model-usage

Original source / Raw SKILL.md

---
name: model-usage
description: 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.
metadata: {"moltbot":{"emoji":"📊","os":["darwin"],"requires":{"bins":["codexbar"]},"install":[{"id":"brew-cask","kind":"brew","cask":"steipete/tap/codexbar","bins":["codexbar"],"label":"Install CodexBar (brew cask)"}]}}
---

# Model usage

## Overview
Get per-model usage cost from CodexBar's local cost logs. Supports "current model" (most recent daily entry) or "all models" summaries for Codex or Claude.

TODO: add Linux CLI support guidance once CodexBar CLI install path is documented for Linux.

## Quick start
1) Fetch cost JSON via CodexBar CLI or pass a JSON file.
2) Use the bundled script to summarize by model.

```bash
python {baseDir}/scripts/model_usage.py --provider codex --mode current
python {baseDir}/scripts/model_usage.py --provider codex --mode all
python {baseDir}/scripts/model_usage.py --provider claude --mode all --format json --pretty
```

## Current model logic
- Uses the most recent daily row with `modelBreakdowns`.
- Picks the model with the highest cost in that row.
- Falls back to the last entry in `modelsUsed` when breakdowns are missing.
- Override with `--model <name>` when you need a specific model.

## Inputs
- Default: runs `codexbar cost --format json --provider <codex|claude>`.
- File or stdin:

```bash
codexbar cost --provider codex --format json > /tmp/cost.json
python {baseDir}/scripts/model_usage.py --input /tmp/cost.json --mode all
cat /tmp/cost.json | python {baseDir}/scripts/model_usage.py --input - --mode current
```

## Output
- Text (default) or JSON (`--format json --pretty`).
- Values are cost-only per model; tokens are not split by model in CodexBar output.

## References
- Read `references/codexbar-cli.md` for CLI flags and cost JSON fields.


---

## Referenced Files

> The following files are referenced in this skill and included for context.

### references/codexbar-cli.md

```markdown
# CodexBar CLI quick ref (usage + cost)

## Install
- App: Preferences -> Advanced -> Install CLI
- Repo: ./bin/install-codexbar-cli.sh

## Commands
- Usage snapshot (web/cli sources):
  - codexbar usage --format json --pretty
  - codexbar --provider all --format json
- Local cost usage (Codex + Claude only):
  - codexbar cost --format json --pretty
  - codexbar cost --provider codex|claude --format json

## Cost JSON fields
The payload is an array (one per provider).
- provider, source, updatedAt
- sessionTokens, sessionCostUSD
- last30DaysTokens, last30DaysCostUSD
- daily[]: date, inputTokens, outputTokens, cacheReadTokens, cacheCreationTokens, totalTokens, totalCost, modelsUsed, modelBreakdowns[]
- modelBreakdowns[]: modelName, cost
- totals: totalInputTokens, totalOutputTokens, cacheReadTokens, cacheCreationTokens, totalTokens, totalCost

## Notes
- Cost usage is local-only. It reads JSONL logs under:
  - Codex: ~/.codex/sessions/**/*.jsonl
  - Claude: ~/.config/claude/projects/**/*.jsonl or ~/.claude/projects/**/*.jsonl
- If web usage is required (non-local), use codexbar usage (not cost).

```