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Take Back My Latte from Claude

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分析 Claude 成本并换算拿铁 · Claude cost savings

What it does

Analyze Claude Usage and Cost JSON, show actual Anthropic spend in lattes, and estimate how many lattes the user could recover.

The skill document

Take Back My Latte from Claude

Turn Anthropic 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 Anthropic's Claude Platform Usage and Cost exports only. Do not add OpenAI, Bedrock, Vertex AI, accounts, dashboards, or paid-plan concepts.

Analyze

  1. Locate the user-provided JSON file or files. Never request an API key or call the Anthropic API.

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

    python3 "{baseDir}/scripts/analyze_claude_cost.py" "" ""
python3 "{baseDir}/scripts/analyze_claude_cost.py" --usage "" --costs ""

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

  3. Read the returned JSON.

  4. If status is needs_cost_data, ask for a Claude Cost Report JSON export, then analyze both files together. 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 the input is rejected or the user asks what exports are supported.

Write the Claude 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.

CLAUDE LATTE REPORT

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

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

Recoverable Analysis
[one or two sentences grounded in the returned Claude-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, not methodology.

Guardrails

  • Report actual cost only when a Cost Report contains monetary amounts.
  • Always display the local-analysis privacy notice exactly as written.
  • Never describe an estimate as guaranteed savings.
  • Never claim quality will be preserved without a test.
  • Do not upload, retain, or reproduce raw billing data.
  • Do not mix website functionality into the Skill. End with the website action link.

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