HVE Core is a collection of agents, prompts, coding instructions, and skills for building repeatable software-development workflows with GitHub Copilot. It is intended for individuals and teams that want structured AI-assisted research, planning, implementation, and review, while the catalogue entries provide many of its reusable workflow components.
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 microsoft/hve-core --skill secure-by-designgit clone --depth 1 https://github.com/microsoft/hve-coreWrote 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/microsoft/hve-core/secure-by-design)<a href="https://agentmods.dev/skills/microsoft/hve-core/secure-by-design"><img src="https://agentmods.dev/badge/skills/microsoft/hve-core/secure-by-design.svg" alt="Measured on agentmods" 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 | $0.00025 | $0.00818 |
| Opus 5 | $0.00013 | $0.00409 |
| Sonnet 5 | $0.00005 | $0.00164 |
| Haiku 4.5 | $0.00003 | $0.00082 |
Grade A, and why
secure-by-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 3d 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 — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Secure by Design — Skill Entry
This SKILL.md is the entrypoint for the Secure by Design skill.
The skill synthesizes the UK Government Secure by Design Principles (10 principles) and the Australian ASD/ACSC Secure by Design Foundations (6 foundations) into structured, machine-readable references that an agent can query to identify, assess, and improve adherence to secure-by-design practices across the software lifecycle.
Normative references (Secure by Design)
- 00 Principle Index
- 01 Security Governance
- 02 Risk-Driven Approach
- 03 Secure Product Development
- 04 Supply Chain Security
- 05 Usable Security Controls
- 06 Detect and Respond
- 07 Flexible Architecture
- 08 Minimize Attack Surface
- 09 Defense in Depth
- 10 Continuous Assurance
- 11 Secure Deprecation
Skill layout
SKILL.md— this file (skill entrypoint).references/— the Secure by Design normative documents.00-principle-index.md— index of all principle identifiers, categories, source mappings, and cross-references.01through11— one document per synthesized principle area merging UK and AU guidance.
Third-Party Attribution
UK Government Secure by Design Principles
- Copyright: Crown Copyright, UK Government Security Group
- License: Open Government Licence v3.0 (OGL-UK-3.0)
- Source: https://www.security.gov.uk/policy-and-guidance/secure-by-design/principles/
- Modifications: Synthesized into structured principle-checklist format with cross-references; merged with Australian guidance into unified principle areas
- Trademark: Use of UK Government content does not imply endorsement
What ships with it
12 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.
- references/00-principle-index.md 5.0 KB
- references/01-security-governance.md 3.5 KB
- references/02-risk-driven-approach.md 3.4 KB
- references/03-secure-product-development.md 4.6 KB
- references/04-supply-chain-security.md 4.0 KB
- references/05-usable-security-controls.md 3.7 KB
- references/06-detect-and-respond.md 3.8 KB
- references/07-flexible-architecture.md 3.4 KB
- references/08-minimize-attack-surface.md 3.8 KB
- references/09-defense-in-depth.md 3.7 KB
- references/10-continuous-assurance.md 4.1 KB
- references/11-secure-deprecation.md 4.2 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.
- 3d ago First seen · 62 lines · 25 tokens per session scan A dbf70c6bacba
secure-by-design is a skill published in the GitHub repository microsoft/hve-core (1,436 stars, last pushed today), licensed MIT. It adds 25 tokens to every session and 818 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 2026-09-03.
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