Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/robinebers/openusage/openusage-preview-launchgit clone --depth 1 https://github.com/robinebers/openusageWhat 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 | $0.00209 | $0.00209 |
| Opus 5 | $0.00105 | $0.00105 |
| Sonnet 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 yesterday.
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.
- yesterday 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 (3,954 stars, last pushed 3d ago), licensed MIT. It adds 209 tokens to every session, about $0.0010 per session on Opus 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.
Other cursor rules, from other repositories
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Below is an example test. Notice the following.
python-app
Cursor rule "python-app" from iloveitaly/llm-ide-rules, covering python app, factories and database & orm.
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Cursor rule "react" from iloveitaly/llm-ide-rules, covering react, mock data, react hook form and styling.
alembic-migrations
To add a non-nullable column and set a specific value for all existing rows without a persistent server default.
read-xlsx
Reading, writing, diffing, and repairing spreadsheets (.xlsx) for AI agents via the xfa MCP server.
cursorrules
═══════════════════════════════════════════════════════════ SPEC DRIVEN DEVELOPMENT — PROJECT CONSTITUTION Project: Freelance Time Tracker Version: v1.0.