Practical technical guides for cybersecurity, AI, automation, code and infra. Step-by-step methods, commented code, production-ready checklists.
By MAG&Cie, a consulting firm run by a freelance CTO/CPO since 2015 — certified outsourced CISO.
Step-by-step guide to publish an iOS and Android app on the stores in 2026: developer accounts, certificates, signing, asset preparation, TestFlight, Internal Testing, review submission, rejection handling, post-publication versioning. Realistic timeline, checklists, pitfalls.
The real risk isn't a hacker stealing your passwords. It's that a critical account — bank, domain, hosting — is held by a single person. The day they leave, no one can log in. SMB guide to turn this single point of failure into a process.
Step-by-step guide to build your own MCP server in Python with FastMCP: minimal skeleton, 6 realistic tools (Notion search, task upsert, list projects, page summary, email dispatch, get metrics), in-memory cache, stdio and HTTP transports with bearer auth, VPS deployment, connection to Claude Desktop and Hermes Agent. Field notes from Roger, MAG&Cie's internal Notion assistant.
Starting 1 September 2026, every French business subject to VAT must be able to receive electronic invoices. This guide explains what a freelancer or micro-business (TPE) must do in practice: vocabulary, official calendar, choosing a PDP, formats (Factur-X / UBL / CII), the VAT-exempt case, 7-step migration plan and the 5 mistakes to avoid.
Step-by-step guide to installing Hermes Agent, the open-source autonomous AI agent from Nous Research (MIT license). Configuration, Telegram integration, building a customer-reception agent, self-hosted deployment security, production checklist.
Complete vendor-neutral guide to add 'Sign in with Google' and 'Sign in with Microsoft' to your application. OpenID Connect (OIDC), Authorization Code + PKCE flow, Google Cloud and Entra ID setup, ID token validation, production checklist, Node.js and Python examples.