NeutronStar714

Agent Cost Monitor — Productivity skill for Claude Code

Productivity community

Keep track of your API usage in real time.

How to install Agent Cost Monitor

This entry records only its repository, not the path inside it, so there is no exact command to give. Open NeutronStar714/agent-cost-monitor and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Agent Cost Monitor does

Keep track of your API usage in real time! A cross-platform plugin that records estimated cost for turns, sessions and cost rate ("Burn"), for Claude Code (desktop+CLI), Codex (desktop+CLI) and dsh-tui. Search "dsh-budget-watcher" for the DSH plugin

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README

![agent-cost-monitor](assets/header.svg)

Live cost and burn rate for AI coding agents, wherever the agent shows you something.

Claude Code CLI gets a status line — one row, redrawn in place.
Everything else — Codex, DSH, or Claude Code when you want the picture rather than a number — gets a Tauri window: a small always-on-top widget with the same figures and a burn chart.

That status line is the *only* place this project is a single row, and it is **Claude Code CLI only**:

¥0.53 / ¥19.72 · β(t) ¥0.00/h · β ¥5.94/h · 5:21

The figures, and what β means

**β is burn** — currency spent *per hour*. It is a rate, never a total: it answers "how fast is this costing me right now", which is the question a running agent makes urgent.


`¥0.53`	this turn — what the current turn has cost so far
`¥19.72`	this session — every turn in the conversation
`β(t)`	live burn — what the last `burnWindowMs` (15 s by default) cost, projected to an hour. Falls to zero when nothing is being spent; it is a trailing window, so it drops as calls age out
`β`	average burn — this turn's cost divided by this turn's own duration
`5:21`	this turn's elapsed time — it stops when the turn stops

Precisely: every figure is computed from the token usage the host records — input, output, and the cache-read/write split kept separate — priced per million tokens against a fetched rate card, with DeepSeek's peak/off-peak periods applied and USD→CNY converted at the ECB daily rate. Nothing is measured or estimated from wall-clock time; an unpriced model contributes nothing rather than a guess.

Install

npm install -g agent-cost-monitor     # puts `acm` on your PATH
acm install                           # Claude Code status line, /acm, config
acm hook on                           # start the window when a session starts

Requires Node 20+ (22.5+ for the Codex SQLite cross-check). The window is **Wi