A2 — Spec Review

A2 — Spec Review is a skill for Claude Code from Nagiliant/Genesis-Legacy-V2. It costs 39 tokens per session (584 once invoked), scanned A, original, Apache-2.0.

A checklist-based review method that checks every functional requirement and acceptance criterion in a specification against the code.

In plain words
What is it for?
It is for producing Pass or Fail results with evidence for each requirement in a software project.
Why use it?
It helps reveal which requested behaviors are implemented and which are missing, without mixing that check with opinions about code quality or architecture.

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 It is for producing Pass or Fail results with evidence for each requirement in a software project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nagiliant/genesis-legacy-v2/genesis-a2
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-a2
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 A2 — Spec Review

README.md
[![agentmods](https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-a2/github.svg)](https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-a2)
Your own site
<a href="https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-a2"><img src="https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-a2/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 A2 — Spec Review

Your own site · 80×15
<a href="https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-a2"><img src="https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-a2.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 584 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 $0.00039 $0.00584
Opus 5 $0.00019 $0.00292
Sonnet 5 $0.00008 $0.00117
Haiku 4.5 $0.00004 $0.00058

Measured 11d ago against content hash 045cd62f5996, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

A2 — Spec Review 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-a2/SKILL.md · 39 lines

How it starts

The opening of the file, as written. The whole thing — 39 lines — stays where its author put it; the contents beside it link to each section on GitHub.

A2 — Spec Review (FR/AC Compliance)

The mechanical compliance check. A2 walks every Functional Requirement (FR) and every Acceptance Criterion (AC) in the master spec and renders a binary verdict — Pass or Fail — against the implementation, with evidence. It makes no judgment about code quality (that is A3), direction (A4), or architecture (A1). Exhaustive and non-judgmental: each requirement either is satisfied by the code or it is not.

Inputs

  • spec.md (required — the source of all FRs/ACs) · all micro specs in scope · the actual code files they reference
  • The constitution · prior audit reports for this scope (e.g. the A1 report) for cumulative context · the project mode

Process

  1. Build the requirement checklist: extract every FR and AC that applies to this scope (for a group, the FRs/ACs its micro specs cover).
  2. Scan each file against each requirement — an exhaustive file-by-file pass. Produce a per-requirement verdict (Pass/Fail) with specific evidence.
  3. Review the scan for accuracy — correct false positives and false negatives, add context. (Two stages: a fast exhaustive pass, then a careful review pass.)
  4. (Brownfield) same File-Operations-table scoping and Inherited/Introduced classification as A1.
  5. Write the report to audits/{scope}-a2.md: a coverage table listing every FR/AC with Pass/Fail and its evidence, a finding per failure with reasoning trace, and an overall verdict.

Discipline

A2 is binary and evidence-bound. A well-formed finding cites (1) the exact FR/AC ID with its wording, (2) the implementation evidence that fails it, and (3) a Pass/Fail verdict with no ambiguity. If a requirement is itself ambiguous, A2 flags the ambiguity rather than guessing intent — it never invents a passing or failing interpretation to resolve unclear spec language.

Shared machinery

Finding format, the zero-tolerance loop (loops to zero findings), and conviction scoring are shared across all lenses — see docs/the-audit-system.md. A2 may run alongside A1, but A3 still waits on A1 being clean.

Read the full file on GitHub · 39 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 · 39 lines · 39 tokens per session scan A 045cd62f5996

Subscribe to this mod's changes

A2 — Spec Review is a skill published in the GitHub repository Nagiliant/Genesis-Legacy-V2 (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 39 tokens to every session and 584 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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