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kovidgoyal/calibre

Star momentum, maintenance concentration, contributor health, and codebase change — one report built from public repository data.

Open on GitHub
Current stars
25,906
Activity since
2013
Latest activity
Sep 2026

Public star activity

Last 30 days
+26
Last 90 days
+38
Actions / day
5.0
Public star actions
stars from May 29, 2013 to September 15, 2026, peaking at 24,328.24k STARS13 YR 4 MO24kSEP 2026MAY 2013

24,328 stars on September 15, 2026.

stars by date
Datestars
May 29, 20131
June 22, 201350
July 6, 201366
August 5, 2013105
September 4, 2013153
September 21, 2013175
October 22, 2013214
November 15, 2013249
December 3, 2013265
December 31, 2013310
January 28, 2014358
February 14, 2014380
March 12, 2014432
April 6, 2014476
April 19, 2014496
May 16, 2014542
June 13, 2014584
June 30, 2014601
August 4, 2014635
September 1, 2014708
September 14, 2014738
October 14, 2014781
November 7, 2014822
November 18, 2014845
December 17, 2014883
January 12, 2015934
January 26, 2015962
February 21, 20151,010
March 19, 20151,076
March 30, 20151,100
April 22, 20151,163
May 16, 20151,214
May 29, 20151,240
June 23, 20151,305
July 18, 20151,362
July 31, 20151,387
August 27, 20151,446
September 22, 20151,497
October 4, 20151,520
October 29, 20151,575
November 22, 20151,631
December 4, 20151,675
December 29, 20151,731
January 23, 20161,801
February 4, 20161,835
February 29, 20161,897
March 22, 20161,970
April 4, 20162,001
April 29, 20162,053
May 25, 20162,116
June 8, 20162,145
July 2, 20162,203
July 26, 20162,252
August 7, 20162,284
August 31, 20162,347
September 22, 20162,415
October 10, 20162,449
November 3, 20162,536
November 26, 20162,618
December 7, 20162,647
December 30, 20162,715
January 23, 20172,796
February 14, 20172,863
February 27, 20172,897
March 22, 20172,975
April 14, 20173,045
April 25, 20173,082
May 17, 20173,145
June 12, 20173,213
June 23, 20173,318
July 16, 20173,443
August 7, 20173,529
August 19, 20173,559
September 14, 20173,640
October 9, 20173,712
October 20, 20173,751
November 11, 20173,912
December 4, 20173,995
December 15, 20174,038
January 7, 20184,136
January 31, 20184,241
February 12, 20184,284
March 8, 20184,361
March 31, 20184,440
April 14, 20184,471
May 6, 20184,555
June 1, 20184,632
June 13, 20184,679
July 5, 20184,756
July 31, 20184,833
August 11, 20184,867
September 3, 20184,961
September 26, 20185,048
October 8, 20185,089
October 30, 20185,167
November 23, 20185,284
December 4, 20185,340
December 26, 20185,446
January 18, 20195,566
January 29, 20195,613
February 21, 20195,703
March 15, 20195,836
March 26, 20195,895
April 18, 20196,005
May 11, 20196,138
May 23, 20196,189
June 15, 20196,293
July 9, 20196,391
July 20, 20196,453
August 11, 20196,554
September 3, 20196,652
September 15, 20196,704
October 8, 20196,866
October 30, 20197,015
November 11, 20197,088
December 3, 20197,229
December 26, 20197,345
January 6, 20207,425
January 28, 20207,549
February 20, 20207,696
March 2, 20207,761
March 25, 20207,900
April 16, 20208,045
April 27, 20208,145
May 20, 20208,324
June 11, 20208,444
June 23, 20208,513
July 15, 20208,634
August 7, 20208,765
August 18, 20208,837
September 11, 20208,940
October 3, 20209,129
October 14, 20209,232
November 6, 20209,405
November 28, 20209,555
December 10, 20209,629
January 1, 20219,780
January 24, 20219,964
February 4, 202110,031
February 26, 202110,170
March 22, 202110,317
April 2, 202110,390
April 25, 202110,551
May 20, 202110,705
May 31, 202110,782
June 23, 202110,936
July 15, 202111,110
July 27, 202111,176
August 18, 202111,325
September 13, 202111,476
September 25, 202111,549
October 19, 202111,662
November 18, 202111,790
November 29, 202111,875
December 22, 202112,074
January 13, 202212,295
January 25, 202212,394
February 16, 202212,539
March 11, 202212,705
March 22, 202212,760
April 13, 202212,891
May 6, 202213,050
May 17, 202213,139
June 9, 202213,303
July 1, 202213,549
July 12, 202213,643
August 4, 202213,845
August 27, 202214,027
September 7, 202214,108
September 29, 202214,274
October 22, 202214,422
November 2, 202214,489
November 25, 202214,654
December 17, 202214,919
December 28, 202215,032
January 20, 202315,216
February 11, 202315,388
February 23, 202315,499
March 17, 202315,665
April 9, 202315,848
May 1, 202315,994
May 12, 202316,074
June 4, 202316,231
June 26, 202316,374
July 8, 202316,460
July 30, 202316,638
August 22, 202316,821
September 2, 202317,213
September 25, 202317,475
October 17, 202317,652
October 28, 202317,730
November 20, 202318,200
December 12, 202318,420
December 24, 202318,505
January 15, 202418,703
February 7, 202418,901
February 18, 202418,983
March 11, 202419,194
April 3, 202419,386
April 14, 202419,471
May 7, 202419,636
May 29, 202419,810
June 9, 202419,897
July 2, 202420,069
July 25, 202420,234
August 5, 202420,326
August 27, 202420,495
September 19, 202420,679
September 30, 202420,776
October 23, 202420,981
November 14, 202421,161
November 25, 202421,259
December 18, 202421,445
January 9, 202521,664
January 21, 202521,772
February 12, 202521,950
March 7, 202522,164
March 18, 202522,240
April 9, 202522,485
May 2, 202522,688
May 13, 202522,785
June 5, 202522,898
June 27, 202523,012
July 9, 202523,087
July 31, 202523,243
August 24, 202523,331
September 4, 202523,383
September 26, 202523,462
October 26, 202523,559
November 7, 202523,598
November 30, 202523,679
December 22, 202523,760
January 2, 202623,815
January 25, 202623,910
February 17, 202624,132
March 2, 202624,176
March 30, 202624,220
May 2, 202624,269
May 28, 202624,290
September 15, 202624,328

The last 90 days run behind its lifetime average, which is ordinary for a mature project.

Observed activity milestones: 100 around Aug 20131k around Feb 201510k around Feb 2021

The commit history reads kovidgoyal/calibre a second time

methodology

Fix-labelled changes, file change frequency, ownership concentration and maintenance cadence, each computed from this repository's analyzed commit window. None of them is derived from stars, which is why they are allowed to disagree with the curve above.

Fix-labelled changes
Fix-labelled changes for kovidgoyal/calibre
File change frequency
File change frequency for kovidgoyal/calibre
Bus factor
Bus factor for kovidgoyal/calibre
Maintenance pulse
Maintenance pulse for kovidgoyal/calibre
Contributors
Contributors for kovidgoyal/calibre
Language activity
Language activity for kovidgoyal/calibre
Commit activity
Commit activity for kovidgoyal/calibre
Recent TODO/FIXME movement
Recent TODO/FIXME movement for kovidgoyal/calibre

Attention is not adoption.

Stars against usage

No published package was detected for this repository, so there is nothing to lay over star growth.

Earned badges

badge studio

Maintenance, ownership and star-momentum signals, computed from the same commit and star history and embeddable as static images.

Reading badge evidence for kovidgoyal/calibre.

Notes on kovidgoyal/calibre

How many stars does kovidgoyal/calibre have?
GitHub currently reports 25,906 stars for kovidgoyal/calibre. The chart itself is rebuilt from historical star data, which records star actions and not unstars, so it reads as an attention signal rather than a net star count.
What does recent star activity look like for calibre?
gitdebt observed about 38 public star actions for kovidgoyal/calibre over the latest 90 days of archive coverage (about 26 in the latest 30). This is an approximate attention signal, not a net-star count, because unstars are not present. That's below its lifetime average activity pace, which is common for mature projects.
Is calibre still active?
Public archive data shows about 26 star actions for kovidgoyal/calibre in the latest 30 days of coverage. For repository activity, use the commit heatmap, commit trend, and contributor charts on this page.
When was calibre created?
kovidgoyal/calibre was created on May 28, 2013. The first public star activity observed for kovidgoyal/calibre is from May 2013.

Read calibre against a neighbour

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Put this drawing in your README

markdown for agents

The block below publishes the chart with its source and coverage date stated beside it — the same three facts the title block above shows, as text a reader can check. The prompt underneath hands a coding agent the badges and repo-health charts as well.

README.md · kovidgoyal/calibre star history
<a href="https://gitdebt.com/kovidgoyal/calibre?ref=readme">
  <picture>
    <source media="(prefers-color-scheme: dark)" srcset="https://api.gitdebt.com/api/repos/kovidgoyal/calibre/chart.svg?theme=dark" />
    <img alt="kovidgoyal/calibre star history" src="https://api.gitdebt.com/api/repos/kovidgoyal/calibre/chart.svg?theme=light" />
  </picture>
</a>

<sub>Star history source: Historical star data · Covers through September 15, 2026 · Still updating — <a href="https://gitdebt.com/kovidgoyal/calibre?ref=readme">gitdebt</a></sub>

Light and dark variants, alt text, and one provenance line. Provenance is text in your README, never baked into the image URL, so the chart stays cacheable.

Paste it into Claude Code, Cursor, Codex, or any coding agent with your checkout open. It carries the measured numbers, the exact snippets, and the rules — including replacing an existing star-history widget in place rather than stacking a second chart under it.