docs: Update OCI provider to link to samples directory

[Federico Kamelhar (fede-kamel)]

Summary

Update the OCI provider documentation to link to samples/ instead of tutorials/. This aligns with the samples directory being added to langchain-oracle (see oracle/langchain-oracle#152).

Changes

• Rename "Tutorials" section to "Samples"
• Update all GitHub links from /tutorials/ to /samples/
• No content changes, just link updates

Related

• Add samples directory with code examples oracle/langchain-oracle#152 - Add samples directory with code examples

[github-actions]

❌ Import check failed

This PR contains imports from langchain_core that should be imported from langchain instead.

Detailed issues

Analyzing diff for import issues...
 Found 10 import issues:

File: src/oss/python/integrations/providers/oci-tutorials/building-agents.mdx
Line: 37
Issue: Import from langchain.tools instead of langchain_core.tools
Current:   from langchain_core.tools import tool
Suggested: from langchain.tools import tool
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/building-agents.mdx
Line: 76
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage
Suggested: from langchain.messages import HumanMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/getting-started.mdx
Line: 191
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage, AIMessage, SystemMessage
Suggested: from langchain.messages import HumanMessage, AIMessage, SystemMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/tool-calling.mdx
Line: 13
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage, ToolMessage
Suggested: from langchain.messages import HumanMessage, ToolMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/tool-calling.mdx
Line: 14
Issue: Import from langchain.tools instead of langchain_core.tools
Current:   from langchain_core.tools import tool
Suggested: from langchain.tools import tool
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/vision-multimodal.mdx
Line: 105
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage
Suggested: from langchain.messages import HumanMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/vision-multimodal.mdx
Line: 140
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage
Suggested: from langchain.messages import HumanMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/vision-multimodal.mdx
Line: 168
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage
Suggested: from langchain.messages import HumanMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/vision-multimodal.mdx
Line: 214
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage
Suggested: from langchain.messages import HumanMessage
--------------------------------------------------------------------------------
File: src/oss/python/integrations/providers/oci-tutorials/vision-multimodal.mdx
Line: 248
Issue: Import from langchain.messages instead of langchain_core.messages
Current:   from langchain_core.messages import HumanMessage
Suggested: from langchain.messages import HumanMessage
--------------------------------------------------------------------------------

 Found 10 import issues that need to be fixed.

Why this is a problem

The langchain package re-exports many modules and classes from langchain_core. When possible, imports should use langchain instead of langchain_core for:

• Better user experience (single import source)
• Consistency across documentation
• Reduced cognitive load for users

How to fix

Replace the imports as suggested above. For example:

• ❌ from langchain_core.messages import HumanMessage
• ✅ from langchain.messages import HumanMessage

🤖 Automated check

This check is based on the latest analysis of langchain re-exports from langchain_core.