Keyboard Simple
An Android keyboard library documented through its public source, Apache-2.0 license, release 1.0.5, and downloadable AAR.
- Android
- Kotlin
- Java
Software developer · Lima, Perú
Carlos Alarcon
I build mostly for mobile, but the question that drives me works at any layer: how should this be made. I write down what I learn along the way.
Work
Building & writing · 2026
Interactive 3D model preview.
RobotExpressive by Tomás Laulhé · CC0
Work
Things I've built — libraries, apps, and tools.
Lab
Local-first dev tools that run in your browser.
JSON Formatter
Format, minify, and validate JSON locally in the browser with explicit parse errors and no network requests.
- Developer tools
- JSON
- Web
IPv4 Subnet Calculator
Calculate network, broadcast, mask, and usable IPv4 ranges locally from an address and CIDR prefix.
- Networking
- Developer tools
- Web
ASCII / Unicode Inspector
Inspect characters as decimal code points and padded Unicode notation while preserving complete Unicode characters.
- Encoding
- Developer tools
- Web
Notes
Writing on what I build and research.
MHS is not MCP for hardware
Anthropic opened its hardware standard on 27 August as a closed research preview. It is not built on MCP, and the number worth quoting comes from a laser lab.
- AI
- Architecture
- Developer tools
The number Codex Security did not publish
OpenAI open-sourced its security scanner and reported 92% recall. The number that decides whether the findings are usable — precision — was never published.
- Security
- Developer tools
- Architecture
What Chandra's 85.9% OCR score does not tell you
An open 5B model beats Gemini and GPT-5 Mini at document OCR. Two things the leaderboard omits: who wrote the benchmark, and what the licence permits.
- AI
- Architecture
- Performance
Gallery
Visual studies and curated collections.
Signal Archive
A shelf of first-party marks, grids, and orbital studies that records the visual language developed for this site.
- Design systems
- Visual language
- Web
San Francisco
A street and landscape set carried over from the previous site, kept as a working album while the archive's own photography grows.
- Visual language
Browse by topic
The subjects that run through the work, apps, and notes.