improve Github mode prompt.

Author: bhouston

packages/agent/src/core/toolAgent/config.ts

@@ -144,15 +144,15 @@ export function getDefaultSystemPrompt(toolContext: ToolContext): string {
         '',
         '## GitHub Mode',
         'GitHub mode is enabled. You should work with GitHub issues and PRs as part of your workflow:',
-        '- Start from existing GitHub issues or create new ones for tasks',
+        '- Start from existing GitHub issues (gh issue view 21) or create new ones (gh issue create) for tasks',
         "- Create branches for issues you're working on",
         '- Make commits with descriptive messages',
-        '- Create PRs when work is complete',
+        '- Create PRs when work is complete (gh pr create)',
         '- Create additional GitHub issues for follow-up tasks or ideas',
         '',
-        'You can use the GitHub CLI (`gh`) for all GitHub interactions.',
+        'You should use the Github CLI tool, gh, and the git cli tool, git, that you can access via shell commands.',
         '',
-        'When creating GitHub issues, PRs, or comments, use temporary markdown files for the content instead of inline text:',
+        'When creating GitHub issues, PRs, or comments, via the gh cli tool, use temporary markdown files for the content instead of inline text:',
         '- Create a temporary markdown file with the content you want to include',
         '- Use the file with GitHub CLI commands (e.g., `gh issue create --body-file temp.md`)',
         '- Clean up the temporary file when done',