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Cross-platform TUI input compatibility library (NPM package)
An npm package that abstracts terminal mouse initialization with correct DECSET sequence ordering, automatically detecting ConPTY environments and applying the appropriate timing fixes. TUI application developers integrate it to eliminate Windows-specific mouse input bugs without maintaining their own escape sequence workarounds.
Why this matters
You are a developer building a terminal-based application on Windows. After months of work, users report that mouse wheel scrolling is completely broken — instead of scrolling the transcript, it cycles through command history. You spend hours debugging escape sequences, discovering that Windows ConPTY silently drops mouse tracking DECSET codes when stdin is not yet in raw mode. You write a custom TypeScript extension to reorder initialization calls, but it breaks with different terminal emulators. Every TUI framework has this same latent bug, and there is no library that abstracts away the ConPTY quirks. You wish someone had already solved this once and for all.
- · Built for Developers building terminal user interface applications (TUI apps, CLI tools, AI coding agents) using Node.js or Rust who need cross-platform mouse input support including Windows ConPTY environments.
- · Most likely monetization: freemium.
The Pain · Narrative
You are a developer building a terminal-based application on Windows. After months of work, users report that mouse wheel scrolling is completely broken — instead of scrolling the transcript, it cycles through command history. You spend hours debugging escape sequences, discovering that Windows ConPTY silently drops mouse tracking DECSET codes when stdin is not yet in raw mode. You write a custom TypeScript extension to reorder initialization calls, but it breaks with different terminal emulators. Every TUI framework has this same latent bug, and there is no library that abstracts away the ConPTY quirks. You wish someone had already solved this once and for all.
Score Breakdown
Market Signal
Go-to-Market
Indie developers and small teams building Node.js-based TUI applications and AI coding agents who need Windows compatibility
~30,000 active Node.js TUI/CLI developers globally, with perhaps 5,000-8,000 actively dealing with Windows terminal compatibility
GitHub open-source release with HN launch, targeting developer communities discussing terminal and TUI topics
Free open-source core library with $9/month tier for premium diagnostic tools and priority compatibility patches
500 GitHub stars and 20 npm weekly downloads within 30 days of launch
MVP Scope · 1–2 weeks
- Research and document the DECSET sequence ordering issue across 5 major Windows terminals
- Build a minimal Node.js module that detects ConPTY and reorders mouse initialization sequences
- Write automated tests simulating ConPTY behavior with mock stdin/stdout streams
- Create a demo TUI app that reproduces the mouse scrolling bug and shows the fix working
- Publish initial npm package with basic detection and fix functionality
- Add compatibility patches for popular TUI frameworks (Ink, blessed) as plugin modules
- Build a diagnostic CLI tool that detects terminal capabilities and reports DECSET handling issues
- Test across Alacritty, Windows Terminal, WezTerm, and mintty on Windows 11
- Write comprehensive documentation with integration guides for TUI developers
- Launch on developer communities (HN, dev forums) with the demo and diagnostic tool
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1Microsoft may release a ConPTY update that fixes the silent sequence dropping, eliminating the core problem the library addresses and making it obsolete overnight.
- 2The target audience of open-source TUI developers strongly prefers free community-maintained solutions and may fork or replicate the fix rather than paying for a premium tier.
- 3TUI framework maintainers may implement the initialization ordering fix directly in their own projects after seeing the issue documented, removing the need for a third-party library.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
Approximately five commenters reported broken mouse wheel scrolling in TUI applications on Windows, spanning multiple terminal emulators (WezTerm, Windows Terminal, mintty) and configurations (Zellij, SSH, direct terminal). One user wrote a detailed custom TypeScript extension to fix the escape sequence ordering issue. Multiple users confirmed the bug started with version 1.0 updates and persists across versions 1.0.0 through 1.1.0. The community has deep technical understanding of the ConPTY root cause but lacks a centralized solution, with each user implementing individual workarounds.
Action Plan
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Headline
Cross-platform TUI input compatibility library (NPM package)
Sub-headline
An npm package that abstracts terminal mouse initialization with correct DECSET sequence ordering, automatically detecting ConPTY environments and applying the appropriate timing fixes. TUI application developers integrate it to eliminate Windows-specific mouse input bugs without maintaining their own escape sequence workarounds.
Who It's For
For Developers building terminal user interface applications (TUI apps, CLI tools, AI coding agents) using Node.js or Rust who need cross-platform mouse input support including Windows ConPTY environments
Feature List
✓ Automatic ConPTY detection and DECSET sequence timing correction ✓ Cross-platform mouse input normalization layer for Node.js TUI apps ✓ Diagnostic mode that logs escape sequence flow for debugging terminal issues ✓ Pre-built compatibility patches for popular TUI frameworks (Ink, blessed, Pi extensions) ✓ CI test harness simulating major Windows terminal emulators
Where to Validate
Share your landing page in r/GitHub · earendil-works/pi — that's exactly where these pain points were discovered.
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