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 agentmods add skills/microsoft/hve-core/requirements-authornpx skills add microsoft/hve-core --skill requirements-authorgit 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/requirements-author)<a href="https://agentmods.dev/skills/microsoft/hve-core/requirements-author"><img src="https://agentmods.dev/badge/skills/microsoft/hve-core/requirements-author.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 | $0.00027 | $0.06084 |
| Opus 5 | $0.00014 | $0.03042 |
| Sonnet 5 | $0.00005 | $0.01217 |
| Haiku 4.5 | $0.00003 | $0.00608 |
Grade A, and why
requirements-author 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 5d 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 — 486 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Requirements Author Skill
Overview
This skill defines how to produce and evolve requirements documents across the project lifecycle for two document types: the Business Requirements Document (BRD) and the Product Requirements Document (PRD). Shared requirements-engineering knowledge lives in references/_shared/, while BRD-specific and PRD-specific knowledge live in references/brd/ and references/prd/ so each consuming agent loads only what its document needs.
The canonical BRD template is brd-full.md with its brd-frontmatter-overlay.md, and the canonical PRD template is prd-full.md. The BRD Builder dispatches into the BRD phase anchors (#discover, #define, #govern); the PRD Builder dispatches into the PRD phase anchors (#prd-assess through #prd-finalize).
Use this skill with the references for the active document scope:
Shared (references/_shared/):
BRD scope (references/brd/):
PRD scope (references/prd/):
Handoff Transport Convention
The producing workflow owns each handoff's canonical transport, and the
consumer validates the complete payload regardless of transport. An outcome
hypothesis returns OUTCOME_HYPOTHESIS_TO_BRD_HANDOFF_V1 inline by default
because it is a one-time seed derived from an already persisted source
artifact; the user may instead supply a separately persisted payload path.
BRD Govern persists BRD_TO_PRD_HANDOFF_V1 and returns its path because that
payload is a durable governance record consumed across agent sessions. This
asymmetry is intentional and does not change payload authority or validation.
What ships with it
44 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/_shared/atomicity-checklist.md 5.8 KB
- references/_shared/design-decisions.md 2.0 KB
- references/_shared/diagram-format-selector.md 5.5 KB
- references/_shared/given-when-then.md 5.5 KB
- references/_shared/id-schema.md 6.9 KB
- references/_shared/iso-29148-quality-attrs.md 4.7 KB
- references/_shared/mendelow-matrix.md 5.3 KB
- references/_shared/moscow.md 3.6 KB
- references/_shared/prioritization-schemes.md 6.8 KB
- references/_shared/process-modeling.md 6.0 KB
- references/_shared/quality-rubric.md 5.4 KB
- references/_shared/raci-patterns.md 7.7 KB
- references/_shared/requirements-definition.md 13 KB
- references/_shared/smart-rubric.md 5.6 KB
- references/_shared/stakeholder-analysis.md 7.9 KB
- references/_shared/standards-excerpts.md 12 KB
- references/_shared/traceability-matrix.md 5.2 KB
- references/_shared/traceability-naming.md 6.1 KB
- references/brd/brd-quality-formats.md 4.5 KB
- references/brd/brd-quality-report-v1.md 17 KB
- references/brd/brd-standard-findings-v1.md 13 KB
- references/brd/brd-to-prd-handoff-v1.md 13 KB
- references/brd/handoff-payload-schema.md 8.2 KB
- references/brd/iso-25010-nfr-taxonomy.md 5.5 KB
- references/brd/iso-29148-quality-gate.md 8.6 KB
- references/brd/istqb-testability.md 5.3 KB
- references/brd/outcome-hypothesis-to-brd-handoff-v1.md 12 KB
- references/brd/requirements-quality-rubric.md 14 KB
- references/prd/connextra-template.md 4.4 KB
- references/prd/ears-acceptance.md 4.9 KB
- references/prd/feasibility-to-prd-handoff.md 4.4 KB
- references/prd/invest.md 4.1 KB
- references/prd/metrics-frameworks.md 4.3 KB
- references/prd/mvp-framing.md 3.6 KB
- references/prd/nist-800-160-nfr.md 6.5 KB
- references/prd/prd-quality-formats.md 4.4 KB
- references/prd/prd-quality-report-v1.md 18 KB
- references/prd/prd-standard-findings-v1.md 15 KB
- references/prd/product-discovery.md 7.1 KB
- templates/brd/brd-frontmatter-overlay.md 7.5 KB
- templates/brd/brd-full.md 13 KB
- templates/brd/diagram-ascii.md 2.3 KB
- templates/brd/diagram-mermaid.md 989 B
- templates/prd/prd-full.md 12 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.
- 5d ago First seen · 486 lines · 27 tokens per session scan A 971e34e139b6
requirements-author is a skill published in the GitHub repository microsoft/hve-core (1,431 stars, last pushed today), licensed MIT. It adds 27 tokens to every session and 6,084 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.
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