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verifier

Run ordered verification checks and report PASS/FAIL with evidence.

3|Updated Jan 19, 2026
Search Tags:#automation#verification#evidence#code#checks#fast-fail
One-click install
npx skills add https://github.com/harivansh-afk/claude-code-vertical --skill verifier-harivansh-afk
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: verifier
Source: https://github.com/harivansh-afk/claude-code-vertical/tree/main/skills/verifier
Command: npx skills add https://github.com/harivansh-afk/claude-code-vertical --skill verifier-harivansh-afk

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Verification of code implementations through deterministic checks without modifying source code, ensuring visibility into failures and evidence.

Core Features & Use Cases

  • Run ordered checks: type checks, existence checks, content checks, and agent-style evaluation.
  • Fast-fails on first error and reports PASS or FAIL with evidence.
  • Use Case: In CI pipelines, automatically validate a patch by executing verification_spec before merging.

Quick Start

Provide a verification_spec describing the checks to run. The skill will execute them, report PASS or FAIL with evidence, and propose a one-line fix if necessary.

Frequently Asked Questions about verifier

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automate sequential verification checks on a codebase without modifying the source?▼

Automated code verification executes ordered checks defined in a verification_spec, running type, file-exists, and file-contains validations without modifying the source, reporting PASS or FAIL with evidence.

What is deterministic code verification and how does fast-fail behavior work in CI pipelines?▼

Deterministic code verification runs ordered checks that produce consistent PASS or FAIL results with evidence. Fast-fail behavior immediately halts the verification sequence upon encountering the first error, ensuring quick feedback in CI pipelines.

How do I validate a patch automatically before merging using ordered checks?▼

You validate a patch by configuring a verification_spec to run automated ordered checks, such as file-exists and content validations, which fast-fail on errors and report PASS or FAIL with evidence before merging.

Can I run agent-style evaluation and file-contains checks during local development?▼

Yes, you can run agent-style evaluation and file-contains checks during local development by supplying a verification_spec, which executes the ordered checks and reports PASS or FAIL with evidence without modifying your code.

Does the verifier skill modify my codebase when running existence and content checks?▼

No, the verifier skill performs deterministic existence and content checks without modifying the codebase. It only reads the source to report PASS or FAIL with evidence, ensuring your code remains untouched.

What is the best way to report evidence for failed code checks in an automated pipeline?▼

The best way to report evidence for failed code checks is using a verification_spec with fast-fail behavior, which immediately stops on the first error and outputs a PASS or FAIL status with evidence and a proposed one-line fix.

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