From 79df8f7790bd3bd13600a762423a68bd72421d03 Mon Sep 17 00:00:00 2001
From: Adam Cheng <63501289+627150795@users.noreply.github.com>
Date: Tue, 1 Sep 2026 19:09:46 +0800
Subject: [PATCH 1/3] =?UTF-8?q?fix(ui):=20=E4=BF=AE=E5=A4=8D=20Windows=20H?=
 =?UTF-8?q?ome=20=E8=B7=AF=E5=BE=84=E7=BC=A9=E5=86=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 extensions/ui-customization/footer.ts           | 11 +++++++----
 .../extensions/ui-customization/footer.test.ts  | 17 +++++++++++++++++
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/extensions/ui-customization/footer.ts b/extensions/ui-customization/footer.ts
index dd19606e..524f52a9 100644
--- a/extensions/ui-customization/footer.ts
+++ b/extensions/ui-customization/footer.ts
@@ -1,5 +1,4 @@
 import { homedir } from "node:os";
-import { relative } from "node:path";
 import type { Theme } from "@earendil-works/pi-coding-agent";
 import {
   getCapabilities,
@@ -117,10 +116,14 @@ export function formatTokens(tokens: number) {
   return `${(tokens / 1_000_000).toFixed(1)}m`;
 }
 
-export function formatDirectory(cwd: string) {
-  const home = homedir();
+export function formatDirectory(cwd: string, home = homedir()) {
   if (cwd === home) return "~";
-  const display = cwd.startsWith(`${home}/`) ? `~/${relative(home, cwd)}` : cwd;
+  const separator = cwd.startsWith(home) ? cwd[home.length] : undefined;
+  const child = separator === "/" || separator === "\\";
+  const relativePath = child ? cwd.slice(home.length + 1) : "";
+  const display = child
+    ? `~/${separator === "\\" ? relativePath.replaceAll("\\", "/") : relativePath}`
+    : cwd;
   return sanitizeTerminalLabel(display);
 }
 
diff --git a/tests/extensions/ui-customization/footer.test.ts b/tests/extensions/ui-customization/footer.test.ts
index 9ec257f9..ab672ec4 100644
--- a/tests/extensions/ui-customization/footer.test.ts
+++ b/tests/extensions/ui-customization/footer.test.ts
@@ -9,6 +9,7 @@ import {
 import {
   buildSegmentCatalog,
   fitSegmentsToWidth,
+  formatDirectory,
   renderFooter,
   resolveLineSegments,
   type FooterSegment,
@@ -43,6 +44,22 @@ const gitInfo: GitInfoState = {
   pullRequest: { number: 42, url: "https://example.com/pr/42", isDraft: false },
 };
 
+test("formatDirectory shortens Windows Home paths", () => {
+  assert.equal(
+    formatDirectory("C:\\Users\\Adam\\project", "C:\\Users\\Adam"),
+    "~/project",
+  );
+  assert.equal(formatDirectory("C:\\Users\\Adam", "C:\\Users\\Adam"), "~");
+  assert.equal(
+    formatDirectory("C:\\Users\\Adam2\\project", "C:\\Users\\Adam"),
+    "C:\\Users\\Adam2\\project",
+  );
+  assert.equal(
+    formatDirectory("/Users/adam/project", "/Users/adam"),
+    "~/project",
+  );
+});
+
 test("default one-line layout leads with model context and ends with cwd", () => {
   const lines = renderFooter({
     cwd: "/Users/me/project",

From 36f52eb78e388794575d067a0f15ea790cf2425b Mon Sep 17 00:00:00 2001
From: Adam Cheng <63501289+627150795@users.noreply.github.com>
Date: Wed, 2 Sep 2026 22:26:59 +0800
Subject: [PATCH 2/3] =?UTF-8?q?fix(ui):=20=E6=8C=89=E8=B7=AF=E5=BE=84?=
 =?UTF-8?q?=E9=A3=8E=E6=A0=BC=E5=88=A4=E6=96=AD=20Home=20=E7=9B=AE?=
 =?UTF-8?q?=E5=BD=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 extensions/ui-customization/footer.ts         | 24 ++++++++++++-------
 .../ui-customization/footer.test.ts           | 15 ++++++++++++
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/extensions/ui-customization/footer.ts b/extensions/ui-customization/footer.ts
index 524f52a9..9fd5d377 100644
--- a/extensions/ui-customization/footer.ts
+++ b/extensions/ui-customization/footer.ts
@@ -1,4 +1,5 @@
 import { homedir } from "node:os";
+import { posix, win32 } from "node:path";
 import type { Theme } from "@earendil-works/pi-coding-agent";
 import {
   getCapabilities,
@@ -116,14 +117,21 @@ export function formatTokens(tokens: number) {
   return `${(tokens / 1_000_000).toFixed(1)}m`;
 }
 
-export function formatDirectory(cwd: string, home = homedir()) {
-  if (cwd === home) return "~";
-  const separator = cwd.startsWith(home) ? cwd[home.length] : undefined;
-  const child = separator === "/" || separator === "\\";
-  const relativePath = child ? cwd.slice(home.length + 1) : "";
-  const display = child
-    ? `~/${separator === "\\" ? relativePath.replaceAll("\\", "/") : relativePath}`
-    : cwd;
+export function formatDirectory(
+  cwd: string,
+  home = homedir(),
+  pathModule = process.platform === "win32" ? win32 : posix,
+) {
+  const relativePath = pathModule.relative(home, cwd);
+  const outsideHome =
+    relativePath === ".." ||
+    relativePath.startsWith(`..${pathModule.sep}`) ||
+    pathModule.isAbsolute(relativePath);
+  const display = outsideHome
+    ? cwd
+    : relativePath
+      ? `~/${relativePath.replaceAll(pathModule.sep, "/")}`
+      : "~";
   return sanitizeTerminalLabel(display);
 }
 
diff --git a/tests/extensions/ui-customization/footer.test.ts b/tests/extensions/ui-customization/footer.test.ts
index ab672ec4..be4278c3 100644
--- a/tests/extensions/ui-customization/footer.test.ts
+++ b/tests/extensions/ui-customization/footer.test.ts
@@ -1,5 +1,6 @@
 import assert from "node:assert/strict";
 import test from "node:test";
+import { posix, win32 } from "node:path";
 import { visibleWidth } from "@earendil-works/pi-tui";
 import {
   DEFAULT_FOOTER_LINES,
@@ -60,6 +61,20 @@ test("formatDirectory shortens Windows Home paths", () => {
   );
 });
 
+test("formatDirectory respects POSIX backslashes as filename characters", () => {
+  assert.equal(
+    formatDirectory("/Users/adam\\project", "/Users/adam", posix),
+    "/Users/adam\\project",
+  );
+});
+
+test("formatDirectory compares Windows paths case-insensitively", () => {
+  assert.equal(
+    formatDirectory("c:\\users\\adam\\project", "C:\\Users\\Adam", win32),
+    "~/project",
+  );
+});
+
 test("default one-line layout leads with model context and ends with cwd", () => {
   const lines = renderFooter({
     cwd: "/Users/me/project",

From 6bfeea4a2e8ea2e032b54e42217fa399e885a667 Mon Sep 17 00:00:00 2001
From: Adam Cheng <63501289+627150795@users.noreply.github.com>
Date: Wed, 2 Sep 2026 23:00:07 +0800
Subject: [PATCH 3/3] =?UTF-8?q?test(ui):=20=E5=9B=BA=E5=AE=9A=20Windows=20?=
 =?UTF-8?q?=E8=B7=AF=E5=BE=84=E6=B5=8B=E8=AF=95=E9=A3=8E=E6=A0=BC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 tests/extensions/ui-customization/footer.test.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tests/extensions/ui-customization/footer.test.ts b/tests/extensions/ui-customization/footer.test.ts
index be4278c3..6be0465e 100644
--- a/tests/extensions/ui-customization/footer.test.ts
+++ b/tests/extensions/ui-customization/footer.test.ts
@@ -47,12 +47,15 @@ const gitInfo: GitInfoState = {
 
 test("formatDirectory shortens Windows Home paths", () => {
   assert.equal(
-    formatDirectory("C:\\Users\\Adam\\project", "C:\\Users\\Adam"),
+    formatDirectory("C:\\Users\\Adam\\project", "C:\\Users\\Adam", win32),
     "~/project",
   );
-  assert.equal(formatDirectory("C:\\Users\\Adam", "C:\\Users\\Adam"), "~");
   assert.equal(
-    formatDirectory("C:\\Users\\Adam2\\project", "C:\\Users\\Adam"),
+    formatDirectory("C:\\Users\\Adam", "C:\\Users\\Adam", win32),
+    "~",
+  );
+  assert.equal(
+    formatDirectory("C:\\Users\\Adam2\\project", "C:\\Users\\Adam", win32),
     "C:\\Users\\Adam2\\project",
   );
   assert.equal(