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 hamzabellouch/agent-skills --skill single-variable-calculusgit clone --depth 1 https://github.com/hamzabellouch/agent-skillsWrote 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/hamzabellouch/agent-skills/single-variable-calculus)<a href="https://agentmods.dev/skills/hamzabellouch/agent-skills/single-variable-calculus"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/single-variable-calculus/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/skills/hamzabellouch/agent-skills/single-variable-calculus"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/single-variable-calculus.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 | $0.00023 | $0.00257 |
| Opus 5.5 | $0.00009 | $0.00103 |
| Sonnet 5.5 | $0.00005 | $0.00051 |
| Haiku 4.5 | $0.00002 | $0.00026 |
Grade A, and why
single-variable-calculus 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 7d 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
Single-Variable Calculus
Domain
Limits, derivatives, integrals of one-variable functions.
Core Concepts
- Limits, continuity, differentiability
- Derivatives: rules, chain rule, implicit differentiation
- Integrals: Riemann, fundamental theorem
- Sequences, series, convergence tests
- Taylor and Maclaurin series
Key Methods
- L'Hôpital's rule
- Integration by parts, substitution, partial fractions
- Ratio/root/comparison tests
- Taylor expansion around a point
Canonical Examples
- d/dx [x² sin x] = 2x sin x + x² cos x.
- ∫₀¹ x² dx = 1/3.
- e^x = Σ xⁿ/n! converges everywhere.
Common Pitfalls
- Applying L'Hôpital when limit isn't indeterminate
- Forgetting +C on indefinite integrals
- Misusing convergence tests on divergent series
Related Skills
Real Analysis, Multivariable Calculus, ODEs
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.
- 7d ago First seen · 38 lines · 23 tokens per session scan A ec77a4f98737
single-variable-calculus is a skill published in the GitHub repository hamzabellouch/agent-skills (8 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 257 once invoked, about $0.0001 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 2026-10-10.
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