chore: initial commit

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+# sftp_testing
+
+A scratch project for troubleshooting and debugging the behavior of parallel SSH/SFTP connections to target machines using the `ssh2-sftp-client` npm library.
+
+## What it does
+
+`index.ts` spawns 6 worker threads concurrently. Each worker connects to an SFTP server, uploads `test.txt` as `<runIndex>-test.txt`, then deletes the remote file. The goal is to reproduce and inspect issues that arise when many connections are opened against a target host at the same time.
+
+## Setup
+
+```bash
+npm install
+cp config.example.json config.json
+```
+
+Then fill in `config.json` with real credentials. Multiple profiles are supported; pass a profile name as the first CLI argument (defaults to `default`):
+
+```bash
+npx tsx index.ts
+npx tsx index.ts ftp.stevanfreeborn.com
+```
+
+## Notes
+
+- Connection settings (host, port, username, password) are loaded from `config.json`.
+- Each worker runs the same upload/delete sequence independently against the same target.
+- On success, the main thread prints: `All workers completed execution successfully.`