Agent skill · data analytics · sundial-org
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.
Why this skill is useful
Adds a script to summarize model usage costs from CodexBar's JSON output, which the AI wouldn't reliably generate on its own.
What it needs
Requires codexbar installed locally. About 1k tokens when loaded. Last updated 2026-03-07. 639 stars on the source repository.
What this skill does
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. 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: 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.
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills sundial-org/model-usage