Cognitive Complexity vs other "Code Complexity"

[BradKML]

Something that really itched me in Claude Code is that old_string mismatch is an issue once a codebase is too "spaghatti", and thre needs to be an automated process to refactor whenever appropriate, such that the agent won't blow stuff up by accident. Maybe a complexity MCP could help? I am not sure. Saw this before tho https://github.com/hyperb1iss/lucidity-mcp

For the modern Cognitive Complexity:

• Fast Python complexity check https://github.com/rohaquinlop/complexipy
• Golang has some https://github.com/uudashr/gocognit https://github.com/nrnrk/gocognito
• Typescript got visuals https://github.com/Deskbot/Cognitive-Complexity-TS https://github.com/geneseframework/complexity
• Rust has some too https://github.com/rossmacarthur/complexity
• In case of universal complexity checking (sadly in Emacs) https://github.com/emacs-vs/codemetrics https://github.com/emacs-vs/cognitive-complexity

There are also other old-school metrics here, including famous ones like "Cyclometric Complexity" boyter/scc#235 (comment)

[BradKML]

Addendum: "refactor tool" MCPs do exist for Claude Code, suggesting that the current agent tooling in CC is somewhat broken, which is a bit concerning https://github.com/myuon/refactor-mcp https://github.com/johannhartmann/mcpcodeanalysis

This also goes under "navigate" or "search" or "index", here is an example https://github.com/fluffypony/mcp-code-indexer

[BradKML]

Some classical complexity libraries https://github.com/boyter/scc rohaquinlop/complexipy#77 (comment) boyter/scc#235 (comment) https://github.com/mxmssh/IDAmetrics https://github.com/philbooth/escomplex

[BradKML]

Other ideas:

• If we were to deal with code quality we can check https://github.com/hyperb1iss/lucidity-mcp
• As for "sanity check" we can use the following https://github.com/PV-Bhat/vibe-check-mcp-server