feat: Introduce /init command for generating agent collab file (AGENTS.md)

.changeset/sharp-trams-smash.md

@@ -0,0 +1,5 @@
+---
+'@dexto/tui': patch
+---
+
+Add `/init` interactive command that analyzes the codebase and generates an `AGENTS.md` file with build/lint/test commands and code style guidelines.

packages/tui/src/containers/OverlayContainer.tsx

@@ -1239,10 +1239,6 @@ export const OverlayContainer = forwardRef<OverlayContainerHandle, OverlayContai
                 buffer.setText('');
                 setInput((prev) => ({ ...prev, historyIndex: -1 }));
 
-                // Show user message for the executed command
-                const userMessage = createUserMessage(commandText);
-                setMessages((prev) => [...prev, userMessage]);
-
                 setUi((prev) => ({ ...prev, isProcessing: true, isCancelling: false }));
 
                 const { CommandService } = await import('../services/CommandService.js');
@@ -1256,6 +1252,20 @@ export const OverlayContainer = forwardRef<OverlayContainerHandle, OverlayContai
                         session.id || undefined
                     );
 
+                    // sendMessage: route through InputContainer's full streaming pipeline
+                    // (avoids duplicating processStream logic and deps here)
+                    if (result.type === 'sendMessage' && result.messageToSend) {
+                        setUi((prev) => ({ ...prev, isProcessing: false }));
+                        if (onSubmitPromptCommand) {
+                            await onSubmitPromptCommand(commandText);
+                        }
+                        return;
+                    }
+
+                    // Show user message for non-streaming commands
+                    const userMessage = createUserMessage(commandText);
+                    setMessages((prev) => [...prev, userMessage]);
+
                     if (result.type === 'output' && result.output) {
                         const output = result.output;
                         setMessages((prev) => [
@@ -1308,7 +1318,7 @@ export const OverlayContainer = forwardRef<OverlayContainerHandle, OverlayContai
                     }));
                 }
             },
-            [setInput, setUi, setMessages, agent, session.id, buffer]
+            [setInput, setUi, setMessages, agent, session.id, buffer, onSubmitPromptCommand]
         );
 
         const handleLoadIntoInput = useCallback(

packages/tui/src/interactive-commands/general-commands.ts

@@ -20,6 +20,7 @@ import type { HelpStyledData, ShortcutsStyledData } from '../state/types.js';
 import { writeToClipboard } from '../utils/clipboardUtils.js';
 import { setExitStats } from './exit-stats.js';
 import { triggerExit } from './exit-handler.js';
+import { createSendMessageMarker } from '../services/index.js';
 
 /**
  * Get the shell rc file path for the given shell
@@ -153,6 +154,30 @@ export function createHelpCommand(getAllCommands: () => CommandDefinition[]): Co
  * Note: The help command is created separately to avoid circular dependencies
  */
 export const generalCommands: CommandDefinition[] = [
+    {
+        name: 'init',
+        description: 'Analyze this codebase and create an AGENTS.md file',
+        usage: '/init',
+        category: 'General',
+        handler: async (
+            _args: string[],
+            _agent: DextoAgent,
+            _ctx: CommandContext
+        ): Promise<CommandHandlerResult> => {
+            const cwd = process.cwd();
+            const prompt = `Please analyze this codebase and create an AGENTS.md file at ${cwd}/AGENTS.md containing:
+1. Build/lint/test commands - especially for running a single test
+2. Code style guidelines including imports, formatting, types, naming conventions, error handling, etc.
+
+The file you create will be given to agentic coding agents (such as yourself) that operate in this repository. Make it about 150 lines long.
+
+If there are Cursor rules (in .cursor/rules/ or .cursorrules) or Copilot rules (in .github/copilot-instructions.md), make sure to include them.
+
+If there is already an AGENTS.md at ${cwd}/AGENTS.md, improve it instead of creating it from scratch.`;
+
+            return createSendMessageMarker(prompt);
+        },
+    },
     {
         name: 'shell',
         description: 'Execute shell command directly (use !command as shortcut)',