Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add RevenueCat/play-billing-skills --skill price-changesgit clone --depth 1 https://github.com/RevenueCat/play-billing-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/revenuecat/play-billing-skills/price-changes)<a href="https://agentmods.dev/skills/revenuecat/play-billing-skills/price-changes"><img src="https://agentmods.dev/badge/skills/revenuecat/play-billing-skills/price-changes/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/revenuecat/play-billing-skills/price-changes"><img src="https://agentmods.dev/badge/skills/revenuecat/play-billing-skills/price-changes.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00055 | $0.02286 |
| Opus 5 | $0.00028 | $0.01143 |
| Sonnet 5 | $0.00011 | $0.00457 |
| Haiku 4.5 | $0.00006 | $0.00229 |
Grade A, and why
price-changes scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Google Play Price Changes
Google Play price changes touch three separate systems: the base plan price itself, the legacy price cohorts holding existing subscribers, and the notification and consent flow that migrates those cohorts. You have to operate each one deliberately.
Phase 1: Understand
Know what you are actually changing before you touch any API.
- New subscribers see the new base plan price within a few hours of the patch call. No further work.
- Existing subscribers land in a legacy price cohort and keep paying their original price forever unless you migrate them. Up to 250 cohorts per base plan.
- Offer pricing phases (free trial, intro price) cannot be migrated. A change there only affects new subscribers.
- Installment subscribers under a commitment cannot have their price migrated until the commitment ends.
Two questions drive everything that follows:
- Is the new price higher or lower than the legacy cohort price?
- If higher, do you want opt in (default) or opt out (conditional)?
Phase 2: Plan
Decide opt in vs opt out
Price decreases skip this entirely. They apply automatically with email notification and no consent. The decision matters only for increases.
| Dimension | Opt in increase | Opt out increase |
|---|---|---|
| Subscriber consent | Required. Must accept or subscription auto cancels. | Not required. Silent unless user cancels. |
| Freeze period | 7 days of silence before Google notifies users. | None. Google notifies immediately. |
| Notification lead time | 30 days before the user's first renewal at the new price. | 30 or 60 days depending on country. |
| Effective date | 37 days after initiation (7 day freeze + 30 day notice). | 30 or 60 days after initiation. |
| Regional availability | All regions. | Conditional. Subject to per region rules. |
| Frequency cap | None. | One per base plan per country per 365 day rolling window. |
| Amount cap | None. | Per country maximum increase amount. |
| First time requirement | Can start from the API. | First opt out for the app must start in the Play Console. |
| Failure mode | N/A. | Silently downgrades to opt in if eligibility fails. |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 191 lines · 55 tokens per session scan A 55732185105b
price-changes is a skill published in the GitHub repository RevenueCat/play-billing-skills (53 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 55 tokens to every session and 2,286 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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