270 lines
15 KiB
Markdown
270 lines
15 KiB
Markdown
# Run Sausage v3 on Citadel
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Use the web UI for conversations, passkeys, approvals, and secret entry. The host serves only JSON through `/api/`.
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**TL;DR:** Start a separate v3 world, create the SSH tunnel below, and open http://localhost:8080.
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The Nix package supplies the userland bundle, source tree, and enabled chat service.
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Keep the complete world folder between starts.
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## Build and start
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Run host commands from a checkout of the `v3` branch on Citadel.
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Use Nix with flakes. The package supplies the native Rust builder and its tools.
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The package entry point is:
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```sh
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nix run . -- init "$HOME/sausage-v3"
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nix run . -- run "$HOME/sausage-v3" </dev/null
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```
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The package sets `SAUSAGE_USERLAND` to its assembled bundle by default.
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For `init`, you can override it with `--userland BUNDLE` or the environment variable.
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`init` asks nothing and refuses an existing world. `run` refuses a folder without a world.
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A bundle contains `bin/`, `src/`, and the seeded `etc/` tree. It is not a world folder.
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Closing stdin only detaches the optional terminal console. The host and chat service continue.
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The source-tree bundle builder is:
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```sh
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nix develop -c nu userland/bundle.nu
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```
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It builds the world commands and creates `target/userland/bundle` by default.
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It snapshots committed source, not uncommitted edits.
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The source archive includes the complete `config/`, `skills/`, and `extensions/` directories.
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The bundle contains plain source files. `sausage init` creates their repository and its first commit on `main`.
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The world copier preserves symlinks, including dangling links in the source tree.
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A fresh development world needs no manual source copy.
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The bundle includes `/bin/web.wasm` and an enabled `/etc/systemd/system/web.service`.
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World init starts that service on `0.0.0.0:8080`.
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To change its address, edit `ExecStart` to add `--listen ADDR`, then run `systemctl restart web` inside the world.
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For a release host from the checkout:
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```sh
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nix develop -c cargo build -p sausage --release --locked
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```
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Cargo puts the host under `target/release/sausage`, unless `CARGO_TARGET_DIR` selects another directory.
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Use that binary with `init WORLD --userland BUNDLE`, then `run WORLD`.
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Use the repository's build slots and shared executor target directory for agent validation builds.
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Choose `$HOME/sausage-v3`, not the live v2 `~/world`.
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For the actual cutover, let v2 finish its work before you stop it.
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Do not run two production services. This guide does not stop or replace the deployed service.
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The host creates this layout:
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| Host path | Purpose |
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| --- | --- |
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| `sausage-v3/world/` | The world root `/`, including programs and editable source. |
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| `sausage-v3/host/` | Private host state, including credentials, harness storage, undo, and builder caches. |
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The host creates `/run` in memory. It generates `/proc` at runtime.
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It copies a bundle only when `WORLD/world` does not exist.
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A later run does not replace the world's tools, source, or config.
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Keep both `world/` and `host/` for recovery.
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The proxy key in `/etc/sausage/config.yaml` is the explicit exception to host-only secret storage.
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Sources: [`main.rs`](../host/src/main.rs), [`world.rs`](../host/src/world.rs),
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[`flake.nix`](../flake.nix), and [`bundle.nu`](../userland/bundle.nu).
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## Use the chat and stop the host
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The chat selects the configured standing agent by default. Choose another conversation from the list.
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Root #1 remains only as history. A standing-agent rename keeps the same conversation.
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The page polls for new entries and shows text, collapsed tools, and pending credential requests.
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Use **Send** to submit a message and **Stop** to stop the selected conversation's active turn.
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The pending-requests banner opens the approval view in the page. The host verifies the passkey assertion.
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Agents edit `/srv/www/index.html`. Each request reads the file fresh without a build or restart.
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The terminal console remains optional. Each nonempty console line submits a message to the standing conversation.
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Assistant text appears on stdout. This is not a shell or the v2 command dispatcher.
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Text such as `quit`, `help`, and `core.restart` has no special host meaning.
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Ask the agent to execute world commands when you need tools.
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Press **Ctrl-C** to stop the host. SIGTERM also requests orderly shutdown.
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EOF only detaches the console input. It does not stop the host.
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The web chat remains available after console input closes.
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After a crash, repeat the same start command with the same world folder.
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The host opens `host/harness.sqlite`, restores extensions, and resumes durable work.
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It does not replay the historical transcript into the console.
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It cannot restore ordinary process memory or reverse completed network effects.
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There is no automatic restart supervisor in this guide.
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Sources: [`input.rs`](../host/src/harness/input.rs), [`main.ts`](../host/js/main.ts),
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and [`harness/mod.rs`](../host/src/harness/mod.rs).
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## Reach the chat and approval pages
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The world web server listens on port 8080. The host opens no separate port.
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From the laptop, create one SSH tunnel:
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```sh
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ssh -N -L 8080:127.0.0.1:8080 citadel.vpn.surma.technology
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```
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Open **http://localhost:8080**. The first-passkey notice opens the Passkeys view.
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The host derives the passkey RP ID and origin from the browser request Origin header.
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For direct VPN access, passkeys need HTTPS because non-localhost HTTP lacks a secure context.
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Passkeys registered for localhost do not transfer to a production hostname.
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Do not expose the server to other people before the first registration.
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### Register, create an item, enter a secret
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1. Select **Register your first passkey** in the chat notice and choose a label.
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2. Complete the browser's passkey ceremony.
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3. Ask the agent to file an item creation request through `POST /cred/requests`.
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4. Select the request in the pending-requests banner and approve it with your passkey.
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5. Read the item's public metadata to find its item ID and stable field ID.
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6. Select **Enter a secret**, then select the item's secret field.
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7. Enter the secret in the blank form and complete its passkey ceremony.
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Until the first passkey exists, D53 permits unlocked decisions and first registration.
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After registration, decisions require a passkey. Additional registrations require an existing passkey.
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Secret entry requires a passkey even during bootstrap.
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The browser encrypts the secret before submission. The world never receives its plaintext.
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Do not paste secrets into chat or world files.
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There is no item editor or credential dashboard yet.
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Item creation uses `kind: "edit"` and a stable request key.
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Its request has `item: null`, `base_version: null`, and a `change` array.
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The creation operation is `{op: "create_item", config: ITEM}`.
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`ITEM` must contain the complete public item configuration, including its fields, rules, and transformation.
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Further edits add fields and rules. Inspect the typed operations before you construct those edits.
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Public reads use `/cred/items` and `/cred/items/ITEM_ID`.
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They do not return stored secret values.
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### Approve a request
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The agent or world UI obtains pending requests from `/harness/credential-requests` or `/cred/requests?state=pending`.
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Follow the `/#approve/ID` link on the web origin through the tunnel.
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Review the stored summary and public details, choose limits when applicable, then approve or deny.
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The world can file a request. It cannot approve its own request.
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For a manual Chrome check against a fresh world on port 8080, run:
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```sh
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node userland/web/browser-check.mjs
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```
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The script uses agent-browser and a CDP virtual authenticator. It registers a passkey and approves an item creation request.
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Set `AGENT_BROWSER_EXECUTABLE_PATH` if Chrome needs an explicit path.
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Sources: [`host API`](../host/src/api/README.md), [`credential views`](../userland/web/credentials-view.js),
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[`edits.rs`](../host/src/cred/edits.rs), and [`browser cryptography`](../userland/web/credentials.js).
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## Models
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The world config is `/etc/sausage/config.yaml`, at `WORLD/world/etc/sausage/config.yaml` on the host.
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It contains the proxy settings, standing-agent name, global prompt, and roster.
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Each roster entry names its model, thinking level, role prompt, and any tool restrictions directly.
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There are no model families or project overlays.
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Every agent receives the global `prompt` before its role prompt.
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The shared prompt explains how agents inspect their own model and the live harness state.
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Run `sausage init`, fill `proxy.base_url` and `proxy.api_key` in the config, then run `sausage run`.
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Init leaves both settings empty. The host and chat still start.
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A model request with missing settings fails with an error that names the config file.
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The proxy no longer requires an item in the credentials manager.
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The proxy key is intentionally visible to agents. Do not print it or commit the world config.
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Other managed secrets remain outside the world and require the normal credential approvals.
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Edit `standing` to select a roster member. The same standing conversation adopts its name, model, and role prompt.
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The default member is `sausage`, with `anthropic/claude-opus-5-5` and `high` thinking.
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Model and prompt edits apply at the next run without a restart.
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Proxy edits apply before the next model request.
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All real model requests retain the host proxy transport.
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Sources: [`credentials.rs`](../host/src/harness/credentials.rs), [`main.ts`](../host/js/main.ts),
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and [`models`](../extensions/models/README.md).
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## Change extensions
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The world checkout is `/src/sausage`. The loader follows its **`main`** branch, not the host checkout's `v3` branch.
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Each extension lives at `extensions/NAME/server.ts` inside that checkout.
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Commit extension edits to `main` with world git. A saved, uncommitted edit does not reload an extension.
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Use `--no-gpg-sign` for commits.
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The loader imports a detached snapshot under `/run/sausage/extensions/COMMIT`.
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It validates the entire candidate before it replaces the live registry.
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A broken candidate leaves the previous good commit active.
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An active tool call retains its implementation. The next call uses the new implementation.
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Read `/proc/extensions` through the agent's file tools to inspect `current`, `good`, and `error`.
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To restore the last good branch ref, ask the agent to execute:
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```sh
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extensions-revert
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```
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The command preserves editable files. It changes `refs/heads/main`, which triggers the normal reload.
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At startup, the loader tries the tip and then the last good commit before it resumes work.
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Source: [`extensions`](../extensions/README.md) and [`extensions.ts`](../host/js/extensions.ts).
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## Everyday tools inside the world
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These are world programs, not console commands. Ask the agent to run them.
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| Tool | Use and limits |
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| --- | --- |
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| `cargo` | Build, run, and test Rust programs. The host copies the workspace through the VFS, fetches dependencies, then builds offline in namespaces. It publishes WASI artifacts into the world. Other targets are unsupported. |
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| `box` | Build non-Rust projects or run browser tests in disposable containers. The default service is `citadel.vpn.surma.technology:8093`. It requires network access and service availability. Remove boxes after use. |
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| `undo` | Inspect tags and restore filesystem changes. Later edits can conflict. Network effects and native builds are not reversible. Retention is seven days or 4 GiB of unique content. |
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| `systemctl` | Control world init services, not Citadel's systemd. Persistent units live under `/etc/systemd/system`. Init observes edits without daemon reload. |
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| `journalctl` | Read world service logs under `/var/log/journal`. Each unit retains a 1 MiB log and one rotated file. |
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| `git` | Manage world repositories. HTTPS credential rules can inject authorization through the host HTTP hook. SSH remotes use host signing. |
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| `ssh` | Execute a remote command without a PTY. Public identities and signatures come from the host. Private keys never enter the world. Host keys live in the world's known_hosts file. |
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Init starts when the host starts the runtime, if `/bin/init.wasm` exists.
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Transient units under `/run/systemd/transient` disappear after restart.
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A missing credential grant causes a pending host request, not an automatic approval.
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A changed SSH host key fails even with the accept-new policy.
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Command reference and implementation evidence:
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[`builder`](../host/src/builder/README.md), [`box`](../userland/box/README.md),
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[`undo`](../userland/undo/README.md), [`init`](../userland/init/README.md),
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[`git`](../userland/git/README.md), and [`ssh`](../userland/ssh/README.md).
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## Build a world UI with the host API
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World programs call **`http://host.sausage`** through standard WASI HTTP.
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The world web server forwards `/api/PATH` to `http://host.sausage/PATH` through WASI HTTP.
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It streams response chunks instead of buffering the entire NDJSON body.
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The bootstrap page polls `entries?after=` once per second rather than using a persistent stream.
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Use the credential views in the web UI. They call only `/api/cred/...` JSON routes.
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| Method and route | Result or request |
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| `GET /harness/conversations` | Conversation records and `standing: {name, conversationId}` for the default selection. |
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| `GET /harness/conversations/ID/entries?after=0` | `{entries:[...]}` in ascending order. |
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| `GET /harness/conversations/ID/stream?after=0` | NDJSON entries, replay first, then live commits. |
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| `POST /harness/conversations/ID/submit` | `{content:"text",requestId:"stable-id"}` returns 202 and a submission ID. Reuse the request ID for retries. |
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| `POST /harness/conversations/ID/stop` | Stops active turns and owned work. Queued input remains. |
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| `GET /harness/events?after=0` | NDJSON events, replay first, then live commits. |
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| `POST /harness/extensions/NAME/actions/ACTION` | `{args:{...},conversationId?:number}` invokes an exported user action. |
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| `GET /harness/models` | Public model catalog without authentication data. |
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| `GET /harness/extensions` | Loaded extension status. |
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| `GET /harness/credential-requests` | Pending conversation requests with `/#approve/ID` links. |
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The `after` cursor is exclusive. Reconnect with the last record ID.
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Streams close when the client disconnects or the harness stops.
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Do not render a stream as one JSON response.
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An unavailable harness returns 503. Invalid input returns 400. Missing resources return 404.
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Source: [`host API contract`](../host/src/api/README.md),
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[`harness-api.ts`](../host/js/harness-api.ts), and [`harness/http.rs`](../host/src/harness/http.rs).
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## Known gaps before cutover
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- Laptop access, passkey ceremonies, secret entry, and browser approval remain **to check with Surma**.
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- Startup checks use fake proxy credentials. They do not verify a real model session or external credential injection.
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- The bootstrap chat is deliberately plain. There is no item editor or credential dashboard.
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- The console has no shell commands, transcript navigation, or special quit command.
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- `sausage sh` requires `-c`. Its interactive shell is not implemented.
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- This guide does not migrate a v2 world. Keep the live v2 folder untouched.
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A successful local start does not verify external services or the production passkey origin.
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