Genkit Files

What's Changed

• feat(js/plugins/google-cloud): implemented model armor middleware by @pavelgj in https://github.com/firebase/genkit/pull/3904
• feat(js): durable streaming for flows (experimental) by @pavelgj in https://github.com/firebase/genkit/pull/3770
• feat(js/ai): added support for model middleware that can manipulate the stream and context by @pavelgj in https://github.com/firebase/genkit/pull/3903
• chore(js/plugins): marked googleAI and vertexAI plugins from @genkit-ai/googleai and @genkit-ai/vertexai packages as deprecated in favour of @genkit-ai/google-genai package. by @ifielker in https://github.com/firebase/genkit/pull/3916
• fix(js/plugins/google-genai): do not enforce API key when apiKey is set to false by @pavelgj in https://github.com/firebase/genkit/pull/3933
• fix(genkit-tools/generate): Make model optional in GenerateActionOptions by @ssbushi in https://github.com/firebase/genkit/pull/3918
• feat(genkit-tools/mcp): Add README for Genkit MCP Server by @ssbushi in https://github.com/firebase/genkit/pull/3892
• feat(genkit-tools/mcp): Add genkit:init command with support for runtime tools by @ssbushi in https://github.com/firebase/genkit/pull/3891
• feat(js/core): DAP expansion: Dynamic Actions are now expanded in the action list by @ifielker in https://github.com/firebase/genkit/pull/3927

Dev UI changes

• fix: add reasoning token counts by @MichaelDoyle
• feat: Allow listing and running v2 tool actions by @shrutip90
• feat(eval): Metric summary in eval output header by @hritan
• chore: changed the default model to gemini-2.5-flash by @hritan
• feat: Support prompt evaluation (experiment) by @ssbushi
• fix: moved JSON preview toggle out of eval table by @hritan
• fix(run-new-evals): Fix bugs in re-run evaluation by @ssbushi
• fix(#3760): hide duration and token count badges when a new flow is running by @hugomurillomtz

Full Changelog: https://github.com/firebase/genkit/compare/v1.25.0...v1.26.0