# tare

> Same work, fewer tokens, with the receipt. Tare reads the session logs Claude Code keeps on disk,
> prices every API call at list prices, shows where the tokens and money went, installs cache-safe
> fixes, and measures cost per commit before and after. Local, free, never calls a model.

Status: v0.1.0, open source (Apache-2.0). Install: npx tarelab. Source: https://github.com/priberry-data/tarelab. Contact: hello@priberry.com. Built by Priberry (also makes Crumple, https://crumple.priberry.com).

## Commands
- `tare` (or `tare wrapped`): spend and attribution for the last 30 days. `--days N`, `--all`, `--json`.
- `tare card`: shareable 1200x630 card (SVG, PNG download) and post text. Nothing is uploaded.
- `tare fix [--dry-run] [--undo] [--scope user|project]`: PostToolUse output trim for Bash, and a status line with a cache-warm countdown. Backs up settings first.
- `tare receipt`: cost per commit before vs after the fixes, 90% bootstrap range, finish rate check; "not enough data" under 8 finished sessions per side.
- `tare mcp`: MCP server over stdio. Tools: tare_wrapped, tare_receipt, tare_cache.

## Terms
- API-equivalent: what the work would cost at Anthropic API list prices; subscriptions are billed flat.
- Carry cost: a tool output's cost of staying in context: one cache write, then a cache read on every later call until compaction.
- Coffee-break tax: the prompt cache expires after 5 minutes idle (1 hour on the long cache), so the next call rewrites the whole context.