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feat(#1928): remove sunset Gemini CLI runtime, redirect to Antigravity (#1996)

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* 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>
This commit is contained in:
Tom Boucher
2026-07-04 13:32:51 -04:00
committed by GitHub
parent 55604e9124
commit 8f2ebbe9bf
91 changed files with 872 additions and 4528 deletions
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3
docs/reference/capability-matrix.md
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@@ -71,7 +71,7 @@ points.
| `tdd` | feature | full | `>=1.6.0` | `plan:pre`, `execute:post` | contribution, gate | first-party |
| `ui` | feature | full | `>=1.6.0` | `plan:pre`, `execute:wave:post`, `verify:post` | step, gate | first-party |
### Runtime capabilities (role: runtime) — 16
### Runtime capabilities (role: runtime) — 15
Runtime capabilities adapt GSD to a specific AI runtime or IDE — emitting
skills, agents, hooks configuration, and surface files for that host. They
@@ -88,7 +88,6 @@ emission), so their extension-point and hook-kind cells are `—`.
| `codex` | runtime | core | `>=1.6.0` | — | — | first-party |
| `copilot` | runtime | core | `>=1.6.0` | — | — | first-party |
| `cursor` | runtime | core | `>=1.6.0` | — | — | first-party |
| `gemini` | runtime | core | `>=1.6.0` | — | — | first-party |
| `hermes` | runtime | core | `>=1.6.0` | — | — | first-party |
| `kilo` | runtime | core | `>=1.6.0` | — | — | first-party |
| `kimi` | runtime | core | `>=1.6.0` | — | — | first-party |

32
docs/reference/host-integration-capability-matrix.md
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@@ -119,38 +119,6 @@ Documentation gaps:
---
## gemini
| Axis | Value | Source | Evidence |
|---|---|---|---|
| embeddingMode | declarative | https://github.com/google-gemini/gemini-cli/blob/main/packages/sdk/SDK_DESIGN.md | "This feature is currently not implemented. (repeated for both extension and subagent SDK APIs; all actual integration is via files: TOML com" |
| commandSurface | slash-toml | https://github.com/google-gemini/gemini-cli/blob/main/docs/cli/custom-commands.md | "Custom commands in Gemini CLI are defined in TOML format with the .toml file extension … Commands are invoked as slash commands in the CLI." |
| modelMode | passive | https://github.com/google-gemini/gemini-cli/blob/main/docs/hooks/reference.md | "BeforeModel Hook: Fires before sending a request to the LLM … hookSpecificOutput.llm_request (object) — An object that overrides parts of th" |
| hookBus | host | https://github.com/google-gemini/gemini-cli/blob/main/docs/hooks/reference.md | "Hooks function as host-fired events … The CLI fires events at predetermined lifecycle points [BeforeAgent, AfterAgent, BeforeTool, AfterTool" |
| stateIO | filesystem | https://github.com/google-gemini/gemini-cli/blob/main/docs/reference/configuration.md | "Local access by default with gitignore/geminiignore respect … Set to a boolean to enable or disable the sandbox" |
| transport | mcp | https://github.com/google-gemini/gemini-cli/blob/main/docs/tools/mcp-server.md | "Configure a Node.js MCP server using stdio … { \"mcpServers\": { \"nodeServer\": { \"command\": \"node\", \"args\": [\"dist/server.js\"] } } }" |
| runtime | node | https://github.com/google-gemini/gemini-cli/blob/main/docs/reference/configuration.md | "References to node-pty and child_process indicate JavaScript/Node.js execution environment" |
| dispatch.namedDispatch | true | https://github.com/google-gemini/gemini-cli/blob/main/docs/core/subagents.md | "Example of a custom subagent definition file (.gemini/agents/security-auditor.md) … name: security-auditor" |
| dispatch.nested | false | https://github.com/google-gemini/gemini-cli/blob/main/docs/core/subagents.md | "Each subagent operates in an isolated context loop … This isolation also includes recursion protection, preventing subag" |
| dispatch.maxDepth | 1 | https://github.com/google-gemini/gemini-cli/blob/main/docs/core/subagents.md | "To prevent infinite loops and excessive token usage, subagents cannot call other subagents. … The architecture enforces" |
| dispatch.background | undocumented | no authoritative doc — searched: https://github.com/google-gemini/gemini-cli/blob/main/docs/core/subagents.md, /google-gemini/gemini-cli (Context7 library) | — |
| dispatch.subagentToolkit | undocumented | no authoritative doc — searched: https://github.com/google-gemini/gemini-cli/blob/main/docs/core/subagents.md, /google-gemini/gemini-cli (Context7 library) | — |
| dispatch.backgroundDispatch | false | https://raw.githubusercontent.com/google-gemini/gemini-cli/main/docs/core/subagents.md | "To prevent infinite loops and excessive token usage, subagents cannot call other subagents." Additionally: "If a subagent is granted the `*` tool wildcard, it will still be unable to see or invoke ot |
Sources consulted:
- https://github.com/google-gemini/gemini-cli/blob/main/docs/cli/custom-commands.md
- https://github.com/google-gemini/gemini-cli/blob/main/docs/core/subagents.md
- https://github.com/google-gemini/gemini-cli/blob/main/docs/hooks/reference.md
- https://github.com/google-gemini/gemini-cli/blob/main/docs/reference/configuration.md
- https://github.com/google-gemini/gemini-cli/blob/main/docs/tools/mcp-server.md
- https://github.com/google-gemini/gemini-cli/blob/main/packages/sdk/SDK_DESIGN.md
- /google-gemini/gemini-cli (Context7 library)
Documentation gaps:
- dispatch.background — docs describe subagents as operating in isolated context loops but do not state whether they execute synchronously or asynchronously.
- dispatch.subagentToolkit — subagents have a configurable tool grant model but no single fixed value of 'full' or 'read-only' is stated as the architecture-level constraint.
---
## opencode

8
docs/reference/skill-mapping-matrix.md
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@@ -20,13 +20,12 @@ GSD ships skills (and commands/agents) as Markdown files under `commands/gsd/*.m
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).
## The 16-runtime matrix
## The 15-runtime matrix
| Runtime | Skill dest (global) | Prefix | Nesting | Loader | Converter | Notes |
|---------|---------------------|--------|---------|--------|-----------|-------|
| **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). |
| **codex** | `skills/` | `gsd-` | flat | unconfirmed → conservative | `convertClaudeCommandToCodexSkill` | TOML config (`configFormat: toml`). Description truncated to 180 chars (`metadata.short-description`). `sandboxTier: codex-agent-sandbox`. |
| **gemini** | — *(no skills kind)* | — | — | — | — | Commands-only (TOML `.toml` in `commands/gsd`). No skill surface; extension model has no `skills` field (C1: N/A). |
| **opencode** | `skills/` | `gsd-` | flat | recursive (`**` glob) | `convertClaudeCommandToOpencodeSkill` | XDG config home. Shares the opencode-family converter entry point (`convertClaudeCommandToOpencodeFamilySkill`). Also ships `command` (singular) commands. |
| **kilo** | `skills/` | `gsd-` | flat | recursive (`**` glob) | `convertClaudeCommandToKiloSkill` | OpenCode fork; same `**` glob loader. `permissionWriter: kilo`. Also ships `command` commands. |
| **cursor** | `skills/` | `gsd-` | flat | recursive | `convertClaudeCommandToCursorSkill` | Also ships flat `commands/` via `convertClaudeCommandToCursorCommand`. `configFormat: none`. |
@@ -43,7 +42,7 @@ For the transform each converter applies, see [ADR-1593 §3 — converter transf
### Structural facts
- **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).
- **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).
- **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).
- **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).
- **Three runtimes share `convertClaudeCommandToClaudeSkill`** (claude, qwen, hermes). The converter branches on the `runtime` arg for per-runtime branding (Hermes `version:`, Qwen `priority:`).
@@ -66,14 +65,13 @@ Per [ADR-1593 §5](../adr/1593-skill-mapping-converter-methodology.md#5-plugin--
| Runtime | Provision model | Consumption model | Outcome |
|---------|-----------------|-------------------|---------|
| **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)** |
| **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** |
| **codex** | **N/A** — no plugin/extension manifest model. Uses `AGENTS.md` + TOML via file-copy install. | **N/A** — same rationale. | **C2: N/A** |
| **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** |
| **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** |
| **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** |
| **kimi** | **N/A** — special `kimi-agents` kind but no plugin/extension manifest. File-copy install only. | **N/A** — same rationale. | **C6: N/A** |
**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.
**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.
> **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.