feat(opencode): add Antigravity CLI connector#31066
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Reuse an existing Google Antigravity CLI (`agy`) sign-in inside opencode and route inference through Google's Code Assist backend — no new login, no API keys. - Auth: read agy's OAuth session from the OS credential store — macOS Keychain, Linux Secret Service, Windows Credential Manager (CredRead); refresh using agy's own client, whose id/secret are read from the agy binary at runtime rather than shipped in source. - Model discovery: fetchAvailableModels (gated behind the `antigravity` User-Agent) returns the authoritative catalog with real display names and limits — Gemini, Claude Sonnet/Opus 4.6, and GPT-OSS. - Inference: rewrite @ai-sdk/google requests into the Code Assist v1internal envelope and unwrap responses (JSON + SSE). - Tool calls: synthesize and FIFO-pair the tool-call ids @ai-sdk/google drops for regular tools, which the backend needs to build Anthropic tool_use / OpenAI tool_calls — this is what makes Claude/GPT-OSS work. - Core: let a plugin's provider hook self-register a minimal catalog record when models.dev/config doesn't have it (ProviderHook gains an optional name). Verified end-to-end on macOS, Linux, and Windows. Closes anomalyco#28889.
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Issue for this PR
Closes #28889
Type of change
What does this PR do?
Adds a provider that reuses an existing Antigravity CLI (
agy) sign-in — Gemini, Claude, and GPT-OSS with no extra login or API key.fetchAvailableModels(only responds with theantigravityUser-Agent); rewrite@ai-sdk/googlerequests into thev1internalenvelope; unwrap responses (JSON + SSE)@ai-sdk/googleomits for regular tools — Gemini pairs by position, but the backend maps them to Anthropictool_use/ OpenAItool_calls, which need a matching id, so Claude/GPT-OSS otherwise failproviderhook (adds optionalnametoProviderHook), so it needs no config entry and survives catalog refreshessecurity), Linux Secret Service (secret-tool), Windows Credential Manager (CredReadvia PowerShell) — handling go-keyring's base64-on-macOS vs raw-JSON-on-Linux/Windows value formatsHow did you verify your code works?
generateContentwith tool calls, across Gemini, Claude Sonnet/Opus, and GPT-OSSbun test test/plugin/google-antigravity.test.ts(12 pass — envelope translation, SSE unwrap, fallback catalog, auth loader, tool-call id pairing)bunx tsc --noEmit -p tsconfig.jsoninpackages/opencodeScreenshots / recordings
Not a UI change.
Checklist