diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index d427add2e..998deff3d 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 ### Fixed
 
-- Fixed the `omp grep` CLI subcommand failing on paths with a stray leading colon (e.g. `:/abs/path`); it now routes the path argument through `expandPath` like `read`/`edit`/in-agent `grep` ([#5624](https://github.com/can1357/oh-my-pi/issues/5624)).
+- Fixed the `omp grep` CLI subcommand failing on paths with a stray leading colon (e.g. `:/abs/path`); it now routes the path argument through `expandPath` like `read`/`edit`/in-agent `grep`. Broadened `expandPath`'s leading-colon strip to also recover Windows-style shapes (`:C:\repo\file`, `:.\src`, `:..\rel`, `:\\server\share`) ([#5624](https://github.com/can1357/oh-my-pi/issues/5624)).
 
 ## [17.0.0] - 2026-07-15
 
diff --git a/packages/coding-agent/src/tools/path-utils.ts b/packages/coding-agent/src/tools/path-utils.ts
index 9da7262c0..5602b3c85 100644
--- a/packages/coding-agent/src/tools/path-utils.ts
+++ b/packages/coding-agent/src/tools/path-utils.ts
@@ -148,11 +148,14 @@ export function expandTilde(filePath: string, home?: string): string {
 
 export function expandPath(filePath: string): string {
 	// Some models intermittently prefix an otherwise-valid path with a stray
-	// `:` (e.g. `:/abs/path`, `:../rel`). No real path starts with `:` and it
-	// never begins a selector against an absolute/relative path, so strip it
-	// before resolution — mirroring the `@`-prefix normalization above and the
-	// implicit stripping `write` already tolerates (issue #5508).
-	const deColoned = /^:(?=[/~]|\.\.?\/)/.test(filePath) ? filePath.slice(1) : filePath;
+	// `:` (e.g. `:/abs/path`, `:../rel`, or the Windows forms `:C:\repo\file`
+	// and `:.\src`). No real path starts with `:` and it never begins a
+	// selector against an absolute/relative path, so strip it before
+	// resolution — mirroring the `@`-prefix normalization above and the
+	// implicit stripping `write` already tolerates (issues #5508, #5624). The
+	// lookahead admits POSIX (`/`, `~`, `./`, `../`) and Windows (`\`, `.\`,
+	// `..\`, drive-letter `C:`) path shapes.
+	const deColoned = /^:(?=[/\\~]|\.\.?[/\\]|[A-Za-z]:)/.test(filePath) ? filePath.slice(1) : filePath;
 	const normalized = stripWindowsExtendedLengthPathPrefix(
 		stripFileUrl(normalizeUnicodeSpaces(normalizeAtPrefix(deColoned))),
 	);
diff --git a/packages/coding-agent/test/tools/path-literal-colon-selector.test.ts b/packages/coding-agent/test/tools/path-literal-colon-selector.test.ts
index c11cc0bd9..e79abfbde 100644
--- a/packages/coding-agent/test/tools/path-literal-colon-selector.test.ts
+++ b/packages/coding-agent/test/tools/path-literal-colon-selector.test.ts
@@ -6,6 +6,7 @@ import { resetSettingsForTest, Settings } from "@oh-my-pi/pi-coding-agent/config
 import { EditTool } from "@oh-my-pi/pi-coding-agent/edit";
 import type { ToolSession } from "@oh-my-pi/pi-coding-agent/tools";
 import {
+	expandPath,
 	probeLiteralPathExists,
 	resolveToCwd,
 	splitPathAndSel,
@@ -363,6 +364,23 @@ describe("leading-colon path recovery (issue #5508)", () => {
 		expect(resolveToCwd(":name.txt", tmpDir)).toBe(path.join(tmpDir, ":name.txt"));
 	});
 
+	it("strips a leading colon before Windows path shapes in expandPath (issue #5624)", () => {
+		// Windows native paths mangled with a stray leading colon: drive-letter
+		// absolutes and `\`/`.\`/`..\` relative forms. expandPath runs before any
+		// path.resolve, so the strip is platform-independent.
+		expect(expandPath(":C:\\repo\\file.ts")).toBe("C:\\repo\\file.ts");
+		expect(expandPath(":.\\src")).toBe(".\\src");
+		expect(expandPath(":..\\sibling")).toBe("..\\sibling");
+		expect(expandPath(":\\\\server\\share")).toBe("\\\\server\\share");
+	});
+
+	it("does not strip a colon before a bare drive letter without a path (expandPath)", () => {
+		// `:selector` shapes still round-trip; the drive-letter branch requires
+		// the `<letter>:` colon to follow, distinguishing `:C:\x` from `:cache`.
+		expect(expandPath(":raw")).toBe(":raw");
+		expect(expandPath(":cache")).toBe(":cache");
+	});
+
 	it("read opens a file addressed with a leading colon", async () => {
 		const abs = path.join(tmpDir, "colon-read.txt");
 		await Bun.write(abs, "test line A\ntest line B\n");