build-validate

build-validate is a skill for Claude Code from shawnclybor/clybor-claude-tooling. It costs 175 tokens per session (2,383 once invoked), scanned A, original, no licence file.

A review step for a build's premises: the three to five assumptions that must be true for its design to work. It compares those assumptions with findings from an earlier build probe, including items that could not be proven.

In plain words
What is it for?
Use it once after build-probe and before build-plan to have two or three reviewers assess the premises and unproven items.
Why use it?
It checks whether the design rests on sound assumptions before detailed planning begins, rather than reviewing the plan or repeating the check each round.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it once after build-probe and before build-plan to have two or three reviewers assess the premises and unproven items.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/shawnclybor/clybor-claude-tooling/build-validate
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 shawnclybor/clybor-claude-tooling --skill build-validate
Clone the repo
git clone --depth 1 https://github.com/shawnclybor/clybor-claude-tooling

Made for: Claude Code.

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 build-validate

README.md
[![agentmods](https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/build-validate/github.svg)](https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/build-validate)
Your own site
<a href="https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/build-validate"><img src="https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/build-validate/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 build-validate

Your own site · 80×15
<a href="https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/build-validate"><img src="https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/build-validate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 175 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,383 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 unknown 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 $0.00175 $0.02383
Opus 5 $0.00088 $0.01192
Sonnet 5 $0.00035 $0.00477
Haiku 4.5 $0.00017 $0.00238

Measured 7d ago against content hash 14b497e167d6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

build-validate 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 7d 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.

.claude/skills/build-validate/SKILL.md · 198 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 7d ago First seen · 198 lines · 175 tokens per session scan A 14b497e167d6

Subscribe to this mod's changes

build-validate is a skill published in the GitHub repository shawnclybor/clybor-claude-tooling (5 stars, last pushed 7d ago), with no licence file. It adds 175 tokens to every session and 2,383 once invoked, about $0.0009 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 2026-09-05.