fix(kagent-adk/cli/test): fix "NotADirectoryError: [Errno 20] Not a directory: 'xxx/agent-card.json'"

[mozillazg]

Before

$ uv run cli.py test --task 'who are you' --filepath config.json 
...
NotADirectoryError: [Errno 20] Not a directory: 'config.json/agent-card.json'

After

$ uv run cli.py test --task 'who are you' --filepath ./
...
INFO:root:Starting KAgent
INFO:kagent.adk._a2a:
>>> User Query: who are you
...

[Copilot]

Pull Request Overview

Fix the NotADirectoryError in the test CLI by decoupling the agent config file path from the agent card path.

• Replace --filepath with explicit --agent-config and add --agent-card flags
• Open the two files directly instead of joining agent-card.json to the config path

---

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[EItanya]

Why this change? Why can't both files be in the same directory?

[mozillazg]

@EItanya

Why this change? Why can't both files be in the same directory?

They can be in the same directory. The issue is that --filepath currently points to the config.json file. The code then joins agent-card.json to that file path, producing /path/to/config.json/agent-card.json, which raises a NotADirectoryError. If you prefer, I can change --filepath to accept the config directory instead, and read both files from there.

[EItanya]

@EItanya

Why this change? Why can't both files be in the same directory?

They can be in the same directory. The issue is that --filepath currently points to the config.json file. The code then joins agent-card.json to that file path, producing /path/to/config.json/agent-card.json, which raises a NotADirectoryError. If you prefer, I can change --filepath to accept the config directory instead, and read both files from there.

Yes, let's do that

[mozillazg]

@EItanya

Why this change? Why can't both files be in the same directory?

They can be in the same directory. The issue is that --filepath currently points to the config.json file. The code then joins agent-card.json to that file path, producing /path/to/config.json/agent-card.json, which raises a NotADirectoryError. If you prefer, I can change --filepath to accept the config directory instead, and read both files from there.

Yes, let's do that

@EItanya DONE.