Warn users if they create a package in a workspace without listing them as a member

Description

warning: compiling this new package may not work due to invalid workspace configuration

current package believes it's in a workspace when it's not:
current:   /Users/kayagokalp/fuel/dev/sway/forc-error/Cargo.toml
workspace: /Users/kayagokalp/fuel/dev/sway/Cargo.toml

Contributor guide

Tech stack

rust

Domain

toolingdeveloper experience

Issue type

feature

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

2

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

1-3 hours

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

active

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

clear

Prerequisites

basic Rust knowledgeunderstanding of workspace structure

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

75

Research direction

Investigate how cargo generates warnings for packages not listed in workspace members (e.g., the warning message about invalid workspace configuration). Then, locate the workspace handling code in sway, likely in sway core or similar crates. Add a similar warning when a new package is created inside a workspace directory but not included in the [workspace] members in the root Cargo.toml. Follow the existing warning patterns and ensure compatibility with the workspace manifest parsing.