babysor/mockingbird vs ebookfoundation/free-programming-books
Both showing Mixed signals — pick on fit, not health
As of June 2026, mockingbird and free-programming-books both show mixed maintenance signals. mockingbird last saw a commit 3 months ago with 24+ active contributors, while free-programming-books was committed to 3 days ago with 79+ active contributors. mockingbird is Other-licensed while free-programming-books is CC-BY-4.0-licensed. Neither has known critical or high-severity CVEs in its dependency tree.
Informational only. RepoPilot summarises public signals at the time of analysis. Not professional, security, or legal advice.
babysor/mockingbird →
Mixed signals — read the receipts
non-standard license (Other); no tests detected…
Has a license, tests, and CI — clean foundation to fork and modify.
Documented and popular — useful reference codebase to read through.
No critical CVEs, sane security posture — runnable as-is.
- ⚠Concentrated ownership — top contributor handles 61% of recent commits
- ⚠Non-standard license (Other) — review terms
- ⚠No CI workflows detected
- ⚠No test directory detected
- ✓Last commit 2mo ago
- ✓24+ active contributors
- ✓Other licensed
What would improve this?
- →Use as dependency Concerns → Mixed if: clarify license terms
Maintenance signals: commit recency, contributor breadth, bus factor, license, CI, tests
ebookfoundation/free-programming-books →
Mixed signals — read the receipts
non-standard license (CC-BY-4.0); no tests detected
Has a license, tests, and CI — clean foundation to fork and modify.
Documented and popular — useful reference codebase to read through.
No critical CVEs, sane security posture — runnable as-is.
- ⚠Non-standard license (CC-BY-4.0) — review terms
- ⚠No test directory detected
- ⚠Scorecard: default branch unprotected (0/10)
- ✓Last commit 1d ago
- ✓79+ active contributors
- ✓Distributed ownership (top contributor 7% of recent commits)
- ✓CC-BY-4.0 licensed
- ✓CI configured
What would improve this?
- →Use as dependency Concerns → Mixed if: clarify license terms
Maintenance signals: commit recency, contributor breadth, bus factor, license, CI, tests + OpenSSF Scorecard
Signal-by-signal breakdown
| mockingbird | free-programming-books | |
|---|---|---|
| Stars | 36,897 | 390,434 |
| Last commit | 3mo ago | 3d ago |
| License | Other | CC-BY-4.0 |
| Open issues | 482 | 79 |
| Has tests | — | — |
| Has CI | — | ✓ |
| Test coverage | 0% | 0% |
| Dependency CVEs | No CVEs | No CVEs |
| Architecture grade | — | C |
| Cycles | — | 0 |
| Bottom-line | Mixed signals | Mixed signals |
Want the full analysis? babysor/mockingbird · ebookfoundation/free-programming-books
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