verify

verify is a skill for Claude Code from NVZver/claude-marketplace. It costs 28 tokens per session (683 once invoked), scanned A, original, MIT.

A codebase check that tests whether a written software specification matches the existing code and can be built.

In plain words
What is it for?
Use it before implementing a feature to trace named modules, functions, or types, check each user flow, and produce a grounding report.
Why use it?
It catches references to missing code and infeasible user flows before development work is handed off.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the lsa plugin — 7 skills, 1 agent, 1 hook shipped together

Good fit Use it before implementing a feature to trace named modules, functions, or types, check each user flow, and produce a grounding report.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nvzver/claude-marketplace/verify
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 NVZver/claude-marketplace --skill verify
Clone the repo
git clone --depth 1 https://github.com/NVZver/claude-marketplace

Made for: Claude Code.

Or install lsa, the plugin that ships this one along with the rest of its 7 skills, 1 agent, 1 hook.

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 verify

README.md
[![agentmods](https://agentmods.dev/badge/skills/nvzver/claude-marketplace/verify/github.svg)](https://agentmods.dev/skills/nvzver/claude-marketplace/verify)
Your own site
<a href="https://agentmods.dev/skills/nvzver/claude-marketplace/verify"><img src="https://agentmods.dev/badge/skills/nvzver/claude-marketplace/verify/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 verify

Your own site · 80×15
<a href="https://agentmods.dev/skills/nvzver/claude-marketplace/verify"><img src="https://agentmods.dev/badge/skills/nvzver/claude-marketplace/verify.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 683 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 $0.00028 $0.00683
Opus 5 $0.00014 $0.00342
Sonnet 5 $0.00006 $0.00137
Haiku 4.5 $0.00003 $0.00068

Measured 9d ago against content hash bcb6da1f0aeb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

verify 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 9d 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.

lsa/skills/verify/SKILL.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Trace. On load, print first: =============== [lsa/skills/verify/SKILL.md] [lsa] ===============

LSA Verify (before — grounding)

See CORE.md §6 (the two checks). This is the before check; reconcile is the after check.

Role

Grounding checker.

Goal

Confirm the spec is grounded in real code and buildable, before any handoff.

Inputs

Input Source
The spec (requirements.md, <flow>.feature) specify
The codebase self
Quality-gate checks (optional) .lsa.yaml gate: — see knowledge/quality-gate-contract.md

Steps

  1. Identify the modules / functions / types the spec names (your judgment — never scripted), then pass them as arguments to bash scripts/resolve-refs.sh <symbol>… and cite its per-symbol resolution (exists @ file:line | new | MISSING | OUT-OF-RANGE) as the reference map — instead of multiple manual searches. Resolving each symbol is deterministic lookup (.lsa/VISION.md §2 principle 10); the GROUNDED / NOT-GROUNDED judgment stays yours. (→ reference map)
  2. For each user flow: confirm it is buildable on what exists; infeasible → flag. (→ feasibility)
  3. Confirm every claim is cited and every [ASSUMPTION] is visible. (→ grounding verdict)
  4. Where .lsa.yaml defines a gate: block, run each configured check and cite its command + exit code as the grounding evidence — do not re-derive the checks by hand. Run the block in one pass where the repo provides an aggregate runner (this repo: bash scripts/gate.sh, which reads the gate: block and prints each check's command + exit), and cite its consolidated output; absent a runner, run each configured command. A non-zero exit is a real defect (a broken citation, dangling link, or violated invariant) and yields NOT-GROUNDED. (→ gate results)

Output

GROUNDED or NOT-GROUNDED with grounding.md (per reference: exists @ file:line | new | [ASSUMPTION]), the cited gate: command + exit for each configured check, and any blockers.

Read the full file on GitHub · 47 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. 9d ago First seen · 47 lines · 28 tokens per session scan A bcb6da1f0aeb

Subscribe to this mod's changes

verify is a skill published in the GitHub repository NVZver/claude-marketplace (1 stars, last pushed 15d ago), licensed MIT. It adds 28 tokens to every session and 683 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 2026-08-31.

Related

Other skills, from other repositories

improve-code-quality

Guided journey from a working-but-untested vibe-coded prototype to a production-ready product with tests, clean structure, a business-rules boundary, and resilience at scale. Orchestrates nine skills phase by phase - working-with-legacy-code, clean-code, refactoring-patterns, software-design-philosophy…

wondelai/skills · 227 tokens

refactoring-patterns

Apply named refactoring transformations to improve code structure without changing behavior. Use when the user mentions "refactor this", "code smells", "extract method", "replace conditional", "technical debt", "move method", "inline variable", "decompose conditional", or "clean up this messy code". Also trigger when…

wondelai/skills · 125 tokens

team-review

Review changed code for reuse, quality, and efficiency using a team of persistent named reviewers. This skill should be used when the user says "team review", "review with team", or wants parallel code review with persistent team members for follow-up questions. Similar to /subagent-review but reviewers persist after…

NikiforovAll/claude-code-rules · 65 tokens

roslyn-query

Query .NET/C# codebases using Roslyn AST analysis via dotnet run file. Use for tracing data flow, auditing API usage, finding pattern violations, or ad-hoc codebase queries.

NikiforovAll/claude-code-rules · 44 tokens

review-responder

Use when receiving feedback on code you implemented, responding to reviewer comments, deciding which review suggestions to implement, or pushing back on incorrect review feedback.

Joncik91/ucai · 33 tokens

codex

Route a task to OpenAI's Codex CLI (codex exec) instead of doing it yourself. Use this skill ANY time the user names codex or types /codex — even for routine work Claude could handle, because the user is choosing to delegate. The intent: 'ask codex', 'have codex review/refactor this', 'check/validate with codex', 'see…

sparklingneuronics/sparkling-skills · 249 tokens