uv run, add, remove removes installed non-default groups when there are conflicts

[lendle]

Summary

Example:

[project]
name = "example"
version = "0.1.0"
requires-python = ">=3.10"
dependencies = [
    "torch",
]

[dependency-groups]
torch1 = ["torch<2"]
torch2 = ["torch>=2"]

[tool.uv]

conflicts = [[{ "group" = "torch1" }, { "group" = "torch2" }]]

Then:

❯ uv sync --python 3.10 --group torch1
Resolved 32 packages in 6ms
Audited 2 packages in 0.04ms
❯ uv add rich
Resolved 36 packages in 117ms
Uninstalled 1 package in 535ms
Installed 12 packages in 383ms
 + filelock==3.18.0
 + fsspec==2025.3.2
 + jinja2==3.1.6
 + markdown-it-py==3.0.0
 + markupsafe==3.0.2
 + mdurl==0.1.2
 + mpmath==1.3.0
 + networkx==3.4.2
 + pygments==2.19.1
 + rich==14.0.0
 + sympy==1.14.0
 - torch==1.13.1
 + torch==2.7.0

The torch1 group is removed from the environment, and I have to re-sync with --group torch1 to repair the environment.

I thought it may have to do with torch1 not supporting python >3.10, but the same happens if the groups are torch 2.2 vs torch 2.3

Platform

Debian 11, Darwin 24.4.0 arm64

Version

uv 0.7.2

Python version

Python 3.10, 3.11, ...

[lendle]

For posterity, as a workaround I've been adding torch1 to the default-groups config. Which works fine when I want torch1, but when working with torch 2, uv sync --no-group torch1 --group torch2 fails. uv-sync --no-default-groups --group dev --group torch2 works.

Running uv run with --no-sync also works, but using --no-sync with add or remove doesn't help since the env needs to be synced anyway with appropriate groups.

[konstin]

CC @BurntSushi for conflict and @Gankra for dependency group selection

[lendle]

The same issue happens with extras

[project]
name = "example"
version = "0.1.0"
requires-python = ">=3.10"
dependencies = [
    "rich>=14.0.0",
    "torch",
]

[project.optional-dependencies]
torch1 = ["torch<2"]
torch2 = ["torch>=2"]

[tool.uv]

conflicts = [[{ "extra" = "torch1" }, { "extra" = "torch2" }]]

[charliermarsh]

This can be merged into #9012. The behavior around extras and groups with uv remove is confusing.

[lendle]

@charliermarsh it looks like #9012 is specifically about remove? This issue also affects add, so I'm not sure it's a dupe