April 2025 – Delivered key features and fixes across LedgerHQ/speculos and LedgerHQ/ledger-app-database, focusing on pipeline reliability, API capability, and library-load robustness. These changes reduce compute waste, broaden signing capabilities, and stabilize font rendering, while laying groundwork for future features in the database repo.

In March 2025, LedgerHQ/speculos delivered CI/CD workflow stabilization and release management improvements to boost deployment reliability, reproducibility, and governance. Key changes include using the virtualenv Python interpreter in CI to lock package versions, enabling deployments from CI and extending release artifacts, and enforcing release publication only on tagged commits to prevent accidental releases. These changes reduce environment drift, improve auditability, and accelerate safe release cycles.

February 2025: LedgerHQ/speculos delivered a secure CI/CD release automation and hardening for the Speculos Python package. Implemented end-to-end release steps (publish, sign, attest) and tightened CI permissions, improving security, auditability, and release reliability.

January 2025 monthly summary for LedgerHQ developer work. Focused on delivering a new Avail Recovery app integration and modernizing CI/CD for Speculos with expanded Python version support. Key outcomes include: (1) Avail Recovery app initialized and added to ledger-app-database, enabling onboarding and new recovery workflows for customers. (2) Speculos CI/build environment modernization with a Python 3.10 builder image and an expanded multi-version matrix covering Python 3.9–3.13, plus tests for 3.12/3.13, with classifiers and changelog updated. (3) CI stability improvements addressing GitHub Actions setup-python issues, including temporary dropping of matrix testing and subsequent re-enablement. (4) Re-enabled Python 3.9 support in appbuilder images to maintain compatibility. Overall, these efforts enhance release readiness, test coverage, and maintainability while reducing onboarding time for new features. Technologies/skills demonstrated include Python, Docker build images, GitHub Actions CI, multi-version testing, environment orchestration, and changelog/classifier maintenance.

December 2024 performance summary for LedgerHQ/speculos: Implemented and stabilized the Speculos-builder CI/CD pipeline. Key changes include (1) workflow enhancement: PR trigger on master and updating Docker build/push to newer versions with conditional pushes on master; refined LANG handling in Dockerfile to assign environment variables more precisely. (2) reliability fixes: added GHCR login for pushing the builder image, enforced Docker build platform to ensure correct architecture, and removed the tags parameter to enable digest-based pushes. Outcomes: smoother, faster, and more reproducible builds; safer master releases; improved multi-arch support; reduced manual intervention.

Month 2024-11 Monthly Summary for LedgerHQ/speculos: Key features delivered: - NFC support for Flex and Stax devices in the Speculos emulator, including updates to NFC handling logic and OS settings retrieval for these devices, with minor NFC data handling fixes. - Unified transport layer and configurable protocol: introduced a common transport interface, centralized transport logic, ensured a single transport instance at a time, and added a CLI option to configure HID, U2F, or NFC transport (--transport). - Release 0.12.0: updated CHANGELOG to reflect the November 25, 2024 release date and documented Python dependency updates (certifi, urllib3, werkzeug, zipp, and requests). Major bugs fixed: - Minor NFC data handling fixes associated with NFC integration in the emulator. - Stability improvements from enforcing a single transport instance to prevent conflicts during transport selection and usage. Overall impact and accomplishments: - Expanded emulator capabilities to cover NFC-enabled workflows for Flex and Stax, enabling broader testing and QA coverage. - Refactored transport architecture to improve maintainability, testability, and consistency across protocols, reducing future integration risk. - Improved release hygiene and dependency management with 0.12.0, supporting smoother deployments and auditing of Python dependencies. Technologies/skills demonstrated: - Python-based refactoring and object-oriented design (inheritance for transport classes) and a unified transport abstraction. - CLI tooling and user-configurable protocol selection, enhancing operability for developers and QA. - Release automation and changelog/documentation discipline for product stability and traceability.