October 2025 performance summary for zama-ai/fhevm. This month emphasized stabilization, performance, and correctness across host-contracts and library-solidity, delivering feature-focused maintenance, naming consistency, storage optimization, and critical bug fixes to reduce risk and improve reliability. Notable work includes comprehensive dependency updates and CI workflow reliability, ERC7995 naming alignment, storage optimization for HCU, robust handling of uninitialized inputs, scalar boolean validation, and safety checks for FHE bounds. These changes enhance developer productivity, reduce runtime risk, and strengthen security posture while maintaining component compatibility.

September 2025 monthly summary focusing on delivering core features, stabilizing CI, and extending contract capabilities for zama-ai/fhevm. Highlights include centralized owner management for host contract ACLs, CI stability improvements, token-enabled protocol contracts, a gateway contracts migration to PauserSet, and enhanced pausing capabilities for host contracts.

Concise monthly summary for 2025-08 focusing on high-value feature delivery, test determinism, and development workflow improvements for zama-ai/fhevm.

July 2025 focused on security and maintainability improvements in fhevm verification paths. Reverted the extraData parameter/field from decryption and input verification to simplify function signatures, reduce risk, and improve compatibility with EIP-712 typed data. This work is tracked by two commits reverting extraData in host-contracts: 163275f75fc7bab8ac6659098131a5b17586e903 (decrypt) and 012bc13d8bc8ed53a592b68a11df263fa21f2510 (inputs). The outcome reduces complexity, enhances maintainability, and strengthens signature computation correctness.

In March 2025, the relayer-sdk project delivered critical reliability improvements for InputProof handling and established clearer release versioning, strengthening data integrity and deployment predictability for downstream users.

February 2025 monthly summary for zama-ai/fhevm: Delivered cross-chain EIP712 support for KMSVerifier, enabling cross-chain signature verification and interoperability for KMS-based verification flows. Introduced EIP712UpgradeableCrossChain contract and updated KMSVerifier to inherit from it; updated InputVerifier to remove a commented-out verification call, enabling cross-chain handling. This work positions the project for multi-chain deployments, improving security, interoperability, and developer productivity.

January 2025 monthly summary for zama-ai/fhevm: Delivered core deployment modernization, expanded decryption/ACL capabilities, and maintained versioning/maintenance hygiene. The work enhanced deployment reliability and release velocity, strengthened security with ACL/events, and improved observability and maintainability across the codebase. Business value was realized through deployment decoupling from deployer nonce, safer prerelease deployments, clearer error handling, and streamlined release processes.

December 2024 performance snapshot: Stabilized deployments and accelerated iteration for core contracts and decryption features. Implemented CI-driven workflows for core contracts, migrated to Sepolia addresses, removed deprecated GatewayCaller and Gateway library, and built Gateway integration scaffolding with mocked tests. Refactored FHEVM configuration and codegen, updated to the latest prerelease core contracts, and completed release housekeeping and versioning to enable predictable shipping (0.6.x → 0.7.0). These changes improved CI reliability, test coverage, and maintainability, while reducing risk in production deployments and accelerating access to DecryptionOracle capabilities.

November 2024 — z ama-ai/fhevm: Strengthened deployment reliability, expanded signer management tooling, and improved end-user packaging and verification. Key outcomes include cross-OS Fedora deployment support, Hardhat KMS signer management and mnemonic address retrieval, inclusion of gateway assets in npm packages, updates to deployment addresses/imports with local network configurations, and a fix enabling Etherscan verification via viaIR. These changes reduce environment-specific failures, accelerate secure signer workflows, and improve developer and end-user efficiency.