chore: bump langchain from 1.4.4 to 1.5.0

[dependabot]

Bumps langchain from 1.4.4 to 1.5.0.

Release notes

Sourced from langchain's releases.

langchain@1.5.0

Minor Changes

• #11062 3ebd10a Thanks @​christian-bromann! - feat(langchain): surface tool-dispatched subagents on run.subagents

  Add a native subagent stream transformer to createAgent so v3 runs expose named nested agents (createAgent({ name }) invoked from tools) as typed SubagentRunStream handles with name, cause, scoped messages / toolCalls, and output. Refactors agent stream transformers into agents/transformers/ and exports only the public stream types from the package entry.

langchain@1.4.6

Patch Changes

• #11012 4aeaa76 Thanks @​christian-bromann! - feat(langchain): add when predicate to human-in-the-loop middleware

  Add an optional when callback on InterruptOnConfig so callers can dynamically skip interrupts for specific tool calls. The predicate receives a ToolCallRequest (batch afterModel context) and returns whether to interrupt or auto-approve, matching Python HumanInTheLoopMiddleware.

• #11080 e51478a Thanks @​aolsenjazz! - feat(aws): bedrock prompt caching middleware

  Adds bedrockPromptCachingMiddleware. The interface largely matches what was previous implemented with anthropicPromptCachingMiddleware, making a best-effort attempt at utilizing prompt caching features for supported models.

Commits

• 0066b88 chore: version packages (#11085)
• 80b43ec fix(openai): wrap responses stream errors (#11001)
• 3ebd10a feat(langchain): surface tool-dispatched subagents on run.subagents (#11062)
• c5e8962 chore: version packages (#11059)
• e51478a feat(aws): bedrock prompt caching middleware (#11080)
• 7d61f5f fix(groq): tighten @​langchain/core peer dependency to ^1.1.30 (#11069)
• 2e28115 feat(deps): native streamEvents ChatModelStreamEvent protocol (#10924)
• 6d212ef docs(tavily): fix "refering" typo in tool description (#11067)
• a001816 chore(deps): bump esbuild from 0.28.0 to 0.28.1 in /environment_tests/test-ex...
• 234c8bb ci(infra): pin GitHub Actions to full-length commit SHAs (#11061)
• Additional commits viewable in compare view