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v2.0.0

mui/base-uiv2.0.0Jul 16, 2026by github-actions[bot]

AI Summary

This release migrates the agent runtime from the Claude Agent SDK to the pi harness and removes support for Google Vertex AI, requiring users to switch to alternative providers like Anthropic or AWS Bedrock.

Key Highlights

  • Agent runtime migrated from Claude Agent SDK to pi harness.
  • Google Vertex AI support has been completely removed.
  • Numerous environment variables and configuration keys related to Vertex AI and output tokens have been removed.
  • Users must migrate to Anthropic, AWS Bedrock, or a custom Anthropic-compatible base URL.

Breaking Changes

  • Google Vertex AI is no longer a supported provider.
  • Environment variables `CLAUDE_CODE_USE_VERTEX`, `ANTHROPIC_VERTEX_PROJECT`, `CLOUD_ML_REGION`, and `GOOGLE_APPLICATION_CREDENTIALS` are removed.
  • Configuration keys `use_vertex`, `vertex_project`, and `cloud_ml_region` are removed.
  • Environment variable `CLAUDE_CODE_MAX_OUTPUT_TOKENS` is removed.
  • Configuration key `max_output_tokens` is removed.

New Features

  • Agent runtime migration from Claude Agent SDK to pi harness.

Full Release Notes

# [2.0.0](https://github.com/KeygraphHQ/shannon/compare/v1.9.0...v2.0.0) (2026-07-16)


### Features

* **worker:** migrate agent runtime from Claude Agent SDK to pi harness ([#389](https://github.com/KeygraphHQ/shannon/issues/389)) ([5ff40f8](https://github.com/KeygraphHQ/shannon/commit/5ff40f8c6f694a5b50753b5e46ba061f88d0c6d6)), closes [#356](https://github.com/KeygraphHQ/shannon/issues/356) [#377](https://github.com/KeygraphHQ/shannon/issues/377) [#383](https://github.com/KeygraphHQ/shannon/issues/383) [#388](https://github.com/KeygraphHQ/shannon/issues/388)


### BREAKING CHANGES

* **worker:** Google Vertex AI is no longer a supported provider. The
CLAUDE_CODE_USE_VERTEX, ANTHROPIC_VERTEX_PROJECT, CLOUD_ML_REGION, and
GOOGLE_APPLICATION_CREDENTIALS environment variables, along with the
use_vertex, vertex_project, and cloud_ml_region config.toml keys, are
removed. Vertex users must switch to Anthropic, AWS Bedrock, or a custom
Anthropic-compatible base URL.

The CLAUDE_CODE_MAX_OUTPUT_TOKENS environment variable and the
max_output_tokens config.toml key are also removed.