A catalog of ChatGPT & Codex plugins, sorted by people.
Krypton alternatives
Krypton by jturntdev: Goal-based planning and proof gate for Codex and Claude Code that turns requests into ownership, cutover, review-gate, and acceptance-evidence plans. Here are 5 plugins in our catalog that describe a similar job, with the numbers you'd check before switching.
Why you might look elsewhere
- Want active development? Flowtrace, Andon, Zagrosi Forge got a push in the last two weeks.
- Want the most-watched option? Andon has 168 stars to Krypton's 130.
5 alternatives, side by side
| Plugin | Stars | License | Last push | Packaged as |
|---|---|---|---|---|
| Codex Reviewer Second-pass review of Claude-driven plans and implementations. | ★ 15 | MIT | 2026-05-05 | plugin |
| Zagrosi Forge Decompose broad project briefs into researched plans and implement sectioned work with TDD, quality gates, and traceability. | ★ 8 | MIT | 2026-11-05 | plugin |
| Unity Agent Workflows Codex plugin and skill for Unity 2D agents that enforces "No proof, no edit" workflows with runtime-owner proof, Teach structure maps, and validation gates. | ★ 1 | MIT | 2026-10-02 | skills |
| Flowtrace Claude Code and Codex plugin with skills to plan a change before coding, explain how code works with flowcharts, and review pull requests. | ★ 4 | Apache-2.0 | 2026-11-14 | plugin, skills |
| Andon Stop hooks that stop a coding agent from claiming "done" without proof, using a same-session verification log, warn or block mode, and a public defect ledger. | ★ 168 | MIT | 2026-11-13 | plugin |
Picked by overlap between each project's own description and Krypton's, same category first. Ordered by that overlap, not by stars or payment.
Head-to-head
More: Review & Testing plugins · best Review & Testing plugins, ranked · all comparisons
Data from GitHub and each project's README, checked 2026-11-15. We haven't installed or audited these, and stars measure attention, not quality. Paid placements never change this page. Spot a mistake? hello@pickaplugin.com
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