vibe-requirements-validator

vibe-requirements-validator is a skill for Claude Code, Codex from ash1794/vibe-engineering. It costs 38 tokens per session (589 once invoked), scanned A, original, MIT.

A requirements review that scores product requirements against SMART criteria: specific, measurable, achievable, relevant, and time-bound.

In plain words
What is it for?
Use it when reviewing a product requirements document, user stories, feature specifications, or acceptance criteria before implementation.
Why use it?
Vague requirements such as “make it fast” are difficult to build and verify, causing rework. The review highlights which parts need clearer wording or acceptance criteria.

Skill for Claude CodeCodex

Part of the vibe-engineering plugin — 38 skills shipped together

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.

agentmods
npx agentmods add skills/ash1794/vibe-engineering/requirements-validator
Any agent
npx skills add ash1794/vibe-engineering --skill requirements-validator
Clone the repo
git clone --depth 1 https://github.com/ash1794/vibe-engineering

Made for: Claude Code, Codex.

Or install vibe-engineering, the plugin that ships this one along with the rest of its 38 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 vibe-requirements-validator

README.md
[![agentmods](https://agentmods.dev/badge/skills/ash1794/vibe-engineering/requirements-validator.svg)](https://agentmods.dev/skills/ash1794/vibe-engineering/requirements-validator)
Your own site
<a href="https://agentmods.dev/skills/ash1794/vibe-engineering/requirements-validator"><img src="https://agentmods.dev/badge/skills/ash1794/vibe-engineering/requirements-validator.svg" alt="Measured on agentmods" 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 589 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00589
Opus 5 $0.00019 $0.00295
Sonnet 5 $0.00008 $0.00118
Haiku 4.5 $0.00004 $0.00059

Measured 5d ago against content hash e4b0925468a2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

vibe-requirements-validator 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

plugins/vibe-engineering/skills/requirements-validator/SKILL.md · 67 lines

What it actually says

vibe-requirements-validator

Vague requirements cause expensive rework. Catch them early.

When to Use This Skill

  • Reviewing a PRD or feature spec before implementation
  • Writing acceptance criteria for user stories
  • When you notice requirements like "make it fast" or "improve UX"
  • Before estimating effort for a feature

When NOT to Use This Skill

  • Internal technical tasks with clear scope
  • Bug fixes (the bug IS the requirement)
  • When requirements are already validated and approved

SMART Criteria

Score each requirement 1-5 on:

  • Specific — Is it clear what exactly needs to be built? (Not "improve performance" but "reduce P95 latency to <200ms")
  • Measurable — Can you objectively verify it's done? (Not "users like it" but "NPS score >40")
  • Achievable — Can it be built with available resources and constraints?
  • Relevant — Does it align with project goals and user needs?
  • Time-bound — Is there a clear scope boundary? (Not "eventually" but "in v1.0")

Steps

  1. List all requirements from the document

  2. Score each on SMART (1-5 per dimension)

  3. Flag issues:

    • Score < 3 on any dimension → needs revision
    • Measurability < 3 → most common failure, flag prominently
    • Near-duplicates → consolidate
    • Positioning statements masquerading as requirements → remove
  4. Report:

Output Format

Requirements Validation: [Document Name]

Total Requirements: X Passing (avg >= 3.5): Y (Z%) Flagged: W

ID Requirement S M A R T Avg Issue
FR-1 "..." 4 2 5 4 3 3.6 Low measurability

Top Issues

  1. Measurability crisis — X requirements have M < 3
  2. Near-duplicates — [list pairs]
  3. Not requirements — [positioning statements]

Recommended Revisions

ID Current Suggested
FR-3 "Improve load time" "Reduce initial page load to <2s on 3G"
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. 5d ago First seen · 67 lines · 38 tokens per session scan A e4b0925468a2

Subscribe to this mod's changes

vibe-requirements-validator is a skill published in the GitHub repository ash1794/vibe-engineering (10 stars, last pushed 3mo ago), licensed MIT. It adds 38 tokens to every session and 589 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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