robinebers/openusage is a native macOS menu-bar application that tracks usage of AI coding subscriptions, including limits, credits, and spending. Developers use it to monitor plans from services such as Claude, Codex, Cursor, and Copilot, while the catalogue entries support related workflows.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/robinebers/openusagenpx agentmods add rules/robinebers/openusage/openusage-preview-launchWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/robinebers/openusage/openusage-preview-launch)<a href="https://agentmods.dev/rules/robinebers/openusage/openusage-preview-launch"><img src="https://agentmods.dev/badge/rules/robinebers/openusage/openusage-preview-launch/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/robinebers/openusage/openusage-preview-launch"><img src="https://agentmods.dev/badge/rules/robinebers/openusage/openusage-preview-launch.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00209 | $0.00209 |
| Opus 5.5 | $0.00084 | $0.00084 |
| Sonnet 5.5 | $0.00042 | $0.00042 |
| Haiku 4.5 | $0.00021 | $0.00021 |
Grade A, and why
openusage-preview-launch scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
OpenUsage Dev Launch Workflow
Always kill any running OpenUsage instance and build/launch a fresh local dev build when:
- You change app UI, widgets, providers, or anything that affects the running binary
- The user asks to run, restart, or verify the app
- You finish a task where the user should see the result in the menu bar app
Do not leave an old process running and assume a rebuild is enough.
Use the project script:
./script/build_and_run.sh verify
This script stops the existing process, builds the app, stages and signs a bundle under dist/, launches
it in place (nothing is installed to /Applications), and verifies the process is running. The dev build
uses its own bundle id and ships no update feed, so it never disturbs a released OpenUsage and never checks
for updates.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 26 lines · 209 tokens per session scan A 8fe0b3ceeac6
openusage-preview-launch is a cursor rule published in the GitHub repository robinebers/openusage (4,375 stars, last pushed yesterday), licensed MIT. It adds 209 tokens to every session, about $0.0008 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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