immerjs/immer
What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.
Outside pull requests to immerjs/immer got a first human reply in a median of 15.9 hours (12 pull requests, 18 April to 15 October 2026); 48% got none within 14 days. It ranks 826 of 3,219 overall. For first-time contributors it ranks 1,145 of 1,525 (the bottom 25%).
| Rank | 826 of 3,219 |
|---|---|
| Score | 56.81 |
| Tier | B |
| Median first reply | 15.9 hours |
| 14-day no-reply share | 48% |
| First-timer rank | 1,145 of 1,525 |
| Ecosystem | JavaScript |
| Window | 18 April to 15 October 2026 |
Composite
- Rank
- 826 of 3,219
- Score
- 56.81
- Tier
- B
- Coverage
- 93% · Ceiling A
- Quadrant
- Sweet Spot
Coordinates: leverage 63.0 (coverage 100%), friction 45.0 (coverage 90%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 68.5 | 100% |
| Criticality | 76.5 | 100% |
| Governance | 59.3 | 100% |
| Rigor | 43.2 | 100% |
| Accessibility | 15.0 | 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. | 92.3% | 100.0 | 13 | 18 April to 17 July 2026 | primaryraw/pr_window/immerjs__immer.json |
| PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days. | 48.3% | 3.4 | 29 | 20 April to 17 October 2026 | primaryraw/pr_window/immerjs__immer.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 58.3% | 72.9 | 12 | — | primaryraw/author_history/immerjs__immer.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | 15.9 hours (0.7 days) | 89.7 | 12 | 18 April to 15 October 2026 | primaryraw/pr_window/immerjs__immer.json |
| Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged. | 825.3 hours (34.4 days) | 14.6 | 51 | 18 April to 15 October 2026 | primaryraw/pr_window/immerjs__immer.json |
Criticality
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| DependentsPackages in the registry that depend on this project, counted once each. | 5,437 | 87.6 | — | — | primaryraw/dependents/immerjs__immer.json |
| Monthly DownloadsDownloads from the package registry in a month. | 261.1 million downloads a month | 94.2 | — | — | primaryraw/downloads/npm__immer.json |
| OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals. | 0.5109 | 51.1 | — | — | primaryraw/github_meta/immerjs__immer.json |
Governance
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Elephant FactorThe fewest organisations that account for half of the last year's commits. | 2 | 50.0 | 69 | — | primaryraw/commits_365d/immerjs__immer.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/immerjs__immer.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/immerjs__immer.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/immerjs__immer.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 75 | 75.0 | — | — | primaryraw/scorecard/immerjs__immer.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 3.1% | 3.9 | 64 | 18 April to 15 October 2026 | primaryraw/pr_window/immerjs__immer.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/immerjs__immer.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | Not shown: Insufficient sample size | ||||
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 0 | 0.0 | — | — | primaryraw/gfi/immerjs__immer.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 | 826 of 3,219 | 56.81 | B | Rated |
| First-timer | 1,145 of 1,525 | 49.32 | C | Rated |
| Career capital | 462 of 798 | 56.67 | B | Rated |
| Senior systems | Fewer than 3 organizations account for most commits (not multi-vendor). | |||
| AI-assisted | 1,250 of 3,696 | 54.49 | C | Rated |
Integrity
- Snapshot
- 2026-10-17
- Raw hash
- 219943a0a2542f02de22cd4ab0ea4e3edac2dc13cb3c8022ee5f58373d29b0a9
No suspicion flags on this repository.
The full record is in data/2026-10-17/repos/cb.json, under the key immerjs/immer.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). immerjs/immer. Snapshot 2026-10-17. https://porchlamp.org/projects/immerjs/immer/. CC BY 4.0.
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