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EngineProcessor tests are flaky because of datetime.datetime.now() calls

kind/healthFor CI/testing/release process/refactoring/technical debt itemsFor CI/testing/release process/refactoring/technical debt items

Status: Open.

#7851 In quantumlib/Cirq;

· maffoo opened on Jan 22, 2026

ClassicalStateSimulator should support CSWAP gate

good first issueThis issue can be resolved by someone who is not familiar with the codebase. A good starting issue.This issue can be resolved by someone who is not familiar with the codebase. A good starting issue.

kind/feature-requestDescribes new functionalityDescribes new functionality

no QC knowledge neededWant to contribute to Cirq, but don't know quantum computing? This issue is for you.Want to contribute to Cirq, but don't know quantum computing? This issue is for you.

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7841 In quantumlib/Cirq;

· NoureldinYosri opened on Jan 16, 2026

Recursion support for CircuitOperation in map_clean_and_borrowable_qubits

kind/bug-reportSomething doesn't seem to work.Something doesn't seem to work.

Status: Open.

#7840 In quantumlib/Cirq;

· Vivek1106-04 opened on Jan 15, 2026

Support Python 3.14

area/python

kind/healthFor CI/testing/release process/refactoring/technical debt itemsFor CI/testing/release process/refactoring/technical debt items

priority/p1Fix is needed as soon as possible. Should be staffed. It is blocking some major flows for usersFix is needed as soon as possible. Should be staffed. It is blocking some major flows for users

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7832 In quantumlib/Cirq;

· pavoljuhas opened on Jan 12, 2026

Measurement and control keys can overlap in the same moment after circuit.insert

area/measurements

area/moments

kind/bug-reportSomething doesn't seem to work.Something doesn't seem to work.

triage/discussNeeds decision / discussion, bring these up during Cirq CynqueNeeds decision / discussion, bring these up during Cirq Cynque

Status: Open.

#7829 In quantumlib/Cirq;

· codrut3 opened on Jan 11, 2026

Improve speed of selected Cirq transformers

area/performance

good part-time projectA meaty non-urgent issue with a substantial amount of work to be done.A meaty non-urgent issue with a substantial amount of work to be done.

kind/taskA task that's part of a larger effortA task that's part of a larger effort

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

Task

#7797 In quantumlib/Cirq;

· pavoljuhas opened on Dec 8, 2025

·  

2025-T1: Performance improvements for large circuits

Convert ASV benchmarks to pytest-benchmark

area/performance

kind/taskA task that's part of a larger effortA task that's part of a larger effort

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7796 In quantumlib/Cirq;

· pavoljuhas opened on Dec 8, 2025

·  

2025-T2: Performance benchmarks & monitoring

Fix snippets_test.py::test_can_run_docs_code_snippets

good first issueThis issue can be resolved by someone who is not familiar with the codebase. A good starting issue.This issue can be resolved by someone who is not familiar with the codebase. A good starting issue.

kind/healthFor CI/testing/release process/refactoring/technical debt itemsFor CI/testing/release process/refactoring/technical debt items

no QC knowledge neededWant to contribute to Cirq, but don't know quantum computing? This issue is for you.Want to contribute to Cirq, but don't know quantum computing? This issue is for you.

skill-level/beginnerNo background required, self-contained issueNo background required, self-contained issue

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7787 In quantumlib/Cirq;

· pavoljuhas opened on Dec 2, 2025

Add CI check to enforce reasonable commit messages in dependabot PRs

kind/healthFor CI/testing/release process/refactoring/technical debt itemsFor CI/testing/release process/refactoring/technical debt items

no QC knowledge neededWant to contribute to Cirq, but don't know quantum computing? This issue is for you.Want to contribute to Cirq, but don't know quantum computing? This issue is for you.

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7786 In quantumlib/Cirq;

· pavoljuhas opened on Dec 1, 2025

Add State Preparation Algorithm to Cirq

kind/feature-requestDescribes new functionalityDescribes new functionality

status/rfc-neededThis needs an RFC document.This needs an RFC document.

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7774 In quantumlib/Cirq;

· ACE07-Sev opened on Nov 26, 2025

Request from for Protobuf version flexibility in cirq-google (Forschungszentrum Jülich)

area/releases

kind/healthFor CI/testing/release process/refactoring/technical debt itemsFor CI/testing/release process/refactoring/technical debt items

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

Task

#7753 In quantumlib/Cirq;

· AlvaroHuanay opened on Nov 14, 2025

Make it easier to efficiently construct large circuits from lists of operations

kind/feature-requestDescribes new functionalityDescribes new functionality

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

Enhancement

#7720 In quantumlib/Cirq;

· andbe91 opened on Oct 31, 2025