v2.0.0

KeygraphHQ/shannonv2.0.0Jul 16, 2026by github-actions[bot]

AI Summary

Migrated the agent runtime from the Claude Agent SDK to the pi harness and removed Google Vertex AI support as a breaking change.

Key Highlights

Migrated agent runtime from Claude Agent SDK to pi harness
Removed Google Vertex AI as a supported provider
Removed related environment variables and configuration keys

Breaking Changes

Google Vertex AI is no longer a supported provider
Removed environment variables: CLAUDE_CODE_USE_VERTEX, ANTHROPIC_VERTEX_PROJECT, CLOUD_ML_REGION, GOOGLE_APPLICATION_CREDENTIALS
Removed config keys: use_vertex, vertex_project, cloud_ml_region
Removed CLAUDE_CODE_MAX_OUTPUT_TOKENS environment variable and max_output_tokens config key

New Features

Migrated agent runtime 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.