mamba-org/mamba
What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.
Outside pull requests to mamba-org/mamba got a first human reply in a median of 34.6 hours (19 pull requests, 18 April to 15 October 2026); 15% got none within 14 days. It ranks 1,513 of 3,219 overall. For first-time contributors it ranks 1,109 of 1,525 (the bottom 28%).
| Rank | 1,513 of 3,219 |
|---|---|
| Score | 51.26 |
| Tier | C |
| Median first reply | 34.6 hours |
| 14-day no-reply share | 15% |
| First-timer rank | 1,109 of 1,525 |
| Ecosystem | C and C++ |
| Window | 18 April to 15 October 2026 |
Composite
- Rank
- 1,513 of 3,219
- Score
- 51.26
- Tier
- C
- Coverage
- 92% · Ceiling A
- Quadrant
- Nursery
Coordinates: leverage 49.5 (coverage 100%), friction 44.5 (coverage 85%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 65.2 | 75% |
| Criticality | 47.9 | 100% |
| Governance | 55.8 | 100% |
| Rigor | 47.8 | 100% |
| Accessibility | 31.0 | 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. | 15.4% | 69.2 | 13 | 20 April to 17 October 2026 | primaryraw/pr_window/mamba-org__mamba.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 66.7% | 83.3 | 6 | — | primaryraw/author_history/mamba-org__mamba.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | 34.6 hours (1.4 days) | 61.8 | 19 | 18 April to 15 October 2026 | primaryraw/pr_window/mamba-org__mamba.json |
| Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged. | 570.8 hours (23.8 days) | 33.2 | 17 | 18 April to 15 October 2026 | primaryraw/pr_window/mamba-org__mamba.json |
Criticality
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| DependentsPackages in the registry that depend on this project, counted once each. | Not shown: Not applicable | ||||
| Monthly DownloadsDownloads from the package registry in a month. | Not shown: Not applicable | ||||
| OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals. | 0.4791 | 47.9 | — | — | proxy:no_dependents_signalraw/github_meta/mamba-org__mamba.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 | 208 | — | primaryraw/commits_365d/mamba-org__mamba.json |
| Legal IP RegimeThe contributor licence regime: DCO, none, a foundation CLA or a corporate CLA. | Sign-off on commits (DCO) | 100.0 | — | — | primaryraw/governance/mamba-org__mamba.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/mamba-org__mamba.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/mamba-org__mamba.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 72.5 | 72.5 | — | — | primaryraw/scorecard/mamba-org__mamba.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 18.2% | 22.7 | 22 | 18 April to 15 October 2026 | primaryraw/pr_window/mamba-org__mamba.json |
Accessibility
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals. | 20 | 20.0 | 9 | — | primaryraw/actions_runs/mamba-org__mamba.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | 33.3% | 66.7 | 9 | — | primaryraw/author_history/mamba-org__mamba.json |
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 0 | 0.0 | — | — | primaryraw/gfi/mamba-org__mamba.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 | 1,513 of 3,219 | 51.26 | C | Rated |
| First-timer | 1,109 of 1,525 | 50.06 | C | 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 | 1,752 of 3,696 | 50.83 | C | Rated |
Integrity
- Snapshot
- 2026-10-17
- Raw hash
- 0157f185c6fcc331496f1613f87567380bd0885e19771aa0b248d45e6e5327e5
No suspicion flags on this repository.
The full record is in data/2026-10-17/repos/dd.json, under the key mamba-org/mamba.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). mamba-org/mamba. Snapshot 2026-10-17. https://porchlamp.org/projects/mamba-org/mamba/. CC BY 4.0.
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