quantumlib/Cirq
What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.
Outside pull requests to quantumlib/Cirq got a first human reply in a median of 15.7 hours (141 pull requests, 19 April to 16 October 2026); 9% got none within 14 days. It ranks 1,101 of 3,219 overall. For first-time contributors it ranks 671 of 1,525 (the top 44%).
| Rank | 1,101 of 3,219 |
|---|---|
| Score | 54.45 |
| Tier | C |
| Median first reply | 15.7 hours |
| 14-day no-reply share | 9% |
| First-timer rank | 671 of 1,525 |
| Ecosystem | Python |
| Window | 19 April to 16 October 2026 |
Composite
- Rank
- 1,101 of 3,219
- Score
- 54.45
- Tier
- C
- Coverage
- 93% · Ceiling A
- Quadrant
- Nursery
Coordinates: leverage 48.5 (coverage 100%), friction 41.5 (coverage 90%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 79.6 | 100% |
| Criticality | 50.6 | 100% |
| Governance | 29.5 | 100% |
| Rigor | 57.6 | 100% |
| Accessibility | 49.0 | 50% |
The measured parameters
Responsiveness
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Decision Rate (90d)Share of outside pull requests that were merged or closed within 90 days. | 86.5% | 100.0 | 37 | 19 April to 18 July 2026 | primaryraw/pr_window/quantumlib__Cirq.json |
| PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days. | 9.2% | 81.6 | 98 | 20 April to 17 October 2026 | primaryraw/pr_window/quantumlib__Cirq.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 45.5% | 56.8 | 33 | — | primaryraw/author_history/quantumlib__Cirq.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | 15.7 hours (0.7 days) | 90.2 | 141 | 19 April to 16 October 2026 | primaryraw/pr_window/quantumlib__Cirq.json |
| Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged. | 444.3 hours (18.5 days) | 39.4 | 83 | 19 April to 16 October 2026 | primaryraw/pr_window/quantumlib__Cirq.json |
Criticality
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| DependentsPackages in the registry that depend on this project, counted once each. | 29 | 61.1 | — | — | primaryraw/dependents/quantumlib__Cirq.json |
| Monthly DownloadsDownloads from the package registry in a month. | 47,773 downloads a month | 39.8 | — | — | primaryraw/downloads/pypi__Cirq.json |
| OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals. | 0.4624 | 46.2 | — | — | primaryraw/github_meta/quantumlib__Cirq.json |
Governance
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Elephant FactorThe fewest organisations that account for half of the last year's commits. | 1 | 25.0 | 393 | — | primaryraw/commits_365d/quantumlib__Cirq.json |
| Legal IP RegimeThe contributor licence regime: DCO, none, a foundation CLA or a corporate CLA. | Company CLA | 25.0 | — | — | primaryraw/governance/quantumlib__Cirq.json |
| Promotion LadderHow openly a contributor can become a maintainer, from closed to verified. | No written path to becoming a maintainer | 40.0 | — | — | primaryraw/governance/quantumlib__Cirq.json |
Rigor
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| AI Policy PostureWhether the project has a written policy on AI-assisted contributions. | No written AI policy | 40.0 | — | — | primaryraw/governance/quantumlib__Cirq.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 78 | 78.0 | — | — | primaryraw/scorecard/quantumlib__Cirq.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 38.5% | 48.1 | 161 | 19 April to 16 October 2026 | primaryraw/pr_window/quantumlib__Cirq.json |
Accessibility
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals. | 70 | 70.0 | 23 | — | primaryraw/actions_runs/quantumlib__Cirq.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | Not shown: Collector failure | ||||
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 4 | 40.0 | — | — | primaryraw/gfi/quantumlib__Cirq.json |
| Newcomer Return RateShare of those merged first-time authors who sent a second pull request within 90 days. | Not shown: Collector failure | ||||
Persona view
| Persona | Rank | Score | Tier | Status |
|---|---|---|---|---|
| Balanced | 1,101 of 3,219 | 54.45 | C | Rated |
| First-timer | 671 of 1,525 | 57.81 | B | Rated |
| Career capital | This repository's production-criticality signal is not yet high enough for career-capital ranking. | |||
| Senior systems | Fewer than 3 organizations account for most commits (not multi-vendor). | |||
| AI-assisted | 1,113 of 3,696 | 55.54 | B | Rated |
Integrity
- Snapshot
- 2026-10-17
- Raw hash
- 66dde16eefd2882251cb4a6a868f4ebb407d1103237800804c6156d8fda7de08
No suspicion flags on this repository.
The full record is in data/2026-10-17/repos/d0.json, under the key quantumlib/Cirq.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). quantumlib/Cirq. Snapshot 2026-10-17. https://porchlamp.org/projects/quantumlib/cirq/. CC BY 4.0.
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