deepagents

vlangchain-quickjs==0.2.0 scope: langchain-quickjs Breaking

This release includes 2 breaking changes for platform teams planning a safe upgrade.

Published 2d AI Agents & Assistants

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

ai deepagents langchain langgraph python typescript

ReleasePort's take

Light signal

editorial:auto 2d

langchain‑quickjs 0.2.0 removes the `skills_backend` capability and introduces a default `subagent` bridge.

Why it matters: Breaking change (severity 70) eliminates existing `skills_backend`; developers must update code paths before upgrading to avoid runtime failures.

Summary

AI summary

Updates ⚠ BREAKING CHANGES, Bug Fixes, and 0.2.0 across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Breaking	High	Removes `skills_backend` capability. Removes `skills_backend` capability. Source: llm_adapter@2026-06-12 Confidence: low	—
Feature	Medium	Adds default `subagent` bridge to langchain-quickjs. Adds default `subagent` bridge to langchain-quickjs. Source: llm_adapter@2026-06-12 Confidence: high	—

Full changelog

0.2.0 (2026-06-12)

⚠ BREAKING CHANGES

Add default subagent bridge (#3850)
Remove skills_backend (#3843)

Features

Add default subagent bridge (#3850) (85fd7c2)

Bug Fixes

Remove skills_backend (#3843) (1159e50)

Internal maintainers: @hntrl, @mdrxy

Breaking Changes

Removed `skills_backend` module.
Added default `subagent` bridge (observable change in runtime configuration).

View diff on GitHub

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About deepagents

Agent harness built with LangChain and LangGraph. Equipped with a planning tool, a filesystem backend, and the ability to spawn subagents - well-equipped to handle complex agentic tasks.

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Earlier breaking changes

vdeepagents-cli==0.2.0 `deepagents deploy` now targets Managed Deep Agents API; removes `deepagents dev`, `deepagents.toml`, and `--config`/`--dry-run` flags.