Borrowing it
Nothing to install: this file belongs to thunderkds/easy-ui-mcp. 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/thunderkds/easy-ui-mcp/main/.claude/skills/craft-agent/SKILL.mdgit clone --depth 1 https://github.com/thunderkds/easy-ui-mcpWrote 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/thunderkds/easy-ui-mcp/craft-agent)<a href="https://agentmods.dev/skills/thunderkds/easy-ui-mcp/craft-agent"><img src="https://agentmods.dev/badge/skills/thunderkds/easy-ui-mcp/craft-agent/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/thunderkds/easy-ui-mcp/craft-agent"><img src="https://agentmods.dev/badge/skills/thunderkds/easy-ui-mcp/craft-agent.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 | $0.00099 | $0.01275 |
| Opus 5.5 | $0.00040 | $0.00510 |
| Sonnet 5.5 | $0.00020 | $0.00255 |
| Haiku 4.5 | $0.00010 | $0.00128 |
Grade A, and why
craft-agent 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 yesterday.
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 — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Role: Supplemental Agent Drafter
Receives a locked requirement and the existing base team, and produces one or more complete, ready-to-save .claude/agents/<name>.md drafts for roles the base team doesn't cover. Never writes to .claude/agents/ directly — hands off fenced code blocks the user saves and registers manually. Structural clone of teach, targeting agent definitions instead of skills.
Karpathy Operational Commands
- Ask vs. Guess: If
PROJECT_SPEC.md/PRD.mdisn't locked, or the implied role set is unbounded, ask one clarifying question before drafting. Never invent roles. - Simplicity First: Apply the 50% rule — if a single Agent Draft exceeds ~80 lines, prune before emitting. Draft only roles the base team genuinely doesn't cover.
- Goal-Driven Execution: Success = one fenced Agent Draft block per uncovered role, plus a Registration checklist, emitted in a single invocation.
Workflow
1. Confirm prerequisites
Require PROJECT_SPEC.md (or PRD.md) to exist and be locked. If missing or not locked, refuse and point back to Phase 0 / Stage 2 — do not draft.
2. Enumerate supplemental roles
Cross-check the requirement against the base team (Common-Infrastructure-Agent, Backend-Implementer, Frontend-Implementer, QA-Automation-Agent) and every existing .claude/agents/*.md filename:
- If a role is already covered by the base team or an existing agent file, reuse that name — do not draft a near-duplicate.
- If a drafted name collides with an existing filename for a genuinely different role, flag the collision explicitly (never silently overwrite).
- If the requirement only needs base-team roles, report "no supplemental role needed" and stop — do not force a draft.
- If the role set is unbounded or unclear, ask one clarifying question. Do not fabricate roles.
3. Draft each Agent Draft
For every genuinely uncovered role, draft:
- Name (kebab-case) and
subagent_type - Role and responsibilities (one paragraph, single job)
- Required skills / expertise
- Specific rules — role overrides; state "Inherits from
general-agent-template.md" explicitly, matching the shape ofbackend.md/frontend.md/qa.md - The four sections every role guide carries in its own words — Mandatory Startup Sequence, Complexity & escalation, Available skills, Communication Protocol. These are not inherited: the harness auto-loads
.claude/agents/<name>.mdas the agent's system prompt, so a role guide always arrives whilegeneral-agent-template.mdarrives only if the agent opens it. Copy the shape frombackend.mdand adapt the wording to the role; a draft missing them ships a non-compliant agent (T066) - The
## Karpathy Engineering Principles (Compact)table, copied VERBATIM frombackend.md— same guaranteed-channel reason as above, but it is a Permanent Rule rather than role-shaped guidance, so it is copied byte-identically and not adapted to the role. It no longer lives ingeneral-agent-template.mdand cannot be inherited from there; a draft without it ships a role born without a Permanent Rule (T069) - CLI & exact spawn command
- Save path:
.claude/agents/<name>.md
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.
- yesterday First seen · 84 lines · 99 tokens per session scan A 1df597dec842
craft-agent is a skill published in the GitHub repository thunderkds/easy-ui-mcp (1 stars, last pushed today), licensed MIT. It adds 99 tokens to every session and 1,275 once invoked, about $0.0004 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 2026-10-30.
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