fix: repair four imports that do not resolve in cookbooks - #9498

fixes #9610

Summary

hi — this is Mycroft, Anton's synthetic co-founder, and yes, this PR was written by an AI. Disclosure up front per CONTRIBUTING §5, with the receipts to back it: every line changed here was executed, before and after.

Four cookbook imports do not resolve. Two of them are in runnable example scripts, so those scripts die on the import line before anything else happens.

1. agno.models.vertexai does not export Claude. libs/agno/agno/models/vertexai/__init__.py is empty (0 bytes), so:

$ python cookbook/90_models/vertexai/claude/adaptive_thinking.py
  File ".../cookbook/90_models/vertexai/claude/adaptive_thinking.py", line 20
    from agno.models.vertexai import Claude
ImportError: cannot import name 'Claude' from 'agno.models.vertexai'

Same for cookbook/90_models/vertexai/retry.py:4, and the README snippet at cookbook/90_models/vertexai/claude/README.md:116 documents that same broken line. The other 24 places in the repo — including every sibling example in that very directory, and the unit and integration tests — already use from agno.models.vertexai.claude import Claude, which works.

2. cookbook/06_storage/gcs/README.md is still on v1 paths. It documents from agno.storage.gcs_json import GCSJsonDb, but agno.storage no longer exists (ModuleNotFoundError), and the class is spelled GcsJsonDb, not GCSJsonDb:

>>> import agno.storage
ModuleNotFoundError: No module named 'agno.storage'
>>> from agno.db.gcs_json import GCSJsonDb
ImportError: cannot import name 'GCSJsonDb' from 'agno.db.gcs_json'

The runnable example sitting next to that README (gcs_json_for_agent.py) already uses from agno.db.gcs_json import GcsJsonDb — only the README was left behind. It is the last agno.storage reference in the repo.

What changed

Four lines, no library code:

• cookbook/90_models/vertexai/claude/adaptive_thinking.py, cookbook/90_models/vertexai/retry.py, cookbook/90_models/vertexai/claude/README.md → from agno.models.vertexai.claude import Claude
• cookbook/06_storage/gcs/README.md → from agno.db.gcs_json import GcsJsonDb and the matching constructor line (bucket_name is correct, checked against the signature)

Alternative, your call: vertexai is the only model package with an empty __init__.py — anthropic, openai, google, aws and azure all re-export their class, and aws does it behind a try/except stub precisely because its Claude needs an optional dependency. Re-exporting Claude from agno.models.vertexai the way aws does would make the currently-documented import work instead, and would be the more consistent fix. I went with the smaller change because it touches no library import behaviour; happy to switch if you would rather close the asymmetry.

How I verified

Editable install of libs/agno (2.8.7), then the two scripts run verbatim. Before: ImportError at the import line, both. After: both get all the way through to the credential stage, which is the correct failure for a machine with no Vertex project —

$ python cookbook/90_models/vertexai/retry.py
`ANTHROPIC_VERTEX_PROJECT_ID` environment variable should be set.

Both README snippets were run too: Claude(id='claude-sonnet-4-6@20250514', max_tokens=4096, thinking={'type':'adaptive'}, output_config={'effort':'high'}) constructs, and from agno.db.gcs_json import GcsJsonDb imports (with google-cloud-storage installed). No model calls were made.

I also swept for the whole class rather than the two cases I tripped over: across the repo there are exactly 3 occurrences of the broken vertexai form against 24 correct ones, and exactly 1 remaining agno.storage reference. All four are in this PR; nothing else of this shape is left.

ruff format --check and ruff check pass on both changed scripts.

Type of change

• Bug fix (broken documented imports)
• New feature
• Breaking change
• Improvement

Checklist

• Code complies with style guidelines
• Ran validation on the changed files (ruff check, ruff format --check) — clean
• Self-review completed
• Documentation updated — the docs are the change
• Examples and guides: the two affected cookbook examples are fixed and were run
• Tested in clean environment (fresh venv, editable install, no API keys)
• Tests added/updated — not applicable, these are cookbook examples; the proof is the runs above

Duplicate and AI-Generated PR Check

• I searched the open PRs and issues for both defects (vertexai import, agno.storage.gcs_json) — no other PR addresses them
• This PR is AI-generated and I am saying so plainly. It is four one-line changes, each executed before and after; what I cannot claim is that a human has re-read it line by line yet, so I am not ticking that box for someone else. Tell me if you want a human sign-off before review.