docs: run extensions in containers

[dianed-square]

Summary

Documents the --container flag for running extensions in Docker containers.

Documentation updates:

• documentation/docs/getting-started/using-extensions.md:
  • Add "Extensions in Containers" section for discoverability
• documentation/docs/guides/goose-cli-commands.md:
  • Add --container flag to session and run commands
• documentation/docs/mcp/container-use-mcp.md:
  • Add link to "Isolated Development Environments" topic
• documentation/docs/tutorials/goose-in-docker.md:
  • Expand scope to "goose and Docker" and remove "Building" from title
  • Add crosslink for alt scenario
  • Add "Running Extensions in a Container" section
• documentation/docs/tutorials/isolated-development-environments.md:
  • Add crosslink for alt scenario
  • Replace configuration instructions with link to container-use-mcp tutorial

Type of Change

• Feature
• Bug fix
• Refactor / Code quality
• Performance improvement
• Documentation
• Tests
• Security fix
• Build / Release
• Other (specify below)

AI Assistance

• This PR was created or reviewed with AI assistance

Testing

Manual testing

---

• To see the specific tasks where the Asana app for GitHub is being used, see below:
  • https://app.asana.com/0/0/1213086724914361

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-02-05 17:21 UTC

[Copilot]

Pull request overview

This PR documents the --container flag that allows running goose extensions inside Docker containers, expanding the documentation to cover devcontainer workflows.

Changes:

• Adds comprehensive documentation for the --container flag across CLI command references
• Creates new section on running extensions in Docker containers with usage examples and requirements
• Refactors documentation structure to separate container-use MCP extension setup from general Docker usage
• Adds cross-references between related Docker and container documentation topics

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
documentation/docs/tutorials/isolated-development-environments.md	Removes detailed installation instructions (delegated to container-use-mcp tutorial) and adds cross-reference for devcontainer users
documentation/docs/tutorials/goose-in-docker.md	Expands scope from "Building goose in Docker" to cover both running goose in Docker and running extensions in containers; adds new section with --container flag documentation
documentation/docs/mcp/container-use-mcp.md	Adds cross-reference link to isolated development environments tutorial
documentation/docs/guides/goose-cli-commands.md	Documents --container flag for both session and run commands
documentation/docs/getting-started/using-extensions.md	Adds "Extensions in Containers" section with cross-reference to detailed documentation

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.