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 mr-kelly/skills --skill kelly-app-skill-creatorgit clone --depth 1 https://github.com/mr-kelly/skillsWrote 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/mr-kelly/skills/kelly-app-skill-creator)<a href="https://agentmods.dev/skills/mr-kelly/skills/kelly-app-skill-creator"><img src="https://agentmods.dev/badge/skills/mr-kelly/skills/kelly-app-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/mr-kelly/skills/kelly-app-skill-creator"><img src="https://agentmods.dev/badge/skills/mr-kelly/skills/kelly-app-skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
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 →
- high Privilege Escalation · line 279 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- medium Excessive Agency · line 375 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00173 | $0.06611 |
| Opus 5 | $0.00086 | $0.03306 |
| Sonnet 5 | $0.00035 | $0.01322 |
| Haiku 4.5 | $0.00017 | $0.00661 |
Grade A, and why
kelly-app-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 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.
How it starts
The opening of the file, as written. The whole thing — 556 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kelly App Skill Creator
Turn a recurring human-and-Agent operation into a Busabase-backed skill with a canonical Hono project whose normal delivery target is Busabase AirApp. Own the product workflow and the App-in-Skill artifact contract; delegate Busabase resource implementation and AirApp deployment mechanics.
Ownership Boundary
This skill is a taste layer over a format layer, and the split is what keeps both honest:
$busabase-app-creator(also published asbusabase-skill-creatorandbusabase-template-creator— one skill, three names) owns everything that makes the artifact valid: the skill/template/package format, AirApp runtime language, framework, server shape, dependency and SDK constraints, security boundaries, validation, sync, and deployment mechanics. Its own contract says it is "format and correctness, not taste" — it deliberately carries no visual opinions, so this layer can.- This skill owns everything that makes the artifact Kelly's: product behavior, information architecture, visible UI, layout, interaction patterns, responsive behavior, accessibility, Help & Settings, hash routing, and visual acceptance for every generated app. Creating the underlying artifact is that skill's package-first route (§ "Two Ways In" there) with this skill's UI contract applied on top.
$kelly-app-skill-creator-testsowns repository-level conformance, process, responsive browser, OSS Busabase, Cloud OAuth, persistence, and AirApp parity tests for the generated app.- Do not delegate Kelly UI decisions to
$busabase-app-creator, and do not let a runtime scaffold replace or weaken this skill's desktop or phone shell. - Do not restate AirApp runtime limits here. When a runtime rule affects UI implementation, satisfy it inside the UI contract rather than creating a competing runtime contract.
Mandatory Dependencies
Before creating or changing an app:
- Read and follow
$busabasefor connection, target Space, node discovery, ChangeRequests, review, merge, and trusted mutations. - Read and follow
$busabase-app-creatorfor resource modeling, native Views, Vault boundaries, AirApp constraints, scaffolding, validation, sync, and deployment. Creating an app-skill takes its package-first route — that skill's own guidance already routes a skill there, because a skill carrying an app is a template. The artifact is authored as a template package and verified by installing it; this skill's UI contract governs what the app inside it looks like.
What ships with it
16 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.
- agents/openai.yaml 439 B
- assets/runtime-detection/check-rules.mjs 1.4 KB runs code
- assets/runtime-detection/runtime.js 3.3 KB runs code
- assets/runtime-detection/server-route.js 1.2 KB runs code
- README_CN.md 2.3 KB
- README.md 2.6 KB
- references/app-types.md 2.9 KB
- references/busabase-data-contract.md 21 KB
- references/css-modules.md 8.4 KB
- references/demo-recording.md 8.4 KB
- references/frontend-modules.md 13 KB
- references/mobile-shell-layout.md 19 KB
- references/review-and-execution-contract.md 7.5 KB
- references/setup-onboarding.md 6.5 KB
- references/ui-workflow-patterns.md 7.7 KB
- references/workflow-patterns.md 3.2 KB
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 Changed · +1 lines a0f750bcae35
- 12d ago First seen · 555 lines · 173 tokens per session scan A 9136e5fc8a58
kelly-app-skill-creator is a skill published in the GitHub repository mr-kelly/skills (5 stars, last pushed today), licensed MIT. It adds 173 tokens to every session and 6,611 once invoked, about $0.0009 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 2026-08-31.
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