Use the AI Blocks customer acquisition cost limit and ad-lift test planner in this AI. Read the attached pack's START_HERE.md and SKILL.md. If no pack is attached, call prepare_specialist with {"role_id":"set-your-cac-limit-and-test-what-ads-really-add"} through AI Blocks MCP, or retrieve https://useaiblocks.com/api/v1/specialists/set-your-cac-limit-and-test-what-ads-really-add/pack and read the extracted files.

Start from what I have already said. Ask only the missing essentials: what job I need done, what I want back, and which relevant files, examples, constraints or tools you can use. Keep those answers and work in my chosen local project. Do not invent a task, require a website form, or start every bundled method. If the task is already clear and authorized, proceed with the relevant methods and check the actual deliverables.

Specialist scope: Share ad spend, first-order data and profit assumptions. Get a buyer-cost limit, return checks, an ad-lift test plan and later budget options.

Example only, not my task: Share ad spend, first-order data and profit assumptions. Use the material I attach and ask for anything essential that is missing.

If I ask for a team instead, suggest the smallest suitable set of specialists and explain their responsibilities; let me accept or change them before work starts. An explicitly chosen specialist is already my role choice. The pack supplies instructions, not model tokens, tool connections or background execution.