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 OpenCoven/coven --skill opencoven-designgit clone --depth 1 https://github.com/OpenCoven/covenWrote 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/opencoven/coven/opencoven-design)<a href="https://agentmods.dev/skills/opencoven/coven/opencoven-design"><img src="https://agentmods.dev/badge/skills/opencoven/coven/opencoven-design/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/opencoven/coven/opencoven-design"><img src="https://agentmods.dev/badge/skills/opencoven/coven/opencoven-design.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 Rogue Agent · line 28 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- medium Agent Snooping · line 359 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00027 | $0.03920 |
| Opus 5 | $0.00014 | $0.01960 |
| Sonnet 5 | $0.00005 | $0.00784 |
| Haiku 4.5 | $0.00003 | $0.00392 |
Grade A, and why
opencoven-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 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 — 390 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OpenCoven Design Skill
Use this skill when designing or implementing OpenCoven/Coven interfaces, docs pages, diagrams, package README visuals, native companion surfaces, or agent-built UI components.
OpenCoven should feel like collective intelligence plus controlled power: arcane but precise, technical not gimmicky, powerful not loud, minimal but symbolic.
Core positioning: OpenCoven is an open ecosystem for persistent AI familiars: named agents with memory, tools, identity, roles, and continuity. It turns AI from a blank chatbox into a living workspace of agents that remember, coordinate, and belong to the user.
Source Of Truth
Read these local files before changing brand or UI behavior:
DESIGN.md- canonical brand and design systemdocs/BRAND.md- brand asset index and usage summarydocs/BRANDING-ADHERENCE.md- current exceptions, risks, and hardening checklistbrand/docs/BRAND-USAGE.md- contributor PR checklistbrand/ui/color-tokens.css- canonical CSS color tokensbrand/ui/typography.css- canonical typography tokens
Do not invent a separate design system. If this skill conflicts with DESIGN.md, follow DESIGN.md and update this skill.
Brand Position
Build for harness operators and developers, not a marketing toy.
- The default feeling is a quiet command cockpit.
- The product promise is durable AI systems that can stay: remember what matters, understand their purpose, use tools, coordinate with other agents, and remain understandable over time.
- A familiar is not a faceless bot. It has a name, purpose, memory, toolset, voice, role, and place in a larger workflow.
- Keep the philosophy clear: powerful without becoming opaque, personal without pretending to be human, extensible without collapsing into chaos.
- Mystical symbolism is allowed only when it supports identity: crown silhouette, mirrored wings, rising center, nodes, execution paths.
- Interfaces should be dense, legible, and repeatable under daily use.
- Copy should be direct and capable. Avoid hype, jokes, and vague AI language.
- Use
OpenCovenfor the ecosystem/org andCovenfor the CLI/daemon/product. - The command is always
coven, neveropencoven.
What ships with it
1 file 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.
- 9d ago First seen · 390 lines · 27 tokens per session scan A 116a308b867d
opencoven-design is a skill published in the GitHub repository OpenCoven/coven (47 stars, last pushed yesterday), licensed MIT. It adds 27 tokens to every session and 3,920 once invoked, about $0.0001 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 2026-08-30.
Other skills, from other repositories
frontend-design
Produce intentional, responsive, accessible UI work and perform visual QA instead of generic component assembly.
frontend-design
Use this as the design-lead layer for VideoStudio COMPOSE work. It shapes project/composition/composition-manifest.json::artdirection and the model-authored HTML/SVG motion graphics in index.html.
ui-design-executor
Use this as UIDesigner's default execution skill. It contains the baseline design, accessibility, HTML, runtime-safety, responsive, taste, and verification rules needed by ordinary UI work. Do not load the separate system, control, taste, color, renderer, or craft skills merely to repeat these baseline rules.
ui-craft-checks
Use this comprehensive gate for formal review, QA, launch handoff, exact-fidelity inspection, high-risk complex UI, or when the fast gate exposes a deeper craft problem. Ordinary single-screen work uses ui-design-executor and its bundled validator without loading this full matrix. Pair standalone artifacts with…
ui-design-source
Use this skill when the user provides Figma material, design-export files, screenshots of design tools, PDFs, JSON, existing HTML, or asks for design-to-HTML/code fidelity. It adapts OpenDesign/Figma handoff discipline for UIDesigner without requiring a live Figma runtime.
design-system-importer
Use this when COMPOSE or an AUTO compose segment has any external reference media or style source: a reference image, reference video, DESIGN.md, brand guide, screenshot, existing website, design notes, or an explicit named visual direction.