A catalog of ChatGPT & Codex plugins, sorted by people.
oh-my-openspec alternatives
oh-my-openspec by alexeyco: Spec-driven development workflow for Codex CLI and OpenCode, with planning, parallel task execution, and mechanical OpenSpec validation. Here are 8 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? Aegis, YYLO, Archcore got a push in the last two weeks.
- Want the most-watched option? Aegis has 1,443 stars to oh-my-openspec's 9.
- On a different tool? Workflow Kit mentions Claude Code.
8 alternatives, side by side
| Plugin | Stars | License | Last push | Packaged as |
|---|---|---|---|---|
| Workflow Kit Full product lifecycle plugin for Claude Code, Codex CLI, and OpenCode: define Vision/Mission/Core → generate workplan → execute with mandatory cross-provider reviewer agents → synthesize deliverables → maintain, with parallel task execution, crash recovery, and AgentOps metrics. | ★ 1 | MIT | 2026-06-02 | plugin |
| AgiFlow Project management workflows for AI coding agents with planning, grooming, task execution, review, and AgiFlow MCP integration. | ★ 4 | MIT | 2026-10-10 | MCP server, plugin |
| Spec-Driven Development Three-phase Requirements → Design → Tasks workflow for Claude Code and Codex — EARS notation acceptance criteria, autonomous execution loop, cross-spec dependencies, and post-implementation acceptance testing. | ★ 10 | MIT | 2026-11-01 | plugin |
| Project Autopilot Turn an idea into a structured project workflow with planning, execution, verification, and handoff. | ★ 16 | MIT | 2026-04-09 | plugin |
| Archcore Spec-driven development and context engineering for Claude Code, Cursor, Codex, and GitHub Copilot — backed by project context in Git. | ★ 75 | Apache-2.0 | 2026-11-07 | plugin |
| Thermal-Fluid Research Workflow Thermal-fluid mechanical engineering research workflow for literature review, technical writing, data analysis, presentations, proposals, coding, and AI/ML tools. | ★ 26 | MIT | 2026-11-06 | plugin |
| Aegis An agentic skills framework & software development methodology that works: planning, TDD, debugging, and collaboration workflows. | ★ 1,443 | MIT | 2026-11-14 | skills |
| YYLO Command-line orchestrator for coding agents that creates a dedicated branch/worktree per task, delegates to Pi and Codex subagents, and enforces typed task, validation, merge, and release-readiness boundaries with receipt-backed repository changes. | ★ 67 | MIT | 2026-11-13 | plugin |
Picked by overlap between each project's own description and oh-my-openspec's, same category first. Ordered by that overlap, not by stars or payment.
Head-to-head
oh-my-openspec vs Workflow Kit · oh-my-openspec vs AgiFlow · Project Autopilot vs oh-my-openspec
More: Agent Workflows plugins · best Agent Workflows 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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