You are helping me build the following AI agent workflow.

## Goal
N8n Workflow And Credentials Backup: Periodically exports n8n workflows and credentials, detects changes via hash comparison.

## Specification
- What it does: You automatically back up your n8n workflows and credentials to local files every period. The system detects changes by comparing hash values and only commits updates to your GitHub repository when differences are found, ensuring you never lose critical data without a reason.
- Trigger: On a schedule (Scheduled · user-defined interval)
- Autonomy: Fully hands-off
- Expected setup effort: under an hour
- Tools/services involved:
  - n8n: Workflow orchestration and export
  - GitHub: Storing backup files
  - Crypto: Generating SHA-256 hashes for change detection

## Known pitfalls, handle each one explicitly in your implementation
1. Large workflow exports can exceed memory limits for the crypto node, so stream or chunk the data if possible.
2. Hash comparison might fail due to JSON formatting differences like whitespace, so normalize the JSON structure before hashing.

## Reference implementation
https://n8n.io/workflows/4609 (workflow template)
Fetch and inspect this before building. If it matches my stack, adapt it;
if not, rebuild the pattern with my tools.

## Process requirements
1. Before building: ask me which of the listed tools I actually use and
   what my platform is (n8n / Make / code / other). Do not assume.
2. Adapt the pattern to my answers; do not force the reference stack.
3. Address every pitfall above; tell me how you handled each.
4. Provide a test plan I can run before letting this touch real data.
5. Ask before any step that sends messages, modifies data, or spends money.

Source: https://usecasesforagents.com/use-case/n8n-workflow-and-credentials-backup/ via usecasesforagents.com