Three merged contributions to Qiskit and Cirq covering control-flow angle wrapping, tests for two-qubit block consolidation, and NumPy Generator support.
What I currently believe
Small, tested changes can improve quantum software reliability, from handling random generators to applying transpiler passes inside control flow.
Evidence
Qiskit PRs #17259 and #17349 and Cirq PR #8382 merged upstream. Together they cover basis-gate selection during consolidation, angle wrapping inside control flow, and supported random-generator inputs.
Qiskit block consolidation with an explicit basis gate
I added tests for the kak_basis_gate argument to Qiskit’s ConsolidateBlocks transpiler pass. The first test checks that the pass replaces a two-qubit circuit with a single unitary that preserves the original operation when given CX, CZ, ECR, or iSWAP as the basis gate. After code review, I added a second test that checks whether changing the basis affects the decomposition estimate. For the same two-qubit unitary, the decomposer estimates one CX gate or two iSWAP gates. Qiskit issue #17167
The tests merged into Qiskit on November 9, 2026. Qiskit PR #17259
Qiskit: angle wrapping inside control flow
Qiskit’s WrapAngles transpiler pass was failing to respect angle bounds inside control flow (issue #17316). I added the trivial_recurse annotation so the pass also processes those nested blocks, along with a regression test and release note.
After revisions through code review, Qiskit PR #17349 was merged on November 3, 2026.
Cirq: random generator support
I implemented a part of Cirq issue #8374, which called for support for NumPy’s modern numpy.random.Generator API. The change added the public PRNG_OR_SEED_LIKE type and parse_random_generator parser, exported the API, and tested supported and invalid inputs. The accepted inputs include integer seeds, None, numpy.random.Generator, and the existing numpy.random.RandomState path.
Cirq PR #8382 was merged into quantumlib/Cirq on September 29, 2026. The work was reviewed and updated through the PR process.