codecrafters-io/build-your-own-x
Master programming by recreating your favorite technologies from scratch.
553.1k stars · 51.9k forks · Markdown
This repo isn't software code, so code checks are limited.
Caution
Caution: no license file.
Why
- GitHub found no license file, so the content is not clearly licensed for reuse. (source 1)
What would change this
- A license file is added.
Maintenance
CompleteSlowing
- Human commits, 30 days
- 0
- Human commits, 90 days
- 0
- Human commits, 365 days
- 19
- Bot share of commits, 365 days
- 0%
- Last commit
- Jul 14, 2026 (3 months ago)
- Last human commit
- Jul 14, 2026 (3 months ago)
- Authors, 90 days
- 0
- Last release
- none found
- Median PR merge time
- 38 hours
Responsiveness: of 29 recent issues, 0% got a maintainer reply. Median first response: n/a.
Sources: Commits, Releases, Merged pull requests, Issues
People
Complete- Owner
- Organization
- Commits sampled
- 19 since Oct 14, 2025
- Authors for half of commits
- 1
- Authors for 80% of commits
- 4
- Contributors
- 131
Top committers
- sarupbanskota: 53% of commits
- rohitpaulk: 16% of commits
- root: 11% of commits
- ARJ544: 5% of commits
- Roi Amiel: 5% of commits
Sources: Commits, Contributors
Stars
CompleteOrganic, confidence high
Bursts
- Aug 25, 2018 to Aug 28, 2018: about 543 more stars than usual, peak 259 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 18, 2018 to Nov 21, 2018: about 366 more stars than usual, peak 137 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Dec 20, 2018 to Dec 21, 2018: about 85 more stars than usual, peak 69 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Mar 14, 2019 to Mar 15, 2019: about 119 more stars than usual, peak 98 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Sep 2, 2019 to Sep 2, 2019: about 93 more stars than usual, peak 110 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Sep 13, 2019 to Sep 22, 2019: about 869 more stars than usual, peak 230 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Oct 14, 2019 to Oct 17, 2019: about 386 more stars than usual, peak 159 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 2, 2019 to Nov 13, 2019: about 5k more stars than usual, peak 1.9k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Dec 8, 2019 to Dec 8, 2019: about 126 more stars than usual, peak 161 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Apr 1, 2020 to Apr 27, 2020: about 6.7k more stars than usual, peak 974 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Apr 28, 2020 to Apr 28, 2020: about 97 more stars than usual, peak 198 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- May 25, 2020 to Jun 2, 2020: about 1.8k more stars than usual, peak 882 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Aug 9, 2020 to Aug 11, 2020: about 572 more stars than usual, peak 247 in one day, a flat block of stars. Outside explanation: a jump in issues and pull requests.
- Sep 2, 2020 to Sep 10, 2020: about 968 more stars than usual, peak 240 in one day, a shape we can't classify. No outside explanation found, so this burst is unexplained.
- Sep 20, 2020 to Sep 21, 2020: about 206 more stars than usual, peak 196 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Oct 26, 2020 to Nov 12, 2020: about 2.2k more stars than usual, peak 1k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Dec 13, 2020 to Dec 21, 2020: about 1.6k more stars than usual, peak 367 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Jan 1, 2021 to Jan 5, 2021: about 428 more stars than usual, peak 218 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Jan 30, 2021 to Feb 7, 2021: about 3k more stars than usual, peak 779 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Apr 23, 2021 to May 7, 2021: about 2.5k more stars than usual, peak 658 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Jun 8, 2021 to Jun 13, 2021: about 836 more stars than usual, peak 295 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jul 7, 2021 to Jul 12, 2021: about 846 more stars than usual, peak 307 in one day, a shape we can't classify. No outside explanation found, so this burst is unexplained.
- Aug 10, 2021 to Aug 20, 2021: about 1.1k more stars than usual, peak 235 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Sep 23, 2021 to Sep 24, 2021: about 203 more stars than usual, peak 232 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Oct 1, 2021 to Oct 1, 2021: about 173 more stars than usual, peak 235 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 26, 2021 to Dec 14, 2021: about 2.2k more stars than usual, peak 343 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Feb 6, 2022 to Feb 11, 2022: about 891 more stars than usual, peak 306 in one day, a spike that tapers off. No outside explanation found, so this burst is unexplained.
- Feb 20, 2022 to Feb 25, 2022: about 1.9k more stars than usual, peak 544 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Apr 11, 2022 to Apr 19, 2022: about 879 more stars than usual, peak 280 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- May 21, 2022 to May 23, 2022: about 354 more stars than usual, peak 245 in one day, a spike that tapers off. We couldn't check for an outside explanation.
- Jun 2, 2022 to Jun 5, 2022: about 557 more stars than usual, peak 370 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jun 17, 2022 to Jun 21, 2022: about 817 more stars than usual, peak 446 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 10, 2022 to Nov 12, 2022: about 281 more stars than usual, peak 220 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 16, 2022 to Dec 2, 2022: about 2.2k more stars than usual, peak 450 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Jun 19, 2023 to Jun 28, 2023: about 1.1k more stars than usual, peak 282 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jul 25, 2023 to Jul 30, 2023: about 730 more stars than usual, peak 320 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Aug 14, 2023 to Aug 18, 2023: about 720 more stars than usual, peak 350 in one day, a shape we can't classify. We couldn't check for an outside explanation.
- Sep 2, 2023 to Sep 7, 2023: about 1.1k more stars than usual, peak 361 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Oct 1, 2023 to Oct 10, 2023: about 1.6k more stars than usual, peak 374 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Oct 19, 2023 to Oct 26, 2023: about 1k more stars than usual, peak 359 in one day, a spike that tapers off. Outside explanation: a Hacker News post, a jump in issues and pull requests.
- Nov 7, 2023 to Nov 15, 2023: about 1.2k more stars than usual, peak 357 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Nov 25, 2023 to Dec 3, 2023: about 1.9k more stars than usual, peak 1.1k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Mar 31, 2024 to Apr 8, 2024: about 1.8k more stars than usual, peak 570 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- May 7, 2024 to May 9, 2024: about 462 more stars than usual, peak 407 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jun 26, 2024 to Jun 27, 2024: about 777 more stars than usual, peak 889 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 15, 2024 to Nov 20, 2024: about 3.5k more stars than usual, peak 1.7k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Dec 31, 2024 to Jan 10, 2025: about 3.5k more stars than usual, peak 745 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Jan 20, 2025 to Jan 23, 2025: about 929 more stars than usual, peak 465 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Feb 10, 2025 to Mar 18, 2025: about 22.8k more stars than usual, peak 1.3k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Apr 27, 2025 to Apr 29, 2025: about 886 more stars than usual, peak 850 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jun 4, 2025 to Jun 10, 2025: about 1k more stars than usual, peak 542 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jun 24, 2025 to Jul 2, 2025: about 2.6k more stars than usual, peak 811 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Nov 5, 2025 to Nov 11, 2025: about 1.4k more stars than usual, peak 905 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Jan 14, 2026 to Jan 29, 2026: about 2.1k more stars than usual, peak 553 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Mar 2, 2026 to Mar 6, 2026: about 1.3k more stars than usual, peak 956 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Mar 15, 2026 to Mar 21, 2026: about 5k more stars than usual, peak 2.2k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Apr 24, 2026 to Apr 27, 2026: about 2.3k more stars than usual, peak 1.3k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- May 27, 2026 to Jun 9, 2026: about 5.6k more stars than usual, peak 1.2k in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
- Jul 16, 2026 to Jul 23, 2026: about 3k more stars than usual, peak 1.1k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- Aug 1, 2026 to Aug 7, 2026: about 2k more stars than usual, peak 1k in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
- 48 stars GitHub has since removed (tracked since Oct 13, 2026).
Anyone can buy stars for any repo; bursts alone don't prove the owner did.
- The star history looks organic.
- Engagement is not compared for non-code or mirror repositories.
Sources: How star history is analyzed
Risk
CompleteFlags
- Warning: GitHub finds no license for this repository, so default copyright rules apply and no reuse is granted. Details
License
- Now
- No license found
- A year ago
- Not known
Packages
No published packages found.
Badge
Add this to a README to show the current verdict:
[](https://reporadar.ai/codecrafters-io/build-your-own-x)Earlier verdicts
- Oct 14, 2026: Caution
- Oct 13, 2026: Caution
- Oct 13, 2026: Caution
Computed 20 hours ago · method 2026.10.2