January 2026 Monthly Summary — sst/opencode Key features delivered: - Unified Diff-based File Change Tracking: Implemented functionality to track file modifications by applying a unified diff to the original content, enhancing ACP’s ability to manage and audit file changes. Major bugs fixed: - None reported in this period. Overall impact and accomplishments: - Improves change-tracking accuracy and auditability across code changes, enabling faster triage, better compliance, and more reliable rollout safeguards. Establishes groundwork for enhanced change-management workflows in ACP. Technologies/skills demonstrated: - Patch/diff application logic and content transformation. - Diff-based change tracking aligned with version-control workflows. - Collaboration and code ownership evidenced by a co-authored commit. Top 3-5 achievements: - Delivered Unified Diff-based File Change Tracking for sst/opencode (patch-based change tracking). - Implemented diff application against original content to capture precise file modifications; commit 44fa3d5392d1a4c4cda65395be309d5420ee17ed (feat(acp): track file modified (#7723)). - Laid groundwork for enhanced auditability, change-management workflows, and safer deployments. - Demonstrated collaboration and code-health practices through co-authored work.