* 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>
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GSD Core — Antigravity CLI context
Gemini CLI was sunset by Google on 2026-06-18 and is no longer served for free/Pro/Ultra tiers. Antigravity CLI is its official successor, and this file is the context Antigravity reads automatically (its
contextFileNameisGEMINI.md, inherited from the shared Gemini 3 backend).
This context gives Antigravity the operating context for GSD Core, a meta-prompting, context-engineering, and spec-driven development system for AI coding agents.
What GSD is
GSD turns a vague goal into shipped software through an explicit,
resumable workflow: explore → plan → execute → verify → ship. Work is
organised into milestones and phases under a .planning/ directory, with each
phase carrying a SPEC, a PLAN, and verification criteria. The system favours
small, atomic, test-backed commits and keeps durable context in version-tracked
files rather than in the conversation.
The slash commands (installed separately)
This file ships only the context above — not the slash commands. To install the
/gsd-*command set, agents, and hooks into~/.gemini/antigravity/, run the dedicated installer:npx gsd-core --antigravity --globalThe commands below are available only once that installer has run.
If you have installed the gsd commands, the workflow is driven by these /gsd-*
slash commands (Antigravity registers gsd's commands under a hyphenated
namespace):
/gsd-new-project— initialise a project and gather deep context./gsd-progress— the unified situational command: check progress, advance the workflow, or dispatch a freeform intent./gsd-plan-phase <N>— produce a detailed phase plan with a verification loop./gsd-execute-phase <N>— execute a phase's plans with wave-based parallelism./gsd-verify-work— validate built features through conversational UAT./gsd-ship— open a PR, run review, and prepare for merge./gsd-help— list every available command.
Working with GSD
- Treat
.planning/as the source of truth for project state — read it before acting, and keep it current as work progresses. - Prefer the smallest change that satisfies the phase's verification criteria.
- Run the project's tests and linters before declaring a phase done.
- When unsure what to do next, and the gsd commands are installed,
/gsd-progressis the situational entry point.
Learn more: https://github.com/open-gsd/gsd-core