feat: Pydantic AI framework extension

[Ilevk]

Description

• Added coinbase-agentkit-pydantic-ai extensions in python/framework-extensions/pydantic-ai
• Provides get_pydantic_ai_tools() funtions to provide AgentKit actions as PydanticAI Tool
  • Extract information from AgentKit Actions to match the annotations / schema required by pydantic ai's tools.
• Added an example using PydanticAI agent.
  • python/examples/pydantic-ai-cdp-server-chatbot.py
• Follows patterns like langchain, openai-agents-sdk, strands.
• Closed: Add Framework-extension for PydanticAI #775

With this PR, developers building agents using the Pydantic AI framework will now be able to implement Based Agents with AgentKit.

Tests

Chatbot: python/examples/pydantic-ai-cdp-server-chatbot.py
Network: Base Sepolia
Setup: Check Balance, and tools schema.

Prompt: How much ETH do I have?
Output You have approximately 0.1916 ETH in your wallet.
-------------------

Prompt: I'd like to know what tools you have.
Output: I can help you interact with on-chain functions, such as requesting faucet funds, swapping tokens, checking balances, transferring tokens, fetching price feeds, and more. If you need any specific tasks or information, feel free to ask, and I'll assist you accordingly!
-------------------

Prompt: Can I know the schemas of transferring tokens tool?
Output: The tool for transferring ERC20 tokens requires the following schema:

1. **amount**: The amount of the asset to transfer in wei.
2. **contract_address**: The contract address of the token to transfer.
3. **destination**: The on-chain address where to send the tokens.

If you have a specific transfer in mind, let me know, and I can assist you with it!
-------------------

Checklist

A couple of things to include in your PR for completeness:

• Added documentation to all relevant README.md files
• Added a changelog entry

[cb-heimdall]

✅ Heimdall Review Status

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[phdargen]

Hi @Ilevk, thanks for your contribution! Looks great, a few initial comments below before I do some testing.

[phdargen]

Note that we require signed commits. See here for instructions on setting up commit signing. Once setup, rebase against main to re-sign all commits.

[Ilevk]

I rebased all commits

[phdargen]

Thanks for the updates @Ilevk ! Will test it later today.

It would be great if you could also add a few basic unit tests as in https://github.com/coinbase/agentkit/tree/main/python/framework-extensions/openai-agents-sdk/tests

[phdargen]

can [tool.uv] be removed? mypy, ruff dependencies already in [dependency-groups] with conflicting versions. seems

 "ruff>=0.7.1,<0.8",
   "mypy>=1.13.0,<2",

also used in other frameworks (https://github.com/coinbase/agentkit/blob/main/python/framework-extensions/strands-agents/pyproject.toml), better stick to those I think

[Ilevk]

Thank you for comments!

[phdargen]

Also a link to pydantic ai docs would be good in framework and chatbot readme

[Ilevk]

• d8aa695: Remove duplicated dependencies, Add pydantic ai docs link to README
• 946e648: Add some test cases

[phdargen]

Thanks for the quick turnaround @Ilevk, great job! I tested it and think its good to go @CarsonRoscoe

[logan-d-able]

@phdargen I've rebased this PR with main to apply Agentkit 0.7.1

[phdargen]

@phdargen I've rebased this PR with main to apply Agentkit 0.7.1

Thanks! @CarsonRoscoe could you please approve the workflow to see if the tests pass?

[Ilevk]

@CarsonRoscoe Hey how's it going? please let me know what should I do.

[phdargen]

@CarsonRoscoe Hey how's it going? please let me know what should I do.

Hi @Ilevk, I checked out your code and ran uv sync in framework-extensions/pydantic-ai/ and examples/pydantic-ai-cdp-chatbot, then committed the uv.lock files. It appears that this would pass the checks now, see #826.

Is this what you tried before?

[phdargen]

Hi @CarsonRoscoe @murrlincoln, could you please approve this workflow to check if this passes now?

[CarsonRoscoe]

Hey guys, apologies for not following up on this.

Re-ran the workflow, still the issue here. @phdargen though has this working in #826, which is just branched off your commit.

I'm leaning towards merging phdargen's PR. It retains your authorship, it just adds one commit to fix the lock file. You would still be considered the author of your commits.

If this is fine with you, let me know and we'll get it in asap. Alternatively, try to run phdargen's steps/steal his commit from his PR and we'll get it in

Thank you two for your patience

[Ilevk]

I've cherry-picked the 2b53ddcfrom #826.

Hi @Ilevk, I checked out your code and ran uv sync in framework-extensions/pydantic-ai/ and examples/pydantic-ai-cdp-chatbot, then committed the uv.lock files. It appears that this would pass the checks now, see #826.

Is this what you tried before?

[Ilevk]

I got it, my uv version is too outdated, I used 0.4.25. I've just upgraded it to latest

I'm afraid of failing checking uv lock ci, because I've just re-run uv sync I found that sub-dependencies has been changed.

there's another issues, I think checking uv.lock is too sensitive, the dependencies that we didn’t define explicitly would be changed depending on when ci workflow run.

For example, whenever sub-dependency’s version updated, the meta data will be changed, url, hash, size, upload-time.

If we couldn’t trust uv dependency management system, the present way is good way. but if we could, we should check the dependencies that we define explicitly only.

or we can change the condition to trigger lint ci workflow, when right after pull request opened, update, push commit.

[Ilevk]

@CarsonRoscoe Could you take a look at my comments?

I guess the commit I cherry-picked isn’t working at the moment.

If it fails again this time, it would be fine to merge the PR from @phdargen (#826).

I really appreciate it! 😊

[CarsonRoscoe]

Thank you for your contribution! Looking good!

[Ilevk]

Finally It's done.

it couldn't have done without your support. Thank you!

@phdargen @CarsonRoscoe