March 2026 quarterly/monthly summary for trezor/trezor-firmware focused on reliability, protocol robustness, CI quality, and dependency maintenance to support faster, safer releases. Delivered key fixes and improvements to BLE handling, protocol validation, CI workflow reliability, and a dependency upgrade that strengthen the codebase and developer velocity.

Month: 2026-01 — Monthly work summary for trezor-firmware focusing on security, usability, and maintainability: - Key features delivered: secure channel layer for Trezor Host Protocol, THP protocol example client, enhanced diagnostics and logging, and dependency resolution cleanup. - Major bugs fixed: None reported this month. - Overall impact and accomplishments: Strengthened security of host-device communications, improved library usability with an example client, enhanced observability for error diagnostics, and streamlined dependency management to ease future upgrades. - Technologies/skills demonstrated: Rust, secure channel design, THP protocol, enhanced logging and diagnostics, Cargo dependency management (Cargo.lock removal), and maintainability practices.

December 2025: Delivered key firmware enhancements focused on descriptor-based public key management and extended public key handling in trezor-firmware, establishing groundwork for descriptor wallets and future key formats, with no high-severity bug fixes observed this period.

November 2025 monthly summary for trezor-firmware: - Key features delivered across the firmware stack include the Trezor Client Transport and Modular Evolu Feature, the Firmware Crypto Improvements and Refactor, and Build Tooling, Dependencies, and CI Enhancements. These changes advance modularity, security, and release quality while strengthening cross-component integration. - Major bugs fixed during the month include the Emulator macOS non-blocking socket fix, the Elligator2 boolean header inclusion bug fix, and the T3W1 build issue under DISABLE_OPTIGA, improving build reliability and runtime stability. - Overall impact: enhanced security posture and cryptographic hygiene, more modular and maintainable code, robust cross-platform build and CI pipelines, and faster, more reliable releases with higher code quality. - Technologies/skills demonstrated: Rust (trezor-thp transport and client), cryptographic bindings and primitives (trezor-crypto), build tooling and CI (bindgen, zeroize, AES context alignment), cross-compiler compatibility, and macOS networking considerations.

Concise monthly summary for 2025-10 focused on delivering key BLE UX improvements, codebase maintainability enhancements, and architecture refinements. Highlights include preserving the BLE device name cache across resets to improve onboarding consistency, ensuring users return to the home screen after successful BLE pairing, centralizing BLE-related constants and clarifying storage keys to reduce duplication, refactoring the device menu for consistency, and reworking emulator socket handling for BLE/USB with a dedicated emu_sock_t and centralized lifecycle. UI translations polishing and testing scaffolding were completed to improve demonstration readiness and test coverage. Business value realized includes smoother BLE onboarding, fewer follow-up fixes, clearer storage semantics, clearer UI flows, and improved testability and maintainability across the firmware codebase.

September 2025: Delivered explicit BLE control, strengthened THP pairing identity, and boosted CI reliability and hardware coverage. These changes reduce risk of accidental BLE usage, improve secure pairing, and enhance build/test stability across models (including T3W1).

August 2025: Delivered reliability improvements for THP transport and DeviceProperties evaluation, extended THP credentials with application name for better identification of pairing requests, exposed BLE connection status flags to Python to enable checks for connectability and pairing mode, and streamlined CI workflow to reduce artifact naming and protocol-version matrices. These changes improve device compatibility, developer productivity, and release maintainability, delivering tangible business value in trusted device behavior, smoother onboarding, and faster issue resolution.

Monthly summary for 2025-07 focusing on delivering user-facing features, stabilizing the build and test ecosystem, and driving reliability across the firmware repository trezor/trezor-firmware. Highlights include a robust BLE pairing UX, THP pairing support for Caesar and Delizia, fixes to protobuf handling, and strengthened CI/testing and dependency management that reduce release risk and support modern environments.

June 2025 saw foundational THP messaging enhancements and substantial improvements to the firmware build and CI tooling, delivering measurable business value through stronger data integrity, improved user experience, and faster, more reliable releases.

May 2025 monthly summary for trezor/trezor-firmware focusing on delivering core platform reliability improvements, data-handling enhancements for large assets, and streamlined release processes. Highlights include chunked homescreen image uploads, cross-language proto renames for DataChunkRequest/DataChunkAck, a language-change refactor to simplify global UX, and CI/CD/workflow improvements. A key bug fix removed an unnecessary LD_LIBRARY_PATH workaround to stabilize make upload on CI setups. The changes improved reliability, developer velocity, and product quality across firmware updates and tooling.

April 2025 monthly summary for trezor-firmware: Delivered core BLE enablement and improved build/emulator integration, enabling secure device onboarding and modular BLE features across firmware and tooling. Focused on reliability, cross-platform support, and business value through secure pairing, exposure of BLE state to MicroPython, Rust bindings, and improved developer experience.

March 2025: Delivered key improvements to CI reliability and BLE testing capabilities in trezor-firmware. Implemented conditional Rust builds to avoid ASan-related core test failures, added timeouts to legacy CI jobs, and introduced a BLE emulation infrastructure with a BlueZ-emulator bridge, plus MicroPython BLE pairing enhancements for more secure and configurable pairing flows. These changes reduce build/test instability, accelerate development cycles, and broaden hardware-agnostic BLE development/testing.

February 2025: Maintainer hygiene and governance improvements in Saghen/nixpkgs with no functional impact. Focused on updating maintainer lists to reflect current ownership, ensuring accurate attribution and responsibility across Nix expressions. All changes were verified to be non-functional for the Sympa service. Commit-level traceability established for future audits.

January 2025 — Delivered core firmware enhancements and release-process improvements for trezor-firmware (2.8.x/0.2.x), emphasizing stability, consistency, and faster, auditable releases. Key features delivered include a bootloader upgrade and model name standardization, release notes/versioning/localization updates, and improvements to hashing safety and CI tooling. Major bug fixes addressed protobuf uint64 decoding and cross-environment hashing determinism. CI, tooling, and changelog formatting enhancements broaden non-debuglink legacy builds, language JSON updates, and stricter changelog rules. Overall impact: improved build integrity, cross-version consistency, and business value through safer releases and clearer localization.

December 2024 monthly summary for trezor-firmware focusing on delivering cross-platform dev tooling, stabilizing builds, and preparing release readiness. Key items include: Conditional kcachegrind in Nix for non-macOS dev environments; macOS High-DPI rendering fix; deterministic Git revision parsing for shallow repos; CI/CD workflow improvements with Docker image builds and release triggers; firmware release readiness for version 2.8.6 with version bump, signed translations, and changelog updates. Impact: smoother cross-platform development, more reliable and reproducible builds, and faster, safer releases. Technologies/skills demonstrated: Nix/dev tooling, SDL/macOS handling, Git revision strategies, GitHub Actions, Docker, versioning, translations signing, and changelog maintenance.

November 2024 (2024-11) — Trezor firmware development focused on reliability, security, and CI efficiency. Delivered a stabilized build system with a Docker workaround and language-version validation, improved translation integrity with hole-detection, and began hardening the supply chain with signed bootloader and translations for the 2.8.x series. Implemented CI enhancements to ensure consistent UI reports, faster feedback, and reduced noise. Addressed cross-platform toolchain readiness (GCC14) and tooling improvements, while tidying up code style and updating documentation and changelogs to reflect progress. Overall, these efforts improved build reliability across environments, strengthened security posture, and accelerated firmware delivery.

Concise monthly summary for 2024-10 focused on trezor-firmware development: key features delivered, major bugs fixed, and overall impact. Demonstrated performance, reliability, and release-readiness with secure sourcing and user-facing improvements.

December 2023: Delivered Monero Test Binaries Compatibility Update for Trezor Testing in trezor/trezor-firmware. Updated Monero test binaries to the latest version to ensure compatibility and improve testing accuracy for the Trezor hardware wallet. No major bugs fixed this month. Overall impact: strengthened QA reliability for Monero workflows, enabling earlier regression detection and more robust validation ahead of releases. Technologies/skills demonstrated: firmware testing, test binary management, and version control practices.