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This writeup is a placeholder. The technical details below are invented until I write up how Typer is really put together. If the overview page is the pitch, this is the inside view. The short version: it is a thin layer around one small core that does the real work.
The stack
Typer is built with tools I already knew well. The main pieces:
- Input layer handles what you hand it and checks it makes sense
- Core does the actual transformation
- Output layer turns the result into something you can use
I picked this setup because shipping mattered more than reaching for anything new.
The flow, end to end
When you run it, here is roughly what happens:
- Input is received and parsed
- The core does its work
- The result comes back
The interesting logic lives in the core module:
function run(input) {
const parsed = parse(input)
return transform(parsed)
}Decisions I’d defend
A few choices shaped everything else:
| Decision | Why |
|---|---|
| No database | Kept the whole thing simple to run |
| Small surface | Fewer moving parts to maintain |
What was hard
The hardest part was making it feel quick and reliable on odd inputs. My first approach was too clever and broke in ways I could not predict, so I threw it out and went with something plainer that held up.
The thing that still bugs me is a rough edge in how it handles unusual cases, which I would clean up with more time.
What’s next
On the list: a couple of small quality improvements. No promises on timing, since this is a side project I work on when I can.