sqlalchemy/alembic
What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.
Outside pull requests to sqlalchemy/alembic got a first human reply in a median of under 0.1 hours (23 pull requests, 19 April to 16 October 2026); 38% got none within 14 days. It ranks 1,398 of 3,219 overall. It is not ranked for first-time contributors: this repository does not show a low enough barrier for a first-time contributor.
| Rank | 1,398 of 3,219 |
|---|---|
| Score | 52.12 |
| Tier | C |
| Median first reply | under 0.1 hours |
| 14-day no-reply share | 38% |
| First-timer rank | This repository does not show a low enough barrier for a first-time contributor. |
| Ecosystem | Python |
| Window | 19 April to 16 October 2026 |
Composite
- Rank
- 1,398 of 3,219
- Score
- 52.12
- Tier
- C
- Coverage
- 89% · Ceiling A
- Quadrant
- Crucible
Coordinates: leverage 62.3 (coverage 100%), friction 54.9 (coverage 80%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 51.9 | 65% |
| Criticality | 76.9 | 100% |
| Governance | 50.5 | 100% |
| Rigor | 45.7 | 100% |
| Accessibility | 19.8 | 85% |
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. | Not shown: Insufficient sample size | ||||
| PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days. | 37.5% | 25.0 | 24 | 20 April to 17 October 2026 | primaryraw/pr_window/sqlalchemy__alembic.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 0.0% | 0.0 | 13 | — | primaryraw/author_history/sqlalchemy__alembic.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | 0.0 hours (0 days) | 100.0 | 23 | 19 April to 16 October 2026 | primaryraw/pr_window/sqlalchemy__alembic.json |
| Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged. | Not shown: Insufficient sample size | ||||
Criticality
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| DependentsPackages in the registry that depend on this project, counted once each. | 620 | 89.6 | — | — | primaryraw/dependents/sqlalchemy__alembic.json |
| Monthly DownloadsDownloads from the package registry in a month. | 179.1 million downloads a month | 95.7 | — | — | primaryraw/downloads/pypi__alembic.json |
| OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals. | 0.4887 | 48.9 | — | — | primaryraw/github_meta/sqlalchemy__alembic.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 | 118 | — | primaryraw/commits_365d/sqlalchemy__alembic.json |
| Legal IP RegimeThe contributor licence regime: DCO, none, a foundation CLA or a corporate CLA. | No CLA or sign-off found | 85.0 | — | — | primaryraw/governance/sqlalchemy__alembic.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/sqlalchemy__alembic.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/sqlalchemy__alembic.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 47.5 | 47.5 | — | — | primaryraw/scorecard/sqlalchemy__alembic.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 39.3% | 49.1 | 28 | 19 April to 16 October 2026 | primaryraw/pr_window/sqlalchemy__alembic.json |
Accessibility
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals. | 50 | 50.0 | 30 | — | primaryraw/actions_runs/sqlalchemy__alembic.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | 13.3% | 26.7 | 15 | — | primaryraw/author_history/sqlalchemy__alembic.json |
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 0 | 0.0 | — | — | primaryraw/gfi/sqlalchemy__alembic.json |
| Newcomer Return RateShare of those merged first-time authors who sent a second pull request within 90 days. | Not shown: Insufficient sample size | ||||
Persona view
| Persona | Rank | Score | Tier | Status |
|---|---|---|---|---|
| Balanced | 1,398 of 3,219 | 52.12 | C | Rated |
| First-timer | This repository does not show a low enough barrier for a first-time contributor. | |||
| Career capital | 566 of 798 | 53.39 | C | Rated |
| Senior systems | Fewer than 3 organizations account for most commits (not multi-vendor). | |||
| AI-assisted | 1,677 of 3,696 | 51.32 | C | Rated |
Integrity
- Snapshot
- 2026-10-17
- Raw hash
- 4dc9e5f772b849cb255317724a99b53d192f943c2f6f8b4ecf2919d7ceebdfa6
No suspicion flags on this repository.
The full record is in data/2026-10-17/repos/7f.json, under the key sqlalchemy/alembic.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). sqlalchemy/alembic. Snapshot 2026-10-17. https://porchlamp.org/projects/sqlalchemy/alembic/. CC BY 4.0.
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