Borrowing it
Nothing to install: this file belongs to Heiberg-Industries/designbrief. 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/Heiberg-Industries/designbrief/main/AGENTS.mdgit clone --depth 1 https://github.com/Heiberg-Industries/designbriefWrote 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/instructions/heiberg-industries/designbrief/agents-md)<a href="https://agentmods.dev/instructions/heiberg-industries/designbrief/agents-md"><img src="https://agentmods.dev/badge/instructions/heiberg-industries/designbrief/agents-md/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/instructions/heiberg-industries/designbrief/agents-md"><img src="https://agentmods.dev/badge/instructions/heiberg-industries/designbrief/agents-md.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 | $0.00227 | $0.00227 |
| Opus 5.5 | $0.00091 | $0.00091 |
| Sonnet 5.5 | $0.00045 | $0.00045 |
| Haiku 4.5 | $0.00023 | $0.00023 |
Grade A, and why
designbrief AGENTS.md 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 2mo 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
designbrief
Design direction for AI-generated UI. This project contains 20 style guardrail files in styles/.
When building UI
- If the user specifies a style, read
styles/{style-name}.mdand follow its guardrails - If no style is specified, read
styles/_index.mdto see all available styles with mood/industry tags, then help the user choose - Apply the chosen style's rules for typography, color, spacing, components, layout, and motion
- Stay consistent — don't mix styles unless asked
Available styles
See styles/_index.md for the full catalog. Style files: anti-design, art-deco, aurora, bauhaus, bento-grid, claymorphism, corporate-modern, dark-mode-premium, flat-design, glassmorphism, japandi, material-design, minimalism, neubrutalism, neumorphism, organic, retro-futurism, skeuomorphism, swiss, y2k-revival.
For the full skill definition with detailed workflow, see SKILL.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.
- 2mo ago First seen · 17 lines · 227 tokens per session scan A bd51dded19bf
designbrief AGENTS.md is an instructions file published in the GitHub repository Heiberg-Industries/designbrief (10 stars, last pushed 8mo ago), licensed MIT. It adds 227 tokens to every session, about $0.0009 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 2026-08-31.
designbrief AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| designbrief AGENTS.mdHeiberg-Industries/designbrief | Instructions file | 10 | 8mo ago | MIT | A | 227 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |