feat: add Letta Code CLI provider

README.md

@@ -101,6 +101,7 @@ Emdash currently supports 24 CLI providers, and we are adding new ones regularly
 | [Kilocode](https://kilo.ai/docs/cli) | ✅ Supported | <code>npm install -g @kilocode/cli</code> |
 | [Kimi](https://www.kimi.com/code/docs/en/kimi-cli/guides/getting-started.html) | ✅ Supported | <code>uv tool install kimi-cli</code> |
 | [Kiro (AWS)](https://kiro.dev/docs/cli/) | ✅ Supported | <code>curl -fsSL https://cli.kiro.dev/install &#124; bash</code> |
+| [Letta](https://docs.letta.com/letta-code/cli) | ✅ Supported | <code>npm install -g @letta-ai/letta-code</code> |
 | [Mistral Vibe](https://github.com/mistralai/mistral-vibe) | ✅ Supported | <code>curl -LsSf https://mistral.ai/vibe/install.sh &#124; bash</code> |
 | [OpenCode](https://opencode.ai/docs/cli/) | ✅ Supported | <code>npm install -g opencode-ai</code> |
 | [Pi](https://github.com/badlogic/pi-mono/tree/main/packages/coding-agent) | ✅ Supported | <code>npm install -g @mariozechner/pi-coding-agent</code> |

agents/integrations/providers.md

@@ -6,9 +6,9 @@
 - `src/main/core/dependencies/dependency-manager.ts`
 - `src/main/core/pty/`
 
-## Current Providers (25)
+## Current Providers (26)
 
-codex, claude, devin, qwen, droid, gemini, cursor, copilot, amp, opencode, hermes, charm, auggie, goose, kimi, kilocode, kiro, rovo, cline, continue, codebuff, mistral, junie, pi, autohand
+codex, claude, devin, qwen, droid, gemini, cursor, copilot, amp, opencode, hermes, charm, auggie, goose, kimi, kilocode, kiro, rovo, cline, continue, codebuff, mistral, junie, pi, autohand, letta
 
 ## Provider Metadata Includes
 

src/main/core/agent-hooks/classifiers/index.ts

@@ -18,6 +18,7 @@ import { createJunieClassifier } from './junie';
 import { createKilocodeClassifier } from './kilocode';
 import { createKimiClassifier } from './kimi';
 import { createKiroClassifier } from './kiro';
+import { createLettaClassifier } from './letta';
 import { createMistralClassifier } from './mistral';
 import { createOpenCodeClassifier } from './opencode';
 import { createPiClassifier } from './pi';
@@ -44,6 +45,7 @@ const classifierFactories: Partial<Record<AgentProviderId, () => ProviderClassif
   kilocode: createKilocodeClassifier,
   kimi: createKimiClassifier,
   kiro: createKiroClassifier,
+  letta: createLettaClassifier,
   mistral: createMistralClassifier,
   opencode: createOpenCodeClassifier,
   pi: createPiClassifier,

src/main/core/agent-hooks/classifiers/letta.ts

@@ -0,0 +1,55 @@
+import { createProviderClassifier, type ClassificationResult } from './base';
+
+export function createLettaClassifier() {
+  return createProviderClassifier((text: string): ClassificationResult => {
+    const tail = text.slice(-500);
+
+    // Permission/approval prompts
+    if (/approve|reject|permission|allow|confirm/i.test(tail)) {
+      return {
+        type: 'notification',
+        notificationType: 'permission_prompt',
+      };
+    }
+
+    // Idle/ready prompts (slash-command hint shows in Letta's input footer)
+    if (/Press\s+Tab|\/help|\/connect|\/model|\/agents/i.test(tail)) {
+      return {
+        type: 'notification',
+        notificationType: 'idle_prompt',
+      };
+    }
+
+    if (/letta\s*>|^>\s*$/im.test(tail)) {
+      return {
+        type: 'notification',
+        notificationType: 'idle_prompt',
+      };
+    }
+
+    // Auth success (e.g. /connect flow)
+    if (/Successfully authenticated|Connected to|Login successful/i.test(text)) {
+      return {
+        type: 'notification',
+        notificationType: 'auth_success',
+      };
+    }
+
+    // Questions/elicitation
+    if (/What.*\?|How.*\?|Which.*\?|Please (provide|specify|clarify)/i.test(tail)) {
+      return {
+        type: 'notification',
+        notificationType: 'elicitation_dialog',
+      };
+    }
+
+    // Error detection
+    if (/error:|fatal:|exception|failed/i.test(text)) {
+      return {
+        type: 'error',
+      };
+    }
+
+    return undefined;
+  });
+}

src/main/core/conversations/impl/agent-command.ts

@@ -116,6 +116,8 @@ export function buildAgentCommand({
     }
   } else if (providerConfig?.sessionIdFlag) {
     args.push(...parseArgField(providerConfig.sessionIdFlag), sessionId);
+  } else if (!isResuming && providerDef?.newConversationFlag) {
+    args.push(providerDef.newConversationFlag);
   }
 
   if (autoApprove && providerConfig?.autoApproveFlag) {

src/renderer/lib/providers/meta.ts

@@ -18,6 +18,7 @@ import junieIcon from '@/assets/images/junie-color.png';
 import kilocodeIcon from '@/assets/images/kilocode.png';
 import kimiIcon from '@/assets/images/kimi.png';
 import kiroIcon from '@/assets/images/kiro.png';
+import lettaIcon from '@/assets/images/letta.svg?raw';
 import mistralIcon from '@/assets/images/mistral.png';
 import openaiIcon from '@/assets/images/openai.svg?raw';
 import opencodeIcon from '@/assets/images/opencode.png';
@@ -46,6 +47,7 @@ const ICONS: Record<string, string> = {
   'kimi.png': kimiIcon,
   'kilocode.png': kilocodeIcon,
   'kiro.png': kiroIcon,
+  'letta.svg': lettaIcon,
   'atlassian.png': atlassianIcon,
   'cline.png': clineIcon,
   'continue.png': continueIcon,

src/renderer/utils/agentConfig.ts

@@ -19,6 +19,7 @@ import junieLogo from '../../assets/images/junie-color.png';
 import kilocodeLogo from '../../assets/images/kilocode.png';
 import kimiLogo from '../../assets/images/kimi.png';
 import kiroLogo from '../../assets/images/kiro.png';
+import lettaLogoSvg from '../../assets/images/letta.svg?raw';
 import mistralLogo from '../../assets/images/mistral.png';
 import openaiLogoSvg from '../../assets/images/openai.svg?raw';
 import opencodeLogo from '../../assets/images/opencode.png';
@@ -51,6 +52,13 @@ export const agentConfig: Record<AgentProviderId, AgentInfo> = {
   goose: { name: 'Goose', logo: gooseLogo, alt: 'Goose CLI' },
   kimi: { name: 'Kimi', logo: kimiLogo, alt: 'Kimi CLI' },
   kilocode: { name: 'Kilocode', logo: kilocodeLogo, alt: 'Kilocode CLI' },
+  letta: {
+    name: 'Letta',
+    logo: lettaLogoSvg,
+    alt: 'Letta Code CLI',
+    isSvg: true,
+    invertInDark: true,
+  },
   kiro: { name: 'Kiro', logo: kiroLogo, alt: 'Kiro CLI' },
   cline: { name: 'Cline', logo: clineLogo, alt: 'Cline CLI' },
   continue: { name: 'Continue', logo: continueLogo, alt: 'Continue CLI' },

src/shared/agent-provider-registry.ts

@@ -23,6 +23,7 @@ export const AGENT_PROVIDER_IDS = [
   'mistral',
   'junie',
   'pi',
+  'letta',
   'autohand',
 ] as const;
 
@@ -56,6 +57,12 @@ export type AgentProviderDefinition = {
    * e.g. '--session-id' for Claude Code.
    */
   sessionIdFlag?: string;
+  /**
+   * CLI flag for providers whose default invocation auto-resumes the last
+   * conversation (e.g. `letta --new`). Emitted only when starting a fresh
+   * session and the provider has no sessionIdFlag to address by ID.
+   */
+  newConversationFlag?: string;
   defaultArgs?: string[];
   planActivateCommand?: string;
   autoStartCommand?: string;
@@ -466,6 +473,27 @@ export const AGENT_PROVIDERS: AgentProviderDefinition[] = [
     alt: 'Pi CLI',
     terminalOnly: true,
   },
+  {
+    id: 'letta',
+    name: 'Letta',
+    description:
+      'Memory-first coding agent CLI with persistent agents that learn across sessions and portable memory across models.',
+    docUrl: 'https://docs.letta.com/letta-code/cli',
+    installCommand: 'npm install -g @letta-ai/letta-code',
+    commands: ['letta'],
+    versionArgs: ['--version'],
+    cli: 'letta',
+    autoApproveFlag: '--yolo',
+    initialPromptFlag: '',
+    // Bare `letta` auto-resumes the cwd's last conversation; `--new` is
+    // required to start a fresh one when emdash spins up a new chat.
+    newConversationFlag: '--new',
+    useKeystrokeInjection: true,
+    icon: 'letta.svg',
+    alt: 'Letta Code CLI',
+    invertInDark: true,
+    terminalOnly: true,
+  },
   {
     id: 'autohand',
     name: 'Autohand Code',