3.0.0b4

What's Changed

Optimizers

• Fixes for MIPRO: Don't fail silently on bootstrapping! by @okhat in #8548
• skip unhashable module histories for mipro program proposer by @arnavsinghvi11 in #8572
• Update Arbor GRPO Integration by @Ziems in #8609
• Remove user confirmation from MiproV2 by @TomeHirata in #8552

Adapters & Tools

• fix(dspy): Fix MCP tool conversion when schema has no input params by @tvdaptible in #8566
• Explicitly mark the end of streaming by @chenmoneygithub in #8587
• faster json parsing for images in chatadapter by @jmhb0 in #8596
• Use json mode for serialization by @TomeHirata in #8605
• Custom BAMLAdapter to improve structured outputs by @prrao87 in #8614

LMs & Modules

• Mark gpt-5 as reasoning model by @olesyash in #8620
• Fix infinite growing trace and add tests by @chenmoneygithub in #8607
• Litellm logging management by @chenmoneygithub in #8619
• nit: fix "poorly-design" by @danielsparing in #8622
• remove history and callbacks from module saving by @arnavsinghvi11 in #8599
• update deduplicate by @apieum in #8623

Maintenance

• Increment python version for pre-commit by @TomeHirata in #8602
• Run the typos tool against the codebase by @kurtmckee in #8560
• Fix incorrect build-system requirements by @kurtmckee in #8558
• Vendor Hasher class from datasets library in order to remove larger dependency by @BenMcH in #8621

New Contributors

• @weklund made their first contribution in #8554
• @vakinapalli made their first contribution in #8569
• @tvdaptible made their first contribution in #8566
• @jmhb0 made their first contribution in #8596
• @olesyash made their first contribution in #8620
• @kurtmckee made their first contribution in #8560
• @prrao87 made their first contribution in #8614
• @danielsparing made their first contribution in #8622
• @apieum made their first contribution in #8623

Full Changelog: 3.0.0b3...3.0.0b4