head to head · open source
pstack-claude vs flow-next
pstack-claude has 3,791 GitHub stars, 346 forks, 1 open issues and last shipped yesterday. flow-next has 716 stars, 62 forks, 6 open issues and last shipped yesterday. pstack-claude leads on adoption by 429% (3,791 vs 716 stars). pstack-claude is written in TypeScript under MIT; flow-next is written in Python under MIT. pstack-claude has attracted 9% as many forks as stars, flow-next 9%. pstack-claude was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (anthropic, claude-code, code-review, codex), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| pstack-claude | flow-next | |
|---|---|---|
| GitHub stars | ★ 3.8K | ★ 716 |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 346 | ⑂ 62 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick pstack-claude if
- You weight community size — 3.8K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick flow-next if
- You want the flow-next feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and flow-next fits your workflow better
About pstack-claude
pstack Lauren Tan's pstack is an opinionated Cursor skill stack that improves agent outcomes. This is a port for Claude Code, Codex, Pi, GitHub Copilot and other agent harnesses. It tracks upstream and also carries named policy forks, each declared in tools/forks.json . Tell poteto mode your goal and it will invoke the correct workflow for the task. It keeps your code concise, simple and verified. For concurrency bugs and invariants that tests cannot reach, see the separate agent formal verify plugin, which adds TLA+ model checking and Lean proofs. Install Claude Code Run in Claude Code: Codex Run in your…
read the full pstack-claude overview →
About flow-next
Flow Next Agents generate. flow next proves. Implementation got cheap. Reviewing it, verifying it, and keeping a codebase coherent did not. Flow Next is a workflow plugin that runs inside your coding agent. Give it the change you want and the rules your project follows. It turns that intent into specs, implementation, review, and pull requests with evidence. Your specs, decisions, and task state live in your repository. A real recorded run: plan, then cross model plan review (catches a missing guard, fix, SHIP), then implement plus tests, then impl review SHIP, ending on the receipt. Nothing staged; every frame…
read the full flow-next overview →
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Frequently asked questions
Is pstack-claude or flow-next more popular?
pstack-claude has 3,791 GitHub stars and flow-next has 716. pstack-claude has the larger community by that measure.
Are pstack-claude and flow-next free?
Both are open source. pstack-claude is licensed under MIT and flow-next under MIT. Neither carries a licence fee.
What is the difference between pstack-claude and flow-next?
pstack-claude is written in TypeScript and flow-next in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, pstack-claude or flow-next?
Choose pstack-claude if you want the larger community (3,791 stars) or its MIT licence terms. Choose flow-next if its feature set, stack or MIT licence fits better. Both are self-hostable.