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miro-ai: Skill for Claude Code

.agents/skills/skills-development/SKILL.md

skills-development is a skill for Claude Code, Codex from miroapp/miro-ai. It costs 34 tokens per session (209 once invoked), scanned A, original, MIT.

Guidance for writing or revising SKILL.md files, which tell a coding agent how to handle a specific kind of work.

In plain words
What is it for?
Use it when creating or updating skills so they describe the workflow without copying tool names, settings, or parameter definitions.
Why use it?
It helps keep these instructions short and prevents them from becoming inaccurate when connected tools change.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is miroapp/miro-ai's own configuration. It tells Claude Code and Codex how to work on miro-ai itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything miro-ai configures →

not rated 166repo +2 1mo ago A scan SkillSpector: pass 34 tokens original MIT
View source ↗ miroapp/miro-ai
Reuse

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.

Copy the file
curl -O https://raw.githubusercontent.com/miroapp/miro-ai/main/.agents/skills/skills-development/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/miroapp/miro-ai

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for skills-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/miroapp/miro-ai/skills-development/github.svg)](https://agentmods.dev/skills/miroapp/miro-ai/skills-development)
Your own site
<a href="https://agentmods.dev/skills/miroapp/miro-ai/skills-development"><img src="https://agentmods.dev/badge/skills/miroapp/miro-ai/skills-development/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.

agentmods 80×15 button for skills-development

Your own site · 80×15
<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="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 209 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00034 $0.00209
Opus 5.5 $0.00014 $0.00084
Sonnet 5.5 $0.00007 $0.00042
Haiku 4.5 $0.00003 $0.00021

Measured 2mo ago against content hash 817c0a52d399, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 2mo 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.

.agents/skills/skills-development/SKILL.md · 21 lines

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.
Changes

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.

  1. 2mo ago First seen · 21 lines · 34 tokens per session scan A 817c0a52d399

Subscribe to this mod's changes

skills-development is a skill published in the GitHub repository miroapp/miro-ai (166 stars, last pushed 1mo ago), licensed MIT. It adds 34 tokens to every session and 209 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 2026-08-30.

Building agentsWriting and docs
Related

skills-development compared with skills from other repositories

skills-development next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
skills-developmentmiroapp/miro-aiSkill1661mo agoMITA34Claude Code, Codex
imagegenopenai/codexSkill133kyesterdayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill99kyesterdayApache-2.0A19Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k4d agoMITA200Claude Code, Codex
systematic-debuggingobra/superpowersSkill313k3d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143kyesterdayMITA95Claude Code
next-partial-prefetching-adoptionvercel/next.jsSkill143kyesterdayMITA103Claude Code