experiment-preregister

Locks an experiment spec with a cryptographic hash before data collection.

Updated Apr 19, 2026

Search Tags:#experiment #hash #tamper-proof #bet #preregister #harking

Ready to run

npx skills add https://github.com/marmikcfc/pepper-skills --skill experiment-preregister

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: experiment-preregister
Source: https://github.com/marmikcfc/pepper-skills/tree/main/skills/experiment-preregister
Command: npx skills add https://github.com/marmikcfc/pepper-skills --skill experiment-preregister

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Lock an experiment spec with a cryptographic hash before data collection to prevent post-hoc rationalization and ensure the integrity of the decision process.

Core Features & Use Cases

Tamper-proof locking: generates a hash of the draft and writes a locked version before data collection.
Bet/status integration: updates bet status to reflect preregistration.
Guided workflow: load draft, validate fields, and produce a locked spec with a reference in experiments/active/exp-NNN.locked.md.

Quick Start

Lock an approved experiment's draft with a SHA-256 hash and write a locked record before data collection.

Frequently Asked Questions about experiment-preregister

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

FAQPage Schema

How do I preregister an experiment to prevent post-hoc rationalization?▼

You lock the experiment specification with a cryptographic SHA-256 hash before data collection. This generates a tamper-proof record that prevents post-hoc rationalization of your results.

What is a tamper-proof experiment lock and how does it work?▼

A tamper-proof experiment lock generates a SHA-256 hash of your draft specification and writes a locked markdown record. This secures the integrity of the decision process before data collection begins.

Do I need an API key to lock an experiment specification?▼

Yes, locking an experiment requires a PEPPER_CLOUD_URL and PEPPER_API_KEY. You must also provide an experiment ID, such as exp-007, to successfully write the locked specification.

Where is the locked experiment specification file stored?▼

The locked experiment specification is written to the file path experiments/active/exp-NNN.locked.md. This saves the tamper-proof hashed record in your active experiments directory.

When should I lock an experiment draft with a cryptographic hash?▼

You should lock an experiment draft when a bet is approved and before any traffic or spend is committed. This guarantees a tamper-proof record exists prior to data collection.

Does preregistering an experiment update the bet status?▼

Yes, preregistering an experiment updates the bet status to reflect the completed preregistration. This integrates the hash locking process directly with your bet tracking workflow.