# Model Usage

> Use CodexBar CLI local cost usage to summarize per-model usage for Codex or Claude, including the current (most recent) model or a full model breakdown. Trigger when asked for model-level usage/cost data from codexbar, or when you need a scriptable per-model summary from codexbar cost JSON.

- Skill: `cowork-os/model-usage` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add cowork-os/model-usage`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cowork-os/model-usage/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: cowork-os (https://skillmd.com/u/cowork-os)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cowork-os/model-usage

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# Model-usage

## Purpose

Use CodexBar CLI local cost usage to summarize per-model usage for Codex or Claude, including the current (most recent) model or a full model breakdown. Trigger when asked for model-level usage/cost data from codexbar, or when you need a scriptable per-model summary from codexbar cost JSON.

## Routing

- Use when: Use when the user asks to use CodexBar CLI local cost usage to summarize per-model usage for Codex or Claude, including the current most recent model or a full model breakdown. Trigger when asked for model-level usage/cost data from codexbar, or when you need a scriptable per-model summary from codexbar cost JSON.
- Do not use when: Do not use when the request is asking for planning documents, high-level strategy, or non-executable discussion; use the relevant planning or design workflow instead.
- Outputs: Outcome from Model-usage: task-specific result plus concrete action notes.
- Success criteria: Returns concrete actions and decisions matching the requested task, with no fabricated tool-side behavior.

## Trigger Examples

### Positive

- Use the model-usage skill for this request.
- Help me with model-usage.
- Use when the user asks to use CodexBar CLI local cost usage to summarize per-model usage for Codex or Claude, including the current most recent model or a full model breakdown. Trigger when asked for model-level usage/cost data from codexbar, or when you need a scriptable per-model summary from codexbar cost JSON.
- Model-usage: provide an actionable result.

### Negative

- Do not use when the request is asking for planning documents, high-level strategy, or non-executable discussion; use the relevant planning or design workflow instead.
- Do not use model-usage for unrelated requests.
- This request is outside model-usage scope.
- This is conceptual discussion only; no tool workflow is needed.

## Runtime Prompt

- Current runtime prompt length: 1495 characters.
- Runtime prompt is defined directly in `../model-usage.json`.