* 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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Tom Boucher
@@ -20,13 +20,12 @@ GSD ships skills (and commands/agents) as Markdown files under `commands/gsd/*.m
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For the transform each converter applies, see [ADR-1593 §3 — converter transform-contract categories](../adr/1593-skill-mapping-converter-methodology.md#3-the-converter-transform-contract-categories).
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## The 16-runtime matrix
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## The 15-runtime matrix
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| Runtime | Skill dest (global) | Prefix | Nesting | Loader | Converter | Notes |
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|---------|---------------------|--------|---------|--------|-----------|-------|
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| **claude** | `skills/` | `gsd-` | flat | one-level (reverted from nested, #924) | `convertClaudeCommandToClaudeSkill` | Local scope ships commands+agents only (no `skills` kind). Plugin manifest (ADR-766) ships skills via build-generated `skills/` dir (Phase B-provide, PR #1597, merged). |
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| **codex** | `skills/` | `gsd-` | flat | unconfirmed → conservative | `convertClaudeCommandToCodexSkill` | TOML config (`configFormat: toml`). Description truncated to 180 chars (`metadata.short-description`). `sandboxTier: codex-agent-sandbox`. |
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| **gemini** | — *(no skills kind)* | — | — | — | — | Commands-only (TOML `.toml` in `commands/gsd`). No skill surface; extension model has no `skills` field (C1: N/A). |
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| **opencode** | `skills/` | `gsd-` | flat | recursive (`**` glob) | `convertClaudeCommandToOpencodeSkill` | XDG config home. Shares the opencode-family converter entry point (`convertClaudeCommandToOpencodeFamilySkill`). Also ships `command` (singular) commands. |
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| **kilo** | `skills/` | `gsd-` | flat | recursive (`**` glob) | `convertClaudeCommandToKiloSkill` | OpenCode fork; same `**` glob loader. `permissionWriter: kilo`. Also ships `command` commands. |
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| **cursor** | `skills/` | `gsd-` | flat | recursive | `convertClaudeCommandToCursorSkill` | Also ships flat `commands/` via `convertClaudeCommandToCursorCommand`. `configFormat: none`. |
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@@ -43,7 +42,7 @@ For the transform each converter applies, see [ADR-1593 §3 — converter transf
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### Structural facts
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- **All 14 skill-bearing runtimes use `prefix: "gsd-"`.** Two runtimes have no skills kind: Gemini (commands-only TOML) and Windsurf (emits `.windsurf/workflows/gsd-*.md` slash-command workflows instead — #1615).
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- **All 14 skill-bearing runtimes use `prefix: "gsd-"`.** One runtime has no skills kind: Windsurf (emits `.windsurf/workflows/gsd-*.md` slash-command workflows instead — #1615).
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- **Five runtimes nest** (cline, qwen, hermes, augment, trae) because their skill loaders scan one level deep — nesting drops nested concrete skills out of the eager top-level listing while keeping them readable by file path (the namespace-router contract, #69).
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- **Eight runtimes stay flat**: three because their loaders recurse (cursor, opencode, kilo — nesting saves nothing), two because nesting was reverted (claude — the Skill tool errors on unknown names rather than re-routing, #924; antigravity — `agy` scans only `skills/<name>/SKILL.md`, so nested sub-skills were unreachable, #1614), and three conservatively where the loader depth is unconfirmed (codex, copilot, codebuddy).
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- **Three runtimes share `convertClaudeCommandToClaudeSkill`** (claude, qwen, hermes). The converter branches on the `runtime` arg for per-runtime branding (Hermes `version:`, Qwen `priority:`).
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@@ -66,14 +65,13 @@ Per [ADR-1593 §5](../adr/1593-skill-mapping-converter-methodology.md#5-plugin--
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| Runtime | Provision model | Consumption model | Outcome |
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|---------|-----------------|-------------------|---------|
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| **claude** | `.claude-plugin/plugin.json` `"skills": "./skills/"` — build-generated dir (PR #1597, merged) | Sub-agent `skills:` preload + runtime `Skill` tool (PR #1261, merged) | **Implemented (Phase B)** |
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| **gemini** | **N/A** — `gemini-extension.json` supports `mcpServers` + `contextFileName` only; no `skills` field. Gemini CLI SDK lists skills as a future extension primitive (*"currently not implemented"*). | **N/A** — same rationale. | **C1: N/A** |
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| **codex** | **N/A** — no plugin/extension manifest model. Uses `AGENTS.md` + TOML via file-copy install. | **N/A** — same rationale. | **C2: N/A** |
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| **opencode / kilo** | **N/A** — no first-party plugin manifest. Recursive `skills/**/SKILL.md` glob loader scans the local config dir that `bin/install.js` writes to. | **N/A** — same rationale. | **C3: N/A** |
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| **cursor, copilot, windsurf, codebuddy** | **N/A** — IDE-based tools with no plugin skill-provision model. File-copy install only. | **N/A** — same rationale. | **C4: N/A** |
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| **cline, qwen, hermes, augment, trae, antigravity** | **N/A** — CLI tools with no plugin marketplace model. File-copy install only. | **N/A** — same rationale. | **C5: N/A** |
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| **kimi** | **N/A** — special `kimi-agents` kind but no plugin/extension manifest. File-copy install only. | **N/A** — same rationale. | **C6: N/A** |
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**Phase D (first-party packaging parity):** Complete. Claude Code's `.claude-plugin/plugin.json` is the only first-party manifest with a `skills` field (Phase B-provide, PR #1597). Gemini's `gemini-extension.json` is context-only (no skills field — C1 N/A). No other first-party packaging exists.
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**Phase D (first-party packaging parity):** Complete. Claude Code's `.claude-plugin/plugin.json` is the only first-party manifest with a `skills` field (Phase B-provide, PR #1597). No other first-party packaging exists.
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> **Rejected for all platforms:** reading another plugin's ephemeral/undocumented cache (e.g. Claude Code's `${CLAUDE_PLUGIN_ROOT}` / `~/.claude/plugins/cache`). The platform's native mechanism is the contract; cache-reading is a workaround, not a fix.
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