Bitcoin Core Maintainer Gloria Zhao Steps Down Amidst Protocol Debates

Gloria Zhao, a prominent Bitcoin Core maintainer and fellow at Brink, has resigned from her position and revoked her PGP signing key, marking a significant shift within the core development team. Her departure, announced on February 6, 2026, comes amidst ongoing debates surrounding Bitcoin’s protocol, particularly concerning the use of the OP_RETURN opcode and transaction relay policies.

Zhao’s Contributions to Bitcoin Core

Zhao joined the Bitcoin Core maintainers in 2022, becoming the first known female maintainer. Her work focused on critical aspects of the network, including mempool policy and transaction relay – the rules governing how transactions are validated and propagated across the Bitcoin network. She played a key role in designing and implementing several critical upgrades, including package relay (BIP 331) and Topologically Restricted Until Confirmation (TRUC, BIP 431). Her contributions also included improvements to replace-by-fee (RBF), enhancing fee bumping reliability and reducing transaction censorship.

Zhao’s work was financially supported by Brink, with funding from the Human Rights Foundation’s Bitcoin Development Fund and Jack Dorsey’s Spiral (formerly Square Crypto), allowing her to work full-time on open-source Bitcoin protocol engineering.

The OP_RETURN Controversy and Zhao’s Departure

Zhao’s resignation coincides with a contentious debate within the Bitcoin community regarding OP_RETURN, a script opcode that allows users to embed non-monetary data into transactions. Whereas proponents argue that limiting OP_RETURN restricts innovation and emerging use cases like layer-2 proofs and sidechains, critics contend that it could transform Bitcoin from a purely financial technology into a general-purpose data blockchain, fundamentally altering its core purpose. Zhao faced criticism in June 2025 for finalizing a change to Bitcoin Core that relaxed filters on non-financial transactions.

Some supporters of Zhao suggest that alleged harassment contributed to her decision to step down, though the specific motivations remain unclear. Yahoo Finance reported on this aspect of the situation.

Broader Blockchain Developments: Ethereum and Solana

Beyond the developments within Bitcoin Core, the broader blockchain landscape is also experiencing significant changes. Ethereum is preparing for the Glamsterdam upgrade, expected between June and August 2026, maintaining a cadence of two upgrades per year. The Ethereum Foundation has outlined a roadmap prioritizing scaling, user experience improvements and enhanced security. Key initiatives include advancements in L1 execution, blob scaling, and the adoption of ZK-EVM technology. BingX provides a summary of these updates.

Solana is also undergoing a transformation, shifting its focus from high throughput to “extreme low latency” and “full-stack composability.” The Solana Foundation has released an updated technical roadmap outlining features like Vote Account V4, Rent Reduction, and Alpenglow, aimed at optimizing validator participation and reducing network costs.

Security Concerns and Ongoing Vigilance

Recent security incidents highlight the importance of vigilance within the blockchain ecosystem. SlowMist disclosed a supply-chain poisoning incident involving the OpenClaw plugin hub, ClawHub, where malicious skills were used to spread harmful code. Security Alliance reported that North Korean IT workers are impersonating individuals on LinkedIn to secure remote positions. These incidents underscore the need for robust security practices and careful vetting of personnel.

Key Takeaways

• Gloria Zhao has stepped down as a Bitcoin Core maintainer after six years of service.
• Her departure is linked to ongoing debates surrounding Bitcoin’s protocol, particularly the OP_RETURN opcode.
• Ethereum is preparing for the Glamsterdam upgrade, focusing on scaling and security.
• Solana is shifting its focus to low latency and full-stack composability.
• Security threats remain a significant concern within the blockchain space.