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behavior-validator SKILL.md skillA

behavior-validator from outlinedriven/outline-driven-development is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add outlinedriven/outline-driven-development/behavior-validator@git:20260912.5c5b759

Pins git:20260912.5c5b759 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: outlinedriven/outline-driven-development
Path: .devin/skills/behavior-validator/SKILL.md
Versions recorded: 3
Latest version: git:20260912.5c5b759, committed Sep 12, 2026
First version recorded: Sep 2, 2026
Size: 4,941 bytes
Repository stars: 53
License: Apache-2.0

Use when asked to validate a web app, CLI, API, or generated artifact against a source-blind behavior contract. Not for source or remote-system changes.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Behavior validator

## Contract

| Field | Bound contract |
|---|---|
| Trigger | User needs a code-review-agnostic skill to validate a web app, CLI, API, or generated artifact against a source-blind behavior contract, or as a black-box companion to a code-aware review |
| Authority | Read-only. No file, VCS, credential, paid, published, deployed, or remote mutation. Reads only the runtime output of the target; never reads source code, repository state, or build internals |
| Side effect | Produces a structured behavior validation report. No mutation of the target, source, or workspace beyond emitting the report |
| Done | Every contract clause has an observable result; the report correctly reflects real-time behavior and no implementation evidence contaminated the validation |

## Inputs

- A behavior contract: a list of clauses, each with an identifier, a stimulus, and an expected observable outcome. Must be supplied.
- A target descriptor: how to reach the subject, a URL, a CLI invocation, an API endpoint, or an artifact path. Must be supplied.
- Optional: authentication material (tokens, headers), environment variables, seed data, or a run budget.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add outlinedriven/outline-driven-development/behavior-validator@sha256:f71c526e2f03615c

The line at the top of this page pins the label git:20260912.5c5b759, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_aejdnqocrf536jit.svg)](https://markdownregistry.com/a/art_aejdnqocrf536jit)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Sep 2, 2026 and Sep 12, 2026, about one every 5 days.

version	committed	commit	size	audit
git:20260912.5c5b759 latest	2026-09-12	5c5b759	4,941 B	A	view · diff
git:20260905.1f63894	2026-09-05	1f63894	4,910 B	A	view · diff
git:20260902.1fe14a3	2026-09-02	1fe14a3	5,025 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (4941 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

outlinedriven/outline-driven-development · 53 stars · license Apache-2.0 · pushed 2026-09-28 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_aejdnqocrf536jit
GET https://markdownregistry.com/api/v1/resolve?ref=outlinedriven/outline-driven-development/behavior-validator
GET https://markdownregistry.com/api/v1/blob/f71c526e2f03615c97bf7d856ac2dcdb2dcf2b5a2549d61c9d523095b2d2c7cb

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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