feat: add file state indicators to sidebar

src/core/loaders.ts

@@ -139,6 +139,7 @@ function buildDiffFile(
   index: number,
   sourcePrefix: string,
   agentContext: AgentContext | null,
+  isUntracked?: boolean,
   previousPath?: string,
 ): DiffFile {
   return {
@@ -150,6 +151,7 @@ function buildDiffFile(
     stats: countDiffStats(metadata),
     metadata,
     agent: findAgentFileContext(agentContext, metadata.name, metadata.prevName),
+    isUntracked,
   };
 }
 
@@ -235,6 +237,7 @@ function buildUntrackedDiffFile(
     index,
     sourcePrefix,
     agentContext,
+    true, // isUntracked
   );
 }
 
@@ -363,7 +366,9 @@ async function loadFileDiffChangeset(
     sourceLabel: input.kind === "difftool" ? "git difftool" : "file compare",
     title,
     agentSummary: agentContext?.summary,
-    files: [buildDiffFile(metadata, patch, 0, displayPath, agentContext, basename(input.left))],
+    files: [
+      buildDiffFile(metadata, patch, 0, displayPath, agentContext, undefined, basename(input.left)),
+    ],
   } satisfies Changeset;
 }
 

src/core/types.ts

@@ -39,6 +39,7 @@ export interface DiffFile {
   };
   metadata: FileDiffMetadata;
   agent: AgentFileContext | null;
+  isUntracked?: boolean;
 }
 
 export interface Changeset {

src/ui/components/panes/DiffSection.tsx

@@ -3,7 +3,7 @@ import type { DiffFile, LayoutMode } from "../../../core/types";
 import { PierreDiffView } from "../../diff/PierreDiffView";
 import { getAnnotatedHunkIndices, type VisibleAgentNote } from "../../lib/agentAnnotations";
 import { diffSectionId } from "../../lib/ids";
-import { fileLabel } from "../../lib/files";
+import { fileLabelParts } from "../../lib/files";
 import { fitText } from "../../lib/text";
 import type { AppTheme } from "../../themes";
 
@@ -52,6 +52,7 @@ function DiffSectionComponent({
   const additionsText = `+${file.stats.additions}`;
   const deletionsText = `-${file.stats.deletions}`;
   const annotatedHunkIndices = getAnnotatedHunkIndices(file);
+  const { filename, stateLabel } = fileLabelParts(file);
 
   return (
     <box
@@ -90,7 +91,12 @@ function DiffSectionComponent({
         onMouseUp={onSelect}
       >
         {/* Clicking the file header jumps the main stream selection without collapsing to a single-file view. */}
-        <text fg={theme.text}>{fitText(fileLabel(file), headerLabelWidth)}</text>
+        <box style={{ flexDirection: "row" }}>
+          <text fg={theme.text}>
+            {fitText(filename, Math.max(1, headerLabelWidth - (stateLabel?.length ?? 0)))}
+          </text>
+          {stateLabel && <text fg={theme.muted}>{stateLabel}</text>}
+        </box>
         <box
           style={{
             width: headerStatsWidth,

src/ui/components/panes/DiffSectionPlaceholder.tsx

@@ -1,6 +1,6 @@
 import type { DiffFile } from "../../../core/types";
 import { diffSectionId } from "../../lib/ids";
-import { fileLabel } from "../../lib/files";
+import { fileLabelParts } from "../../lib/files";
 import { fitText } from "../../lib/text";
 import type { AppTheme } from "../../themes";
 
@@ -28,6 +28,7 @@ export function DiffSectionPlaceholder({
 }: DiffSectionPlaceholderProps) {
   const additionsText = `+${file.stats.additions}`;
   const deletionsText = `-${file.stats.deletions}`;
+  const { filename, stateLabel } = fileLabelParts(file);
 
   return (
     <box
@@ -64,7 +65,12 @@ export function DiffSectionPlaceholder({
         }}
         onMouseUp={onSelect}
       >
-        <text fg={theme.text}>{fitText(fileLabel(file), headerLabelWidth)}</text>
+        <box style={{ flexDirection: "row" }}>
+          <text fg={theme.text}>
+            {fitText(filename, Math.max(1, headerLabelWidth - (stateLabel?.length ?? 0)))}
+          </text>
+          {stateLabel && <text fg={theme.muted}>{stateLabel}</text>}
+        </box>
         <box
           style={{
             width: headerStatsWidth,

src/ui/components/panes/FileListItem.tsx

@@ -3,6 +3,27 @@ import { fitText, padText } from "../../lib/text";
 import type { AppTheme } from "../../themes";
 import { fileRowId } from "../../lib/ids";
 
+/** Get icon and color for file state using standard git status codes. */
+function getFileStateIcon(entry: FileListEntry, theme: AppTheme): { icon: string; color: string } {
+  if (entry.isUntracked) {
+    return { icon: "?", color: theme.fileUntracked };
+  }
+
+  switch (entry.changeType) {
+    case "new":
+      return { icon: "A", color: theme.fileNew };
+    case "deleted":
+      return { icon: "D", color: theme.fileDeleted };
+    case "rename-pure":
+    case "rename-changed":
+      return { icon: "R", color: theme.fileRenamed };
+    case "change":
+      return { icon: "M", color: theme.fileModified };
+    default:
+      return { icon: "", color: theme.text };
+  }
+}
+
 /** Render one folder header in the navigation sidebar. */
 export function FileGroupHeader({
   entry,
@@ -47,7 +68,9 @@ export function FileListItem({
 }) {
   const rowBackground = selected ? theme.panelAlt : theme.panel;
   const statsWidth = additionsWidth + 1 + deletionsWidth;
-  const nameWidth = Math.max(1, textWidth - 1 - statsWidth - 1);
+  const { icon, color } = getFileStateIcon(entry, theme);
+  const iconWidth = icon ? 2 : 0; // icon + space
+  const nameWidth = Math.max(1, textWidth - 1 - iconWidth - statsWidth - 1);
 
   return (
     <box
@@ -76,6 +99,7 @@ export function FileListItem({
           backgroundColor: rowBackground,
         }}
       >
+        {icon && <text fg={color}>{icon} </text>}
         <text fg={theme.text}>{padText(fitText(entry.name, nameWidth), nameWidth)}</text>
         <text fg={theme.badgeAdded}>{entry.additionsText.padStart(additionsWidth, " ")}</text>
         <text fg={selected ? theme.text : theme.muted}> </text>

src/ui/lib/files.ts

@@ -1,4 +1,5 @@
 import { basename, dirname } from "node:path/posix";
+import type { FileDiffMetadata } from "@pierre/diffs";
 import type { AgentAnnotation, DiffFile } from "../../core/types";
 
 export interface FileListEntry {
@@ -7,6 +8,8 @@ export interface FileListEntry {
   name: string;
   additionsText: string;
   deletionsText: string;
+  changeType: FileDiffMetadata["type"];
+  isUntracked: boolean;
 }
 
 export interface FileGroupEntry {
@@ -92,6 +95,8 @@ export function buildSidebarEntries(files: DiffFile[]): SidebarEntry[] {
       name: sidebarFileName(file),
       additionsText: `+${file.stats.additions}`,
       deletionsText: `-${file.stats.deletions}`,
+      changeType: file.metadata.type,
+      isUntracked: file.isUntracked ?? false,
     });
   });
 
@@ -100,11 +105,33 @@ export function buildSidebarEntries(files: DiffFile[]): SidebarEntry[] {
 
 /** Build the canonical file label used across headers and note cards. */
 export function fileLabel(file: DiffFile | undefined) {
+  const { filename, stateLabel } = fileLabelParts(file);
+  return stateLabel ? `${filename}${stateLabel}` : filename;
+}
+
+/** Split file label into filename and state label for styled rendering. */
+export function fileLabelParts(file: DiffFile | undefined): {
+  filename: string;
+  stateLabel: string | null;
+} {
   if (!file) {
-    return "No file selected";
+    return { filename: "No file selected", stateLabel: null };
+  }
+
+  const baseLabel =
+    file.previousPath && file.previousPath !== file.path
+      ? `${file.previousPath} -> ${file.path}`
+      : file.path;
+
+  // Determine state label for special cases
+  let stateLabel: string | null = null;
+  if (file.isUntracked) {
+    stateLabel = " (untracked)";
+  } else if (file.metadata.type === "new") {
+    stateLabel = " (new)";
+  } else if (file.metadata.type === "deleted") {
+    stateLabel = " (deleted)";
   }
 
-  return file.previousPath && file.previousPath !== file.path
-    ? `${file.previousPath} -> ${file.path}`
-    : file.path;
+  return { filename: baseLabel, stateLabel };
 }

src/ui/themes.ts

@@ -26,6 +26,11 @@ export interface AppTheme {
   badgeAdded: string;
   badgeRemoved: string;
   badgeNeutral: string;
+  fileNew: string;
+  fileDeleted: string;
+  fileRenamed: string;
+  fileModified: string;
+  fileUntracked: string;
   noteBorder: string;
   noteBackground: string;
   noteTitleBackground: string;
@@ -110,6 +115,11 @@ export const THEMES: AppTheme[] = [
       badgeAdded: "#88d39b",
       badgeRemoved: "#f0a0a0",
       badgeNeutral: "#a9b4bf",
+      fileNew: "#88d39b",
+      fileDeleted: "#f0a0a0",
+      fileRenamed: "#e6cf98",
+      fileModified: "#c49bff",
+      fileUntracked: "#7fd1ff",
       noteBorder: "#c6a0ff",
       noteBackground: "#241c31",
       noteTitleBackground: "#322446",
@@ -154,6 +164,11 @@ export const THEMES: AppTheme[] = [
       badgeAdded: "#5ad188",
       badgeRemoved: "#ff8b8b",
       badgeNeutral: "#89a5d3",
+      fileNew: "#5ad188",
+      fileDeleted: "#ff8b8b",
+      fileRenamed: "#ffd883",
+      fileModified: "#b794f6",
+      fileUntracked: "#7fd1ff",
       noteBorder: "#c49bff",
       noteBackground: "#211a36",
       noteTitleBackground: "#30234f",
@@ -198,6 +213,11 @@ export const THEMES: AppTheme[] = [
       badgeAdded: "#3f8d58",
       badgeRemoved: "#b4545b",
       badgeNeutral: "#8e7355",
+      fileNew: "#3f8d58",
+      fileDeleted: "#b4545b",
+      fileRenamed: "#9f6c1f",
+      fileModified: "#7d5bc4",
+      fileUntracked: "#4a6890",
       noteBorder: "#7d5bc4",
       noteBackground: "#efe6ff",
       noteTitleBackground: "#e3d7ff",
@@ -242,6 +262,11 @@ export const THEMES: AppTheme[] = [
       badgeAdded: "#83d99d",
       badgeRemoved: "#ff9d8f",
       badgeNeutral: "#f1be9d",
+      fileNew: "#83d99d",
+      fileDeleted: "#ff9d8f",
+      fileRenamed: "#ffd08f",
+      fileModified: "#d8b4fe",
+      fileUntracked: "#ffb07a",
       noteBorder: "#e1a3ff",
       noteBackground: "#311d36",
       noteTitleBackground: "#452650",