Mysti
Claude, Codex, and Gemini debate your code, then synthesize
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Hey HN! I'm Baha, creator of Mysti.The problem: I pay for Claude Pro, ChatGPT Plus, and Gemini but only one could help at a time. On tricky architecture decisions, I wanted a second opinion.The solution: Mysti lets you pick any two AI agents (Claude Code, Codex, Gemini) to collaborate. They each analyze your request, debate approaches, then synthesize the best solution.Your prompt → Agent 1 analyzes → Agent 2 analyzes → Discussion → Synthesized solutionWhy this matters: each model has different training and blind spots. Two perspectives catch edge cases one would miss. It's like pair programming with two senior devs who actually discuss before answering.What you get: * Use your existing subscriptions (no new accounts, just your CLI tools) * 16 personas (Architect, Debugger, Security Expert, etc) * Full permission control from read-only to autonomous * Unified context when switching agentsTech: TypeScript, VS Code Extension API, shells out to claude-code/codex-cli/gemini-cliLicense: BSL 1.1, free for personal and educational use, converts to MIT in 2030 (would love input on this, does it make sense to just go MIT?)GitHub: https://github.com/DeepMyst/MystiWould love feedback on the brainstorm mode. Is multi-agent collaboration actually useful or am I just solving my own niche problem?
HN · launched Dec 23, 2025 · 216 upvotes (top 4%) · 0 views
Niche: automated code review tools · 204 launches, 7 in the last 7 days ▼ -22% · Explore this niche →
Category and tags
- Horizontal
- Agent / copilot
- Developer
- AI-native
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 204 launches in automated code review tools →
Could you build this?
Yes The core tool is a standard orchestration script or web app that prompts multiple LLM APIs in sequence or parallel and presents their synthesized debate outputs.
Discussion
20 comments analyzed.
Competitors mentioned: Gemini, Claude, Cursor, GitHub Copilot CLI, Codex
Concerns raised: Multi-agent coordination yields diminishing returns above ~45% baseline performance, Context optimization critical to avoid high costs from compacting, Not clear if output quality has improved over past 5 years, Risk of unwanted code clobbering when agents make changes, Measurement and validation of benefits still lacking
Feature requests: CLI mode support (not just VS Code IDE), Additional providers like Cursor, Ability to tag/reference another agent, tmux integration for agent coordination, Reverse code review workflow (agent implementation followed by another agent review)
Competitors
Other products that read as similar to this one : 979 launches clear the similarity bar, closest 8 shown.
Attention rank: #95 of 980 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 49 days after the earliest competitor.
- I got tired of switching AI tools, so I built an IDE with 11 of them · hn · 2025-12-09 · 20 upvotes · similarity 0.58
- Gemini Plugin for Claude Code · hn · 2026-04-22 · 11 upvotes · similarity 0.56
- ThreadRig · ph · 2026-11-09 · 2 upvotes · similarity 0.55
- Parallel Agents · ph · 2026-10-02 · 1 upvotes · similarity 0.54
- Full Stack HQ · hn · 2026-05-14 · 10 upvotes · similarity 0.54
- NekoTrail · ph · 2026-11-09 · 2 upvotes · similarity 0.54
- myco · github · 2026-11-05 · 58 upvotes · similarity 0.53
- Quorus · ph · 2026-10-19 · 2 upvotes · similarity 0.53
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