Specify

Specify is a skill for Claude Code from Nagiliant/Genesis-Legacy-V2. It costs 38 tokens per session (986 once invoked), scanned A, original, Apache-2.0.

A requirements-writing step that defines what a software feature must do, including user stories, requirements, checks for success, and a small work plan. It describes the result, not the implementation method.

In plain words
What is it for?
Use it to create or revise a feature specification after its design has been approved, with functional and quality requirements and testable acceptance criteria.
Why use it?
It gives developers and stakeholders a shared definition of the feature before coding begins. It also breaks a large feature into smaller units in the order they depend on one another.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the genesis-spec-kit plugin — 23 skills shipped together

Good fit Use it to create or revise a feature specification after its design has been approved, with functional and quality requirements and testable acceptance criteria.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nagiliant/genesis-legacy-v2/genesis-specify
Install

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.

Any agent
npx skills add Nagiliant/Genesis-Legacy-V2 --skill genesis-specify
Clone the repo
git clone --depth 1 https://github.com/Nagiliant/Genesis-Legacy-V2

Made for: Claude Code.

Or install genesis-spec-kit, the plugin that ships this one along with the rest of its 23 skills.

Wrote 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.

agentmods badge for Specify

README.md
[![agentmods](https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-specify/github.svg)](https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-specify)
Your own site
<a href="https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-specify"><img src="https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-specify/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.

agentmods 80×15 button for Specify

Your own site · 80×15
<a href="https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-specify"><img src="https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-specify.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 986 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.00986
Opus 5 $0.00019 $0.00493
Sonnet 5 $0.00008 $0.00197
Haiku 4.5 $0.00004 $0.00099

Measured 11d ago against content hash f9810f40a3c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

Specify 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 11d 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.

skills/genesis-specify/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Specify — The WHAT

Produce the master spec: user stories, functional requirements (FRs), non-functional requirements (NFRs), acceptance criteria (ACs), and the micro-spec plan that breaks the feature into dependency-ordered groups of small implementation units. Strictly WHAT — never HOW.

Gate: the feature's design phase must be accepted (else "Accept the design first").

Inputs

  • .genesis/project-state.md (mode)
  • The constitution
  • .genesis/features/<feature>/design.md (required)
  • .genesis/features/<feature>/brainstorm-log.md (optional)
  • .genesis/design/overview.md and other relevant design docs
  • approvals/master.json (verify design accepted)

Process

  1. Resolve the feature name; handle an existing/partial spec (revise vs continue vs fresh).
  2. Write spec.md from spec-template.md with all 14 sections:
    1. Overview · 2. Design Document References · 3. User Stories · 4. Functional Requirements (FR-001…, RFC-2119 MUST/SHOULD/MAY) · 5. Non-Functional Requirements (NFR-001…) · 6. Acceptance Criteria (AC-001…, EARS form "WHEN {trigger}, THE SYSTEM SHALL {behavior}", each linked to an FR) · 7. Agent Boundaries (Always / Ask First / Never) · 8. Changelog Preview · 9. Out of Scope · 10. Assumptions (A-001…) · 11. Open Questions · 12. Constitution Compliance Check · 13. Micro Spec Plan · 14. Changelog.
  3. Section 13 — the Micro Spec Plan: groups ordered by dependency. For each group list its micro specs (ID, title, description, dependencies, size S/M/L/XL); include totals (group count, spec count, critical path). Two safeguards:
    • Shared Infrastructure column — any file touched by 2+ specs gets exactly one owner group responsible for auditing it.
    • Cross-Cutting FRs table — FRs spanning 2+ subsystems (keywords across/between/coordination/handoff) are each assigned to one micro spec at the integration point, so they don't fall through audit cracks.
  4. Zero implementation detail — no file paths, function names, endpoints, or schemas. Deferred items go to Out of Scope with a note on which spec they belong in.
  5. If the spec depends on other features, write dependencies.json (shape below); skip the file if none.
  6. Self-validation pass (up to 3 iterations): catch implementation leaks, vague requirements, missing strength keywords, FRs without ACs, untestable ACs, incomplete user stories, mode mismatch; auto-correct and report.
  7. Constitution-compliance check; insert <!-- NEEDS_CLARIFICATION: {question} --> markers for residual ambiguity; recommend /genesis-clarify if any remain. Present; commit; update project-state.md.

Read the full file on GitHub · 67 lines

Changes

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.

  1. 11d ago First seen · 67 lines · 38 tokens per session scan A f9810f40a3c6

Subscribe to this mod's changes

Specify is a skill published in the GitHub repository Nagiliant/Genesis-Legacy-V2 (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 38 tokens to every session and 986 once invoked, about $0.0002 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 2026-08-31.

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