refactor: align add command with clean CLI separation pattern

src/add/add.ts

@@ -86,7 +86,6 @@ export async function runAdd(options: AddOptions): Promise<AddResult> {
     const proceed = await warnAboutCDNPricingLimitations()
     if (!proceed) {
       cancel('Add cancelled')
-      process.exitCode = 1
       throw new Error('CDN pricing limitations warning cancelled')
     }
   }
@@ -101,7 +100,7 @@ export async function runAdd(options: AddOptions): Promise<AddResult> {
     if (!pathValidation.exists || !pathValidation.stats) {
       spinner.stop(`${pc.red('✗')} ${pathValidation.error}`)
       cancel('Add cancelled')
-      process.exit(1)
+      throw new Error(pathValidation.error)
     }
 
     const pathStat = pathValidation.stats
@@ -247,6 +246,6 @@ export async function runAdd(options: AddOptions): Promise<AddResult> {
     }
 
     cancel('Add failed')
-    process.exit(1)
+    throw error
   }
 }

src/commands/add.ts

@@ -30,8 +30,7 @@ export const addCommand = new Command('add')
       }
 
       await runAdd(addOptions)
-    } catch (error) {
-      console.error('Add failed:', error instanceof Error ? error.message : error)
+    } catch {
       process.exit(1)
     }
   })

src/test/unit/add.test.ts

@@ -233,51 +233,45 @@ describe('Add Command', () => {
     })
 
     it('should reject when file does not exist', async () => {
-      const mockExit = vi.spyOn(process, 'exit').mockImplementation(() => {
-        throw new Error('process.exit called')
-      })
+      const mockExit = vi.spyOn(process, 'exit')
 
       await expect(
         runAdd({
           filePath: '/non/existent/file.txt',
           privateKey: 'test-key',
         })
-      ).rejects.toThrow('process.exit called')
+      ).rejects.toThrow('Path not found')
 
-      expect(mockExit).toHaveBeenCalledWith(1)
+      expect(mockExit).not.toHaveBeenCalled()
       mockExit.mockRestore()
     })
 
     it('should reject when private key is missing', async () => {
-      const mockExit = vi.spyOn(process, 'exit').mockImplementation(() => {
-        throw new Error('process.exit called')
-      })
+      const mockExit = vi.spyOn(process, 'exit')
 
       await expect(
         runAdd({
           filePath: testFile,
           // No private key
         })
-      ).rejects.toThrow('process.exit called')
+      ).rejects.toThrow()
 
-      expect(mockExit).toHaveBeenCalledWith(1)
+      expect(mockExit).not.toHaveBeenCalled()
       mockExit.mockRestore()
     })
 
     it('should reject --bare flag with directories', async () => {
-      const mockExit = vi.spyOn(process, 'exit').mockImplementation(() => {
-        throw new Error('process.exit called')
-      })
+      const mockExit = vi.spyOn(process, 'exit')
 
       await expect(
         runAdd({
           filePath: testDir, // Directory
           privateKey: 'test-key',
           bare: true, // --bare flag should not work with directories
         })
-      ).rejects.toThrow('process.exit called')
+      ).rejects.toThrow('--bare flag is not supported for directories')
 
-      expect(mockExit).toHaveBeenCalledWith(1)
+      expect(mockExit).not.toHaveBeenCalled()
       mockExit.mockRestore()
     })
   })