Sixth Edition · September 2026
Consensus Change Standards
A legal and technical framework for Bitcoin protocol governance.
The problem
Bitcoin has no minimum standard a consensus change must meet.
The BIP system provides a way to propose changes to Bitcoin's consensus rules, but sets no bar a proposal must clear before the community considers activation. There are no required review periods, no mandatory code-audit standards, no agreed activation thresholds, and no framework for weighing the legal and economic fallout of a failed activation.
This paper proposes one — a comprehensive framework, including a 20-point Consensus Change Readiness Checklist — drawn from the record of Bitcoin's prior consensus changes, established software-governance practice, and a legal analysis of the liabilities created by reckless activation.
What's inside
Seven sections and two appendices.
From the problem statement through historical precedent, the framework itself, the legal analysis, and a ready-to-apply adoption kit.
The Problem
BIP-110 as a case study for every failure mode a governance framework should prevent.
Historical Precedent
P2SH, SegWit, SegWit2x, and Taproot — activation parameters and outcomes, analyzed.
The Framework
Submission requirements, tiered review periods, audit standards, activation-threshold minimums, sunset clauses.
Legal Analysis
Negligence, tortious interference, fiduciary duties, pool-operator liability, and chain-split regulation.
Proposed Standards
The 20-criterion readiness checklist with a scoring system — the core of the framework.
Objections & Responses
The strongest counter-arguments to the framework, answered on their merits.
Documentary Record
The archived evidentiary record for the BIP-110 case study.
Adoption Kit
Model policy language for exchanges, mining pools, and node-software platforms.
Interactive tool · in your browser
Score any proposal against the §5.1 standard.
Run a proposed Bitcoin consensus change through the 20-criterion readiness checklist and get a live Green / Yellow / Orange / Red classification. Taproot and BIP-110 come preloaded. Nothing leaves your browser. The standard behind this checklist was submitted to the bips repository in July 2026 as a draft Informational BIP (PR #2226).
The case study, resolved
BIP-110's mandatory window closed at zero.
The framework's Section 1 case study was never hypothetical. BIP-110's activation was keyed to specific block heights, and in August and September 2026 that schedule ran its course.
Cite this work
Every edition is archived and citable.
Asaf Fulks, Consensus Change Standards: A Legal and Technical Framework for Bitcoin Protocol Governance (6th ed. 2026), consensuschange.org.
Prior editions stay live for pinned citations: Fourth Edition · Third Edition. Machine-readable metadata lives in CITATION.cff.