**Table of Contents** *generated with [DocToc](https://github.com/thlorenz/doctoc)* - [The Merge -- Client Settings](#the-merge----client-settings) - [Override terminal total difficulty](#override-terminal-total-difficulty) # The Merge -- Client Settings **Notice**: This document is a work-in-progress for researchers and implementers. This document specifies configurable settings that clients must implement for the Merge. ### Override terminal total difficulty To coordinate manual overrides to [`terminal_total_difficulty`](fork-choice.md#transitionstore), clients must provide `--terminal-total-difficulty-override` as a configurable setting. If `TransitionStore` has already [been initialized](./fork.md#initializing-transition-store), this alters the previously initialized value of `TransitionStore.terminal_total_difficulty`, otherwise this setting initializes `TransitionStore` with the specified, bypassing `compute_terminal_total_difficulty` and the use of an `anchor_pow_block`. `terminal_total_difficulty`. Except under exceptional scenarios, this setting is expected to not be used, and `terminal_total_difficulty` will operate with [default functionality](./fork.md#initializing-transition-store). Sufficient warning to the user about this exceptional configurable setting should be provided. [here](fork.md#initializing-transition-store).