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v0.39.0

nilbuild/developer-roadmapv0.39.0Jun 19, 2026by github-actions[bot]

AI Summary

Adds VoyageAI rerank support and introduces breaking changes to the agent state machine and tool registration. Includes various bug fixes, dependency updates, and examples for streaming and image generation.

Key Highlights

  • VoyageAI rerank provider support
  • Breaking: Sans-IO AgentRun state machine refactoring
  • Breaking: Deterministic, duplicate-safe tool registration
  • Gemini mid-stream disruption token-counting example
  • Gemini Nano Banana image generation

Breaking Changes

  • AgentRun state machine changes (sans-IO)
  • Tool registration changes (deterministic/duplicate-safe)

New Features

  • VoyageAI rerank support
  • Gemini mid-stream disruption token-counting example
  • Gemini Nano Banana image generation
  • Cassette-backed AgentRun coverage

Full Release Notes

### Added

- *(providers)* add VoyageAI rerank support ([#1917](https://github.com/0xPlaygrounds/rig/pull/1917)) (by @sergiomeneses)
- *(agent)* [**breaking**] sans-IO AgentRun state machine; both agent loops become thin drivers ([#1899](https://github.com/0xPlaygrounds/rig/pull/1899)) (by @gold-silver-copper)

### Fixed

- correct possessive pronoun typo in CONTRIBUTING.md ([#1865](https://github.com/0xPlaygrounds/rig/pull/1865)) (by @abhicris) - #1865
- *(tool)* [**breaking**] deterministic, duplicate-safe tool registration + cassette tests ([#1913](https://github.com/0xPlaygrounds/rig/pull/1913)) (by @gold-silver-copper)

### Other

- *(deps)* bump uuid from 1.23.1 to 1.23.3 ([#1907](https://github.com/0xPlaygrounds/rig/pull/1907)) (by @dependabot[bot])
- *(deps)* bump lopdf from 0.40.0 to 0.41.0 ([#1877](https://github.com/0xPlaygrounds/rig/pull/1877)) (by @dependabot[bot])
- *(deps)* bump http from 1.4.0 to 1.4.2 ([#1909](https://github.com/0xPlaygrounds/rig/pull/1909)) (by @dependabot[bot])
- *(deps)* bump futures-timer from 3.0.3 to 3.0.4 ([#1908](https://github.com/0xPlaygrounds/rig/pull/1908)) (by @dependabot[bot])
- *(examples)* add Gemini mid-stream disruption token-counting example ([#1918](https://github.com/0xPlaygrounds/rig/pull/1918)) (by @gold-silver-copper)
- *(tool)* back ToolSet with an IndexMap instead of HashMap + order Vec ([#1916](https://github.com/0xPlaygrounds/rig/pull/1916)) (by @gold-silver-copper)
- de-flake tracing span tests and deepseek permission_control race ([#1915](https://github.com/0xPlaygrounds/rig/pull/1915)) (by @gold-silver-copper) - #1915
- *(agent)* cassette-backed AgentRun coverage against real Gemini turns ([#1901](https://github.com/0xPlaygrounds/rig/pull/1901)) (by @gold-silver-copper)
- Fix streaming reasoning history order ([#1898](https://github.com/0xPlaygrounds/rig/pull/1898)) (by @gold-silver-copper) - #1898
- Fix context document ordering ([#1893](https://github.com/0xPlaygrounds/rig/pull/1893)) (by @gold-silver-copper) - #1893
- Point ecosystem link to awesome-rig ([#1895](https://github.com/0xPlaygrounds/rig/pull/1895)) (by @gold-silver-copper) - #1895
- Add Gemini Nano Banana image generation ([#1889](https://github.com/0xPlaygrounds/rig/pull/1889)) (by @gold-silver-copper) - #1889

### Contributors

* @dependabot[bot]
* @abhicris
* @gold-silver-copper
* @sergiomeneses