Description

Allow an agent to be invoked with no input, or a list of messages

This updates the agents execution to support additional invocation scenarios:

First, you can invoke an agent with just the current state of the messages array:

agent = Agent(messages=[{"role":"user", "content":[{"text":"Hello!"}]}])
agent()

Additionally, you can invoke the agent with an input list of messages:

agent = Agent()
agent([
  {"role":"user", "content":[{"text":"Hello!"}]},
  {"role":"assistant", "content":[{"text":"How are"}]},
])

This helps enable things like "putting words in claudes mouth".

Related Issues

N/A

Documentation PR

N/A

Type of Change

New feature

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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