rust-lang/mdBook
What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.
Outside pull requests to rust-lang/mdBook got a first human reply in a median of 6.3 days (67 pull requests, 10 April to 7 October 2026); 52% got none within 14 days. It ranks 1,620 of 3,219 overall. For first-time contributors it ranks 1,307 of 1,525 (the bottom 15%).
| Rank | 1,620 of 3,219 |
|---|---|
| Score | 50.32 |
| Tier | C |
| Median first reply | 6.3 days (150.6 hours) |
| 14-day no-reply share | 52% |
| First-timer rank | 1,307 of 1,525 |
| Ecosystem | Rust |
| Window | 10 April to 7 October 2026 |
Composite
- Rank
- 1,620 of 3,219
- Score
- 50.32
- Tier
- C
- Coverage
- 100% · Full
- Quadrant
- Crucible
Coordinates: leverage 58.5 (coverage 100%), friction 57.0 (coverage 100%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 39.1 | 100% |
| Criticality | 64.8 | 100% |
| Governance | 50.5 | 100% |
| Rigor | 53.5 | 100% |
| Accessibility | 41.5 | 100% |
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. | 74.4% | 93.0 | 39 | 10 April to 9 July 2026 | primaryraw/pr_window/rust-lang__mdBook.json |
| PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days. | 52.3% | 0.0 | 88 | 20 April to 17 October 2026 | primaryraw/pr_window/rust-lang__mdBook.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 44.0% | 55.0 | 25 | — | primaryraw/author_history/rust-lang__mdBook.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | 150.6 hours (6.3 days) | 8.8 | 67 | 10 April to 7 October 2026 | primaryraw/pr_window/rust-lang__mdBook.json |
| Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged. | 669.2 hours (27.9 days) | 22.1 | 62 | 10 April to 7 October 2026 | primaryraw/pr_window/rust-lang__mdBook.json |
Criticality
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| DependentsPackages in the registry that depend on this project, counted once each. | 175 | 78.8 | — | — | primaryraw/dependents/rust-lang__mdBook.json |
| Monthly DownloadsDownloads from the package registry in a month. | 476,787 downloads a month | 66.6 | — | — | primaryraw/downloads/crates__mdBook.json |
| OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals. | 0.4749 | 47.5 | — | — | primaryraw/github_meta/rust-lang__mdBook.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 | 300 | — | primaryraw/commits_365d/rust-lang__mdBook.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/rust-lang__mdBook.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/rust-lang__mdBook.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/rust-lang__mdBook.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 85 | 85.0 | — | — | primaryraw/scorecard/rust-lang__mdBook.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 20.0% | 25.0 | 105 | 10 April to 7 October 2026 | primaryraw/pr_window/rust-lang__mdBook.json |
Accessibility
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals. | 70 | 70.0 | 30 | — | primaryraw/actions_runs/rust-lang__mdBook.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | 35.7% | 71.4 | 14 | — | primaryraw/author_history/rust-lang__mdBook.json |
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 0 | 0.0 | — | — | primaryraw/gfi/rust-lang__mdBook.json |
| Newcomer Return RateShare of those merged first-time authors who sent a second pull request within 90 days. | 20.0% | 40.0 | 5 | — | primaryraw/author_history/rust-lang__mdBook.json |
Persona view
| Persona | Rank | Score | Tier | Status |
|---|---|---|---|---|
| Balanced | 1,620 of 3,219 | 50.32 | C | Rated |
| First-timer | 1,307 of 1,525 | 45.53 | C | Rated |
| Career capital | 620 of 798 | 51.72 | C | Rated |
| Senior systems | Fewer than 3 organizations account for most commits (not multi-vendor). | |||
| AI-assisted | 1,697 of 3,696 | 51.22 | C | Rated |
Integrity
- Snapshot
- 2026-10-17
- Raw hash
- 9c22628bf82e8e22501dd12b255eb3450d1b692adc8ec7df9562091f29de9783
closed_unread
The full record is in data/2026-10-17/repos/1d.json, under the key rust-lang/mdBook.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). rust-lang/mdBook. Snapshot 2026-10-17. https://porchlamp.org/projects/rust-lang/mdbook/. CC BY 4.0.
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