Improve agent autonomy and diff view readability

Agent behavior improvements:
  - Add project context detection (tsconfig.json, pom.xml, etc.)
  - Enforce validation after changes (tsc --noEmit, mvn compile, etc.)
  - Run tests automatically - never ask "do you want me to run tests"
  - Complete full loop: create → type-check → test → confirm
  - Add command detection for direct execution (run tree, run ls)

  Diff view improvements:
  - Use darker backgrounds for added/removed lines
  - Add diffLineBgAdded, diffLineBgRemoved, diffLineText theme colors
  - Improve text visibility with white text on dark backgrounds
  - Update both React/Ink and SolidJS diff components

  Streaming fixes:
  - Fix tool call argument accumulation using OpenAI index field
  - Fix streaming content display after tool calls
  - Add consecutive error tracking to prevent token waste

  Other changes:
  - ESC to abort operations, Ctrl+C to exit
  - Fix model selection when provider changes in cascade mode
  - Add debug logging for troubleshooting
  - Move tests to root tests/ folder
  - Fix banner test GRADIENT_COLORS reference

src/tools/bash/execute.ts

@@ -111,10 +111,11 @@ const executeCommand = (
 ): Promise<ToolResult> => {
   const {
     command,
-    description,
     workdir,
     timeout = BASH_DEFAULTS.TIMEOUT,
   } = args;
+  // Provide default description if not specified
+  const description = args.description ?? `Running: ${command.substring(0, 50)}`;
   const cwd = workdir ?? ctx.workingDir;
 
   updateRunningStatus(ctx, description);
@@ -165,7 +166,20 @@ export const executeBash = async (
   args: BashParams,
   ctx: ToolContext,
 ): Promise<ToolResult> => {
-  const { command, description } = args;
+  const { command } = args;
+
+  // Guard against undefined command (can happen with malformed tool calls)
+  if (!command) {
+    return {
+      success: false,
+      title: "Invalid command",
+      output: "",
+      error: "Command is required but was not provided",
+    };
+  }
+
+  // Provide default description if not specified
+  const description = args.description ?? `Running: ${command.substring(0, 50)}`;
 
   const allowed = await checkPermission(
     command,

src/tools/bash/params.ts

@@ -8,6 +8,7 @@ export const bashParams = z.object({
   command: z.string().describe("The bash command to execute"),
   description: z
     .string()
+    .optional()
     .describe("A brief description of what this command does"),
   workdir: z
     .string()