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facebook/zstd

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

Open on GitHub
Current stars
27,867
Activity since
2015
Latest activity
Sep 2026

Public star activity

Last 30 days
+32
Last 90 days
+32
Actions / day
6.4
Public star actions
stars from January 24, 2015 to September 15, 2026, peaking at 27,069.27k STARS11 YR 8 MO27kSEP 2026JAN 2015

27,069 stars on September 15, 2026.

stars by date
Datestars
January 24, 201569
February 13, 2015483
February 26, 2015506
April 1, 2015537
May 12, 2015569
May 26, 2015585
July 20, 2015610
September 9, 2015636
October 5, 2015656
November 16, 2015697
December 21, 2015746
January 16, 2016759
February 14, 2016824
March 22, 2016857
April 6, 2016871
May 3, 2016942
May 30, 2016978
June 12, 2016988
July 6, 20161,127
July 31, 20161,206
August 16, 20161,226
September 7, 20163,808
September 26, 20164,293
October 5, 20164,401
October 24, 20164,521
November 12, 20164,585
November 22, 20164,610
December 13, 20164,669
January 2, 20174,756
January 12, 20174,802
January 31, 20174,898
February 18, 20174,985
February 28, 20175,018
March 19, 20175,153
April 8, 20175,215
April 18, 20175,239
May 8, 20175,317
May 28, 20175,390
June 7, 20175,419
June 27, 20175,483
July 18, 20175,571
July 29, 20175,602
August 17, 20175,655
September 7, 20175,750
September 16, 20175,781
October 6, 20175,848
October 26, 20175,917
November 4, 20175,950
November 23, 20176,040
December 13, 20176,096
December 23, 20176,133
January 11, 20186,210
January 30, 20186,763
February 8, 20186,818
February 27, 20186,896
March 19, 20187,060
March 29, 20187,114
April 19, 20187,536
May 10, 20187,631
May 20, 20187,679
June 8, 20187,770
June 27, 20187,900
July 15, 20187,994
July 25, 20188,036
August 14, 20188,129
September 2, 20188,212
September 12, 20188,234
October 2, 20188,317
October 22, 20188,400
November 2, 20188,445
November 20, 20188,549
December 9, 20189,293
December 19, 20189,341
January 7, 20199,461
January 26, 20199,570
February 5, 20199,612
February 24, 20199,713
March 15, 20199,794
March 24, 20199,837
April 12, 20199,961
May 2, 201910,205
May 12, 201910,260
May 31, 201910,343
June 19, 201910,456
June 28, 201910,504
July 17, 201910,617
August 5, 201910,969
August 14, 201911,014
September 2, 201911,116
September 21, 201911,212
October 1, 201911,283
October 20, 201911,404
November 8, 201911,577
November 17, 201911,649
December 6, 201911,777
December 25, 201911,863
January 3, 202011,907
January 22, 202012,069
February 11, 202012,129
February 21, 202012,177
March 11, 202012,287
March 29, 202012,375
April 8, 202012,420
April 27, 202012,513
May 16, 202012,630
May 25, 202012,770
June 13, 202012,898
July 2, 202012,990
July 12, 202013,037
July 31, 202013,145
August 19, 202013,243
August 30, 202013,296
September 18, 202013,395
October 7, 202013,516
October 16, 202013,623
November 4, 202013,743
November 23, 202013,905
December 2, 202013,955
December 21, 202014,341
January 9, 202114,512
January 19, 202114,573
February 7, 202114,715
February 26, 202114,818
March 7, 202114,886
March 26, 202115,031
April 14, 202115,165
April 23, 202115,218
May 15, 202115,481
June 3, 202115,706
June 13, 202115,762
July 2, 202115,877
July 20, 202115,992
July 30, 202116,063
August 18, 202116,162
September 9, 202116,282
September 18, 202116,334
October 10, 202116,422
November 4, 202116,486
November 14, 202116,550
December 2, 202116,669
December 21, 202116,821
December 31, 202116,928
January 19, 202217,041
February 7, 202217,195
February 16, 202217,256
March 7, 202217,375
March 26, 202217,478
April 4, 202217,523
April 23, 202217,621
May 12, 202217,713
May 22, 202217,760
June 10, 202217,871
June 29, 202217,999
July 8, 202218,059
July 27, 202218,177
August 15, 202218,301
August 24, 202218,760
September 12, 202219,100
October 1, 202219,247
October 11, 202219,318
October 30, 202219,468
November 18, 202219,585
November 27, 202219,622
December 16, 202219,726
January 4, 202320,113
January 13, 202320,183
February 1, 202320,288
February 20, 202320,492
March 2, 202320,564
March 21, 202320,708
April 8, 202320,863
April 18, 202320,950
May 7, 202321,074
May 26, 202321,194
June 4, 202321,244
June 23, 202321,336
July 12, 202321,456
July 22, 202321,506
August 9, 202321,619
August 29, 202321,721
September 17, 202321,847
September 27, 202321,907
October 16, 202322,021
November 5, 202322,115
November 14, 202322,170
December 4, 202322,293
December 23, 202322,401
January 1, 202422,455
January 20, 202422,557
February 8, 202422,682
February 18, 202422,755
March 8, 202422,917
March 27, 202423,091
April 5, 202423,244
April 24, 202423,390
May 13, 202423,509
May 22, 202423,558
June 10, 202423,664
June 29, 202423,771
July 9, 202423,824
July 28, 202423,926
August 15, 202424,059
August 25, 202424,123
September 13, 202424,272
October 2, 202424,471
October 11, 202424,560
October 30, 202424,710
November 18, 202424,830
November 28, 202424,918
December 16, 202425,015
January 4, 202525,159
January 14, 202525,218
February 2, 202525,320
February 21, 202525,457
March 2, 202525,528
March 21, 202525,645
April 9, 202525,778
April 18, 202525,825
May 7, 202525,958
May 26, 202526,072
June 5, 202526,116
June 24, 202526,190
July 14, 202526,280
July 24, 202526,327
August 12, 202526,391
August 31, 202526,444
September 12, 202526,479
October 2, 202526,551
October 27, 202526,624
November 6, 202526,646
November 28, 202526,699
December 18, 202526,759
December 29, 202526,798
January 19, 202626,851
February 8, 202626,919
February 17, 202626,942
March 19, 202626,990
April 17, 202627,020
May 15, 202627,037
September 15, 202627,069

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

Observed activity milestones: 100 around Feb 20151k around Jun 201610k around Apr 2019

The commit history reads facebook/zstd 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 facebook/zstd
File change frequency
File change frequency for facebook/zstd
Bus factor
Bus factor for facebook/zstd
Maintenance pulse
Maintenance pulse for facebook/zstd
Contributors
Contributors for facebook/zstd
Language activity
Language activity for facebook/zstd
Commit activity
Commit activity for facebook/zstd
Recent TODO/FIXME movement
Recent TODO/FIXME movement for facebook/zstd

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 facebook/zstd.

Notes on facebook/zstd

How many stars does facebook/zstd have?
GitHub currently reports 27,867 stars for facebook/zstd. 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 zstd?
gitdebt observed about 32 public star actions for facebook/zstd over the latest 90 days of archive coverage (about 32 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 zstd still active?
Public archive data shows about 32 star actions for facebook/zstd in the latest 30 days of coverage. For repository activity, use the commit heatmap, commit trend, and contributor charts on this page.
When was zstd created?
facebook/zstd was created on January 24, 2015. The first public star activity observed for facebook/zstd is from Jan 2015.

Read zstd against a neighbour

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