openai/codex vs rust-lang/mdbook
Both showing Healthy signals — pick on fit, not health
As of September 2026, codex and mdbook both show healthy maintenance signals. codex was committed to today with 33+ active contributors, while mdbook was committed to 2 weeks ago with 19+ active contributors. codex is Apache-2.0-licensed while mdbook is MPL-2.0-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.
openai/codex
Healthy across all four use cases
No blocking maintenance, license, or known-CVE signals were found; still verify the package version and fit.
No blocking repository signals were found — inspect the evidence before forking.
Documented and popular — useful reference codebase to read through.
No blocking repository-level signals were found; deployment review is still required.
- ✓Last commit today
- ✓33+ active contributors
- ✓Distributed ownership (top contributor 30% of recent commits)
- ✓Apache-2.0 licensed
- ✓CI configured
- ✓Tests present
Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard
rust-lang/mdbook
Healthy across all four use cases
No blocking maintenance, license, or known-CVE signals were found; still verify the package version and fit.
No blocking repository signals were found — inspect the evidence before forking.
Documented and popular — useful reference codebase to read through.
No blocking repository-level signals were found; deployment review is still required.
- ✓Last commit today
- ✓19 active contributors
- ✓Distributed ownership (top contributor 36% of recent commits)
- ✓MPL-2.0 licensed
- ✓CI configured
- ✓Tests present
Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard
Signal-by-signal breakdown
| codex | mdbook | |
|---|---|---|
| Stars | 124,784 | 22,104 |
| Last commit | today | 19d ago |
| License | Apache-2.0 | MPL-2.0 |
| Open issues | 17,484 | 668 |
| Has tests | ✓ | ✓ |
| Has CI | ✓ | ✓ |
| Test coverage | 22% | 100% |
| Dependency CVEs | No CVEs | No CVEs |
| Architecture grade | A | — |
| Cycles | 0 | — |
| Bottom-line | Healthy signals | Healthy signals |
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