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 skills add madebyaris/cursor-composer-rules --skill senior-practicesgit clone --depth 1 https://github.com/madebyaris/cursor-composer-rulesWrote 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/skills/madebyaris/cursor-composer-rules/senior-practices)<a href="https://agentmods.dev/skills/madebyaris/cursor-composer-rules/senior-practices"><img src="https://agentmods.dev/badge/skills/madebyaris/cursor-composer-rules/senior-practices.svg" alt="Measured on agentmods" 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 | $0.00059 | $0.00957 |
| Opus 5 | $0.00030 | $0.00478 |
| Sonnet 5 | $0.00012 | $0.00191 |
| Haiku 4.5 | $0.00006 | $0.00096 |
Grade A, and why
senior-practices 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Senior practices skill
Companion to .cursor/rules/composer-senior-practices.mdc. Load when external, current guidance is needed — not when matching an obvious local pattern suffices.
For multi-vendor audits or contradictory literature, pair with deep-research. For applying findings without scope creep, follow composer-coding-excellence § Style governance.
See reference.md for compact repeatable checklists.
Operating stance
Training data is a hypothesis until anchored to this repo's versions and T1 sources. Prefer falsification: check deprecations, breaking changes, and "do not use" guidance before recommending a pattern. Recollection without a primary source stays [H] until inspected.
Do not imitate private chain-of-thought. Make the work inspectable: version inventory, source list, reconciled recommendations, and apply-now vs follow-up split.
Phase A — Inventory (this repo)
- Read manifests:
package.json,go.mod,Cargo.toml,pyproject.toml,Gemfile, etc. - Record exact versions of the framework, runtime, and relevant libraries.
- Note existing project standards: eslint/prettier, ADRs, README, CI config.
- Scan how similar problems are already solved in this codebase (2–3 examples).
If versions cannot be determined, say so and label recommendations [H] until anchored.
Phase B — Anchor (T1 primary)
For each decision point:
- Open official docs keyed to the pinned version (not "latest" unless the repo tracks latest).
- Read release notes / migration guides for the version span in use.
- Check security advisories when the change touches auth, crypto, input, or dependencies.
Draft a short coverage note: what T1 says, what is deprecated, what the repo currently does.
Phase C — Corroborate (T2/T3, sparingly)
Add T2/T3 sources only when T1 is silent on the specific decision:
- Platform owner guides (Vercel, Cloudflare, etc.) matched to deployment target.
- Maintainer conference talks or engineering blogs when they align with T1 or include reproducible examples.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 107 lines · 59 tokens per session scan A 5b17a4bfecb7
senior-practices is a skill published in the GitHub repository madebyaris/cursor-composer-rules (3 stars, last pushed 20d ago), licensed MIT. It adds 59 tokens to every session and 957 once invoked, about $0.0003 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 2026-08-31.
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