Fix Import Inconsistencies and Enhance Validation

[kovtcharov]

Summary

Fixes breaking change from commit 77df07b where documentation showed incorrect import paths after LLM client refactor. Expands import validation from 4 to 31 tests to prevent future issues.

Problem

After the LLM client refactor (Jan 15), documentation showed:

from gaia.llm.llm_client import LLMClient  # ❌ ModuleNotFoundError

But the correct import is:

from gaia.llm import LLMClient  # ✅ Works

This remained undetected for 4 days, causing user confusion.

Changes

Documentation (6 files)

• Fixed import examples in SDK docs, API reference, and playbooks
• All examples now use canonical from gaia.llm import X pattern

Code (5 files)

• Added VLMClient export to src/gaia/llm/__init__.py
• Updated 3 internal files to use canonical imports
• Created src/gaia/agents/blender/__init__.py to properly export BlenderAgent
• Fixed 6 Pylint warnings in Blender agent

Testing (1 file)

• Enhanced util/lint.ps1 with 31 comprehensive import tests (up from 4)
• Tests all public SDK exports: LLM, Chat, RAG, Agents, Database, Utils
• All imports validated on every CI run

Impact

• ✅ Users following docs will no longer get import errors
• ✅ Breaking changes caught in < 5 minutes (was 4 days)
• ✅ 7.5x more import coverage (31 vs 4 tests)

Test Results

✅ ALL QUALITY CHECKS PASSED
✅ All 31 imports working
✅ Code formatting passed
✅ Import sorting passed
✅ Pylint passed
✅ Flake8 passed

[kovtcharov]

@claude review this PR.

[github-actions]

Claude finished @kovtcharov's task —— View job

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PR Review: Fix Import Inconsistencies and Enhance Validation

Overall Assessment: Approved ✅

This is a well-structured PR that addresses a real user-facing issue (broken import documentation) and significantly improves the project's ability to detect future import regressions.

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Summary

Category	Files	Assessment
Documentation	6	🟢 Clean fixes
Code	5	🟢 Good improvements
Testing	2	🟢 Comprehensive expansion

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Documentation Changes 🟢

All 6 documentation files now use the canonical import pattern:

• from gaia.llm import LLMClient (was from gaia.llm.llm_client import LLMClient)
• from gaia.llm import VLMClient (was from gaia.llm.vlm_client import VLMClient)

Files updated:

• docs/playbooks/emr-agent/part-1-getting-started.mdx
• docs/sdk/api-reference.mdx
• docs/sdk/examples.mdx
• docs/sdk/sdks/llm.mdx
• docs/sdk/sdks/vlm.mdx
• docs/spec/file-change-handler.mdx

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Code Changes 🟢

1. New VLMClient export (src/gaia/llm/__init__.py:8)

from .vlm_client import VLMClient
__all__ = ["create_client", "LLMClient", "VLMClient", "NotSupportedError"]

Good addition - ensures from gaia.llm import VLMClient works.

2. New BlenderAgent module (src/gaia/agents/blender/__init__.py)

from gaia.agents.blender.agent import BlenderAgent
__all__ = ["BlenderAgent"]

Correct pattern - matches other agent packages.

3. Blender agent cleanup (src/gaia/agents/blender/agent.py)

• Removed unused f-string prefix on system prompt (line 87)
• Renamed private functions with _ prefix (_get_object_info, _delete_object, _execute_blender_code, _diagnose_scene)

These are good Pylint fixes.

4. Internal import updates

• src/gaia/agents/emr/agent.py:328 - Uses canonical from gaia.llm import VLMClient
• src/gaia/agents/emr/cli.py:639 - Same
• src/gaia/rag/sdk.py:435 - Same

5. Code style cleanup
Several files had string concatenation reformatted for consistency (multiline strings now joined inline). These are non-functional changes but improve readability.

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Testing Changes 🟢

Import test expansion (util/lint.py and util/lint.ps1)

The import validation expanded from 4 to 31 tests:

Category	Tests Added
LLM package	5 (LLMClient, VLMClient, create_client, NotSupportedError, module)
Chat SDK	6 (ChatSDK, ChatConfig, ChatSession, ChatResponse, quick_chat, module)
RAG SDK	4 (RAGSDK, RAGConfig, quick_rag, module)
Base Agent	4 (Agent, MCPAgent, tool, module)
Specialized Agents	7 (ChatAgent, CodeAgent, JiraAgent, DockerAgent, BlenderAgent, MedicalIntakeAgent, RoutingAgent)
Database	2 (DatabaseAgent, DatabaseMixin)
Utilities	2 (FileWatcher, FileWatcherMixin)

The test structure also improved:

• Added Optional flag support for graceful handling of optional dependencies
• Better error message extraction and display
• Consistent output format between lint.py and lint.ps1

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Minor Observations

🟡 Non-issue: The Blender agent function renames (get_object_info → _get_object_info, etc.) are fine since these functions are commented out with # @tool and not registered in the tool registry.

🟢 Good practice: The PR maintains parity between lint.py (cross-platform) and lint.ps1 (Windows PowerShell), ensuring CI and local development have identical behavior.

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Verdict

Approve - This PR:

1. Fixes user-facing documentation bugs
2. Adds proper module exports for consistent imports
3. Significantly expands CI coverage to prevent future regressions
4. Includes appropriate Pylint fixes

The 7.5x increase in import test coverage (4 → 31) is a meaningful improvement for SDK stability.