Comparison
Spec For Codex vs Cmux
Cmux has more GitHub stars (28,190 vs 66). Cmux was updated more recently (last commit 2h ago). Data comes straight from GitHub and refreshes daily.
Spec For Codex
VS Code extension for spec-driven development with Codex CLI. Manage specs, steering docs, and prompts visually, tightly integrated with Codex.
$
git clone https://github.com/atman-33/spec-for-codex
Cmux
Open source Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents. Built for multitasking, organization, and programmability.
$
brew install --cask cmux| Metric | Spec For Codex | Cmux |
|---|---|---|
| Type | Plugin | Plugin |
| GitHub stars | 66 | 28,190 |
| Stars, last 7 days | n/a | n/a |
| Forks | 11 | 2,508 |
| Upvotes | 0 | 0 |
| Language | TypeScript | Swift |
| License | MIT | n/a |
| Last commit | 1mo ago | 2h ago |
| Created | Sep 2025 | Jan 2026 |
| Categories | Dev tools, Productivity, Docs & writing | Dev tools, AI & LLM tooling, Mobile & desktop |