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 ivegamsft/basecoat --skill agent-designgit clone --depth 1 https://github.com/ivegamsft/basecoatWrote 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/ivegamsft/basecoat/agent-design)<a href="https://agentmods.dev/skills/ivegamsft/basecoat/agent-design"><img src="https://agentmods.dev/badge/skills/ivegamsft/basecoat/agent-design.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 | $0.00071 | $0.00377 |
| Opus 5 | $0.00036 | $0.00188 |
| Sonnet 5 | $0.00014 | $0.00075 |
| Haiku 4.5 | $0.00007 | $0.00038 |
Grade A, and why
agent-design 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 3d 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
Agent Design Skill
Design, scaffold, or author Copilot agent definitions, skill folders, and instruction files for a shared customization repository.
Template Index
| Template | Purpose | Path |
|---|---|---|
| Agent definition | Scaffold a new .agent.md with frontmatter and standard sections |
agent-template.md |
| Skill folder | Scaffold a new skill with SKILL.md and supporting structure |
skill-template.md |
| Instruction file | Scaffold a reusable instruction file | instruction-template.md |
Conventions & Guardrails
- Agent filenames:
<kebab-case-name>.agent.md; skill folders:skills/<name>/SKILL.md; instruction files:instructions/<name>.instructions.md - All files use YAML frontmatter fenced by
---; descriptions include trigger phrases for discovery - Do not create an agent when a skill or instruction would suffice; check inventory for duplicates
- Keep each primitive scoped to a single responsibility; validate frontmatter with a YAML linter
Agent Pairing
Use with agent-designer agent (primary consumer). prompt-engineer agent optimizes instruction text.
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.
- 3d ago First seen · 41 lines · 71 tokens per session scan A 7736cdda80a8
agent-design is a skill published in the GitHub repository ivegamsft/basecoat (4 stars, last pushed 2d ago), licensed MIT. It adds 71 tokens to every session and 377 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 2026-09-03.
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