PorchlampFind the projects that leave the light on.2026-10-17

What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.

Outside pull requests to mobxjs/mobx got a first human reply in a median of 33.3 hours (17 pull requests, 18 April to 15 October 2026); 29% got none within 14 days. It ranks 585 of 3,219 overall. For first-time contributors it ranks 789 of 1,525 (the bottom 49%).

Key facts
Rank585 of 3,219
Score58.98
TierB
Median first reply33.3 hours
14-day no-reply share29%
First-timer rank789 of 1,525
EcosystemJavaScript
Window18 April to 15 October 2026

Composite

Rank
585 of 3,219
Score
58.98
Tier
B
Coverage
100% · Full
Quadrant
Sweet Spot

Coordinates: leverage 60.3 (coverage 100%), friction 40.6 (coverage 100%)

Five pillars

Score out of 100, and how much of the pillar was measured
PillarScoreCoverage
Responsiveness66.2100%
Criticality71.8100%
Governance59.3100%
Rigor41.7100%
Accessibility42.5100%

The measured parameters

Responsiveness

ParameterValueScoreCountWindowSource
Decision Rate (90d)Share of outside pull requests that were merged or closed within 90 days.100.0%100.01118 April to 17 July 2026primaryraw/pr_window/mobxjs__mobx.json
PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days.28.6%42.92120 April to 17 October 2026primaryraw/pr_window/mobxjs__mobx.json
First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged.57.1%71.414—primaryraw/author_history/mobxjs__mobx.json
Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply.33.3 hours (1.4 days)63.21718 April to 15 October 2026primaryraw/pr_window/mobxjs__mobx.json
Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged.811.3 hours (33.8 days)15.24218 April to 15 October 2026primaryraw/pr_window/mobxjs__mobx.json

Criticality

ParameterValueScoreCountWindowSource
DependentsPackages in the registry that depend on this project, counted once each.4,80586.6——primaryraw/dependents/mobxjs__mobx.json
Monthly DownloadsDownloads from the package registry in a month.15.7 million downloads a month73.9——primaryraw/downloads/npm__mobx.json
OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals.0.533853.4——primaryraw/github_meta/mobxjs__mobx.json

Governance

ParameterValueScoreCountWindowSource
Elephant FactorThe fewest organisations that account for half of the last year's commits.250.091—primaryraw/commits_365d/mobxjs__mobx.json
Legal IP RegimeThe contributor licence regime: DCO, none, a foundation CLA or a corporate CLA.No CLA or sign-off found85.0——primaryraw/governance/mobxjs__mobx.json
Promotion LadderHow openly a contributor can become a maintainer, from closed to verified.No written path to becoming a maintainer40.0——primaryraw/governance/mobxjs__mobx.json

Rigor

ParameterValueScoreCountWindowSource
AI Policy PostureWhether the project has a written policy on AI-assisted contributions.No written AI policy40.0——primaryraw/governance/mobxjs__mobx.json
Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100.6565.0——primaryraw/scorecard/mobxjs__mobx.json
Substantive Review RateShare of decided pull requests that received a substantive review.9.8%12.35118 April to 15 October 2026primaryraw/pr_window/mobxjs__mobx.json

Accessibility

ParameterValueScoreCountWindowSource
Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals.5050.030—primaryraw/actions_runs/mobxjs__mobx.json
Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days.54.6%100.011—primaryraw/author_history/mobxjs__mobx.json
Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers.00.0——primaryraw/gfi/mobxjs__mobx.json
Newcomer Return RateShare of those merged first-time authors who sent a second pull request within 90 days.0.0%0.07—primaryraw/author_history/mobxjs__mobx.json

Persona view

PersonaRankScoreTierStatus
Balanced585 of 3,21958.98BRated
First-timer789 of 1,52556.15BRated
Career capital344 of 79859.93BRated
Senior systemsFewer than 3 organizations account for most commits (not multi-vendor).
AI-assisted1,142 of 3,69655.33BRated

Integrity

Snapshot
2026-10-17
Raw hash
20b6f47029dc26f9f991b129c3c69eb46670b3b77780897d3776d379d80e9ac4

No suspicion flags on this repository.

The full record is in data/2026-10-17/repos/e1.json, under the key mobxjs/mobx.

How every number is measured: Porchlamp methodology.

Open an issue about this record and say what looks wrong.

Porchlamp (2026). mobxjs/mobx. Snapshot 2026-10-17. https://porchlamp.org/projects/mobxjs/mobx/. CC BY 4.0.

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