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AmirulAndalib
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model-usage

Summarize CodexBar local cost logs by model for Codex or Claude providers.

Updated Jun 19, 2026
Search Tags:#codex#claude#json#cost tracking#model usage#codexbar#usage summary
One-click install
npx skills add https://github.com/AmirulAndalib/Vilvona-AI --skill model-usage-amirulandalib
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: model-usage
Source: https://github.com/AmirulAndalib/Vilvona-AI/tree/main/skills/model-usage
Command: npx skills add https://github.com/AmirulAndalib/Vilvona-AI --skill model-usage-amirulandalib

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve? Tracking per-model AI spending requires manually parsing CodexBar's raw cost JSON logs. This Skill automates that analysis, turning local Codex and Claude usage logs into clear per-model cost summaries. ## Core Features & Use Cases - Current Model Detection: Identifies the most recently used model from daily breakdowns, picking the highest-cost model in the latest daily row with fallback to modelsUsed entries. - All-Models Aggregation: Aggregates total cost per model across daily rows, with optional filtering to the last N days. - Flexible Input and Output: Reads live CodexBar CLI output on macOS or accepts exported JSON via file/stdin on any platform, and renders results as text or JSON. - Use Case: A developer wants to know which Claude model cost the most this week. They run the summarizer with --provider claude --mode all --days 7 and get a ranked per-model cost breakdown. ## Quick Start Ask the assistant to summarize your current Codex model usage cost from CodexBar, optionally specifying the provider, mode, or a JSON input file.

Frequently Asked Questions about model-usage

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check per-model cost usage with CodexBar?▼

Run the bundled model_usage.py script with --provider codex or claude and --mode current or all. It invokes codexbar cost --format json and summarizes costs per model from the daily modelBreakdowns entries.

How to summarize CodexBar cost JSON from a file?▼

Pass the exported JSON with --input /path/to/cost.json, or pipe it via stdin using --input -. This mode works on any platform with Python, without needing the CodexBar CLI installed.

Does CodexBar cost tracking work on Linux or Windows?▼

Live CodexBar CLI invocation is documented for macOS only. On Linux or other platforms, export the cost JSON on a Mac and use --input mode, which works anywhere Python is available.

Can I filter model usage costs to the last N days?▼

Yes, use the --days flag with a positive integer to limit aggregation to recent daily rows. Entries older than the cutoff date are excluded from both current-model detection and all-model totals.

Why does the script report no model data found?▼

This happens when the CodexBar payload contains no daily rows with modelBreakdowns or modelsUsed entries. Verify that codexbar cost --format json returns daily data and that local JSONL session logs exist for the selected provider.

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