feat: syntax-highlighted bash commands + fix backfill missing tool calls (#1347)

Co-authored-by: Letta Code <noreply@letta.com>

bun.lock

@@ -6,7 +6,9 @@
       "dependencies": {
         "@letta-ai/letta-client": "^1.7.12",
         "glob": "^13.0.0",
+        "highlight.js": "^11.11.1",
         "ink-link": "^5.0.0",
+        "lowlight": "^3.3.0",
         "open": "^10.2.0",
         "sharp": "^0.34.5",
         "ws": "^8.19.0",
@@ -98,12 +100,16 @@
 
     "@types/diff": ["@types/diff@8.0.0", "", { "dependencies": { "diff": "*" } }, "sha512-o7jqJM04gfaYrdCecCVMbZhNdG6T1MHg/oQoRFdERLV+4d+V7FijhiEAbFu0Usww84Yijk9yH58U4Jk4HbtzZw=="],
 
+    "@types/hast": ["@types/hast@3.0.4", "", { "dependencies": { "@types/unist": "*" } }, "sha512-WPs+bbQw5aCj+x6laNGWLH3wviHtoCv/P3+otBhbOhJgG8qtpdAMlTCxLtsTWA7LH1Oh/bFCHsBn0TPS5m30EQ=="],
+
     "@types/node": ["@types/node@24.9.1", "", { "dependencies": { "undici-types": "~7.16.0" } }, "sha512-QoiaXANRkSXK6p0Duvt56W208du4P9Uye9hWLWgGMDTEoKPhuenzNcC4vGUmrNkiOKTlIrBoyNQYNpSwfEZXSg=="],
 
     "@types/picomatch": ["@types/picomatch@4.0.2", "", {}, "sha512-qHHxQ+P9PysNEGbALT8f8YOSHW0KJu6l2xU8DYY0fu/EmGxXdVnuTLvFUvBgPJMSqXq29SYHveejeAha+4AYgA=="],
 
     "@types/react": ["@types/react@19.2.9", "", { "dependencies": { "csstype": "^3.2.2" } }, "sha512-Lpo8kgb/igvMIPeNV2rsYKTgaORYdO1XGVZ4Qz3akwOj0ySGYMPlQWa8BaLn0G63D1aSaAQ5ldR06wCpChQCjA=="],
 
+    "@types/unist": ["@types/unist@3.0.3", "", {}, "sha512-ko/gIFJRv177XgZsZcBwnqJN5x/Gien8qNOn0D5bQU/zAzVf9Zt3BlcUiLqhV9y4ARk0GbT3tnUiPNgnTXzc/Q=="],
+
     "@types/ws": ["@types/ws@8.18.1", "", { "dependencies": { "@types/node": "*" } }, "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg=="],
 
     "@vscode/ripgrep": ["@vscode/ripgrep@1.17.0", "", { "dependencies": { "https-proxy-agent": "^7.0.2", "proxy-from-env": "^1.1.0", "yauzl": "^2.9.2" } }, "sha512-mBRKm+ASPkUcw4o9aAgfbusIu6H4Sdhw09bjeP1YOBFTJEZAnrnk6WZwzv8NEjgC82f7ILvhmb1WIElSugea6g=="],
@@ -154,8 +160,12 @@
 
     "define-lazy-prop": ["define-lazy-prop@3.0.0", "", {}, "sha512-N+MeXYoqr3pOgn8xfyRPREN7gHakLYjhsHhWGT3fWAiL4IkAt0iDw14QiiEm2bE30c5XX5q0FtAA3CK5f9/BUg=="],
 
+    "dequal": ["dequal@2.0.3", "", {}, "sha512-0je+qPKHEMohvfRTCEo3CrPG6cAzAYgmzKyxRiYSSDkS6eGJdyVJm7WaYA5ECaAD9wLB2T4EEeymA5aFVcYXCA=="],
+
     "detect-libc": ["detect-libc@2.1.2", "", {}, "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ=="],
 
+    "devlop": ["devlop@1.1.0", "", { "dependencies": { "dequal": "^2.0.0" } }, "sha512-RWmIqhcFf1lRYBvNmr7qTNuyCt/7/ns2jbpp1+PalgE/rDQcBT0fioSMUpJ93irlUhC5hrg4cYqe6U+0ImW0rA=="],
+
     "diff": ["diff@8.0.2", "", {}, "sha512-sSuxWU5j5SR9QQji/o2qMvqRNYRDOcBTgsJ/DeCf4iSN4gW+gNMXM7wFIP+fdXZxoNiAnHUTGjCr+TSWXdRDKg=="],
 
     "emoji-regex": ["emoji-regex@10.6.0", "", {}, "sha512-toUI84YS5YmxW219erniWD0CIVOo46xGKColeNQRgOzDorgBi1v4D71/OFzgD9GO2UGKIv1C3Sp8DAn0+j5w7A=="],
@@ -178,6 +188,8 @@
 
     "has-flag": ["has-flag@5.0.1", "", {}, "sha512-CsNUt5x9LUdx6hnk/E2SZLsDyvfqANZSUq4+D3D8RzDJ2M+HDTIkF60ibS1vHaK55vzgiZw1bEPFG9yH7l33wA=="],
 
+    "highlight.js": ["highlight.js@11.11.1", "", {}, "sha512-Xwwo44whKBVCYoliBQwaPvtd/2tYFkRQtXDWj1nackaV2JPXx3L0+Jvd8/qCJ2p+ML0/XVkJ2q+Mr+UVdpJK5w=="],
+
     "https-proxy-agent": ["https-proxy-agent@7.0.6", "", { "dependencies": { "agent-base": "^7.1.2", "debug": "4" } }, "sha512-vK9P5/iUfdl95AI+JVyUuIcVtd4ofvtrOr3HNtM2yxC9bnMbEdp3x01OhQNnjb8IJYi38VlTE3mBXwcfvywuSw=="],
 
     "husky": ["husky@9.1.7", "", { "bin": { "husky": "bin.js" } }, "sha512-5gs5ytaNjBrh5Ow3zrvdUUY+0VxIuWVL4i9irt6friV+BqdCfmV11CQTWMiBYWHbXhco+J1kHfTOUkePhCDvMA=="],
@@ -214,6 +226,8 @@
 
     "loose-envify": ["loose-envify@1.4.0", "", { "dependencies": { "js-tokens": "^3.0.0 || ^4.0.0" }, "bin": { "loose-envify": "cli.js" } }, "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q=="],
 
+    "lowlight": ["lowlight@3.3.0", "", { "dependencies": { "@types/hast": "^3.0.0", "devlop": "^1.0.0", "highlight.js": "~11.11.0" } }, "sha512-0JNhgFoPvP6U6lE/UdVsSq99tn6DhjjpAj5MxG49ewd2mOBVtwWYIT8ClyABhq198aXXODMU6Ox8DrGy/CpTZQ=="],
+
     "lru-cache": ["lru-cache@11.2.2", "", {}, "sha512-F9ODfyqML2coTIsQpSkRHnLSZMtkU8Q+mSfcaIyKwy58u+8k5nvAYeiNhsyMARvzNcXJ9QfWVrcPsC9e9rAxtg=="],
 
     "micromatch": ["micromatch@4.0.8", "", { "dependencies": { "braces": "^3.0.3", "picomatch": "^2.3.1" } }, "sha512-PXwfBhYu0hBCPw8Dn0E+WDYb7af3dSLVWKi3HGv84IdF4TyFoC0ysxFd0Goxw7nSv4T/PzEJQxsYsEiFCKo2BA=="],

package.json

@@ -35,7 +35,9 @@
   "dependencies": {
     "@letta-ai/letta-client": "^1.7.12",
     "glob": "^13.0.0",
+    "highlight.js": "^11.11.1",
     "ink-link": "^5.0.0",
+    "lowlight": "^3.3.0",
     "open": "^10.2.0",
     "sharp": "^0.34.5",
     "ws": "^8.19.0"

src/agent/check-approval.ts

@@ -430,9 +430,7 @@ export async function getResumeData(
           return {
             pendingApproval,
             pendingApprovals,
-            messageHistory: prepareMessageHistory(messages, {
+            messageHistory: prepareMessageHistory(messages),
-              primaryOnly: true,
-            }),
           };
         }
       } else {
@@ -445,7 +443,7 @@ export async function getResumeData(
       return {
         pendingApproval: null,
         pendingApprovals: [],
-        messageHistory: prepareMessageHistory(messages, { primaryOnly: true }),
+        messageHistory: prepareMessageHistory(messages),
       };
     } else {
       // Use agent messages API for "default" conversation or when no conversation ID
@@ -520,9 +518,7 @@ export async function getResumeData(
           return {
             pendingApproval,
             pendingApprovals,
-            messageHistory: prepareMessageHistory(messages, {
+            messageHistory: prepareMessageHistory(messages),
-              primaryOnly: true,
-            }),
           };
         }
       } else {
@@ -535,7 +531,7 @@ export async function getResumeData(
       return {
         pendingApproval: null,
         pendingApprovals: [],
-        messageHistory: prepareMessageHistory(messages, { primaryOnly: true }),
+        messageHistory: prepareMessageHistory(messages),
       };
     }
   } catch (error) {

src/cli/App.tsx

@@ -12990,56 +12990,70 @@ If using apply_patch, use this exact relative patch path: ${applyPatchRelativePa
         style={{ flexDirection: "column" }}
       >
         {(item: StaticItem, index: number) => {
-          return (
+          try {
-            <Box key={item.id} marginTop={index > 0 ? 1 : 0}>
+            return (
-              {item.kind === "welcome" ? (
+              <Box key={item.id} marginTop={index > 0 ? 1 : 0}>
-                <WelcomeScreen loadingState="ready" {...item.snapshot} />
+                {item.kind === "welcome" ? (
-              ) : item.kind === "user" ? (
+                  <WelcomeScreen loadingState="ready" {...item.snapshot} />
-                <UserMessage line={item} prompt={statusLine.prompt} />
+                ) : item.kind === "user" ? (
-              ) : item.kind === "reasoning" ? (
+                  <UserMessage line={item} prompt={statusLine.prompt} />
-                <ReasoningMessage line={item} />
+                ) : item.kind === "reasoning" ? (
-              ) : item.kind === "assistant" ? (
+                  <ReasoningMessage line={item} />
-                <AssistantMessage line={item} />
+                ) : item.kind === "assistant" ? (
-              ) : item.kind === "tool_call" ? (
+                  <AssistantMessage line={item} />
-                <ToolCallMessage
+                ) : item.kind === "tool_call" ? (
-                  line={item}
+                  <ToolCallMessage
-                  precomputedDiffs={precomputedDiffsRef.current}
+                    line={item}
-                  lastPlanFilePath={lastPlanFilePathRef.current}
+                    precomputedDiffs={precomputedDiffsRef.current}
-                />
+                    lastPlanFilePath={lastPlanFilePathRef.current}
-              ) : item.kind === "subagent_group" ? (
+                  />
-                <SubagentGroupStatic agents={item.agents} />
+                ) : item.kind === "subagent_group" ? (
-              ) : item.kind === "error" ? (
+                  <SubagentGroupStatic agents={item.agents} />
-                <ErrorMessage line={item} />
+                ) : item.kind === "error" ? (
-              ) : item.kind === "status" ? (
+                  <ErrorMessage line={item} />
-                <StatusMessage line={item} />
+                ) : item.kind === "status" ? (
-              ) : item.kind === "event" ? (
+                  <StatusMessage line={item} />
-                !showCompactionsEnabled &&
+                ) : item.kind === "event" ? (
-                item.eventType === "compaction" ? null : (
+                  !showCompactionsEnabled &&
-                  <EventMessage line={item} />
+                  item.eventType === "compaction" ? null : (
-                )
+                    <EventMessage line={item} />
-              ) : item.kind === "separator" ? (
+                  )
-                <Box marginTop={1}>
+                ) : item.kind === "separator" ? (
-                  <Text dimColor>{"─".repeat(columns)}</Text>
+                  <Box marginTop={1}>
-                </Box>
+                    <Text dimColor>{"─".repeat(columns)}</Text>
-              ) : item.kind === "command" ? (
+                  </Box>
-                <CommandMessage line={item} />
+                ) : item.kind === "command" ? (
-              ) : item.kind === "bash_command" ? (
+                  <CommandMessage line={item} />
-                <BashCommandMessage line={item} />
+                ) : item.kind === "bash_command" ? (
-              ) : item.kind === "trajectory_summary" ? (
+                  <BashCommandMessage line={item} />
-                <TrajectorySummary line={item} />
+                ) : item.kind === "trajectory_summary" ? (
-              ) : item.kind === "approval_preview" ? (
+                  <TrajectorySummary line={item} />
-                <ApprovalPreview
+                ) : item.kind === "approval_preview" ? (
-                  toolName={item.toolName}
+                  <ApprovalPreview
-                  toolArgs={item.toolArgs}
+                    toolName={item.toolName}
-                  precomputedDiff={item.precomputedDiff}
+                    toolArgs={item.toolArgs}
-                  allDiffs={precomputedDiffsRef.current}
+                    precomputedDiff={item.precomputedDiff}
-                  planContent={item.planContent}
+                    allDiffs={precomputedDiffsRef.current}
-                  planFilePath={item.planFilePath}
+                    planContent={item.planContent}
-                  toolCallId={item.toolCallId}
+                    planFilePath={item.planFilePath}
-                />
+                    toolCallId={item.toolCallId}
-              ) : null}
+                  />
-            </Box>
+                ) : null}
-          );
+              </Box>
+            );
+          } catch (err) {
+            console.error(
+              `[Static render error] kind=${item.kind} id=${item.id}`,
+              err,
+            );
+            return (
+              <Box key={item.id}>
+                <Text color="red">
+                  ⚠ render error: {item.kind} ({String(err)})
+                </Text>
+              </Box>
+            );
+          }
         }}
       </Static>
 

src/cli/components/InlineBashApproval.tsx

@@ -4,6 +4,7 @@ import { useProgressIndicator } from "../hooks/useProgressIndicator";
 import { useTerminalWidth } from "../hooks/useTerminalWidth";
 import { useTextInputCursor } from "../hooks/useTextInputCursor";
 import { colors } from "./colors";
+import { SyntaxHighlightedCommand } from "./SyntaxHighlightedCommand";
 import { Text } from "./Text";
 
 type BashInfo = {
@@ -151,9 +152,11 @@ export const InlineBashApproval = memo(
 
           {/* Command preview */}
           <Box paddingLeft={2} flexDirection="column">
-            <Text>{bashInfo.command}</Text>
+            <SyntaxHighlightedCommand command={bashInfo.command} />
             {bashInfo.description && (
-              <Text dimColor>{bashInfo.description}</Text>
+              <Box marginTop={1}>
+                <Text dimColor>{bashInfo.description}</Text>
+              </Box>
             )}
           </Box>
         </>

src/cli/components/SyntaxHighlightedCommand.tsx

@@ -0,0 +1,172 @@
+import type { ElementContent, RootContent } from "hast";
+import { Box } from "ink";
+import { common, createLowlight } from "lowlight";
+import { memo } from "react";
+import { colors } from "./colors";
+import { Text } from "./Text";
+
+const lowlight = createLowlight(common);
+const BASH_LANGUAGE = "bash";
+const FIRST_LINE_PREFIX = "$ ";
+
+type Props = {
+  command: string;
+  showPrompt?: boolean;
+  prefix?: string;
+  suffix?: string;
+};
+
+type ShellSyntaxPalette = typeof colors.shellSyntax;
+
+/** Styled text span with a resolved color. */
+type StyledSpan = { text: string; color: string };
+
+function colorForClassName(
+  className: string,
+  palette: ShellSyntaxPalette,
+): string {
+  if (className === "hljs-comment") return palette.comment;
+  if (className === "hljs-keyword") return palette.keyword;
+  if (className === "hljs-string" || className === "hljs-regexp") {
+    return palette.string;
+  }
+  if (className === "hljs-number") return palette.number;
+  if (className === "hljs-literal") return palette.literal;
+  if (
+    className === "hljs-built_in" ||
+    className === "hljs-builtin-name" ||
+    className === "hljs-type"
+  ) {
+    return palette.builtIn;
+  }
+  if (
+    className === "hljs-variable" ||
+    className === "hljs-template-variable" ||
+    className === "hljs-params"
+  ) {
+    return palette.variable;
+  }
+  if (className === "hljs-title" || className === "hljs-function") {
+    return palette.title;
+  }
+  if (className === "hljs-attr" || className === "hljs-attribute") {
+    return palette.attr;
+  }
+  if (className === "hljs-meta") return palette.meta;
+  if (
+    className === "hljs-operator" ||
+    className === "hljs-punctuation" ||
+    className === "hljs-symbol"
+  ) {
+    return palette.operator;
+  }
+  if (className === "hljs-subst") return palette.substitution;
+  return palette.text;
+}
+
+/**
+ * Walk the HAST tree depth-first, collecting flat StyledSpan entries.
+ * Newlines within text nodes are preserved so callers can split into lines.
+ */
+function collectSpans(
+  node: RootContent | ElementContent,
+  palette: ShellSyntaxPalette,
+  spans: StyledSpan[],
+  inheritedColor?: string,
+): void {
+  if (node.type === "text") {
+    spans.push({ text: node.value, color: inheritedColor ?? palette.text });
+    return;
+  }
+
+  if (node.type === "element") {
+    const nodeClasses =
+      (node.properties?.className as string[] | undefined) ?? [];
+    const highlightClass = [...nodeClasses]
+      .reverse()
+      .find((name) => name.startsWith("hljs-"));
+    const nodeColor = highlightClass
+      ? colorForClassName(highlightClass, palette)
+      : inheritedColor;
+
+    for (const child of node.children) {
+      collectSpans(child, palette, spans, nodeColor);
+    }
+  }
+}
+
+/**
+ * Highlight the full command at once (preserves heredoc/multi-line parser
+ * state), then split the flat span list at newline boundaries into per-line
+ * arrays.
+ */
+function highlightCommand(
+  command: string,
+  palette: ShellSyntaxPalette,
+): StyledSpan[][] {
+  let spans: StyledSpan[];
+  try {
+    const root = lowlight.highlight(BASH_LANGUAGE, command);
+    spans = [];
+    for (const child of root.children) {
+      collectSpans(child, palette, spans);
+    }
+  } catch {
+    // Fallback: plain text, split by newlines.
+    return command
+      .split("\n")
+      .map((line) => [{ text: line, color: palette.text }]);
+  }
+
+  // Split spans at newline characters into separate lines.
+  const lines: StyledSpan[][] = [[]];
+  for (const span of spans) {
+    const parts = span.text.split("\n");
+    for (let i = 0; i < parts.length; i++) {
+      if (i > 0) {
+        lines.push([]);
+      }
+      const part = parts[i];
+      if (part && part.length > 0) {
+        const currentLine = lines[lines.length - 1];
+        currentLine?.push({ text: part, color: span.color });
+      }
+    }
+  }
+  return lines;
+}
+
+export const SyntaxHighlightedCommand = memo(
+  ({ command, showPrompt = true, prefix, suffix }: Props) => {
+    const palette = colors.shellSyntax;
+    const lines = highlightCommand(command, palette);
+
+    return (
+      <Box flexDirection="column">
+        {lines.map((spans, lineIdx) => {
+          const lineKey = spans.map((s) => s.text).join("");
+          return (
+            <Box key={`${lineIdx}:${lineKey}`}>
+              {showPrompt ? (
+                <Text color={palette.prompt}>
+                  {lineIdx === 0 ? FIRST_LINE_PREFIX : "  "}
+                </Text>
+              ) : null}
+              <Text color={palette.text}>
+                {lineIdx === 0 && prefix ? prefix : null}
+                {spans.map((span) => (
+                  <Text key={`${span.color}:${span.text}`} color={span.color}>
+                    {span.text}
+                  </Text>
+                ))}
+                {lineIdx === lines.length - 1 && suffix ? suffix : null}
+              </Text>
+            </Box>
+          );
+        })}
+      </Box>
+    );
+  },
+);
+
+SyntaxHighlightedCommand.displayName = "SyntaxHighlightedCommand";

src/cli/components/colors.ts

@@ -145,6 +145,42 @@ const _colors = {
     dot: brandColors.statusError, // Red dot in output
   },
 
+  // Shell command syntax highlighting
+  shellSyntaxDark: {
+    prompt: "#cba6f7",
+    text: "#cdd6f4",
+    comment: "#6c7086",
+    keyword: "#89b4fa",
+    string: "#a6e3a1",
+    number: "#fab387",
+    literal: "#fab387",
+    builtIn: "#f9e2af",
+    variable: "#f5c2e7",
+    title: "#94e2d5",
+    attr: "#74c7ec",
+    operator: "#bac2de",
+    punctuation: "#bac2de",
+    meta: "#f38ba8",
+    substitution: "#f5c2e7",
+  },
+  shellSyntaxLight: {
+    prompt: "#8839ef",
+    text: "#4c4f69",
+    comment: "#9ca0b0",
+    keyword: "#1e66f5",
+    string: "#40a02b",
+    number: "#fe640b",
+    literal: "#fe640b",
+    builtIn: "#df8e1d",
+    variable: "#ea76cb",
+    title: "#179299",
+    attr: "#209fb5",
+    operator: "#5c5f77",
+    punctuation: "#5c5f77",
+    meta: "#d20f39",
+    substitution: "#e64553",
+  },
+
   // Todo list
   todo: {
     completed: brandColors.primaryAccent, // Same blue as in-progress, with strikethrough
@@ -220,6 +256,12 @@ const _colors = {
 export const colors = {
   ..._colors,
 
+  get shellSyntax() {
+    return getTerminalTheme() === "light"
+      ? _colors.shellSyntaxLight
+      : _colors.shellSyntaxDark;
+  },
+
   // User messages (past prompts) - theme-aware background
   // Uses getter to read theme at render time (after async init)
   get userMessage() {

src/cli/components/previews/BashPreview.tsx

@@ -2,6 +2,7 @@ import { Box } from "ink";
 import { memo } from "react";
 import { useTerminalWidth } from "../../hooks/useTerminalWidth";
 import { colors } from "../colors";
+import { SyntaxHighlightedCommand } from "../SyntaxHighlightedCommand";
 import { Text } from "../Text";
 
 const SOLID_LINE = "─";
@@ -36,7 +37,7 @@ export const BashPreview = memo(({ command, description }: Props) => {
 
       {/* Command preview */}
       <Box paddingLeft={2} flexDirection="column">
-        <Text>{command}</Text>
+        <SyntaxHighlightedCommand command={command} />
         {description && <Text dimColor>{description}</Text>}
       </Box>
     </>

vendor/ink-text-input/build/index.js

@@ -70,21 +70,21 @@ function TextInput({ value: originalValue, placeholder = '', focus = true, mask,
     let renderedValue = value;
     let renderedPlaceholder = placeholder ? chalk.grey(placeholder) : undefined;
     if (showCursor && focus) {
-        renderedPlaceholder = placeholder.length > 0 ? chalk.inverse(placeholder[0]) + chalk.grey(placeholder.slice(1)) : chalk.inverse(' ');
+        renderedPlaceholder = placeholder.length > 0 ? chalk.inverse(placeholder[0]) + chalk.grey(placeholder.slice(1)) : chalk.inverse('\u00A0');
-        renderedValue = value.length > 0 ? '' : chalk.inverse(' ');
+        renderedValue = value.length > 0 ? '' : chalk.inverse('\u00A0');
         let i = 0;
         for (const char of value) {
             const isCursorPosition = i >= cursorOffset - cursorActualWidth && i <= cursorOffset;
             if (isCursorPosition && char === '\n') {
                 // Newline at cursor: show inverted space (visible cursor) then the newline
-                renderedValue += chalk.inverse(' ') + char;
+                renderedValue += chalk.inverse('\u00A0') + char;
             } else {
                 renderedValue += isCursorPosition ? chalk.inverse(char) : char;
             }
             i++;
         }
         if (value.length > 0 && cursorOffset === value.length) {
-            renderedValue += chalk.inverse(' ');
+            renderedValue += chalk.inverse('\u00A0');
         }
     }
     useInput((input, key) => {