Borrowing it
Nothing to install: this file belongs to miroapp/miro-ai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/miroapp/miro-ai/main/.agents/skills/skills-development/SKILL.mdgit clone --depth 1 https://github.com/miroapp/miro-aiWrote 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/miroapp/miro-ai/skills-development)<a href="https://agentmods.dev/skills/miroapp/miro-ai/skills-development"><img src="https://agentmods.dev/badge/skills/miroapp/miro-ai/skills-development.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00034 | $0.00209 |
| Opus 5 | $0.00017 | $0.00105 |
| Sonnet 5 | $0.00007 | $0.00042 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
skills-development 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.
What it actually says
Skills Development
Principles for writing SKILL.md files in this repo:
- Do not duplicate parameter definitions or tool descriptions. Duplication drifts, contradicts the live tools, and steers the agent away from features that work.
- The agent must fetch parameter definitions and tool descriptions from the MCP server directly at call time.
- Do not name specific tools, prefixes, or suffixes. The agent finds them in the MCP tool list.
- Do not name specific parameters either. Describe values in prose
("the board item ID", "the image resource ID") rather than introducing
code-shaped names (
item_id,board_id). Parameter names drift the same way tool names do, and the agent should read the live MCP schema.
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 · 21 lines · 34 tokens per session scan A 817c0a52d399
skills-development is a skill published in the GitHub repository miroapp/miro-ai (151 stars, last pushed 12d ago), licensed MIT. It adds 34 tokens to every session and 209 once invoked, about $0.0002 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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