Fix secrets bug: Convert strings to StaticSecret objects in RemoteConversation

[rbren]

Problem

Fixes a bug where string secrets passed to RemoteConversation.update_secrets() were causing 422 Unprocessable Entity errors. The server expects secrets to be wrapped in StaticSecret objects with a discriminated union format, but the client was sending plain strings.

Error:

HTTP request failed (422 Unprocessable Entity): 
{'detail': [{'type': 'union_tag_invalid', 'loc': ['body', 'secrets', 'GITHUB_TOKEN'], 
'msg': "Input tag 'str' found using kind_of() does not match any of the expected tags: 'LookupSecret', 'StaticSecret'", 
'input': 'ghp_...', 'ctx': {'discriminator': 'kind_of()', 'tag': 'str', 'expected_tags': "'LookupSecret', 'StaticSecret'"}}]}

Solution

• Fixed RemoteConversation.update_secrets() to automatically convert string secrets to StaticSecret objects using the existing _wrap_secret() helper function
• Enhanced payload serialization using model_dump(context={"expose_secrets": True}) to ensure proper format
• Maintains backward compatibility with both string and callable secret values

Changes

Core Fix

• File: openhands-sdk/openhands/sdk/conversation/impl/remote_conversation.py
• Method: update_secrets() (lines 635-656)
• Change: Convert strings to StaticSecret objects before sending to server

Before: {"API_KEY": "secret-value"}
After: {"API_KEY": {"kind": "StaticSecret", "value": "secret-value", "description": null}}

Enhanced Tests

• File: tests/sdk/conversation/remote/test_remote_conversation.py
• Enhancement: Added comprehensive assertions to verify payload format matches server expectations
• Coverage: Tests both string and callable secret values

Testing

• ✅ All existing tests pass (17/17 remote conversation tests)
• ✅ Pre-commit hooks pass (formatting, linting, type checking)
• ✅ Manual verification confirms strings are automatically converted to StaticSecret objects
• ✅ Backward compatibility maintained for both string and callable secrets

Impact

This fix resolves the 422 error when using RemoteWorkspace with string secrets, ensuring seamless integration with the server API while maintaining the existing user interface.

@rbren can click here to continue refining the PR

---

Agent Server images for this PR

• GHCR package: https://github.com/OpenHands/agent-sdk/pkgs/container/agent-server

Variants & Base Images

Variant	Architectures	Base Image	Docs / Tags
java	amd64, arm64	eclipse-temurin:17-jdk	Link
python	amd64, arm64	nikolaik/python-nodejs:python3.12-nodejs22	Link
golang	amd64, arm64	golang:1.21-bookworm	Link

Pull (multi-arch manifest)

# Each variant is a multi-arch manifest supporting both amd64 and arm64
docker pull ghcr.io/openhands/agent-server:558bdc6-python

Run

docker run -it --rm \
  -p 8000:8000 \
  --name agent-server-558bdc6-python \
  ghcr.io/openhands/agent-server:558bdc6-python

All tags pushed for this build

ghcr.io/openhands/agent-server:558bdc6-golang-amd64
ghcr.io/openhands/agent-server:558bdc6-golang_tag_1.21-bookworm-amd64
ghcr.io/openhands/agent-server:558bdc6-golang-arm64
ghcr.io/openhands/agent-server:558bdc6-golang_tag_1.21-bookworm-arm64
ghcr.io/openhands/agent-server:558bdc6-java-amd64
ghcr.io/openhands/agent-server:558bdc6-eclipse-temurin_tag_17-jdk-amd64
ghcr.io/openhands/agent-server:558bdc6-java-arm64
ghcr.io/openhands/agent-server:558bdc6-eclipse-temurin_tag_17-jdk-arm64
ghcr.io/openhands/agent-server:558bdc6-python-amd64
ghcr.io/openhands/agent-server:558bdc6-nikolaik_s_python-nodejs_tag_python3.12-nodejs22-amd64
ghcr.io/openhands/agent-server:558bdc6-python-arm64
ghcr.io/openhands/agent-server:558bdc6-nikolaik_s_python-nodejs_tag_python3.12-nodejs22-arm64
ghcr.io/openhands/agent-server:558bdc6-golang
ghcr.io/openhands/agent-server:558bdc6-java
ghcr.io/openhands/agent-server:558bdc6-python

About Multi-Architecture Support

• Each variant tag (e.g., 558bdc6-python) is a multi-arch manifest supporting both amd64 and arm64
• Docker automatically pulls the correct architecture for your platform
• Individual architecture tags (e.g., 558bdc6-python-amd64) are also available if needed

[openhands-ai]

Looks like there are a few issues preventing this PR from being merged!

• GitHub Actions are failing:
  • Run tests

If you'd like me to help, just leave a comment, like

@OpenHands please fix the failing actions on PR #1231 at branch `fix-secrets-staticSecret-conversion`

Feel free to include any additional details that might help me get this PR into a better state.

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