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ai-agents-empirical-probe-toolkit SKILL.md skillA

ai-agents-empirical-probe-toolkit from rjmurillo/ai-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add rjmurillo/ai-agents/ai-agents-empirical-probe-toolkit@v1.0.0

Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: rjmurillo/ai-agents
Path: .claude/skills/ai-agents-empirical-probe-toolkit/SKILL.md
Versions recorded: 5
Latest version: v1.0.0, committed Sep 30, 2026
First version recorded: Aug 19, 2026
Size: 15,072 bytes
Repository stars: 48
License: MIT

Prove-it methods for this repo. Six recipes for runtime-contract probes, guard and threshold calibration, eval A/B, docs-vs-reality audits, reproduce-on-main CI triage, and negative-control test design, each with a worked example from repo history. Use when you say `probe the runtime contract`, `calibrate this guard`, `prove it empirically`. Do NOT use for the portability battle plan (use `ai-agents-portability-campaign`) or evidence standards (use `ai-agents-validation-and-qa`).

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

# AI Agents Empirical Probe Toolkit

<!-- vendor-portability: contributor-facing knowledge pack for the rjmurillo/ai-agents repo itself; intentionally references upstream paths (.agents/, .claude/, scripts/, build/) because its audience is repo contributors, not plugin consumers (issue #2050) -->
This skill is the method library for replacing assumption with measurement. Every recipe exists because an assumption shipped here and became an incident. The house rule, from the #2290 payload-format incident: the cost of a probe is 15 minutes; the cost of assumption is a P0 (`.serena/memories/copilot-hooks-observations.md`).

Two terms used throughout:

- **Probe**: a minimal disposable artifact (a hook that dumps its environment, a script that captures stdin) run against the real pinned tool to observe what the tool actually does, instead of what its docs say.
- **Negative control**: a deliberately broken input run through the same harness as the passing case, proving the test or probe CAN fail. A check that cannot fail proves nothing.

## Triggers

- `probe the runtime contract`
- `calibrate this guard`
- `prove it empirically`
- `add a negative control`
- `docs versus reality audit`
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add rjmurillo/ai-agents/ai-agents-empirical-probe-toolkit@sha256:a10fc6c80495620d

The line at the top of this page pins the label v1.0.0, 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_vvjvowaihk4cj63g.svg)](https://markdownregistry.com/a/art_vvjvowaihk4cj63g)

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

Versions

The registry has recorded 5 versions of this file, between Aug 19, 2026 and Sep 30, 2026, about one every 11 days.

version	committed	commit	size	audit
v1.0.0 latest	2026-09-30	6959c3c	15,072 B	A	view · diff
v1.0.0	2026-09-25	3fda96c	15,058 B	A	view · diff
v1.0.0	2026-09-23	efd148e	14,833 B	A	view · diff
v1.0.0	2026-09-12	fcc5ea0	14,806 B	A	view · diff
v1.0.0	2026-08-19	2c85d25	14,766 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 (15072 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

rjmurillo/ai-agents · 48 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_vvjvowaihk4cj63g
GET https://markdownregistry.com/api/v1/resolve?ref=rjmurillo/ai-agents/ai-agents-empirical-probe-toolkit
GET https://markdownregistry.com/api/v1/blob/a10fc6c80495620dcd4ff9571dddedee89db2382bf75180f38f5836d782a25fd

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.