Replace public shell signals with events

Description

This issue does not include a description.

Contributor guide

Tech stack

typescript

Domain

backendtooling

Issue type

refactor

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

unclear

Prerequisites

understanding of Theia's signal/event systemTypeScript

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

20

Research direction

Investigate the current usage of 'shell signals' in the Theia codebase, specifically in the shell package. Look for patterns like 'on*' or 'Signal' from the 'phosphor' library. Propose a replacement using a standard event emitter or Theia's own event system. There is no description in the issue, so the first step is to clarify the scope by asking maintainers which signals are meant and what the desired event based approach should look like. Refer to linked resources in the repository for existing event patterns.