2026 · No.15
Where ideastake shape.
mcsÉdition designs and publishes mobile apps, developer tools and SaaS platforms. Fifteen products, one standard: care for detail, from the first line of code to the last pixel.
We are not an agency. mcsÉdition is a software publishing house. Each product is an edition in its own right, conceived, designed and maintained with the rigour of an object you sign.
Fifteen editions, three collections.
Mobile apps, developer tools, SaaS platforms. Each edition solves one precise problem, nothing superfluous.
Four tools, public and maintained.
Part of our work is open under a permissive licence, used in production, documented, and built to last.
HILT
Python · Apache-2.0Privacy-first logging for human-AI interactions. One line of code to trace every LLM call.
Mako
Go · Open sourceReal-time data pipelines described in YAML. Declarative input, events out.
VectLite
Rust · local-firstAn embedded vector database for local AI. Light, fast, serverless.
Données Québec MCP
Python · MCPAn MCP server that opens Quebec's public data to AI agents.
Workshop notes.
What we learn while building: product, engineering, field.
An idea to publish?
Partnership, press, or simple curiosity: the workshop door is open.