cl-digraph is an implementation of a mutable directed graph data structure for Common Lisp.

• License: MIT
• Documentation: https://docs.stevelosh.com/cl-digraph/
• Mercurial: https://hg.stevelosh.com/cl-digraph/
• Git: https://github.com/sjl/cl-digraph/

cl-digraph focuses on simplicity, correctness, and usability. Performance is not terrible, but is not a high priority.

It is currently not thread-safe, but this may happen in the future.

The test suite currently passes in SBCL, CCL, ECL, and ABCL on OS X and Debian. Further testing is welcome.