January 2026 Monthly Summary – Haskell Language Server (haskell/haskell-language-server) Overview: Delivered GHC 9.14 compatibility and hardened CI/test infrastructure to enable reliable cross-version support. Focused on stabilizing tests, improving build configurations, and reducing developer friction through CI and pre-commit improvements. Key deliverables: - Haskell Language Server: GHC 9.14 compatibility - Updated build configurations, plugin tests, and CI settings to ensure compatibility across GHC versions. - Enabled ghcide build and plugin tests to run with GHC 9.14; adjusted tests and CI accordingly. - CI updated to cabal 3.16.1.0 and related workflow tweaks to improve stability. Major bugs fixed: - Fixed test stability for GHC 9.14 across the pipeline: func-test adjustments, hls-eval-plugin tests, and type-signature test suite fixes. - Refactor plugin changes stabilized (undo of risky refactor plugin changes). - CI/DevX improvements: pre-commit hook fixes; reduced flakiness through targeted test adjustments; Windows long path handling via shorter build directories; use of temporary directories for cabal-add tests. Overall impact and accomplishments: - Business value: Enables users to upgrade to GHC 9.14 with minimal disruption, expanding supported environments and improving product reliability. - Technical stability: Cross-version compatibility validated; test suites stabilized; CI reliability improved, reducing cycle time for release readiness. - Developer velocity: Reduced CI noise, improved pre-commit hygiene, and better cross-platform path handling. Technologies/skills demonstrated: - Haskell tooling: GHC, ghcide, HLS plugins, Cabal builds, and plugin tests. - CI/CD: cabal version management, CI workflow refinements, Windows path mitigations. - Testing: Test stabilization for func-test, hls-eval-plugin, and change-type-signature suites. - Platform considerations: Cross-version compatibility and Windows path handling.

December 2025 monthly summary for developer work on haskell/haskell-language-server focusing on reliability and cross-platform CI stability.

September 2025 monthly summary for the haskell-language-server workstream. Focused on release engineering and packaging for the 2.12.0.0 release, updating the release automation, and aligning platform support with current technologies. Delivered consolidated packaging updates and improved metadata accuracy to support distribution and downstream CI.

In July 2025, focused on stability and compatibility improvements for input-output-hk/haskell-language-server. Implemented a targeted fix to the cabal-add dependency bound for the hls-cabal-plugin, upgrading the bound to ^>=0.1 to enhance compatibility and reduce build issues across environments. This work reduces dependency churn and improves the reliability of the HLS in user projects and CI pipelines.

Month: 2025-05 — Focused on release readiness for Haskell Language Server v2.11.0 through CI/build improvements, platform updates, and artifact handling. Deprecated outdated environments to reduce maintenance, standardized CI locale for reproducibility, and streamlined release artifact snippet generation and upload configuration. Result: more robust, faster releases with broader platform support and lower risk of release defects.

March 2025: Focused on stabilizing and accelerating the release process for input-output-hk/haskell-language-server and laying groundwork for broader GHC support. Implemented a multi-OS, multi-architecture binary release workflow, enhanced CI isolation with per-Linux-distro Docker actions, and added compatibility improvements for GHC 9.12. These changes deliver faster, more reliable releases and broaden platform coverage, enabling the project to serve a larger Haskell developer audience with fewer release-maintenance overhead.