This is inspired by the following two related questions:
- Can my familiar use the bonus attack from two-weapon fighting to make its own attack?
- Can you use Commander's Strike to forgo an attack granted by Horde Breaker?
Notably, the features in question (Warlock's Pact of the Chain Pact Boon and Battle Master Fighter's Commander's Strike) both allow you to forgo an attack after taking the Attack action:
[...] Additionally, when you take the Attack action, you can forgo one of your own attacks to allow your familiar to make one attack with its reaction.
[...] When you take the Attack action on your turn, you can forgo one of your attacks and use a bonus action to direct one of your companions to strike. [...]
And the other features asked about (Two-Weapon Fighting and the Hunter Ranger's Horde Breaker feature) both grant an additional attack that is not part of the Attack action:
When you take the Attack action and attack with a light melee weapon that you're holding in one hand, you can use a bonus action to attack with a different light melee weapon that you're holding in the other hand. [...]
Once on each of your turns when you make a weapon attack, you can make another attack with the same weapon [...]
The answers to those questions do not all agree, and part of their differences lies in the fact that these additional attacks are not part of the Attack action, which are exactly the type of attacks I would now like to ask about. A particular example would be the Gloom Stalker Ranger's Stalker's Flurry feature, which states (emphasis mine):
[...] Once on each of your turns when you miss with a weapon attack, you can make another weapon attack as part of the same action.
How does this feature interact with things like Commander's Strike and Pact of the Chain? Can the additional attack be forgone by these features?