* feat(#1928): remove sunset gemini cli runtime, redirect to antigravity
Google sunset Gemini CLI on 2026-06-18; Antigravity CLI is its official successor (already a first-class GSD runtime). Remove the gemini runtime from the enum (16->15), aliases, labels, config-home fragment, install path, converters (convertClaudeToGemini{Markdown,Toml,Agent}, convertSlashCommandsToGeminiMentions), capability descriptor, gemini-extension.json, RULESET.GEMINI.*, and the interactive menu (renumbered, no gap).
--gemini now prints an explicit deprecation notice citing the 2026-06-18 sunset and redirects to --antigravity (no silent alias, per the issue's Hyrum's-Law rejection). Antigravity is preserved throughout: its GEMINI.md contextFileName, .gemini/antigravity config home, the shared convertGeminiToolName/claudeToGeminiTools tool vocabulary, and the 'gemini' hookEvents dialect it declares. GEMINI.md retargeted as Antigravity's context file.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* chore(#1928): backfill changeset PR number (#1996)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* chore(#1928): drop Gemini CLI from issue templates (review nit)
Removes the sunset Gemini CLI runtime from the two GitHub issue-template
runtime lists that the removal PR missed, per @davesienkowski's review nit:
- feature_request.yml: 'Applicable runtimes' checkbox (a user could otherwise
request a feature for a runtime GSD no longer supports)
- bug_report.yml: 'Runtime' dropdown + the stale ~/.gemini/settings.json
retrieval-help line
Leaves the post-removal templates fully consistent with the Antigravity redirect.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add a Gemini CLI extension package so users can install, update, and
remove GSD through Gemini's own extension lifecycle and have it appear in
`gemini extensions list`:
gemini extensions install https://github.com/open-gsd/gsd-core
gemini extensions update gsd-core
gemini extensions uninstall gsd-core
gemini extensions link /path/to/gsd-core # dev
This mirrors the additive Claude Code plugin manifest (#766): a thin,
version-stamped manifest enforced by an in-repo drift test. The extension
ships the context-file payload (GEMINI.md), loaded into every Gemini
session; slash-command/agent/hook TOML projection into the extension is a
documented follow-up. The manual `npx gsd-core --gemini` installer (which
provides the /gsd:* commands) is unchanged — purely additive, no breaking
change.
- gemini-extension.json: name=binName, version tracks package.json,
description, contextFileName=GEMINI.md (minimal; no mcpServers — gsd
ships no MCP server)
- GEMINI.md: Gemini-session context payload
- package.json: add both artifacts to files[] so they publish
- CONTEXT.md: add "Gemini Extension Package" glossary entry
- docs: USER-GUIDE + install-on-your-runtime how-to
- tests/issue-775-gemini-extension.test.cjs: manifest validity, version
parity with package.json, contextFileName existence, files[] publication
Closes#775
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
