fix(commands): use dynamic base branch and safe rollback in remove-ai-slops

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

bun-test.d.ts

@@ -12,6 +12,7 @@ declare module "bun:test" {
   }
 
   export function describe(name: string, fn: () => void): void
+  export function test(name: string, fn: () => void | Promise<void>): void
   export function it(name: string, fn: () => void | Promise<void>): void
   export function beforeEach(fn: () => void | Promise<void>): void
   export function afterEach(fn: () => void | Promise<void>): void
@@ -28,6 +29,8 @@ declare module "bun:test" {
 
   interface Matchers {
     toBe(expected: unknown): void
+    toBeDefined(): void
+    toBeUndefined(): void
     toBeNull(): void
     toEqual(expected: unknown): void
     toContain(expected: unknown): void