TIL
Use Tailwind v4 arbitrary values to get font sizes between text-sm and text-base
No utility class exists between text-sm (14px) and text-base (16px). Use text-[0.9375rem] for 15px or any size in between via arbitrary values.
1 min read
TIL
Today I Learned — Daily learnings
TIL
AgentCore boto3 clients are split between control plane and data plane
Mixing up bedrock-agentcore-control (create/delete) and bedrock-agentcore (session ops/code execution) gives you an AttributeError.
1 min read
TIL
AgentCore Runtime code configuration requires ZIP format on S3
Uploading a raw Python file to S3 for create-agent-runtime gives 'S3 object must be in .zip format' ValidationException. You must zip the code first.
1 min read
TIL
AgentCore Runtime InvokeAgentRuntimeCommand says Stateless but the filesystem persists within a session
The docs say 'Stateless between commands' but the filesystem is actually shared within a session. Only shell history and environment variables are reset.
1 min read
TIL
AgentCore Runtime code config entryPoint rejects 'python3 main.py' — just use ['main.py']
Setting entryPoint to ['python3', 'main.py'] in codeConfiguration gives 'Invalid entrypoint value' error. For Python runtimes, pass only the filename with .py extension like ['main.py'].
1 min read
TIL
agentcore deploy X-Ray ValidationException is harmless
agentcore deploy emits 'X-Ray Delivery Destination is supported with CloudWatch Logs as a Trace Segment Destination' during memory creation, but the runtime phase auto-configures it.
1 min read
TIL
agentcore CLI Direct Code Deploy requires uv
agentcore configure with Direct Code Deploy fails with 'Direct Code Deploy deployment unavailable (uv not found)'. Fix with pip install uv — not mentioned in the official docs.
1 min read
TIL
AgentCore Policy rejects Cedar permit without conditions as Overly Permissive
Creating a Cedar permit without a when clause in Bedrock AgentCore Policy fails with CREATE_FAILED due to FAIL_ON_ANY_FINDINGS automated reasoning.
1 min read
TIL
AgentCore Gateway and Policy Engine have opposite naming rules
Bedrock AgentCore Gateways only allow hyphens while Policy Engines only allow underscores. Using the same prefix for both causes ValidationException.
1 min read
TIL
Two environment variables are all you need to make AWS CLI follow XDG Base Directory
AWS CLI defaults to ~/.aws/, but setting AWS_CONFIG_FILE and AWS_SHARED_CREDENTIALS_FILE is enough to make it XDG-compliant.