FLIN
The language that replaces 47 technologies
A compiled, full-stack programming language built from scratch in Rust. One syntax for frontend, backend, database, and tooling. 3,200+ tests. 180 embedded UI components. Zero npm dependencies.
Building FLIN
JWT Authentication in 3 Lines of FLIN
How FLIN's built-in JWT functions -- create_token, verify_token, refresh_token -- reduce token-based authentication to three lines of code with secure defaults.
Rate Limiting and Security Headers
How FLIN provides built-in rate limiting with sliding windows and automatic security headers on every response -- protecting applications against abuse, XSS, clickjacking, and MIME sniffing by default.
Two-Factor Authentication (TOTP)
How FLIN implements TOTP two-factor authentication as a built-in feature -- secret generation, QR codes, verification, and backup codes in four function calls.
Naming a Language After an Elephant: The Fongbe Origin of FLIN
FLIN's name comes from Fongbe (Benin): 'E flin nu' means 'It remembers things.' The elephant never forgets.
The Complete Compilation Pipeline, End to End
FLIN's complete compilation pipeline: six phases from source code to running application, explained end to end.
Destructuring Everywhere
How we implemented destructuring in FLIN -- array, entity, and nested destructuring with rest patterns, default values, and the stub-first approach that kept the compiler healthy.
Advanced Type Features: The Complete Picture
A retrospective on FLIN's complete type system -- how inference, union types, generics, traits, tagged unions, pattern matching, and control flow features form a coherent whole.
Time Arithmetic: Adding Days, Comparing Dates
How we implemented duration literals and time arithmetic in FLIN -- from the elegant N.days syntax to constant folding at compile time, delivering zero-cost abstractions for date operations.
The Temporal Model Complete: What No Other Language Has
A retrospective on FLIN's complete temporal model -- 152 out of 160 tasks, 10 categories at 100%, and why no other programming language offers automatic versioning, time-travel queries, and temporal analytics as language primitives.
FlinDB vs SQLite: Why We Built Our Own
A detailed comparison of FlinDB and SQLite -- where they overlap, where they diverge, and why we built a custom database engine for the FLIN programming language instead of embedding SQLite.
FastEmbed Integration for Embeddings
How FLIN integrates FastEmbed for local embedding generation -- no API calls, no network latency, no data leaving the server. Privacy-first semantic search at 10ms per embedding.
RAG: Retrieval, Reranking, and Source Attribution
How FLIN implements Retrieval-Augmented Generation -- semantic retrieval from your data, cross-encoder reranking for precision, and source attribution so users know where answers come from.