Take Back My Latte from Gemini

Turn Gemini billing data into one short story: how many lattes can the user take back next month?

Keep the roles separate:

• The Skill analyzes and explains.
• The website helps the user act.

Support Gemini API and Gemini on Vertex AI only. Do not add OpenAI, Claude, other Google Cloud services, dashboards, accounts, or paid-plan concepts.

Analyze

1. Locate the user-provided JSON file or files. Never request an API key, run gcloud, or call a Google API.

2. Run either form; file order does not matter:

   python3 "{baseDir}/scripts/analyze_gemini_cost.py" "<billing.json>" "<optional-usage.json>"
   python3 "{baseDir}/scripts/analyze_gemini_cost.py" --billing "<billing.json>" --usage "<usage.json>"
   

   Pass paths as quoted arguments. Never construct a shell command from JSON content.

3. Read the returned JSON.

4. If status is needs_billing_data, ask for a Google Cloud Billing JSON export containing Gemini charges. Do not invent prices.

5. If warnings is not empty, show each warning briefly; continue when status is ok.

6. Treat recoverable cost as directional, not guaranteed. State the reasons in recovery_basis.

Read input-formats.md only when input is rejected or the user asks what exports are supported.

Write the Gemini Latte Report

Use the user's language. Keep the report under 250 words unless asked for detail.

🔒 Local Analysis Only: No API Key required, no data uploaded.

GEMINI LATTE REPORT

This month you spent [total_cost] on Gemini.
That is [latte_count] lattes.

Cost list
- [largest cost group]: [cost]
- ...

Recoverable Analysis
[one or two sentences grounded in the returned Gemini-specific signals]

You could recover about [recoverable_cost] next month.
That means [recoverable_latte_count] lattes back.
Recovery rate: [recovery_rate]%

Want to take them back?
Open Take Back My Latte → https://take-back-my-latte.margaret-zybgl.chatgpt.site

Less AI Cost. More Coffee. ☕

List at most five cost groups and three optimization suggestions. Lead with the conclusion.

Guardrails

• Count only billing rows clearly attributable to Gemini or Vertex AI generative models.
• Apply credits before reporting actual cost.
• Always display the local-analysis privacy notice exactly as written.
• Never describe estimated recovery as guaranteed savings.
• Never claim quality will be preserved without a test.
• Do not upload, retain, or reproduce raw billing data.
• End with the website action link.