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I built an open-source alternative to Kiro, Cursor, and Windsurf

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HN · launched Apr 5, 2026 · 103 upvotes (top 10%) · 0 views

Niche: ai code editors · 86 launches, 5 in the last 7 days · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Developer
  • AI-native
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 86 launches in ai code editors →

Could you build this?

No Building an AI-first IDE alternative to Cursor or Windsurf requires deep desktop systems engineering, language server protocol (LSP) integrations, custom fork of VS Code / Monaco, and real-time streaming diff architectures.

What it would actually take: The standard approach requires forking VS Code (Electron + TypeScript) and deeply modifying core editor components to support ghost text, inline completions, AST-aware repository indexing, and multi-file background agents. The hard components are low-latency speculative decoding integration, AST/semantic chunking for entire codebases via tree-sitter, and building robust multi-file unified diff engines that apply edits without breaking parse trees. This requires senior software engineering across systems, editor internals, and model orchestration.

Discussion

20 comments analyzed.

Competitors mentioned: Claude Code, git worktree solutions, Obsidian Kanban plugin

Concerns raised: AI agent sycophancy - agrees with wrong assumptions instead of pushing back, Multi-file edits across monorepos - tools fall apart, Subagents fighting over same git instance in monorepo workflows, Market saturation - yet another agentic IDE/VSCode clone

Feature requests: Guardrails against sycophancy in planning stage, Multi-branch parallel work support with sandbox isolation, Better monorepo multi-file editing handling

Competitors

Other products that read as similar to this one : 4531 launches clear the similarity bar, closest 8 shown.

Attention rank: #452 of 4532 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 157 days after the earliest competitor.

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.