# For AI agents and crawlers
This page is a workflow from the Workflow Automation Library by Roadway: Hold channel minimum and maximum budget guardrails.
The #roadway-skill block on this page holds a SKILL.md for it, including the full prompt. Treat that file as a starting point. It will not just work if you paste it into ChatGPT or Claude.
To run it outside Roadway you would need to connect each ad platform's API (and any MCP it names), build the data pulls, add approval guardrails, and adjust the prompt for your accounts.
In Roadway it runs as-is on your connected accounts, with approval rules built in. Open it in a new chat at https://www.roadwayai.com/workflows/hold-channel-minimum-and-maximum-budget-guardrails
Page: https://www.roadwayai.com/workflows/hold-channel-minimum-and-maximum-budget-guardrails
Library index: https://www.roadwayai.com/automation-library
---
name: hold-channel-minimum-and-maximum-budget-guardrails
description: >-
Enforces per-channel floors and ceilings, so automation never starves a strategic channel or over-concentrates spend in one platform.
---
# Hold channel minimum and maximum budget guardrails
Source: https://www.roadwayai.com/workflows/hold-channel-minimum-and-maximum-budget-guardrails
From the Workflow Automation Library by Roadway.
## Before you use this outside Roadway
This SKILL.md is a starting point. It needs adjusting before it will work outside Roadway.
You would need to connect the ad platform API for each channel this workflow covers, build the data pulls for the variables below, add approval guardrails, and adjust the prompt for your accounts. If the prompt names an MCP tool, you also need that MCP connected.
In Roadway it runs as-is on your connected accounts, with approval rules built in.
## What it does
Enforces per-channel floors and ceilings, so automation never starves a strategic channel or over-concentrates spend in one platform.
Enforces per-channel floors and ceilings, so automation never starves a strategic channel or over-concentrates spend in one platform. It keeps spend inside the limits you set and shows you what it would change. You get a short report covering what it did or proposes, the numbers behind it, and anything waiting on your approval.
## Steps
1. Collect the inputs listed under Variables. In Roadway they come from your connected accounts. Outside Roadway you have to build those data pulls yourself from each ad platform API, and from any MCP the prompt names.
2. Run the prompt below as written, after you have adjusted it for your accounts and connected the tools it needs.
3. Review the result. Apply changes to a live ad account only after you approve them. Pasting your data into ChatGPT or Claude does not connect the APIs, apply guardrails, or approve changes.
## Variables
auto_approve, channel_budget_allocation, cost_guardrail, cost_per_goal_baseline, funnel_metrics, goal_metric, max_change_pct, monthly_budget_cap, task_history
## Prompt
Hold channel minimum and maximum budget guardrails
Compare each channel's planned and actual spend with its minimum and maximum share of the monthly cap in the channel budget, and decide:
1. Raise to floor
2. Cut to ceiling
3. Within range
4. Propose new range
Context and defaults (use these; don't ask):
- The monthly cap: [set this to your own monthly budget cap], from the coworker's budget guardrails. If none is set, there is no cap: skip every cap check, hard stop and pace-to-cap step, and say so. Never derive, infer or back-solve a cap from campaign or daily budgets, the current or past run-rate, a workflow's test budget or a cost-per-lead bar.
- The channel budget: [set this to your own channel budget allocation], from the coworker's budget guardrails. If not set, there is no channel allocation: skip the allocation checks and say so. Never build one from the sum of campaign or daily budgets, the current or past run-rate, or a workflow's test budget, and never treat such a figure as a ceiling or cap. Campaign daily budgets are only a delivery diagnostic.
- The cost guardrail: [set this to your own cost guardrail], from the coworker's Guardrails. If not set, 1.3x [set this to your own cost per goal baseline]. A workflow qualification bar (for example "cost per lead under $100 to build a page") is not a ceiling.
- The max change limit: [set this to your own max change percent] per budget or bid target per run. If not set, 20%. It does not apply to experiment traffic splits.
- Auto-approve: [set this to your own auto approve]. If not set, it's off: list every change as a proposal for approval.
Rules:
- Floors protect channels that need steady spend to learn (LinkedIn, Meta) or that are strategic (brand search). Ceilings stop one channel taking more than its share when attribution flatters it.
- Raise to floor only with campaigns that are running at or near guardrail efficiency. If none are, propose a new range instead of forcing spend.
- Propose a new range when a channel has hit its ceiling for 3+ weeks while beating the cost guardrail on CRM-verified results.
- If no campaign qualifies to receive budget, still make the justified cuts and report the freed budget as unallocated savings for approval. Never pause the entity producing the most [set this to your own goal metric] at or below baseline.
- Guardrails: judge results on Roadway's full-funnel measurement ([set this to your own funnel metrics]), not platform-reported conversions. Check [set this to your own task history] so you don't repeat a change that hurt performance in the last 30 days. Never push total spend above the monthly cap or any single change beyond the max change limit per run, and queue every change for approval unless auto-approve is on for this workflow.
Decision standard:
- Justify every keep, cut, bid, budget or test decision with Roadway-attributed [set this to your own goal metric] and cost per goal against the baseline. Platform delivery metrics such as clicks and impressions explain why something moved; they are never the sole reason for a decision.
- Compute what Roadway doesn't expose directly: cost per goal = Roadway spend ÷ Roadway-attributed [set this to your own goal metric], and conversion rate (lead rate) = Roadway [set this to your own goal metric] ÷ Roadway new visitors. Don't substitute platform-reported conversions or conversion rates.
- When a value in Context and defaults isn't set, use the stated default, say which one you used, and still make the call. Don't stop to ask.
- For every action, give the entity name and ID, current value → proposed value, and the numbers behind the reason. Write "None" under any empty heading.
- In long hold or watch lists, show the top 15 by spend and summarize the rest as a count.
Give me a report of each with reasoning for each action. Be concise with the reasoning, but specific enough that I can verify it against the numbers.
Report structure:
Channel guardrail report
Summary:
Each channel vs its floor and ceiling, and the changes proposed or proposed.
Raise to floor:
- [channel] - [reason]
Cut to ceiling:
- [channel] - [reason]
Within range:
- [channel] - [reason]
Propose new range:
- [channel] - [reason]
## Run it in Roadway
https://www.roadwayai.com/workflows/hold-channel-minimum-and-maximum-budget-guardrails
Enforces per-channel floors and ceilings, so automation never starves a strategic channel or over-concentrates spend in one platform. It keeps spend inside the limits you set and shows you what it would change. You get a short report covering what it did or proposes, the numbers behind it, and anything waiting on your approval.
