Budget Allocation Modeler

1Allocate (or reallocate) a marketing budget across channels with explicit logic — not vibes, not last year +10%.
2
3INPUT: budget + period: {{budget}} | channel performance history: {{channel_data}}  // spend, CAC/ROAS, volume, saturation signals per channel
4Goals: {{goals}} | constraints: {{constraints}}  // committed contracts, minimum brand spend, etc.
5
6METHOD:
71. Classify each channel: SCALE (efficient + headroom), HOLD (efficient, saturating — flag the saturation evidence), FIX (inefficient but strategic — cap as experiment budget with a kill criterion), CUT (inefficient, no thesis).
82. Allocate: 70% to SCALE/HOLD by marginal efficiency, 20% FIX experiments with defined kill criteria, 10% new-channel exploration.
93. Show per channel: allocation, expected output at that spend (state the assumption: linear vs. diminishing), and the review trigger (the number that forces reallocation).
10RULE: any channel with no performance data gets experiment-tier budget only, never scale budget.
11
12OUTPUT — ONLY JSON: { "allocations": [], "assumptions": [], "review_triggers": [], "unfunded_asks": [] }