v1.50.0

What's Changed

• fix(llm): gate prompt_cache_key on provider support by @juanmichelini in #5328
• chore(deps): bump aiosqlite from 0.21.0 to 0.22.1 by @dependabot[bot] in #5298
• fix(condenser): never forget the leading SystemPromptEvent (#5148) by @juanmichelini in #5241
• fix(grayswan): guarantee system message first when history window drops system prompt (#5147) by @juanmichelini in #5240
• fix(condenser): split summarization prompt into system + user messages by @juanmichelini in #5143
• fix(agent-server): prepend system message to profile pre-flight ping (#5146) by @juanmichelini in #5239
• docs(agent): add docstrings for image helper functions by @BORAN002 in #4656
• fix(sdk): exclude boolean false from anyOf non-null type selection by @all-hands-bot in #4322
• docs: clarify scope for new AI providers by @neubig in #5313
• chore(ci): fix inaccurate timings and wording in stale workflow by @VascoSch92 in #4298
• chore(openapi): exempt extensible tool metadata by @neubig in #5286
• fix(condenser): preserve leading system prompt on hard context reset (#5149) by @juanmichelini in #5242
• fix(goal): split judge prompt into system + user messages (#5145) by @juanmichelini in #5238
• fix(sdk): tolerate null cache_creation_tokens in usage telemetry (minimax-m3 crash) by @juanmichelini in #5327
• refactor(sdk): centralize LLM call context by @neubig in #4159
• fix(sdk): resolve async response secrets outside the event loop by @neubig in #4967
• docs: refresh AGENTS.md guidance by @all-hands-bot in #5040
• fix(sdk): keep conversations alive when MCP startup fails by @onatozmenn in #5345
• fix(deps): bump anyio to 4.14.2 for CVE-2026-63374 by @neubig in #5361
• feat(client): own browser conversation event stream transport by @neubig in #5013
• feat(apps): manage optional backend processes by @neubig in #5270
• fix(ci): poll npm registry for typescript-client integrity in OpenHands bump by @juanmichelini in #5331
• feat(agent-server): register refresh-on-401 hook on managed-proxy LLMs by @aivong-openhands in #5222
• fix: surface LiteLLM budget denials without retry backoff by @ak684 in #5309
• Release v1.50.0 by @all-hands-bot in #5374

Full Changelog: v1.49.6...v1.50.0