Update LangChain package README

[pranavjana]

Summary

• replace the LangChain package README with updated docs for Search, Fetch, Web Agent, and Browser Session
• clarify tool inputs, JSON string returns, optional agent dependencies, LangGraph streaming, and Web Agent proxy behavior
• bump langchain-tinyfish to 0.1.1 so the PyPI publish workflow can upload a new release

Notes

• PyPI long description comes from langchain/README.md via langchain/pyproject.toml
• langchain-publish.yml runs on main pushes that touch langchain/** and skips existing package versions

Testing

• python3.11 metadata parse: langchain-tinyfish 0.1.1 README.md
• git diff --check

Full local lint/build not run: ruff and python build module are not installed in this environment.

[coderabbitai]

📝 Walkthrough

Walkthrough

langchain/README.md was largely rewritten to document the langchain-tinyfish package as four distinct LangChain tools: Search, Fetch, Web Agent automation, and Browser sessions. The new content adds per-tool usage examples, supported-input tables, LangGraph streaming notes, TinyFishAPIWrapper shared configuration, stealth/proxy configuration, parallel and async usage examples, a "Resources" section, and updated support contact details and Discord link. The package version in langchain/pyproject.toml was bumped from 0.1.0 to 0.1.1.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Update LangChain package README' accurately reflects the primary change in the changeset—a comprehensive README rewrite for the LangChain package.
Description check	✅ Passed	The description directly relates to the changeset, covering the README documentation updates, version bump, and testing performed.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/langchain-docs

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@langchain/README.md`:
- Line 155: The model identifier in the example is set to "openai:gpt-5.5",
which is not a valid OpenAI model and will cause a runtime error. Replace this
non-existent model identifier with an actual available OpenAI model such as
"openai:gpt-4", "openai:gpt-4-turbo", or "openai:gpt-4o" to ensure the example
works correctly.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 02720415-2c5f-461e-a4b4-4d31d16f4dd0

📥 Commits

Reviewing files that changed from the base of the PR and between 1f47b14 and 872bcbc.

📒 Files selected for processing (2)

• langchain/README.md
• langchain/pyproject.toml

[simantak-dabhade]

LGTM