is never a mention.
+ */
+export function buildPromptSegments(text: string, paths: Set<string>, pastes: readonly PasteRange[]): PromptSegment[] {
+  const segments: PromptSegment[] = []
+  const ordered = [...pastes].filter(validPaste.bind(null, text)).sort((a, b) => a.start - b.start)
+  let cursor = 0
+  for (const paste of ordered) {
+    if (paste.start < cursor) continue
+    if (paste.start > cursor) {
+      for (const part of buildHighlightSegments(text.slice(cursor, paste.start), paths)) {
+        segments.push({ text: part.text, kind: part.highlight ? "mention" : "plain" })
+      }
+    }
+    segments.push({ text: text.slice(paste.start, paste.end), kind: "paste", paste: paste.id })
+    cursor = paste.end
+  }
+  if (cursor < text.length) {
+    for (const part of buildHighlightSegments(text.slice(cursor), paths)) {
+      segments.push({ text: part.text, kind: part.highlight ? "mention" : "plain" })
+    }
+  }
+  return segments
+}
+
 export function insertSpacedText(
   text: string,
   value: string,
diff --git a/packages/kilo-vscode/webview-ui/src/hooks/usePasteCollapse.ts b/packages/kilo-vscode/webview-ui/src/hooks/usePasteCollapse.ts
new file mode 100644
index 00000000000..1ec5f369ac9
--- /dev/null
+++ b/packages/kilo-vscode/webview-ui/src/hooks/usePasteCollapse.ts
@@ -0,0 +1,288 @@
+import { createEffect, createSignal, type Accessor } from "solid-js"
+import {
+  buildHighlightSegments,
+  buildPromptSegments,
+  expandPastes,
+  findPastePlaceholders,
+  isCollapsiblePaste,
+  pasteInsertion,
+  pastePlaceholder,
+  rebasePastes,
+  shiftPastes,
+  type PasteRange,
+  type PromptSegment,
+} from "../components/chat/prompt-input-utils"
+
+export interface PasteCollapse {
+  /** Collapsed blocks in the current text, in text order. */
+  pastes: Accessor<PasteRange[]>
+  /** Split the current text for the highlight overlay, chips included. */
+  segments: (text: string, paths: Set<string>) => PromptSegment[]
+  /** The text with every collapsed block restored to its full content. */
+  plainText: (text: string) => string
+  /** Restore collapsed blocks for arbitrary text paired with stored backing. */
+  plainTextFor: (text: string, texts: readonly string[]) => string
+  /** Claim a large plain-text clipboard paste. Returns true when it was collapsed. */
+  paste: (
+    event: ClipboardEvent,
+    textarea: HTMLTextAreaElement,
+    setText: (value: string) => void,
+    after?: () => void,
+  ) => boolean
+  /** Restore one collapsed block at the caret, in place. */
+  expand: (id: number, textarea: HTMLTextAreaElement, setText: (value: string) => void, after?: () => void) => boolean
+  /** Replace the tracked blocks, e.g. when a saved draft is restored. */
+  load: (text: string, texts: readonly string[]) => void
+  /** Delete a whole collapsed block on backspace, like a mention token. */
+  backspace: (
+    event: KeyboardEvent,
+    textarea: HTMLTextAreaElement | undefined,
+    setText: (value: string) => void,
+  ) => boolean
+  /** Skip the caret over a collapsed block on ArrowLeft/ArrowRight. */
+  arrow: (event: KeyboardEvent, textarea: HTMLTextAreaElement | undefined) => boolean
+  /** Copy (or cut) a selection with collapsed blocks expanded. */
+  clipboard: (
+    event: ClipboardEvent,
+    textarea: HTMLTextAreaElement | undefined,
+    setText: (value: string) => void,
+    cut?: boolean,
+  ) => boolean
+}
+
+/** Inserts above this size skip execCommand, which turns superlinear for large writes. */
+const directLimit = 2048
+
+/**
+ * Collapses large pasted blocks behind a `[Pasted ~N lines]` chip in the prompt
+ * input. The chip is literal text in the textarea, so the overlay and textarea
+ * stay aligned; the full content is tracked here by range and restored on
+ * expand, copy, and send.
+ */
+export function usePasteCollapse(opts: { enabled: Accessor<boolean>; text: Accessor<string> }): PasteCollapse {
+  const [pastes, setPastes] = createSignal<PasteRange[]>([])
+  let counter = 0
+  let prev = ""
+  let pendingArrow: ReturnType<typeof setTimeout> | undefined
+
+  const reconcile = (value: string) => {
+    if (value === prev) return
+    const next = shiftPastes(pastes(), prev, value)
+    prev = value
+    setPastes(next)
+  }
+
+  createEffect(() => reconcile(opts.text()))
+
+  const write = (
+    textarea: HTMLTextAreaElement,
+    start: number,
+    end: number,
+    value: string,
+    expected: string,
+    setText: (value: string) => void,
+  ) => {
+    // Mark the resulting text before the edit. execCommand raises an input event
+    // that runs the reconcile effect, and that effect must treat this text as
+    // already applied or it shifts the ranges a second time.
+    prev = expected
+    textarea.focus()
+    textarea.setSelectionRange(start, end)
+    if (value.length > directLimit) {
+      // execCommand is superlinear for large inserts (seconds for ~100 KB) and
+      // fires an input event that reparses the whole prompt. Set the value
+      // directly instead; the caller still gets the resulting text and range.
+      textarea.value = expected
+    } else {
+      try {
+        document.execCommand("insertText", false, value)
+      } catch {
+        // execCommand is unavailable in some hosts; the direct write below covers it.
+      }
+      if (textarea.value !== expected) textarea.value = expected
+    }
+    setText(expected)
+    // The caller knows the exact edited span, so shift by it instead of inferring
+    // the span from a diff, which cannot tell two identical chips apart.
+    setPastes(rebasePastes(pastes(), start, end, value.length))
+  }
+
+  const paste = (
+    event: ClipboardEvent,
+    textarea: HTMLTextAreaElement,
+    setText: (value: string) => void,
+    after?: () => void,
+  ): boolean => {
+    if (!opts.enabled() || event.defaultPrevented) return false
+    const data = event.clipboardData
+    if (!data) return false
+    // Files and images keep their own paste paths.
+    if (Array.from(data.items ?? []).some((item) => item.kind === "file")) return false
+    if (Array.from(data.types ?? []).includes("Files")) return false
+    const value = data.getData("text/plain")
+    if (!value) return false
+    const text = value.replace(/\r\n/g, "\n").replace(/\r/g, "\n").trim()
+    if (!text || !isCollapsiblePaste(text)) return false
+
+    event.preventDefault()
+    const current = textarea.value
+    const start = textarea.selectionStart ?? current.length
+    const end = textarea.selectionEnd ?? start
+    const placeholder = pastePlaceholder(text)
+    const insertion = pasteInsertion(current, start, end, placeholder)
+
+    write(textarea, start, end, insertion.inserted, insertion.text, setText)
+    // write() has already moved the older ranges; append the new block.
+    const entry: PasteRange = { id: ++counter, start: insertion.start, end: insertion.end, text }
+    setPastes([...pastes(), entry].sort((a, b) => a.start - b.start))
+    textarea.setSelectionRange(insertion.caret, insertion.caret)
+    after?.()
+    return true
+  }
+
+  const expand = (
+    id: number,
+    textarea: HTMLTextAreaElement,
+    setText: (value: string) => void,
+    after?: () => void,
+  ): boolean => {
+    const entry = pastes().find((item) => item.id === id)
+    if (!entry) return false
+    const current = textarea.value
+    if (entry.end > current.length) return false
+    const expected = current.slice(0, entry.start) + entry.text + current.slice(entry.end)
+    // write() rebases against this exact edit, which drops this block and shifts
+    // the blocks after it, so the remaining ranges are already correct here.
+    write(textarea, entry.start, entry.end, entry.text, expected, setText)
+    const caret = entry.start + entry.text.length
+    textarea.setSelectionRange(caret, caret)
+    after?.()
+    return true
+  }
+
+  const load = (text: string, texts: readonly string[]) => {
+    const marks = findPastePlaceholders(text)
+    // Save and restore always happen together, so a mismatch means the text was
+    // edited outside this control. Keep no backing rather than pair the wrong
+    // content with a chip.
+    const items: PasteRange[] = []
+    if (marks.length === texts.length) {
+      for (let index = 0; index < marks.length; index++) {
+        const full = texts[index]
+        if (!full) continue
+        const mark = marks[index]!
+        items.push({ id: ++counter, start: mark.start, end: mark.end, text: full })
+      }
+    }
+    prev = text
+    setPastes(items)
+  }
+
+  const plainTextFor = (text: string, texts: readonly string[]) => {
+    const marks = findPastePlaceholders(text)
+    // A mismatch means the text was edited outside this control. Keep the text
+    // as-is rather than pair the wrong content with a chip.
+    if (marks.length !== texts.length) return text
+    const items: PasteRange[] = []
+    for (let index = 0; index < marks.length; index++) {
+      const full = texts[index]
+      if (!full) continue
+      const mark = marks[index]!
+      items.push({ id: index, start: mark.start, end: mark.end, text: full })
+    }
+    return expandPastes(text, items)
+  }
+
+  const backspace = (
+    event: KeyboardEvent,
+    textarea: HTMLTextAreaElement | undefined,
+    setText: (value: string) => void,
+  ): boolean => {
+    if (!textarea || event.key !== "Backspace" || event.isComposing) return false
+    if (textarea.selectionStart !== textarea.selectionEnd) return false
+    const cursor = textarea.selectionStart ?? 0
+    const entry = pastes().find((item) => item.end === cursor)
+    if (!entry) return false
+
+    event.preventDefault()
+    const current = textarea.value
+    // Take a single trailing space with the block so a removed chip leaves no gap.
+    const end = current[entry.end] === " " ? entry.end + 1 : entry.end
+    const expected = current.slice(0, entry.start) + current.slice(end)
+    write(textarea, entry.start, end, "", expected, setText)
+    textarea.setSelectionRange(entry.start, entry.start)
+    return true
+  }
+
+  const arrow = (event: KeyboardEvent, textarea: HTMLTextAreaElement | undefined): boolean => {
+    if (!textarea) return false
+    if (pendingArrow) clearTimeout(pendingArrow)
+    pendingArrow = undefined
+    if (event.key !== "ArrowLeft" && event.key !== "ArrowRight") return false
+    if (event.shiftKey || event.ctrlKey || event.metaKey || event.altKey) return false
+    if (textarea.selectionStart !== textarea.selectionEnd) return false
+
+    const value = textarea.value
+    const from = textarea.selectionStart ?? 0
+    const forward = event.key === "ArrowRight"
+    pendingArrow = setTimeout(() => {
+      pendingArrow = undefined
+      if (textarea.value !== value) return
+      const at = textarea.selectionStart ?? 0
+      if (at === from) return
+      for (const item of pastes()) {
+        if (at > item.start && at < item.end) {
+          const target = forward ? item.end : item.start
+          textarea.setSelectionRange(target, target)
+          return
+        }
+      }
+    }, 0)
+    return false
+  }
+
+  const clipboard = (
+    event: ClipboardEvent,
+    textarea: HTMLTextAreaElement | undefined,
+    setText: (value: string) => void,
+    cut = false,
+  ): boolean => {
+    if (!textarea) return false
+    const value = textarea.value
+    const start = textarea.selectionStart ?? 0
+    const end = textarea.selectionEnd ?? 0
+    if (start === end) return false
+    const inSelection = pastes()
+      .filter((item) => item.start >= start && item.end <= end)
+      .map((item) => ({ ...item, start: item.start - start, end: item.end - start }))
+    if (inSelection.length === 0) return false
+    event.clipboardData?.setData("text/plain", expandPastes(value.slice(start, end), inSelection))
+    event.preventDefault()
+    if (cut) write(textarea, start, end, "", value.slice(0, start) + value.slice(end), setText)
+    return true
+  }
+
+  return {
+    pastes,
+    segments: (text, paths) => {
+      const list = pastes()
+      // Fast path with no collapsed blocks: keep the original segment build so
+      // typing stays on the same code path it had before this feature.
+      if (list.length === 0) {
+        return buildHighlightSegments(text, paths).map((part) => ({
+          text: part.text,
+          kind: part.highlight ? ("mention" as const) : ("plain" as const),
+        }))
+      }
+      return buildPromptSegments(text, paths, list)
+    },
+    plainText: (text) => expandPastes(text, pastes()),
+    plainTextFor,
+    paste,
+    expand,
+    load,
+    backspace,
+    arrow,
+    clipboard,
+  }
+}
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/ar.ts b/packages/kilo-vscode/webview-ui/src/i18n/ar.ts
index d8b7e629e1c..b00dc1a3117 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/ar.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/ar.ts
@@ -197,6 +197,7 @@ export const dict = {
   "prompt.action.send.recording": "تفريغ وإرسال",
   "prompt.action.stop": "توقف",
   "prompt.action.enhance": "تحسين النص",
+  "prompt.paste.expand": "انقر لتوسيع النص الملصق",
   "prompt.action.autoApprove.enable": "تفعيل الموافقة التلقائية",
   "prompt.action.autoApprove.disable": "تعطيل الموافقة التلقائية",
   "prompt.action.autoApprove.enabled": "الموافقة التلقائية مفعلة. ستتم الموافقة على طلبات الأذونات تلقائياً.",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/br.ts b/packages/kilo-vscode/webview-ui/src/i18n/br.ts
index 7a5d9934aec..ef074abbe9c 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/br.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/br.ts
@@ -201,6 +201,7 @@ export const dict = {
   "prompt.action.send.recording": "Transcrever e enviar",
   "prompt.action.stop": "Parar",
   "prompt.action.enhance": "Melhorar prompt",
+  "prompt.paste.expand": "Clique para expandir o texto colado",
   "prompt.action.autoApprove.enable": "Ativar aprovação automática",
   "prompt.action.autoApprove.disable": "Desativar aprovação automática",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/bs.ts b/packages/kilo-vscode/webview-ui/src/i18n/bs.ts
index f27b9927274..640d08d867d 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/bs.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/bs.ts
@@ -202,6 +202,7 @@ export const dict = {
   "prompt.action.send.recording": "Transkribuj i pošalji",
   "prompt.action.stop": "Zaustavi",
   "prompt.action.enhance": "Poboljšaj prompt",
+  "prompt.paste.expand": "Kliknite da proširite zalijepljeni tekst",
   "prompt.action.autoApprove.enable": "Uključi automatsko odobravanje",
   "prompt.action.autoApprove.disable": "Isključi automatsko odobravanje",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/da.ts b/packages/kilo-vscode/webview-ui/src/i18n/da.ts
index 29c7bd3caa4..a380e59f781 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/da.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/da.ts
@@ -201,6 +201,7 @@ export const dict = {
   "prompt.action.send.recording": "Transskriber og send",
   "prompt.action.stop": "Stop",
   "prompt.action.enhance": "Forbedr prompt",
+  "prompt.paste.expand": "Klik for at udvide den indsatte tekst",
   "prompt.action.autoApprove.enable": "Aktiver automatisk godkendelse",
   "prompt.action.autoApprove.disable": "Deaktiver automatisk godkendelse",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/de.ts b/packages/kilo-vscode/webview-ui/src/i18n/de.ts
index c474f8a1875..3a06f898173 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/de.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/de.ts
@@ -207,6 +207,7 @@ export const dict = {
   "prompt.action.send.recording": "Transkribieren und senden",
   "prompt.action.stop": "Stopp",
   "prompt.action.enhance": "Prompt verbessern",
+  "prompt.paste.expand": "Klicken, um eingefügten Text zu erweitern",
   "prompt.action.autoApprove.enable": "Automatische Genehmigung aktivieren",
   "prompt.action.autoApprove.disable": "Automatische Genehmigung deaktivieren",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/en.ts b/packages/kilo-vscode/webview-ui/src/i18n/en.ts
index bd3bd385406..c8b369ed901 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/en.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/en.ts
@@ -198,6 +198,7 @@ export const dict = {
   "prompt.action.send.recording": "Transcribe and send",
   "prompt.action.stop": "Stop",
   "prompt.action.enhance": "Enhance prompt",
+  "prompt.paste.expand": "Click to expand pasted text",
   "prompt.action.indexing": "Indexing settings",
   "prompt.action.autoApprove.enable": "Enable auto-approve",
   "prompt.action.autoApprove.disable": "Disable auto-approve",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/es.ts b/packages/kilo-vscode/webview-ui/src/i18n/es.ts
index 78ce71763d3..2dd781245f2 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/es.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/es.ts
@@ -202,6 +202,7 @@ export const dict = {
   "prompt.action.send.recording": "Transcribir y enviar",
   "prompt.action.stop": "Detener",
   "prompt.action.enhance": "Mejorar prompt",
+  "prompt.paste.expand": "Haz clic para expandir el texto pegado",
   "prompt.action.autoApprove.enable": "Activar aprobación automática",
   "prompt.action.autoApprove.disable": "Desactivar aprobación automática",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/fa.ts b/packages/kilo-vscode/webview-ui/src/i18n/fa.ts
index 0abf2d09994..920c17128fb 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/fa.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/fa.ts
@@ -202,6 +202,7 @@ export const dict = {
   "prompt.action.send.recording": "رونویسی و ارسال",
   "prompt.action.stop": "توقف",
   "prompt.action.enhance": "بهبود پرامپت",
+  "prompt.paste.expand": "برای بازکردن متن جایگذاری‌شده کلیک کنید",
   "prompt.action.indexing": "تنظیمات ایندکس‌گذاری",
   "prompt.action.autoApprove.enable": "فعال‌سازی تأیید خودکار",
   "prompt.action.autoApprove.disable": "غیرفعال‌سازی تأیید خودکار",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/fr.ts b/packages/kilo-vscode/webview-ui/src/i18n/fr.ts
index c240ccc49d9..26501175941 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/fr.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/fr.ts
@@ -202,6 +202,7 @@ export const dict = {
   "prompt.action.send.recording": "Transcrire et envoyer",
   "prompt.action.stop": "Arrêter",
   "prompt.action.enhance": "Améliorer le prompt",
+  "prompt.paste.expand": "Cliquez pour développer le texte collé",
   "prompt.action.autoApprove.enable": "Activer l'approbation automatique",
   "prompt.action.autoApprove.disable": "Désactiver l'approbation automatique",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/it.ts b/packages/kilo-vscode/webview-ui/src/i18n/it.ts
index d256a7678d9..19eb27fb387 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/it.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/it.ts
@@ -179,6 +179,7 @@ export const dict = {
   "prompt.action.send.blocked": "Rispondi alla domanda in sospeso o ignorala prima di continuare",
   "prompt.action.stop": "Ferma",
   "prompt.action.enhance": "Migliora prompt",
+  "prompt.paste.expand": "Fai clic per espandere il testo incollato",
   "prompt.action.indexing": "Impostazioni indicizzazione",
   "prompt.action.autoApprove.enable": "Abilita approvazione automatica",
   "prompt.action.autoApprove.disable": "Disabilita approvazione automatica",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/ja.ts b/packages/kilo-vscode/webview-ui/src/i18n/ja.ts
index 140e65283c0..25a119714c8 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/ja.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/ja.ts
@@ -201,6 +201,7 @@ export const dict = {
   "prompt.action.send.recording": "文字起こしして送信",
   "prompt.action.stop": "停止",
   "prompt.action.enhance": "プロンプトを改善",
+  "prompt.paste.expand": "クリックして貼り付けたテキストを展開",
   "prompt.action.autoApprove.enable": "自動承認を有効化",
   "prompt.action.autoApprove.disable": "自動承認を無効化",
   "prompt.action.autoApprove.enabled": "自動承認が有効です。権限リクエストは自動的に承認されます。",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/ko.ts b/packages/kilo-vscode/webview-ui/src/i18n/ko.ts
index 2355506df1e..61d0c191ab4 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/ko.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/ko.ts
@@ -204,6 +204,7 @@ export const dict = {
   "prompt.action.send.recording": "텍스트 변환 및 전송",
   "prompt.action.stop": "중지",
   "prompt.action.enhance": "프롬프트 개선",
+  "prompt.paste.expand": "붙여넣은 텍스트를 확장하려면 클릭",
   "prompt.action.autoApprove.enable": "자동 승인 사용",
   "prompt.action.autoApprove.disable": "자동 승인 사용 안 함",
   "prompt.action.autoApprove.enabled": "자동 승인이 켜져 있습니다. 권한 요청이 자동으로 승인됩니다.",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/nl.ts b/packages/kilo-vscode/webview-ui/src/i18n/nl.ts
index 3140837850c..5b34682e0f9 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/nl.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/nl.ts
@@ -202,6 +202,7 @@ export const dict = {
   "prompt.action.send.recording": "Transcriberen en verzenden",
   "prompt.action.stop": "Stop",
   "prompt.action.enhance": "Prompt verbeteren",
+  "prompt.paste.expand": "Klik om geplakte tekst uit te vouwen",
   "prompt.action.indexing": "Indexeringsinstellingen",
   "prompt.action.autoApprove.enable": "Automatisch goedkeuren inschakelen",
   "prompt.action.autoApprove.disable": "Automatisch goedkeuren uitschakelen",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/no.ts b/packages/kilo-vscode/webview-ui/src/i18n/no.ts
index 6afb5330f10..5bf5c3ea1f3 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/no.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/no.ts
@@ -204,6 +204,7 @@ export const dict = {
   "prompt.action.send.recording": "Transkriber og send",
   "prompt.action.stop": "Stopp",
   "prompt.action.enhance": "Forbedre prompt",
+  "prompt.paste.expand": "Klikk for å utvide den innlimte teksten",
   "prompt.action.autoApprove.enable": "Aktiver automatisk godkjenning",
   "prompt.action.autoApprove.disable": "Deaktiver automatisk godkjenning",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/pl.ts b/packages/kilo-vscode/webview-ui/src/i18n/pl.ts
index e6876d861ff..e4974605865 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/pl.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/pl.ts
@@ -201,6 +201,7 @@ export const dict = {
   "prompt.action.send.recording": "Transkrybuj i wyślij",
   "prompt.action.stop": "Zatrzymaj",
   "prompt.action.enhance": "Ulepsz prompt",
+  "prompt.paste.expand": "Kliknij, aby rozwinąć wklejony tekst",
   "prompt.action.autoApprove.enable": "Włącz automatyczne zatwierdzanie",
   "prompt.action.autoApprove.disable": "Wyłącz automatyczne zatwierdzanie",
   "prompt.action.autoApprove.enabled":
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/ru.ts b/packages/kilo-vscode/webview-ui/src/i18n/ru.ts
index 42a1e39a7cc..d73491a2333 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/ru.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/ru.ts
@@ -200,6 +200,7 @@ export const dict = {
   "prompt.action.send.recording": "Расшифровать и отправить",
   "prompt.action.stop": "Остановить",
   "prompt.action.enhance": "Улучшить промпт",
+  "prompt.paste.expand": "Нажмите, чтобы развернуть вставленный текст",
   "prompt.action.autoApprove.enable": "Включить автоодобрение",
   "prompt.action.autoApprove.disable": "Отключить автоодобрение",
   "prompt.action.autoApprove.enabled": "Автоодобрение включено. Запросы разрешений будут одобряться автоматически.",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/th.ts b/packages/kilo-vscode/webview-ui/src/i18n/th.ts
index 8807c308b15..763bf85940d 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/th.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/th.ts
@@ -200,6 +200,7 @@ export const dict = {
   "prompt.action.send.recording": "ถอดเสียงและส่ง",
   "prompt.action.stop": "หยุด",
   "prompt.action.enhance": "ปรับปรุงพรอมต์",
+  "prompt.paste.expand": "คลิกเพื่อขยายข้อความที่วาง",
   "prompt.action.autoApprove.enable": "เปิดใช้การอนุมัติอัตโนมัติ",
   "prompt.action.autoApprove.disable": "ปิดใช้การอนุมัติอัตโนมัติ",
   "prompt.action.autoApprove.enabled": "เปิดใช้การอนุมัติอัตโนมัติแล้ว คำขอสิทธิ์จะได้รับการอนุมัติโดยอัตโนมัติ",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/tr.ts b/packages/kilo-vscode/webview-ui/src/i18n/tr.ts
index c2937e16d11..d5cc0235bab 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/tr.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/tr.ts
@@ -201,6 +201,7 @@ export const dict = {
   "prompt.action.send.recording": "Yazıya dök ve gönder",
   "prompt.action.stop": "Durdur",
   "prompt.action.enhance": "Komutu geliştir",
+  "prompt.paste.expand": "Yapıştırılan metni genişletmek için tıklayın",
   "prompt.action.indexing": "İndeksleme ayarları",
   "prompt.action.autoApprove.enable": "Otomatik onayı etkinleştir",
   "prompt.action.autoApprove.disable": "Otomatik onayı devre dışı bırak",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/uk.ts b/packages/kilo-vscode/webview-ui/src/i18n/uk.ts
index d1de350ad3a..e4d1221bc4b 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/uk.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/uk.ts
@@ -202,6 +202,7 @@ export const dict = {
   "prompt.action.send.recording": "Транскрибувати та надіслати",
   "prompt.action.stop": "Зупинити",
   "prompt.action.enhance": "Покращити запит",
+  "prompt.paste.expand": "Натисніть, щоб розгорнути вставлений текст",
   "prompt.action.indexing": "Налаштування індексування",
   "prompt.action.autoApprove.enable": "Увімкнути автоматичне схвалення",
   "prompt.action.autoApprove.disable": "Вимкнути автоматичне схвалення",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/zh.ts b/packages/kilo-vscode/webview-ui/src/i18n/zh.ts
index 8240d1fdf8a..cf49928ba72 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/zh.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/zh.ts
@@ -200,6 +200,7 @@ export const dict = {
   "prompt.action.send.recording": "转录并发送",
   "prompt.action.stop": "停止",
   "prompt.action.enhance": "优化提示词",
+  "prompt.paste.expand": "点击展开粘贴的文本",
   "prompt.action.enhanceDescription":
     "'增强提示'按钮通过提供额外上下文、澄清或重新表述来帮助改进您的请求。尝试在此处输入请求，然后再次点击按钮查看其工作原理。",
   "prompt.action.sandbox.enable": "启用沙盒",
diff --git a/packages/kilo-vscode/webview-ui/src/i18n/zht.ts b/packages/kilo-vscode/webview-ui/src/i18n/zht.ts
index 7a2d7f338e8..5b81cb7d4c0 100644
--- a/packages/kilo-vscode/webview-ui/src/i18n/zht.ts
+++ b/packages/kilo-vscode/webview-ui/src/i18n/zht.ts
@@ -195,6 +195,7 @@ export const dict = {
   "prompt.action.send.recording": "轉錄並傳送",
   "prompt.action.stop": "停止",
   "prompt.action.enhance": "改善提示詞",
+  "prompt.paste.expand": "點擊展開貼上的文字",
   "prompt.action.autoApprove.enable": "啟用自動核准",
   "prompt.action.autoApprove.disable": "停用自動核准",
   "prompt.action.autoApprove.enabled": "自動核准已啟用。權限請求將自動獲准。",
diff --git a/packages/kilo-vscode/webview-ui/src/styles/prompt-input.css b/packages/kilo-vscode/webview-ui/src/styles/prompt-input.css
index be5573ee8e8..3dee57b1230 100644
--- a/packages/kilo-vscode/webview-ui/src/styles/prompt-input.css
+++ b/packages/kilo-vscode/webview-ui/src/styles/prompt-input.css
@@ -445,6 +445,36 @@
   text-decoration: underline;
 }
 
+/* Collapsed large paste. The text is identical to the textarea's placeholder, so
+   the overlay stays aligned; only the chip decoration is added here. */
+.prompt-input-paste {
+  color: var(--vscode-textPreformat-foreground, var(--vscode-foreground));
+  background-color: color-mix(
+    in srgb,
+    var(--vscode-textPreformat-foreground, var(--vscode-foreground)) 12%,
+    transparent
+  );
+  border-radius: 3px;
+  box-shadow: 0 0 0 0.5px
+    color-mix(in srgb, var(--vscode-textPreformat-foreground, var(--vscode-foreground)) 30%, transparent);
+  pointer-events: auto;
+  cursor: pointer;
+  transition:
+    background-color 0.15s,
+    box-shadow 0.15s;
+}
+
+.prompt-input-paste:hover {
+  background-color: color-mix(
+    in srgb,
+    var(--vscode-textPreformat-foreground, var(--vscode-foreground)) 22%,
+    transparent
+  );
+  box-shadow: 0 0 0 0.5px
+    color-mix(in srgb, var(--vscode-textPreformat-foreground, var(--vscode-foreground)) 45%, transparent);
+  text-decoration: underline;
+}
+
 .prompt-input-ghost-text {
   color: var(--vscode-editorGhostText-foreground, rgba(255, 255, 255, 0.35));
   display: inline-flex;
diff --git a/packages/kilo-vscode/webview-ui/src/types/messages/config.ts b/packages/kilo-vscode/webview-ui/src/types/messages/config.ts
index 2eac1a6c13b..ca9eb5c3dab 100644
--- a/packages/kilo-vscode/webview-ui/src/types/messages/config.ts
+++ b/packages/kilo-vscode/webview-ui/src/types/messages/config.ts
@@ -60,6 +60,7 @@ export interface ExperimentalConfig {
   primary_tools?: string[]
   continue_loop_on_deny?: boolean
   mcp_timeout?: number
+  disable_paste_summary?: boolean
 }
 
 export interface SandboxConfig {
diff --git a/packages/kilo-vscode/webview-ui/src/utils/draft-store.ts b/packages/kilo-vscode/webview-ui/src/utils/draft-store.ts
index 531110575c0..3694ef0e6fc 100644
--- a/packages/kilo-vscode/webview-ui/src/utils/draft-store.ts
+++ b/packages/kilo-vscode/webview-ui/src/utils/draft-store.ts
@@ -11,6 +11,9 @@ export const reviewDrafts = new Map<string, ReviewCommentEntry[]>()
 export const contextDrafts = new Map<string, CodeContext[]>()
 export const imageDrafts = new Map<string, ImageAttachment[]>()
 export const scrollDrafts = new Map<string, number>()
+/** Full text of collapsed pastes per draft key, in text order, so a restored
+ *  draft can expand its `[Pasted ~N lines]` chips again. */
+export const pasteDrafts = new Map<string, string[]>()
 const discarded = new Set<string>()
 const discardedSessions = new Set<string>()
 const sending = new Set<string>()
@@ -23,6 +26,7 @@ export function savePromptDraft(
   scroll = 0,
   browsers: BrowserReference[] = [],
   contexts: CodeContext[] = [],
+  pastes?: string[],
 ) {
   if (!text) mentionDrafts.delete(key)
   if (text) drafts.set(key, text)
@@ -33,6 +37,10 @@ export function savePromptDraft(
   else imageDrafts.delete(key)
   if (browsers.length > 0) browserDrafts.set(key, browsers)
   else browserDrafts.delete(key)
+  if (pastes !== undefined) {
+    if (pastes.length > 0) pasteDrafts.set(key, pastes)
+    else pasteDrafts.delete(key)
+  }
   if (contexts.length > 0) contextDrafts.set(key, contexts)
   else contextDrafts.delete(key)
   if (text || comments.length > 0 || images.length > 0 || browsers.length > 0 || contexts.length > 0)
@@ -43,7 +51,16 @@ export function savePromptDraft(
 function remove(raw: string | undefined) {
   if (!raw) return
   const suffix = `:${raw}`
-  for (const map of [drafts, browserDrafts, reviewDrafts, contextDrafts, imageDrafts, scrollDrafts, mentionDrafts]) {
+  for (const map of [
+    drafts,
+    browserDrafts,
+    reviewDrafts,
+    contextDrafts,
+    imageDrafts,
+    scrollDrafts,
+    mentionDrafts,
+    pasteDrafts,
+  ]) {
     for (const key of map.keys()) {
       if (typeof key === "string" && key.endsWith(suffix)) map.delete(key)
     }
diff --git a/packages/kilo-vscode/webview-ui/src/utils/prompt-drafts.ts b/packages/kilo-vscode/webview-ui/src/utils/prompt-drafts.ts
index f2fb4fbeacc..c6f4b7e9bf8 100644
--- a/packages/kilo-vscode/webview-ui/src/utils/prompt-drafts.ts
+++ b/packages/kilo-vscode/webview-ui/src/utils/prompt-drafts.ts
@@ -69,37 +69,44 @@ export function clearPromptDraftRoutes(id?: string): void {
   }
 }
 
-export function movePromptDraft<T, C, I, S, B, X>(
+/**
+ * Move one draft value from `source` to `target`. Required stores never
+ * overwrite an existing target value; optional stores do.
+ */
+function move<V>(map: Map<string, V>, source: string, target: string, overwrite: boolean): V | undefined {
+  const value = map.get(source)
+  if (value === undefined) return undefined
+  if (overwrite || !map.has(target)) map.set(target, value)
+  map.delete(source)
+  return value
+}
+
+export function movePromptDraft<T, C, I, S, B, P, X>(
   stores: {
     text: Map<string, T>
     comments: Map<string, C>
     images: Map<string, I>
     scrolls: Map<string, S>
     browsers?: Map<string, B>
+    pastes?: Map<string, P>
     contexts?: Map<string, X>
   },
   source: string,
   target: string,
-): { text?: T; comments?: C; images?: I; scroll?: S; browsers?: B; contexts?: X } {
-  const draft = {
-    text: stores.text.get(source),
-    comments: stores.comments.get(source),
-    images: stores.images.get(source),
-    scroll: stores.scrolls.get(source),
-    ...(stores.browsers?.has(source) ? { browsers: stores.browsers.get(source) } : {}),
-    ...(stores.contexts?.has(source) ? { contexts: stores.contexts.get(source) } : {}),
+): { text?: T; comments?: C; images?: I; scroll?: S; browsers?: B; pastes?: P; contexts?: X } {
+  const hasBrowsers = stores.browsers?.has(source) ?? false
+  const hasPastes = stores.pastes?.has(source) ?? false
+  const hasContexts = stores.contexts?.has(source) ?? false
+  const browsers = stores.browsers ? move(stores.browsers, source, target, true) : undefined
+  const pastes = stores.pastes ? move(stores.pastes, source, target, true) : undefined
+  const contexts = stores.contexts ? move(stores.contexts, source, target, true) : undefined
+  return {
+    text: move(stores.text, source, target, false),
+    comments: move(stores.comments, source, target, false),
+    images: move(stores.images, source, target, false),
+    scroll: move(stores.scrolls, source, target, false),
+    ...(hasBrowsers ? { browsers } : {}),
+    ...(hasPastes ? { pastes } : {}),
+    ...(hasContexts ? { contexts } : {}),
   }
-  if (draft.text !== undefined && !stores.text.has(target)) stores.text.set(target, draft.text)
-  if (draft.comments !== undefined && !stores.comments.has(target)) stores.comments.set(target, draft.comments)
-  if (draft.images !== undefined && !stores.images.has(target)) stores.images.set(target, draft.images)
-  if (draft.scroll !== undefined && !stores.scrolls.has(target)) stores.scrolls.set(target, draft.scroll)
-  if (draft.browsers !== undefined) stores.browsers?.set(target, draft.browsers)
-  if (draft.contexts !== undefined) stores.contexts?.set(target, draft.contexts)
-  stores.text.delete(source)
-  stores.comments.delete(source)
-  stores.images.delete(source)
-  stores.scrolls.delete(source)
-  stores.browsers?.delete(source)
-  stores.contexts?.delete(source)
-  return draft
 }