Month: 2026-03. Key feature delivered: Contour upgraded in cybozu/neco-containers from 1.33.0/1.33.2 to 1.33.3, bringing latest features, improvements, and fixes. Commits involved: 294fb3e6b83a7a2b048795b7534767cd7e4dd4bd and 13c042b720b13048a9c62fcb2909c24e6631e289, both signed off by Hiroki Hanada. Major bugs fixed: none reported this month. Overall impact: improved stability and reliability of the container platform, reduced technical debt, and readiness for downstream service enhancements through an up-to-date contour release. Technologies/skills demonstrated: dependency upgrade discipline, precise version control with traceable commits, signed-off release process, and adherence to change management best practices.

February 2026 – cybozu/neco-containers: Delivered stability improvements by upgrading core components tcp-keepalive and testhttpd to version 0.3.3 and rebuilding both to validate compatibility and reliability. The change is captured in commit 62765f0da2a183fa6d89f54d96d694794ed0bec9 (Signed-off-by Hiroki Hanada), strengthening container networking and HTTP tooling stability for production workloads.

November 2025 monthly summary for cybozu/neco-containers focused on delivering a critical compatibility upgrade and maintaining repository hygiene.

In October 2025, delivered a critical correctness fix for the LBIPAM conflicting pools metric in the cilium/cilium repository. Replaced the previous incremental update mechanism (Inc/Dec) with a full Set operation, ensuring that the metric recomputes accurately when conflicts are checked and reports 0 when no conflicts exist. This change enhances observability reliability and reduces ambiguity during incident triage in live environments.

August 2025 performance summary focusing on feature delivery for BGP-based LoadBalancer IP advertisements in the cilium/cilium repo. Introduced a configurable BGP origin attribute via Helm, defaulting to IGP with an INCOMPLETE option to align with MetalLB behavior during migration scenarios. This change mitigates ECMP issues during migrations and provides smoother transition paths for LoadBalancer IPs.

July 2025 (cybozu/neco-containers) delivered stability, security, and governance improvements through targeted upgrades of core platform components, networking/observability tooling, and a new version-consistency verification step. The changes reduce drift between deployed images and components and enhance operational confidence across the container platform.