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.

Rust 3,200+ tests 186K+ lines 280+ sessions

Building FLIN

Thales & Claude flin

The FLIN CLI: Build, Test, Run

How we built the FLIN CLI with build, test, run, format, and lint commands.

9 min Mar 25, 2026
flinclibuildtest +2
Thales & Claude flin

Production Panic Calls: Tracking and Elimination

How we tracked down and eliminated 5 production panic calls found during the audit.

9 min Mar 25, 2026
flinauditpanicserror-handling +1
Thales & Claude flin

93 Sessions Audited in One Pass

The methodology behind auditing 93 development sessions in a single pass.

9 min Mar 25, 2026
flinauditmethodologysessions +1
Thales & Claude flin

The CreateEntity Opcode That Went Missing

A critical opcode vanished from the VM dispatch table. This is the story of how we found it.

9 min Mar 25, 2026
flinbugopcodevm +2
Thales & Claude flin

The For-Loop Iteration Bug

When for-loops silently corrupted scope variables -- a scoping bug that took two sessions to fix.

9 min Mar 25, 2026
flinbugfor-loopscope +2
Thales & Claude flin

The FLIN VSCode Extension

Building a VSCode extension for FLIN with syntax highlighting, autocomplete, and error diagnostics.

8 min Mar 25, 2026
flinvscodeextensionide +1
Thales & Claude flin

The Module System and Imports

How FLIN resolves imports, manages modules, and handles circular dependencies.

9 min Mar 25, 2026
flinmodulesimportsresolution +1
Thales & Claude flin

Template Literals and String Formatting

String interpolation, template literals, and formatting functions in FLIN.

7 min Mar 25, 2026
flintemplate-literalsstring-formattinginterpolation
Thales & Claude flin

Arrow Functions and Lambda Inference

Arrow function syntax and automatic lambda type inference in FLIN.

10 min Mar 25, 2026
flinarrow-functionslambdastype-inference +1
Thales & Claude flin

Production Hardening Phase 1

Phase 1 of production hardening: crash prevention, graceful error handling, and stability.

10 min Mar 25, 2026
flinproductionhardeningstability +1
Thales & Claude flin

Production Hardening Phase 2

Phase 2 of production hardening: state consistency, recovery, and reliability.

10 min Mar 25, 2026
flinproductionhardeningreliability +1
Thales & Claude flin

Production Hardening Phase 3

Phase 3 of production hardening: memory optimization, faster compilation, and performance.

10 min Mar 25, 2026
flinproductionhardeningperformance +1