docs: cli external editor

[dianed-square]

Summary

This PR documents external editor support for goose CLI.

Documentation updates:

• documentation/docs/guides/environment-variables.md:
  • Add GOOSE_PROMPT_EDITOR to table and examples in "Session Management"
• documentation/docs/guides/goose-cli-commands.md:
  • Add "External Editor Mode" subsection under "Navigation and Controls"

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/0/0/1213044694587571

[Copilot]

Pull request overview

This PR documents the external editor support feature for goose CLI, allowing users to compose prompts in their preferred text editor instead of the standard CLI input.

Changes:

• Adds documentation for GOOSE_PROMPT_EDITOR environment variable to the Session Management section
• Adds a new "External Editor Mode" subsection under Navigation and Controls with configuration examples and usage instructions

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
documentation/docs/guides/goose-cli-commands.md	Adds comprehensive "External Editor Mode" section with configuration examples for both environment variable and config file approaches, plus guidance for GUI editors
documentation/docs/guides/environment-variables.md	Adds GOOSE_PROMPT_EDITOR to the Session Management table and includes a usage example in the Examples section

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-02-03 19:26 UTC