CLI to CLI

This is the core workflow Portal already supports well. If someone asks what Portal can do today, this is the answer.

Step 1: prepare the receiver

On the destination machine, run:

portal receive

At this point the receiver is listening, starts broadcasting a discovery beacon, and waits for a TCP connection.

Important receiver preconditions from the code:

• the receiver needs a username in config
• the receiver needs a port, either from --port or from config
• Portal generates a fresh session node ID for each receive session

Step 2: identify the receiver

In discovery mode, the receiver shares their username with the sender. The username is stored in config and the code appends @portal automatically during setup if the suffix is missing.

That means users will usually look like this:

spectra@portal

The sender listens for UDP multicast beacons until it finds that exact username.

Step 3: send the payload

On the sending machine, run:

portal send --to <username> <path>

This is the normal path for local-network transfers. If no path is provided, the sender can open the interactive picker instead.

If the payload includes directories, -r is required. Otherwise the sender errors immediately rather than guessing what you meant.

Step 4: verify identity

Portal’s discovery flow includes receiver identity verification, and this is more concrete than a vague trust check.

What actually happens:

1. discovery finds a beacon containing the receiver’s username, TCP port, and node ID
2. the sender opens a TCP connection
3. the receiver sends its claimed node ID over that connection
4. the sender compares it to the beacon node ID
5. the transfer aborts if they do not match

That is why discovery mode is the recommended default.

Step 5: send the manifest and transfer note

Before the file stream begins, the sender builds a global transfer manifest containing:

• total file count
• total directory count
• total bytes
• whether compression is enabled
• sender username
• an optional transfer description

The receiver reads that manifest first, then prints a short summary before the stream starts.

Direct IP fallback

If you already know the destination address and port, you can bypass discovery:

portal send --address <ip> --port <port> <path>

This is faster to reason about in some environments, but it is not equivalent to discovery mode.

What you lose:

• no discovery-driven lookup
• no node-ID verification step

When to use each mode

Use discovery mode when:

• both devices are on the same network
• you want the friendlier default flow
• you care about identity confirmation

Use direct IP mode when:

• you already know the exact address and port
• discovery is blocked or unreliable on your network
• you are optimizing for a controlled manual setup