# Technical implementation topics

To access a subtopic, use "hg help internals.{subtopic-name}"

> bid-merge: | Bid Merge Algorithm
> bundle2: | Bundle2
> bundles: | Bundles
> cbor: | CBOR
> censor: | Censor
> changegroups: | Changegroups
> config: | Config Registrar
> dirstate-v2: | dirstate-v2 file format
> extensions: | Extension API
> mergestate: | Mergestate
> requirements: | Repository Requirements
> revlogs: | Revision Logs
> wireprotocol: | Wire Protocol
> wireprotocolrpc:
> | Wire Protocol RPC
> wireprotocolv2: | Wire Protocol Version 2