bug: Breaks AWS request signing.

[bulebuk]

OpenCode version

1.2.0

Plugin path

~/.config/opencode/plugins/opencode-context-cache.mjs

Expected behavior

Successful use of AWS Bedrock for model access.

Actual behavior

Model connection fails:

The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.
The Canonical String for this request should have been
'POST
/model/us.anthropic.claude-opus-4-6-v1/converse-stream
conversation_id:

Reproduction steps

1. Configure vanilla opencode with Bedrock.
2. Test a bedrock model.
3. Install context cache plugin.
4. Test bedrock model again.
5. Above error.

Relevant logs

[JackDrogon]

@bulebuk sorry，I dont' have aws bedrock subscription. If u can provide a test key, I can help to positioning issue.