fix: require a model, default to empty value during onboarding

and add a WORKSPACE_PATH constant to make tracking that path easier

src/cli/onboard.ts

@@ -3,6 +3,7 @@ import { join } from 'node:path';
 import { Command } from 'commander';
 import pc from 'picocolors';
 import { ConfigSchema, type Config } from '../config/types.ts';
+import { WORKSPACE_PATH } from '../config/constants.ts'
 import { ensureWorkspace, resolvePath, checkWorkspaceEmpty, syncTemplates } from './utils.ts';
 
 function logCreated(item: string) {
@@ -15,9 +16,14 @@ export function onboardCommand(program: Command): void {
     .description('Initialize a new nanobot workspace with config and templates')
     .action(async (rawPath?: string) => {
       try {
-        const defaultConfig: Config = ConfigSchema.parse({});
+        const defaultConfig: Config = ConfigSchema.parse({
+          agent: {
+            provider: '',
+            model: '',
+          }
+        });
 
-        const targetPath = resolvePath(rawPath ?? defaultConfig.agent.workspacePath);
+        const targetPath = resolvePath(rawPath ?? WORKSPACE_PATH);
         const configPath = join(targetPath, 'config.json');
 
         console.info(pc.blue('Initializing nanobot workspace...'));

src/config/constants.ts

@@ -0,0 +1 @@
+export const WORKSPACE_PATH = '~/.config/nanobot'

src/config/loader.ts

@@ -3,6 +3,7 @@ import { homedir } from 'node:os';
 import { dirname, resolve } from 'node:path';
 import pc from 'picocolors'
 import { type Config, ConfigSchema } from './types.ts';
+import { WORKSPACE_PATH } from './constants.ts'
 
 const DEFAULT_CONFIG_PATH = resolve(homedir(), '.config', 'nanobot', 'config.json');
 

src/config/types.ts

@@ -1,4 +1,5 @@
 import { z } from 'zod';
+import { WORKSPACE_PATH } from './constants.ts'
 
 // ---------------------------------------------------------------------------
 // Mattermost
@@ -41,7 +42,7 @@ export type ChannelsConfig = z.infer<typeof ChannelsConfigSchema>;
 
 export const AgentConfigSchema = z.object({
   model: z.string().default('anthropic/claude-sonnet-4-5'),
-  workspacePath: z.string().default('~/.config/nanobot'),
+  workspacePath: z.string().default(WORKSPACE_PATH),
   maxTokens: z.number().int().default(4096),
   contextWindowTokens: z.number().int().default(65536),
   temperature: z.number().default(0.7),
@@ -113,14 +114,7 @@ export type HeartbeatConfig = z.infer<typeof HeartbeatConfigSchema>;
 
 export const ConfigSchema = z.object({
   providers: ProvidersConfigSchema.default(() => ({})),
-  agent: AgentConfigSchema.default(() => ({
+  agent: AgentConfigSchema,
-    model: 'anthropic/claude-sonnet-4-5',
-    workspacePath: '~/.config/nanobot',
-    maxTokens: 4096,
-    contextWindowTokens: 65536,
-    temperature: 0.7,
-    maxToolIterations: 40,
-  })),
   heartbeat: HeartbeatConfigSchema.default(() => ({ enabled: false, intervalMinutes: 30 })),
   channels: ChannelsConfigSchema.default(() => ({ sendProgress: true, sendToolHints: true })),
   tools: ToolsConfigSchema.default(() => ({