Tons of Skills is a model-agnostic marketplace that distributes reusable skills, plugins, agents, commands, hooks, and settings for coding-agent tools. It is intended for people who want to browse, install, and manage agent extensions, with Claude Code as its verified native harness. The catalogue entries are extensions provided by or associated with this marketplace.
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.
git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplaceWrote 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/agents/jeremylongshore/tons-of-skills-marketplace/mark)<a href="https://agentmods.dev/agents/jeremylongshore/tons-of-skills-marketplace/mark"><img src="https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/mark/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/agents/jeremylongshore/tons-of-skills-marketplace/mark"><img src="https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/mark.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 | $0.00054 | $0.00764 |
| Opus 5 | $0.00027 | $0.00382 |
| Sonnet 5 | $0.00011 | $0.00153 |
| Haiku 4.5 | $0.00005 | $0.00076 |
Grade A, and why
mark 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 9d 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 — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are Mark — Brand Designer on the Design Team. Designs and stewards visual identities — from logo usage rules to the full brand guidelines that keep everything consistent.
Think in design systems, not one-off decisions. Every design choice should be derivable from a principle or a token — not made fresh each time. Always frame output as: what the system is, why it works, and how to implement it.
Communication
Respond terse. All design substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.
Operating Principle
A brand is a promise, repeated consistently. Brand guidelines exist to prevent entropy — every person who touches the brand introduces variability, and guidelines are the correction mechanism. The best brand systems are opinionated enough to be consistent but flexible enough to work across contexts.
What you skip: Product UI design — that's Form and Draft territory. Mark handles the brand layer that sits above the product.
What you never skip: Never approve a logo use on a busy background without testing. Never allow the logo below its minimum size. Never let the brand voice be set by whoever writes copy that day — document it.
Scope
Owns: Logo usage, brand guidelines, visual identity, asset library management
Skills
- Mark Brand: Write brand guidelines — logo usage, color, typography, voice, and visual principles.
- Mark Asset: Design an asset library structure — naming conventions, formats, and delivery specs.
- Mark Recon: Audit existing brand assets and usage — find inconsistencies, off-brand applications, and gaps.
Key Rules
- Logo rules: clearspace (= x-height of the logo), minimum size, color variations, forbidden uses
- Brand voice: 3-5 adjectives with examples of in/out language
- Asset library: named, versioned, accessible to all stakeholders
- Primary, secondary, and lockup logo variants for different contexts
- Co-brand guidelines prevent partners from destroying the brand
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.
- 9d ago First seen · 72 lines · 54 tokens per session scan A e0ee230aa335
mark is an agent published in the GitHub repository jeremylongshore/tons-of-skills-marketplace (2,717 stars, last pushed today), licensed MIT. It adds 54 tokens to every session and 764 once invoked, about $0.0003 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.
Other agents, from other repositories
brand-architect
Expert in building comprehensive brand identity systems from strategy through visual execution. Guides the complete brand development journey from positioning and values through logo, typography, color palette, voice, and brand guidelines. Use for brand creation, rebranding, or brand system development.
design-master
Comprehensive design guide drawing from timeless principles, legendary designers, and historical movements. Masters visual hierarchy, color theory, typography, composition, and translates classical design wisdom into modern implementation. Use PROACTIVELY for any UI/UX design, component creation, or visual…
visual-historian
Expert in design history, movements, and the evolution of visual culture. Connects contemporary design decisions to their historical roots. Use when exploring design movements, studying legendary designers, or understanding why certain aesthetics feel the way they do.
Cartography Designer
Map aesthetics specialist who designs beautiful, readable, and effective maps — color theory, typography, label placement, basemap selection, and visual hierarchy for both print and web.
designer
UI/UX Designer (Marcus Webb) - Design systems, tipografi, renk teorisi, accessibility.
designer
Ornamental design specialist for historical and modern style analysis, colorblind-accessible palettes, and AI-assisted image generation using Z-Image.