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 jonathan-vella/apex-accelerator --skill microsoft-skill-creatorgit clone --depth 1 https://github.com/jonathan-vella/apex-acceleratorWrote 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/jonathan-vella/apex-accelerator/microsoft-skill-creator)<a href="https://agentmods.dev/skills/jonathan-vella/apex-accelerator/microsoft-skill-creator"><img src="https://agentmods.dev/badge/skills/jonathan-vella/apex-accelerator/microsoft-skill-creator/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/jonathan-vella/apex-accelerator/microsoft-skill-creator"><img src="https://agentmods.dev/badge/skills/jonathan-vella/apex-accelerator/microsoft-skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 58 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium Prompt Injection · line 180 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00086 | $0.01479 |
| Opus 5 | $0.00043 | $0.00740 |
| Sonnet 5 | $0.00017 | $0.00296 |
| Haiku 4.5 | $0.00009 | $0.00148 |
Grade A, and why
microsoft-skill-creator 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 9d 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 — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Microsoft Skill Creator
Create hybrid skills for Microsoft technologies that store essential knowledge locally while enabling dynamic Learn MCP lookups for deeper details.
This repo convention: After generating skill content with this skill, use the
make-skill-templateskill to ensure the output follows this repo's SKILL.md frontmatter conventions and directory structure (see.github/instructions/agent-skills.instructions.md).
About Skills
Skills are modular packages that extend agent capabilities with specialized knowledge and workflows. A skill transforms a general-purpose agent into a specialized one for a specific domain.
Skill Structure
skill-name/
├── SKILL.md (required) # Frontmatter (name, description) + instructions
├── references/ # Documentation loaded into context as needed
├── sample_codes/ # Working code examples
└── assets/ # Files used in output (templates, etc.)
Key Principles
- Frontmatter is critical:
nameanddescriptiondetermine when the skill triggers — be clear and comprehensive - Concise is key: Only include what agents don't already know; context window is shared
- No duplication: Information lives in SKILL.md OR reference files, not both
Learn MCP Tools
| Tool | Purpose | When to Use |
|---|---|---|
microsoft_docs_search |
Search official docs | First pass discovery, finding topics |
microsoft_docs_fetch |
Get full page content | Deep dive into important pages |
microsoft_code_sample_search |
Find code examples | Get implementation patterns |
CLI Alternative
If the Learn MCP server is not available, use the mslearn CLI via Bash instead:
# Run directly (no install needed)
npx @microsoft/learn-cli search "semantic kernel overview"
# Or install globally, then run
npm install -g @microsoft/learn-cli
mslearn search "semantic kernel overview"
What ships with it
4 files 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.
- 9d ago First seen · 184 lines · 86 tokens per session scan A d3490f2b06c3
microsoft-skill-creator is a skill published in the GitHub repository jonathan-vella/apex-accelerator (50 stars, last pushed yesterday), licensed MIT. It adds 86 tokens to every session and 1,479 once invoked, about $0.0004 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.
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