* 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>
Resolved conflict in docs/reference/skill-mapping-matrix.md: kept next's Antigravity row (flat layout per #1614, doc-fixed by #1617) AND kept HEAD's Windsurf row (workflows layout per #1615). Also updated the Structural Facts section counts that the original #1615 PR left stale: '15 skill-bearing runtimes' → '14' (Windsurf no longer skill-bearing), 'Nine runtimes stay flat' → 'Eight', removed windsurf from the 'FLAT (unconfirmed)' row in the loader-verification table.
Resolves TBD entries in the skill-mapping matrix provision/consumption
table. All 15 non-Claude platforms assessed as N/A — none have a
documented plugin skill-provision model. File-copy install path
handles skill provision for all runtimes. Updates claude row to
reflect Phase B-provide merged status. Closes epic #1258 acceptance.
Closes#1600
Phase A of epic #1258. Adds the single authoritative ADR documenting
the per-runtime skill mapping + converter transform-contract catalog
that ADR-3660 (layout) and ADR-1508 (module ownership) each carry a
third of. Ships a companion reference matrix projecting all 16
runtimes from their capability descriptors.
- docs/adr/1593-skill-mapping-converter-methodology.md (new ADR)
- docs/reference/skill-mapping-matrix.md (new reference page)
- docs/adr/README.md (index row + status fixes: 3660, 1016 Proposed->Accepted)
- docs/adr/1016-runtime-capability-descriptor.md (header Proposed->Accepted;
the ConverterName enum is already code-enforced per ADR-857 phase 5e)
Doc-only. No code, no behavior change. Closes#1593.
