March 2026 monthly summary for nrfconnect/sdk-nrf focusing on Bluetooth HCI address retrieval improvements. Delivered the Bluetooth HCI Address Retrieval Helper, introducing a reusable struct that encapsulates the number of static addresses returned and the first address, reducing boilerplate and parsing errors for downstream consumers of the VS HCI command. The change simplifies usage, improves reliability, and enhances developer productivity when reading static addresses via HCI. Key commit: 3d067a3aa9d788daff092ff9e37fe13e9914d556 (bluetooth: hci_vs_sdc: Add helper struct to read static address).

November 2025 (2025-11): Delivered a memory-usage optimization in the Bluetooth Controller Filter Accept List by introducing compile-time guards to exclude unnecessary commands when not required. This reduces the RAM/ROM footprint for constrained targets, achieving a 416-byte reduction in the peripheral_hids_keyboard image when built for the 54l15. The change leverages CONFIG_BT_CTLR_FILTER_ACCEPT_LIST guards and was implemented with a single focused commit to minimize impact (see commit 4f26ea9c44c8147c5af0fc212e0af714118b8c74).

Month 2025-10 highlights: Delivered concrete API and stability improvements across Nordic SDKs. Bluetooth HCI driver API modernization reduces legacy API surface and simplifies future integration with SDC; MPSL library revisions synchronized across platforms to ensure consistent builds; SoftDevice Controller stability improvements address high TX power reporting, event register handling, rare multi-peripheral issue, timing and memory definitions. Collectively, these changes reduce technical debt, improve cross-platform reliability, and enable faster feature delivery with a stable foundation.

In September 2025, contributed to the nrfconnect/sdk-nrf by implementing a backward-compatible HCI driver API transition to accommodate the upcoming sdc_support_* API changes. The change introduces conditional compilation to support both current and new API versions, enabling backward compatibility during transition until the new API is fully integrated into nrfxlib. This reduces risk of build failures during API evolution and supports a smoother upgrade path for downstream users.