Throughspec v1.0 - spec-driven development for Claude Code, now on npm + PyPIRead the docs
About

We build the rails, not the train.

Throughspec started from a simple frustration: AI coding tools are astonishing at generating code and terrible at remembering why. The gap between a good idea and shipped software wasn’t capability - it was process. So we built the process, and made it a precondition.

BELIEF 01

Process is a feature.

The best tooling doesn’t just generate output - it shapes how the work gets done. We treat the workflow itself as the product, and the generated code as a downstream effect of a good process.

BELIEF 02

Memory is leverage.

A project that remembers its own decisions is exponentially cheaper to extend. We optimize relentlessly for token-lean, append-only memory so the hundredth prompt costs about what the first did.

BELIEF 03

Determinism over cleverness.

A predictable, boring structure beats a clever, surprising one. We’d rather refuse to proceed than improvise - every gate, every step, every log exists to remove ambiguity.

2
distribution channels - npm and PyPI - from a single source-of-truth template tree.
9
slash commands covering scaffolding, specs, features, bugs, docs, and sync.
MIT
licensed and fully open - fork it, audit it, ship it.
How we got here

A short, opinionated history.

The itch
Drift, every time
We kept watching promising AI-built projects collapse under their own context - great starts, lost intent, ballooning cost.
The thesis
Spec beats vibe
We bet that enforcing a spec-first process up front would beat any amount of prompt cleverness later.
The build
The memory layer
Append-only memory files turned re-derivation from a recurring tax into a one-time investment.
v1.0
Throughspec ships
A publishable kit on npm and PyPI - scaffold, spec, plan, and ship, on rails, for Claude Code.
Maintainer

Built and maintained by Vishal Patil.

AI engineer and researcher shipping end-to-end AI products from specification through production. Prior work includes VAi, an AI assistant that talks to recruiters on a job seeker’s behalf - it went viral and was featured by CNBC.

Throughspec is the SDLC I wish existed when I started building with Claude Code - spec-driven, drift-proof, token-lean. Open to work across the US & Europe.

Open source. MIT licensed. Yours to fork.