[Plugin] Docker Compose: manage compose CLI settings

[DotDev262]

Plugin: Docker Compose Config Provider

Manage Docker Compose CLI configuration settings stored in ~/.docker/config.json under the compose key (Docker Compose v2).

Config File Location

Platform	Path
Linux / macOS	~/.docker/config.json
Windows	%USERPROFILE%\.docker\config.json

Settings live under a compose key in the Docker config JSON. The existing docker plugin manages Docker Desktop settings (wslEngine, kubernetes, etc.) — this plugin focuses specifically on Docker Compose v2 CLI configuration.

Settings

Common settings that can be managed:

• experimental — Enable experimental Compose features (bool)
• projectName — Default project name template (string)
• version — Docker Compose schema version (string)
• profiles — Default profiles to enable (list of strings)
• dependencies — Dependency resolution behavior
• env_file — Default env file path
• attach — Default attach configuration

Implementation Requirements

• config_provider type plugin
• JSON config format, deep-merge the compose key into ~/.docker/config.json
• Must read existing file, merge compose settings, write back atomically
• Full protocol compliance (requestId, check_installed bare bool, settings from args, dryRun from args, no success/data fields)
• Atomic writes via tempfile.mkstemp + os.replace
• Empty stdin returns JSON error
• POSIX trailing newlines
• Test file with sys.path.append (not sys.path.insert(0))

Acceptance Criteria

• Plugin created under plugins/docker-compose/
• plugin.yaml, src/plugin.py, test/test_docker_compose.py included
• All tests pass
• Protocol compliant
• Works on both Windows and Unix paths

[amanyadav2107]

/assign

[goelakshita708]

Hi, I'd like to work on this issue. Could you please assign it to me?

[DotDev262]

Assigned to @amanyadav2107 (first requester) under GSSoC'26! Please follow the standard plugin pattern in plugins/*/src/plugin.py — Python, JSON-over-stdio, config_provider, requestId in all responses. Per the one-issue-per-contributor policy, this is your only active issue. Good luck!