Evidaxis
Dated record

qpdf

repo · qpdf/qpdf · paper: not linked · as of

Niche: not yet assigned.

3.8 commits per week averaged over the trailing window. No paper is linked in OpenAlex. Dependents: no reading in the scored panel. 1 of 4 weekly observations; full commit series captured. 5,444 GitHub stars, recorded, not scored. Measured 2026-09-26 for qpdf; sources linked below.

commits/wk 3.8 averaged, trailing window last commit week 2026-09-20 measured · GitHub ·
citations no paper linked all years, indexed to date no reading · OpenAlex ·
direct dependents not in the scored panel partition 2026-09-26 no reading · deps.dev snapshot ·
stars 5,444 recorded, not scored measured · GitHub ·
Download values (CSV) JSON record Follow this system (feed) Report an error

Is qpdf still maintained?

3.8 commits per week averaged over the trailing window.

GitHub averaged 3.8 per week over the trailing window; raw weekly counts below are individual weeks.

Last commit week 2026-09-20.

Commits in the latest captured week vs 4 weeks earlier: -1 · vs 26 weeks earlier: -2 · 52-week range: 0 to 42 commits in an individual week.

line chart: qpdf, weekly commits, 2 in latest week, 2025-09-28 to 2026-09-20
qpdf averaged 3.8 commits a week. GitHub commit_activity · .
Latest eight weeks
Week startingCommits
2026-08-020
2026-08-0911
2026-08-167
2026-08-233
2026-08-3020
2026-09-061
2026-09-130
2026-09-202
heatmap chart: qpdf, weeks with commits, 18 of 26, 2026-03-29 to 2026-09-20
18 of the last 26 captured weeks had commits for qpdf. GitHub commit_activity · .
All 52 weeks
Weekly commits
Week startingCommits
2025-09-2820
2025-10-0542
2025-10-1226
2025-10-195
2025-10-2614
2025-11-0222
2025-11-0919
2025-11-1612
2025-11-2311
2025-11-3033
2025-12-078
2025-12-142
2025-12-214
2025-12-282
2026-01-044
2026-01-118
2026-01-1810
2026-01-250
2026-02-013
2026-02-080
2026-02-150
2026-02-221
2026-03-011
2026-03-082
2026-03-151
2026-03-224
2026-03-291
2026-04-054
2026-04-126
2026-04-193
2026-04-262
2026-05-038
2026-05-106
2026-05-170
2026-05-241
2026-05-311
2026-06-078
2026-06-141
2026-06-210
2026-06-280
2026-07-051
2026-07-120
2026-07-190
2026-07-260
2026-08-020
2026-08-0911
2026-08-167
2026-08-233
2026-08-3020
2026-09-061
2026-09-130
2026-09-202

GitHub commit_activity · period 2025-09-28 to 2026-09-20 · n = 52 weeks · method weekly totals; reconstructed dates · updated · version 9d2fe956adbc-b1 · CSV

Readings

Recorded values and sources
ReadingValueΔ 4 weeksΔ 26 weeks52-week rangeInstrumentDateReproducePrevious reading
Commits per week3.81.211 to 17.8GitHub, trailing 12 weeks2026-09-26Public queryno reading
Citing worksno readingno readingno readingno readingOpenAlex, all years2026-09-26Public queryno reading
Direct dependentsno readingno readingno readingno readingDirect dependents2026-09-26Public queryno reading
Daily dependents (unscored)no readingno readingno readingno readingdeps.dev REST, unscored2026-09-26Public queryno reading
Stars5,444no readingno reading5,444 to 5,444GitHub stars, unscored2026-09-26Public queryno reading

Evidaxis snapshot · period 2026-09-26 · n = 1 system · method source linked readings · updated · version 9d2fe956adbc-b1

How to cite qpdf's record?

Evidaxis. qpdf measurement record. Snapshot 2026-09-26. urn:evidaxis:claim:e_STXHNEWBVW2:m3:2026-09-26. CC0-1.0. https://evidaxis.org/e/e_STXHNEWBVW2/

Evidaxis · period 2026-09-26 · n = 1 system · method claim URN · updated · version 9d2fe956adbc-b1

What changed since the last snapshot?

No previous snapshot reading is available for this system.

slope chart: qpdf, measured values, 2, 2026-09-26
First observation 2026-09-26 for qpdf; 2 measured values. Evidaxis snapshots · .
Snapshot values
MetricPreviousCurrentDelta
Commits per weekno reading3.8no reading
Citing worksno readingno readingno reading
Direct dependentsno readingno readingno reading
Starsno reading5,444no reading

Evidaxis snapshots · period 2026-09-26 to 2026-09-26 · n = 1 partition · method paired snapshot values · updated · version 9d2fe956adbc-b1 · History CSV

Take the data or follow changes

Values and captured history are available under CC0-1.0. The system feed records changes to published numbers.

Values CSVHistory CSVJSON recordAtom feedJSON FeedAdd Evidaxis as a preferred source on GoogleReport an error

Evidaxis · period 2026-09-26 · n = 1 system · method CC0-1.0 open export · updated · version 9d2fe956adbc-b1

For teams tracking many systems

Use the cohort CSV, snapshot archive and membership manifest to reproduce observations across systems.

Cohort CSV · Snapshot archive · Membership manifest

Paper and links

Source records identify the system, repository and linked works; no paper authors are published.

What is not measured for qpdf, and why

Missing readings describe instrument coverage. A missing value is not a measured zero.

Unmeasured slots
ReadingReason
Citing worksnot linked
Direct dependentsoutside panel
Daily dependents (unscored)no reading captured

Dependents: no reading in the scored panel.

Gate ETA: never published; Evidaxis makes no public actionable prediction.

Dependents ecosystem composition: no reading; this field is not present in the snapshot.

Evidaxis · period 2026-09-26 · n = 1 system · method measurement coverage · updated · version 9d2fe956adbc-b1

Measurement detail

Gate, gauges, percentile, derived signals and snapshot receipt

History: 1 of 4 weekly observations. Axis coverage: 1 of 3 axes measurable. Gate: not computable - history 1 of 4 weekly observations

1 of 4 weekly observations; full commit series captured.

qpdf

repo
Unassigned (AI-v1 census) · n = 5778 · qpdf/qpdf
1 of 3 axes measurable · conf low
convergence gate
Convergence gate: Gate: not computable - history 1 of 4 weekly observations Development velocity: measured × Citation momentum: not measurable ∅ Direct-dependents momentum (deps.dev): not measurable ∅
gate
0 of 3 axes

Gate: not computable - history 1 of 4 weekly observations

· Evidaxis snapshot · 2026-09-26
Gate: not computable - history 1 of 4 weekly observations
position in cohort distribution one of 5778 in cohort
percentile 23 within cohort p25 p50 p75 p0 p100
percentile
p23
· Evidaxis snapshot · 2026-09-26
momentum averages present-axis z-scores; two- and three-axis scores are not strictly comparable
velocity z
velocity z gaugevelocity z-1.06 within cohort, log-slope -0.011/wk.0-1.06
velocity z
-1.06 σ
slope
-0.011/wk
· Evidaxis snapshot · 2026-09-26
log-slope -0.011/wk
citation z Citation source: not measured.
direct-dependents z Direct-dependents axis: outside the frozen panel; not measured.
cohort
5778
systems measured
weekly commits
3.8
Development velocity axis: measured.
total citations
no reading
Citation source: not measured.
momentum
36.8
percentile p23
commit heatmap, last 26 weeks3.8/wk
weekly commits, 26 weeks26 weeks of commits, peak 20 in a week, 18 active weeks, 86 total.week 1: 1 commitsweek 2: 4 commitsweek 3: 6 commitsweek 4: 3 commitsweek 5: 2 commitsweek 6: 8 commitsweek 7: 6 commitsweek 8: 0 commitsweek 9: 1 commitsweek 10: 1 commitsweek 11: 8 commitsweek 12: 1 commitsweek 13: 0 commitsweek 14: 0 commitsweek 15: 1 commitsweek 16: 0 commitsweek 17: 0 commitsweek 18: 0 commitsweek 19: 0 commitsweek 20: 11 commitsweek 21: 7 commitsweek 22: 3 commitsweek 23: 20 commitsweek 24: 1 commitsweek 25: 0 commitsweek 26: 2 commits
weeks
26
peak/wk
20
active
18
total
86
· Evidaxis snapshot · 2026-09-26
citations by yearCitation source: not measured.
recency-weighted swing trailing 13-week vs prior 39-week log-slope ratio -1.84, regime recent slope sign differs from prior window. prior slope -0.059, recent slope +0.109 per week. -0.059prior 39w+0.109recent 13w-1.84×
swing
-1.84×
regime
recent slope sign differs from prior window
windows
13w vs 39w
snapshot 1 of 1 · · m3
commit-axis Sharpe log-linear slope over residual std, value -0.042 with 95% CI -0.070 to -0.014, 50 degrees of freedom. CI spans zero.0-0.04295% CI -0.070, -0.014-0.070-0.014
sharpe
-0.042
95% ci
-0.070, -0.014
dof
50
snapshot 1 of 1 · · m3
commit changepoint52 weekly commit points. No significant changepoint detected (|delta slope| within the noise floor).no significant changepoint
changepoint
none detected
snapshot 1 of 1 · · m3
code-leads-citation lag reserved

reserved: citation series too short / axis absent for cross-correlation

status
reserved
value
insufficient data
snapshot 1 of 1 · · m3
axis alpha vs cohort reserved

reserved: cohort N too small for regression (power ~0)

status
reserved
value
insufficient data
snapshot 1 of 1 · · m3
methodology gate snapshot 1 of 1 · · m3
commit weeks
52
citation years
0
shipped
3
reserved
3

shipped

  • recency-swing
  • commit-sharpe
  • commit-changepoint

reserved

  • code-leads-citation-lag
  • axis-alpha
  • gate-eta
snapshot 1 of 1 · · m3

Direct-dependents momentum (deps.dev)

Direct-dependents axis: outside the frozen panel; not measured.

Coverage state
out_of_panel
Cohort z
no axis
OLS slope
no reading
Theil-Sen slope
no reading
Latest direct dependents
no reading
Confirmed-clean points
no reading
Reconstructed history points
no reading
As-of partition
no reading
Fragility veto
no reading
Rising vote
no

Source: deps.dev (Google), CC-BY 4.0. Modified: aggregated to system-level counts and momentum scores.

Axis definition · Snapshot axis correlations

Evidaxis · period 2026-09-26 · n = 1 system · method measurement detail · updated · version 9d2fe956adbc-b1 · record JSON · snapshot receipt