mit-pdos/xv6-riscv
What happens to a stranger's pull request here, in the Porchlamp snapshot of 5 November 2026.
For mit-pdos/xv6-riscv, the reply time has too small a sample to measure (0 pull requests counted; 10 needed). 67% of 27 outside pull requests got no reply within 14 days (27 April to 24 October 2026). It ranks 3,771 of 4,044 overall. It is not ranked for first-time contributors: this repository does not show a low enough barrier for a first-time contributor.
| Rank | 3,771 of 4,044 |
|---|---|
| Score | 38.52 |
| Tier | D |
| Median first reply | — |
| 14-day no-reply share | 67% |
| First-timer rank | This repository does not show a low enough barrier for a first-time contributor. |
| Ecosystem | C and C++ |
| Window | 27 April to 24 October 2026 |
Composite
- Rank
- 3,771 of 4,044
- Score
- 38.52
- Tier
- D
- Coverage
- 88% · Ceiling A
- Quadrant
- Graveyard
Coordinates: leverage 41.7 (coverage 100%), friction 60.9 (coverage 77%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 42.5 | 60% |
| Criticality | 39.0 | 100% |
| Governance | 50.5 | 100% |
| Rigor | 40.3 | 100% |
| Accessibility | 13.4 | 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. | 93.3% | 100.0 | 15 | 25 April to 24 July 2026 | primaryraw/pr_window/mit-pdos__xv6-riscv.json |
| PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days. | 66.7% | 0.0 | 27 | 27 April to 24 October 2026 | primaryraw/pr_window/mit-pdos__xv6-riscv.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 1.9% | 2.4 | 52 | — | primaryraw/author_history/mit-pdos__xv6-riscv.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | Not shown: Insufficient sample size | ||||
| 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. | 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. | 0.39 | 39.0 | — | — | proxy:no_dependents_signalraw/github_meta/mit-pdos__xv6-riscv.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 | 70 | — | primaryraw/commits_365d/mit-pdos__xv6-riscv.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/mit-pdos__xv6-riscv.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/mit-pdos__xv6-riscv.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/mit-pdos__xv6-riscv.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 52.5 | 52.5 | — | — | primaryraw/scorecard/mit-pdos__xv6-riscv.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 19.4% | 24.2 | 31 | 25 April to 22 October 2026 | primaryraw/pr_window/mit-pdos__xv6-riscv.json |
Accessibility
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals. | 50 | 50.0 | 26 | — | primaryraw/actions_runs/mit-pdos__xv6-riscv.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | 5.6% | 11.1 | 18 | — | primaryraw/author_history/mit-pdos__xv6-riscv.json |
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 0 | 0.0 | — | — | primaryraw/gfi/mit-pdos__xv6-riscv.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 | 3,771 of 4,044 | 38.52 | D | Rated |
| First-timer | This repository does not show a low enough barrier for a first-time contributor. | |||
| 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 | 3,783 of 4,002 | 39.30 | D | Rated |
Integrity
- Snapshot
- 2026-11-05
- Raw hash
- 7173f9b975f000b43f3637d2b11b45afbc161a4687bfedfd8817b8fa10a9f13b
closed_unread
The full record is in data/2026-11-05/repos/4e.json, under the key mit-pdos/xv6-riscv.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). mit-pdos/xv6-riscv. Snapshot 2026-11-05. https://porchlamp.org/projects/mit-pdos/xv6-riscv/. CC BY 4.0.
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