# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

### Added
- Comprehensive NVMe benchmark for Samsung PM9A1 before firmware update: SMART health, hdparm, fio seq/rand benchmarks (2026-04-02). See `docs/tech/nvme-benchmark-pre-gxa7802q.md`.
- CLI suite update script `scripts/update-cli-suite.sh` for Manjaro/Arch tool maintenance (2026-04-02).

### Changed
- Samsung PM9A1 NVMe firmware update applied: GXA7401Q → GXA7801Q (non-SED variant, reboot pending to activate). All nvme-cli steps succeeded (2026-04-02).
- Corrected firmware research: GXA7802Q is SED-only (`00B07`); non-SED drives (`00B00`) require GXA7801Q. Updated `docs/tech/firmware-update-research.md` with naming convention and correct source.
- Updated `.gitignore`: added `logs/` and `docs/tech/capabilities/` exclusions (2026-04-02).

### Added (continued)
- Created formal stability tests report documenting the 2026-03-17 memory management improvements (2026-03-17).
- System stability improvements: enabled `systemd-oomd` and `zswap` via Ansible (2026-03-17).
- Memory resource limits for Firebird and Mailpit Docker containers (2026-03-17).
- Implemented and verified advanced memory optimizations: zswap 30% pool, THP madvise, and proactive kernel reclaim tuning (2026-03-17).
- Integrated 16GB swap file management into Ansible roles for consistency and persistence (2026-03-17).
- Comprehensive health report for `mw-pfeddersheim-workstation` (2026-03-09).

### Changed (continued)
- Increased system swap file size from 4GB to 16GB to prevent OOM-related system hangs (2026-03-17).
- Updated system status in `README.md` and `docs/tech/workstation-health.md` (2026-03-17).
- Cleaned up deprecated software information from `docs/tech/stack.md` (2026-03-13).
- Synchronized software versions across documentation files (2026-03-13).

### Fixed
- Resolved system unresponsiveness issue by addressing critical memory/swap pressure with increased headroom and proactive OOM killing (2026-03-17).
- Identified failed `archlinux-keyring-wkd-sync.service` in system health check.