February 2026 focused on coordinated releases and structural improvements across CQCL/tket2, CQCL/hugr, and CQCL/guppylang. The month delivered release-driven feature updates, standardized component interfaces, and groundwork for broader language bindings, reinforcing platform stability and developer productivity.

January 2026 performance snapshot across CQCL repositories (hugr, tket2, guppylang). Focused on delivering business-value features, stabilizing extension ecosystems, and improving developer ergonomics through better dependency management and release automation. The month delivered notable feature releases, targeted bug fixes, and cross-repo improvements that reduce integration risk and enable faster iteration.

December 2025 was focused on delivering stable, value-driven releases across CQCL toolchains and reinforcing API stability and performance through targeted refactors and bug fixes. Across tket2, guppylang, and hugr, we completed major releases, introduced new capabilities for runtime passes, improved unitarity annotations, and enhanced policy-driven configurations, while addressing critical array linearization and compatibility issues to reduce downstream maintenance. The work aligns with business goals of enabling broader adoption, improving developer experience, and preparing the codebase for easier future integrations.

Monthly summary for 2025-11: This period focused on delivering a cohesive, platform-spanning release and expanding Python integration, with performance, portability, and developer tooling improvements across Hugr and TKet2. Key outcomes include a multi-component Hugr 0.24.x release across hugr-model, hugr-core, hugr-llvm, hugr-passes, and hugr-cli with version bumps to 0.24.1–0.24.3; Hugr-py 0.14.2 release introducing Python bindings and a CLI interface; GPU lowering for the selene-hugr-qis-compiler to accelerate execution and address a runtime panic for affine/bool arrays; Python bindings to expose tket1-passes; and macOS/Apple Silicon compatibility improvements and build fixes for tket-py across 0.12.x. These efforts reduce deployment friction, accelerate runtimes, broaden Python-based workflows, and enhance cross-platform support for production use.

October 2025 was a focused, multi-repo release sprint across the Hugr and TKET2 ecosystems. Deliveries centered on core library robustness, language bindings, and cross-tooling interoperability, with careful attention to performance and downstream integration. The month saw coordinated releases across Hugr core libraries, Python bindings, and multiple TKET/QIS components, underpinned by release automation and dependency alignment.

September 2025 saw a coordinated release-driven sprint across CQCL/tket2, CQCL/hugr, and CQCL/guppylang. The work focused on packaging maturity, platform readiness, and enhancements to type-safety and error handling, delivering tangible business value for downstream users and integrations. Highlights include a major tket-exts 0.11.0 release with a new GPU module, explicit exports, and a WASM extension refactor; automated release management across tket-py and core crates; Hugr 0.22.3 and 0.23.0 releases with new features and breaking changes; and Guppylang improvements delivering self type inference for methods, a robust Result type, and separate compile_entrypoint/compile_function APIs. Across all repos, these efforts improved packaging reliability, reduced time-to-delivery for downstream projects, and strengthened developer experience and runtime safety.

August 2025 highlights across CQCL repositories focused on delivering robust API surfaces, stable internals, and coordinated multi-repo releases that drive business value and developer productivity. This month featured major public API upgrades, strategic internal refactors, and automated release workflows across GuppyLang, Hugr, and tket2, enabling faster iteration and more reliable software delivery.

July 2025 performance summary for CQCL development: Delivered cross-repo features and stability improvements across tket2 and hugr. Implemented LLVM-based code generation for tket2.bool, inlining constant functions in tket2-hseries, and introduced a qsystem operation to detect measure leakage. Expanded Py bindings with CustomPass labeling and barrier encoding/decoding, and added array lowering in tket-qsystem. Initiated API unification from tket2.* to tket.* across ext/eccs/py. Executed multiple releases to improve stability and automation (tket-py 0.12.1, Hugr Core 0.22.0, Hugr-py 0.13.0rc1, Hugr Core Patch Release, and tket API renames). Resolved notable bugs to stabilize Python builders and static output ports.

June 2025 delivered cross-repo features and stability improvements across CQCL/tket2, CQCL/hugr, and CQCL/guppylang, driving faster quantum tooling, robust encoding, and richer standard libraries. The month focused on expressivity, codegen and encoding performance, and release automation to support business value and developer productivity.

In May 2025, released major launches across CQCL projects (hugr, tket2, guppylang), focusing on API stabilization, cross-language serialization, and MSRV updates. Hugr core 0.20.0 introduced architectural changes and envelope-based serialization across crates, standardized the Module root for region hierarchies, and shipped updated minimum Rust version and changelogs. Hugr-py 0.12.x series added entrypoints to Hugrs, envelope-based serialization/deserialization, improved array handling, and removed deprecated features with versioned changelogs. The tket2 family delivered coordinated releases (tket2, tket2-hseries, tket2-exts, tket2-eccs, tket2-py) including MSRV bumps, new features (SimpleReplacement lazify fix, debug extension, ReplaceBoolPass, RuntimeBarrier), and breaking API changes to align with Hugr 0.20. Guppylang releases added explicit copy diagnostic hints (0.18.2), a stack data structure and generic sampling (0.19.0), and bool/bool unification with random angle generation (0.19.1); all with corresponding Hugr version updates and cleanup. Impacted areas include improved API consistency, cross-language interoperability, and release hygiene, reducing integration risk and accelerating downstream development."

April 2025 monthly summary: Delivered focused feature releases and reinforced release hygiene across CQCL/hugr and CQCL/guppylang. Key outcomes include Hugr-py 0.11.5 with package and envelope support and Result class reorganization, and Guppylang 0.18.1 with a version bump and changelog updates, both coordinated via automated release workflows. The month emphasized stability, data modeling improvements, and forward-facing APIs to enable smoother downstream integrations and future feature delivery. Technologies demonstrated include Python packaging and distribution, semantic versioning, and release automation (release-please), along with metadata modeling for order edges. Note: No explicit major bugs fixed are recorded in the provided data; efforts focused on feature delivery, refactoring, and release process improvements to reduce future risk.

March 2025 results across CQCL/tket2, CQCL/hugr, and CQCL/guppylang focused on delivering new features, stability improvements, and release readiness that drive business value and engineering efficiency.

February 2025 performance summary focusing on delivering features, stabilizing the toolchain, and enabling cross-repo interoperability across three CQCL repositories (tket2, guppylang, hugr).