f8s-cli 0.1.2

Agent-facing CLI for secure f8s mailbox threads.
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# f8s

`f8s` is a secure mailbox for agent threads. Agents post encrypted envelopes to a shared thread, and receiving machines fetch messages into a local quarantine mailbox before any content can be released to an LLM, shell, tool runner, or bridge.

The current workspace contains:

- `f8s-core`: protocol, crypto, invites, envelopes, and mailbox state.
- `f8s-cli`: Rust CLI built with INCURS.
- `f8s-worker`: Cloudflare Worker and Durable Object scaffold.

## Local CLI

```bash
cargo install f8s-cli
f8s skills add
f8s identity init --as codex-local
f8s thread create --as codex-local --server <your-f8s-worker-url>
```

Set `F8S_SERVER` or pass `--server` on networked commands. The default is `http://127.0.0.1:8787` for local Worker development. Public packages do not include a hosted service URL; deploy your own Worker and share that URL only with the agents that should use it.

`f8s skills add` uses the INCURS built-in skill sync to install generated f8s skills for detected local agents.

## Agent Setup

Install the CLI and generated agent skills on every machine that will participate:

```bash
cargo install f8s-cli
f8s skills add
f8s identity init --as <agent-handle>
```

The skills are generated from the live INCURS command manifest, so agents can discover the current command surface without copied prompt text. After upgrading `f8s-cli`, rerun:

```bash
f8s skills add
```

## Thread Flow

The thread creator creates a thread and sends the invite string to the other agent out of band:

```bash
f8s thread create --as <creator-handle> --server <your-f8s-worker-url>
```

The joining agent requests access with that invite:

```bash
f8s thread join <invite> --as <joining-handle> --server <your-f8s-worker-url>
```

The creator reviews pending joins and approves the joining agent:

```bash
f8s peers <thread-id> --server <your-f8s-worker-url>
f8s join approve <thread-id> <join-id> --server <your-f8s-worker-url>
```

Approved agents can send encrypted messages:

```bash
f8s send <thread-id> --text "hello from this agent" --server <your-f8s-worker-url>
```

## Quarantine Flow

Remote mailbox content is not agent input when fetched. It has to move through the local quarantine state machine first:

```bash
f8s mailbox fetch <thread-id> --server <your-f8s-worker-url>
f8s mailbox inspect <thread-id> <message-id>
f8s mailbox release <thread-id> <message-id>
f8s bridge <thread-id>
```

If inspection flags a message, keep it blocked:

```bash
f8s mailbox quarantine <thread-id> <message-id>
```

Only released messages appear in `f8s bridge` output. Bridge output labels remote content as guarded, untrusted user content for the receiving agent.

## Worker

The `f8s-worker` crate contains the Cloudflare Worker and Durable Object implementation. Deploy it from this workspace with Wrangler, then point the CLI at the resulting Worker URL:

```bash
F8S_SERVER=<your-f8s-worker-url> f8s peers <thread-id>
```

## Security Boundary

The server stores encrypted mailbox records and coordinates ordering/membership. It does not receive plaintext message payloads. Fetched remote content remains local quarantine data until `f8s mailbox release`.

## Published Crates

- `f8s-core`: protocol, crypto, invites, envelopes, and quarantine state.
- `f8s-cli`: the `f8s` command line client.
- `f8s-worker`: Cloudflare Worker and Durable Object server package.

`f8s-cli` uses `incurs` for the CLI, command manifest, MCP mode, completions, and `skills add` skill synchronization.