diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 11d319708..cde118b9b 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Large pastes saved via the large-paste menu now insert `local://paste-N.md` references (previously `local://attachment-N`), so the saved paste carries a markdown extension and a clearer name.
+
 ### Fixed
 
 - Fixed `todo` calls that omit `op` hard-failing validation ("op must be operation to apply (was missing)"): the tool now validates leniently and infers the op for unambiguous payloads (`list` → `init`, `phase`+`items` → `append`, bare `items` on an empty list → `init`); `op` stays required in the schema, and ambiguous op-less calls surface the schema error as a retryable tool error.
diff --git a/packages/coding-agent/src/modes/controllers/input-controller.ts b/packages/coding-agent/src/modes/controllers/input-controller.ts
index 484128434..ab7881fa2 100644
--- a/packages/coding-agent/src/modes/controllers/input-controller.ts
+++ b/packages/coding-agent/src/modes/controllers/input-controller.ts
@@ -179,9 +179,9 @@ export class InputController {
 	// (>= LEFT_DOUBLE_TAP_MAX_GAP_MS) starts a fresh sequence. See
 	// #detectLeftDoubleTap.
 	#leftTapCount = 0;
-	// Sequential index for `local://attachment-N` references created by large-paste and
-	// pasted-file attachments. Seeded from 0 and bumped past existing attachment files.
-	#attachmentCounter = 0;
+	// Sequential index for `local://paste-N.md` references created by the large-paste
+	// flow. Seeded from 0 and bumped past existing paste files.
+	#pasteCounter = 0;
 
 	#showTinyTitleDownloadProgress(modelKey: string): void {
 		if (!isTinyTitleLocalModelKey(modelKey)) return;
@@ -1711,7 +1711,7 @@ export class InputController {
 				`Pasted ${lineCount} lines`,
 				[
 					{ label: WRAPPED_BLOCK, description: "Wrap the text in <attachment> tags, collapsed to a marker" },
-					{ label: LOCAL_FILE, description: "Save the text to a local://attachment file" },
+					{ label: LOCAL_FILE, description: "Save the text to a local://paste file" },
 					{ label: INLINE, description: "Collapse the text to an inline paste marker" },
 				],
 				{ helpText: "Esc to paste inline" },
@@ -1740,7 +1740,7 @@ export class InputController {
 	}
 
 	/**
-	 * Save a large paste to the session's `local://` store and insert a clean `local://attachment-N`
+	 * Save a large paste to the session's `local://` store and insert a clean `local://paste-N.md`
 	 * reference into the editor so the agent can `read` it on demand — instead of inlining the text or
 	 * leaking a raw temp path. Falls back to an inline paste marker when the write fails, so the
 	 * content is never lost.
@@ -1748,7 +1748,7 @@ export class InputController {
 	async #attachPasteAsFile(text: string, lineCount: number): Promise<void> {
 		try {
 			// Mirror the exact mapping the read tool's local:// resolver uses so a later
-			// `read local://attachment-N` lands on the file written here.
+			// `read local://paste-N.md` lands on the file written here.
 			const localRoot = resolveLocalRoot({
 				getArtifactsDir: () => this.ctx.sessionManager.getArtifactsDir(),
 				getSessionId: () => this.ctx.sessionManager.getSessionId(),
@@ -1756,8 +1756,8 @@ export class InputController {
 			let name: string;
 			let filePath: string;
 			do {
-				this.#attachmentCounter++;
-				name = `attachment-${this.#attachmentCounter}`;
+				this.#pasteCounter++;
+				name = `paste-${this.#pasteCounter}.md`;
 				filePath = path.join(localRoot, name);
 			} while (await Bun.file(filePath).exists());
 			await Bun.write(filePath, text);
diff --git a/packages/coding-agent/test/input-controller-large-paste.test.ts b/packages/coding-agent/test/input-controller-large-paste.test.ts
index 683a612ce..77b89e5b8 100644
--- a/packages/coding-agent/test/input-controller-large-paste.test.ts
+++ b/packages/coding-agent/test/input-controller-large-paste.test.ts
@@ -126,28 +126,28 @@ describe("InputController.presentLargePasteMenu file attachment", () => {
 		dir = undefined;
 	});
 
-	it("saves the paste to local:// and inserts a clean local://attachment reference", async () => {
+	it("saves the paste to local:// and inserts a clean local://paste reference", async () => {
 		dir = await fs.mkdtemp(path.join(os.tmpdir(), "omp-paste-test-"));
 		const { controller, spies } = createContext({ choice: "Attach as local file", artifactsDir: dir });
 
 		await controller.presentLargePasteMenu("line one\nline two", 2);
 
-		expect(spies.insertText).toHaveBeenCalledWith("local://attachment-1 ");
+		expect(spies.insertText).toHaveBeenCalledWith("local://paste-1.md ");
 		expect(spies.insertPaste).not.toHaveBeenCalled();
 		// resolveLocalRoot maps an artifacts dir to "<dir>/local"; the reference resolves there.
-		const saved = await Bun.file(path.join(dir, "local", "attachment-1")).text();
+		const saved = await Bun.file(path.join(dir, "local", "paste-1.md")).text();
 		expect(saved).toBe("line one\nline two");
 	});
 
-	it("does not overwrite an existing attachment file", async () => {
+	it("does not overwrite an existing paste file", async () => {
 		dir = await fs.mkdtemp(path.join(os.tmpdir(), "omp-paste-test-"));
-		await Bun.write(path.join(dir, "local", "attachment-1"), "previous");
+		await Bun.write(path.join(dir, "local", "paste-1.md"), "previous");
 		const { controller, spies } = createContext({ choice: "Attach as local file", artifactsDir: dir });
 
 		await controller.presentLargePasteMenu("fresh", 1);
 
-		expect(spies.insertText).toHaveBeenCalledWith("local://attachment-2 ");
-		expect(await Bun.file(path.join(dir, "local", "attachment-1")).text()).toBe("previous");
-		expect(await Bun.file(path.join(dir, "local", "attachment-2")).text()).toBe("fresh");
+		expect(spies.insertText).toHaveBeenCalledWith("local://paste-2.md ");
+		expect(await Bun.file(path.join(dir, "local", "paste-1.md")).text()).toBe("previous");
+		expect(await Bun.file(path.join(dir, "local", "paste-2.md")).text()).toBe("fresh");
 	});
 });