AI Plugin Indexspec_generator vs app-builder
spec_generator and app-builder are both ai and llm tools skills. app-builder scores higher (92 vs 91 out of 100). spec_generator has more GitHub stars (108k), and app-builder was updated more recently (today). The table compares them side by side.
| spec_generator | app-builder | |
|---|---|---|
| Score | 91 / 100 | 92 / 100 |
| What it does | Generates a structured Workable Spec JSON to guide a Developer Worker. | Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents. |
| Publisher | Community: google-gemini | Community: sickn33 |
| Grades | Maintenance A, Licence A, Quality A | Maintenance A, Licence A, Quality A |
| npm downloads a week | Not on npm | Not on npm |
| Runs | Skill | Skill |
| Works with | Claude Code, Claude apps | Claude Code, Claude apps |
| GitHub stars | 107,574 | 48,424 |
| Last commit | 24 Oct 2026 | 24 Oct 2026 |
| Licence | Apache-2.0 | MIT |
| Listed since | 23 Oct 2026 | 23 Oct 2026 |
| Install spec_generator | Install app-builder |
Questions
Is spec_generator or app-builder more popular?
spec_generator has more GitHub stars: 107,574.
Can I use spec_generator and app-builder together?
Yes. AI assistants can load several skills at once. Install both and the assistant picks the right one for each task.