Which has better activity and maintenance signals?

Based on the RepoPilot analysis provided:

gaoxiang12/slambook has a stale maintenance signal: the verdict shows "WAIT — Stale — last commit 2y ago," indicating no recent activity for 2 years.

The README itself confirms this project's legacy status. It states:

"Slambook 2 has be released since 2019.8 which has better support on Ubuntu 18.04 and has a lot of new features. Slambook 1 will still be available on github but I suggest new readers switch to the second version."

[gaoxiang12/slambook] README.md (lines 1-4]

This means gaoxiang12/slambook is effectively deprecated in favor of slambook2.

light-city/cplusplusthings has no RepoPilot verdict provided in the data, so I cannot make a direct comparison based on automated signals. However, without explicit staleness signals, it cannot be assumed to have the same maintenance issues as slambook.

Recommendation: If you need an actively maintained SLAM implementation, the repository itself directs you to slambook2. If you're studying the educational material from the 2017 book, gaoxiang12/slambook is still usable but should be understood as archival content.

FOLLOW_UPS:

• What are slambook2's key improvements over slambook?
• Does cplusplusthings have recent commit history?
• Are there known issues reported in slambook?