fix(langflow): document rootful workaround and remove duplicate .env.example

[sanafayyaz315]

Description

Fix two Langflow agent bugs found during full test run:

1. Podman rootless bind-mount error — make run can fail on macOS with statfs ... init-db.sh: operation not permitted due to rootless Podman not being able to bind-mount host files. Added a callout in the README with the podman machine set --rootful workaround.
2. Duplicate .env.example — local/.env.example was never used by any make target (make init copies the root .env.example). Removed the orphaned file to avoid confusion.

Jira Ticket

https://redhat.atlassian.net/browse/RHAIENG-5047
https://redhat.atlassian.net/browse/RHAIENG-5058

Testing

• make test passes (no tests for this agent)
• No testing required (documentation/config change only)

Checklist

• I have read CONTRIBUTING.md
• No .env or secret files are included in this PR
• All changes are within scope

Review Guidance

Two small changes — README diff and one deleted file.

Related PRs

None

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Enterprise

Run ID: 6f9a5491-0cf8-49d8-a6d2-037fc0a9f706

📥 Commits

Reviewing files that changed from the base of the PR and between a99e8c0 and 0d8e1bb.

📒 Files selected for processing (1)

• agents/langflow/simple_tool_calling_agent/README.md

✅ Files skipped from review due to trivial changes (1)

• agents/langflow/simple_tool_calling_agent/README.md

---

📝 Walkthrough

Walkthrough

Added a macOS-specific Podman troubleshooting note to the local README to fix a Podman bind-mount permission error during make run. Removed all example environment variable entries from the local .env.example.

Changes

macOS Podman Troubleshooting Documentation

Layer / File(s)	Summary
Troubleshooting note for Podman permission issue agents/langflow/simple_tool_calling_agent/README.md	Inserted lines describing a macOS-specific fix for statfs ... init-db.sh: operation not permitted when running make run: commands to stop the Podman machine, set it to --rootful, restart it, rerun make run, and an optional note on reverting the machine to rootless afterward.

Environment Configuration Cleanup

Layer / File(s)	Summary
Example environment variables removal agents/langflow/simple_tool_calling_agent/local/.env.example	Removed all example environment variable entries (approximately 11 lines), including PostgreSQL connection defaults, Langfuse admin password/encryption key placeholders, and the default Ollama model placeholder.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes both main changes: documenting the rootful workaround for Podman and removing the duplicate .env.example file.
Description check	✅ Passed	The description is directly related to the changeset, explaining both changes (Podman rootless bind-mount error documentation and removal of orphaned .env.example file) with context and references.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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

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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 `@agents/langflow/simple_tool_calling_agent/README.md`:
- Around line 100-108: Add a short security warning to the macOS Podman rootful
instructions and append the rollback commands to return Podman to rootless mode
after setup; specifically update the macOS section containing the podman
sequence (the block with "podman machine stop", "podman machine set --rootful",
"podman machine start", "make run") to include a one-line caution about elevated
privileges and then show the rollback sequence using "podman machine stop",
"podman machine set --rootful=false", and "podman machine start".

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

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

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Enterprise

Run ID: 1f8d767e-da15-4268-9aac-0d8156a21f2e

📥 Commits

Reviewing files that changed from the base of the PR and between 6be61b4 and a99e8c0.

📒 Files selected for processing (2)

• agents/langflow/simple_tool_calling_agent/README.md
• agents/langflow/simple_tool_calling_agent/local/.env.example

💤 Files with no reviewable changes (1)

• agents/langflow/simple_tool_calling_agent/local/.env.example

[tarun-etikala]

lgtm