> Documentation index: https://stilldeeppos.com/llms.txt

# StillDeep documentation

> Guides to understand StillDeep, build a register screen, write extensions and run a business server, plus the gRPC API reference.

Source: https://stilldeeppos.com/docs

## Guides
### [Core concepts](/docs/concepts)
Registers, shifts, carts, the outbox, printed numbers and the proxy: the vocabulary of StillDeep.
### [Build a register screen](/docs/build-a-client)
From the `.proto` files to a first finalized sale, in any gRPC language.
### [Extensions](/docs/extensions)
Add rules before and after sale actions, Admin sections and pages, without touching the core.
### [Install and operate](/docs/self-hosting)
What runs on the business server and the registers, the configuration and the health checks.

## API reference

The reference is generated from the contract and written in French:

- [gRPC API reference](/fr/docs/reference/grpc): every service, RPC, message and enumeration of `stilldeep.v1`.
- [Generate a client](/fr/docs/reference/sdk), then the guides for the [TypeScript client](/fr/docs/reference/sdk/typescript), the [Python client](/fr/docs/reference/sdk/python) and the [Go client](/fr/docs/reference/sdk/go).

## For AI agents

Every page of this site is also available in Markdown: add `.md` to its address, or ask for `text/markdown`. The index is [llms.txt](/llms.txt) and the full text is [llms-full.txt](/llms-full.txt).