diff --git a/packages/opencode/src/cli/cmd/tui/app.tsx b/packages/opencode/src/cli/cmd/tui/app.tsx
index 93d1fc19ae2b..3196a5ddf0a2 100644
--- a/packages/opencode/src/cli/cmd/tui/app.tsx
+++ b/packages/opencode/src/cli/cmd/tui/app.tsx
@@ -302,6 +302,16 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
     const sel = renderer.getSelection()
     if (!sel) return
 
+    if (keybind.match("input_quote_selection", evt)) {
+      if (route.data.type !== "session") return
+      if (!Selection.text(renderer)) return
+      evt.preventDefault()
+      evt.stopPropagation()
+      promptRef.current?.focus()
+      command.trigger("prompt.quote_selection")
+      return
+    }
+
     // Windows Terminal-like behavior:
     // - Ctrl+C copies and dismisses selection
     // - Esc dismisses selection
diff --git a/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx b/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
index 382bd2806ec7..4947055e304a 100644
--- a/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
+++ b/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
@@ -22,6 +22,7 @@ import { useKeyboard, useRenderer, type JSX } from "@opentui/solid"
 import { Editor } from "@tui/util/editor"
 import { useExit } from "../../context/exit"
 import { Clipboard } from "../../util/clipboard"
+import { Selection } from "../../util/selection"
 import type { AssistantMessage, FilePart } from "@opencode-ai/sdk/v2"
 import { TuiEvent } from "../../event"
 import { iife } from "@/util/iife"
@@ -246,6 +247,19 @@ export function Prompt(props: PromptProps) {
           }
         },
       },
+      {
+        title: "Quote selection",
+        value: "prompt.quote_selection",
+        keybind: "input_quote_selection",
+        category: "Prompt",
+        hidden: true,
+        onSelect: () => {
+          const text = Selection.text(renderer)
+          if (!text) return
+          insert(Selection.quote(text))
+          renderer.clearSelection()
+        },
+      },
       {
         title: "Interrupt session",
         value: "session.interrupt",
@@ -775,6 +789,10 @@ export function Prompt(props: PromptProps) {
     )
   }
 
+  function insert(text: string) {
+    input.insertText(text)
+  }
+
   async function pasteImage(file: { filename?: string; content: string; mime: string }) {
     const currentOffset = input.visualCursor.offset
     const extmarkStart = currentOffset
diff --git a/packages/opencode/src/cli/cmd/tui/util/selection.ts b/packages/opencode/src/cli/cmd/tui/util/selection.ts
index 1230852dcc07..5493f88de01f 100644
--- a/packages/opencode/src/cli/cmd/tui/util/selection.ts
+++ b/packages/opencode/src/cli/cmd/tui/util/selection.ts
@@ -11,8 +11,21 @@ type Renderer = {
 }
 
 export namespace Selection {
+  export function text(renderer: Renderer) {
+    return renderer.getSelection()?.getSelectedText()
+  }
+
+  export function quote(text: string) {
+    return text
+      .replace(/\r\n/g, "\n")
+      .replace(/\r/g, "\n")
+      .split("\n")
+      .map((line) => `> ${line}`)
+      .join("\n") + "\n\n"
+  }
+
   export function copy(renderer: Renderer, toast: Toast): boolean {
-    const text = renderer.getSelection()?.getSelectedText()
+    const text = Selection.text(renderer)
     if (!text) return false
 
     Clipboard.copy(text)
diff --git a/packages/opencode/src/config/config.ts b/packages/opencode/src/config/config.ts
index 850bcc28bcd9..9d7ca851ee1c 100644
--- a/packages/opencode/src/config/config.ts
+++ b/packages/opencode/src/config/config.ts
@@ -670,6 +670,7 @@ export namespace Config {
       variant_cycle: z.string().optional().default("ctrl+t").describe("Cycle model variants"),
       input_clear: z.string().optional().default("ctrl+c").describe("Clear input field"),
       input_paste: z.string().optional().default("ctrl+v").describe("Paste from clipboard"),
+      input_quote_selection: z.string().optional().default("ctrl+q").describe("Quote selected text into input"),
       input_submit: z.string().optional().default("return").describe("Submit input"),
       input_newline: z
         .string()
diff --git a/packages/opencode/test/cli/tui/selection.test.ts b/packages/opencode/test/cli/tui/selection.test.ts
new file mode 100644
index 000000000000..ea5a600e4117
--- /dev/null
+++ b/packages/opencode/test/cli/tui/selection.test.ts
@@ -0,0 +1,16 @@
+import { describe, expect, test } from "bun:test"
+import { Selection } from "../../../src/cli/cmd/tui/util/selection"
+
+describe("Selection.quote", () => {
+  test("quotes each line and appends spacing", () => {
+    expect(Selection.quote("original\nfew\nlines")).toBe("> original\n> few\n> lines\n\n")
+  })
+
+  test("normalizes windows line endings", () => {
+    expect(Selection.quote("first\r\nsecond\rthird")).toBe("> first\n> second\n> third\n\n")
+  })
+
+  test("preserves blank lines inside selection", () => {
+    expect(Selection.quote("first\n\nthird")).toBe("> first\n> \n> third\n\n")
+  })
+})
diff --git a/packages/opencode/test/config/tui.test.ts b/packages/opencode/test/config/tui.test.ts
index a8d98b66cdec..a7eb6a620d04 100644
--- a/packages/opencode/test/config/tui.test.ts
+++ b/packages/opencode/test/config/tui.test.ts
@@ -159,6 +159,22 @@ test("migrates tui-specific keys from opencode.json when tui.json does not exist
   })
 })
 
+test("accepts input_quote_selection keybind", async () => {
+  await using tmp = await tmpdir({
+    init: async (dir) => {
+      await Bun.write(path.join(dir, "tui.json"), JSON.stringify({ keybinds: { input_quote_selection: "ctrl+q" } }, null, 2))
+    },
+  })
+
+  await Instance.provide({
+    directory: tmp.path,
+    fn: async () => {
+      const config = await TuiConfig.get()
+      expect(config.keybinds?.input_quote_selection).toBe("ctrl+q")
+    },
+  })
+})
+
 test("migrates project legacy tui keys even when global tui.json already exists", async () => {
   await using tmp = await tmpdir({
     init: async (dir) => {