# OWUI Tools

A tool server for [Open WebUI](https://github.com/open-webui/open-webui), and a VM
sub-agent that can actually try things.

A local assistant can reason, search and calculate. It cannot *check*. Asked whether a
PowerShell script works, it can only read documentation about PowerShell; asked for the
current version of a package, it recalls a number that was true when it was trained. This
fixes both halves: **22 tools** for looking things up and working things out, and one more
that hands a task to a second model driving a **real, throwaway virtual machine** which
writes the script, runs it, reads the actual error, fixes it, and comes back with evidence.

Everything runs on your own hardware. Nothing leaves the machine except the web requests a
tool makes on your behalf, and those go out through a proxy that refuses to touch your LAN.

> It speaks **OpenAPI**, which is what Open WebUI consumes natively — not the Model Context
> Protocol. If you are looking for an MCP server, this is not one.

```sh
cp configs/owuitools.env.example configs/owuitools.env
sed -i "s|^OWUITOOLS_AUTH_TOKEN=.*|OWUITOOLS_AUTH_TOKEN=$(openssl rand -hex 32)|" \
  configs/owuitools.env
docker compose up -d --build
```

Then register it in Open WebUI and paste the system prompt —
**[docs/install-ubuntu-desktop.md](docs/install-ubuntu-desktop.md)** walks through the whole
thing on a clean machine.

## What it gives the assistant

| Group | Tools |
|---|---|
| **Web and research** | `web_search`, `fetch_page`, `wikipedia_lookup`, `search_stackexchange`, `search_papers` |
| **IT and reference** | `lookup_rfc`, `lookup_cve`, `read_man_page`, `lookup_package` |
| **Networking** | `subnet_calc`, `dns_lookup`, `inspect_tls`, `http_headers`, `lookup_ip_or_asn`, `network_reference` |
| **Electronics** | `ohms_law_power`, `component_calc`, `pcb_calc`, `wiring_calc`, `find_datasheet` |
| **Execution** | `matlab_run` (Octave, sandboxed), `vm_agent` (a real machine) |

Most need no setup at all. Turn any of them off in
[`configs/tools.toml`](configs/tools.toml) — that removes them from the spec rather than
hiding them, so you stop paying their schema tokens on every turn. Full list and what each
needs: **[docs/tools.md](docs/tools.md)**.

## Configuring it

Everything you are meant to edit is in **[`configs/`](configs/)** — the stack's settings,
the tool switch, the assistant's system prompt, and the sub-agent's prompts, parameters and
tool definitions. Nothing else in the tree needs changing to run this.

See **[docs/configuration.md](docs/configuration.md)**.

## Isolation

The tool server takes URLs chosen by a language model, so it is built on the assumption that
one day it will be persuaded to fetch something it should not.

- The app container has **no default route**. It lives in a network namespace whose only
  permitted destinations are squid, valkey and the inbound request from its gateway.
- **squid refuses private address space** however politely it is asked.
- The filter **re-verifies itself** before its healthcheck passes: a firewall that silently
  failed to apply is worse than none, because everything downstream carries on as though it
  were enforced.
- Every container drops all capabilities, runs read-only where it can, and has memory and
  pid limits.

The VM sub-agent adds a second boundary: the guest has real internet and no route to your
network, enforced primarily by a systemd address filter — *not* by a firewall, which fails
open on any `nft flush ruleset`. `tests/vm_host_asserts.sh` proves it by turning each layer
off in turn and re-running the same probe against the others.

Details, including what it deliberately does **not** prevent:
**[docs/vm-agent/overview.md](docs/vm-agent/overview.md)**.

## The VM sub-agent

`vm_agent` starts a throwaway Ubuntu or Windows machine, hands it to a second model with
about thirty tools — a shell, a file editor, a screen it can look at and click on, and a
lookup suite — and returns a report whose facts are assembled by the trusted side rather
than by the agent.

The machine is destroyed afterwards. The project folder survives on a quota'd dataset, and
can be published to Gitea as a release.

Setup is the one substantial piece of work here: **[docs/setup/vm-agent.md](docs/setup/vm-agent.md)**.

## Documentation

- **[docs/](docs/README.md)** — installation, configuration, every tool, the recommended
  parameters, the filters.
- **[docs/operating.md](docs/operating.md)** — logs, rate limits, the cache, restarting
  things safely, and what to check when something looks wrong.
- **[logs/](logs/README.md)** — every component writes its own file there, so there is one
  place to look rather than nine `docker compose logs` invocations.
- **[docs/deployment/](docs/deployment/README.md)** — compose files for Ollama, Open WebUI
  and Gitea, the three services that live outside this repo.
- **[docs/TUNING.md](docs/TUNING.md)** — the change log. Every entry is one change: what it
  was meant to fix, and what measurably happened afterwards. Long, and the most useful
  document here if you intend to modify anything.
- **[docs/testing/](docs/testing/README.md)** — the corpus the tuning was measured against:
  forty graded prompts with rubrics, transcripts and scores.

## Requirements

Docker, an Ollama instance with a model, and Open WebUI. The VM sub-agent additionally needs
KVM, a ZFS pool and about 50 GB for base images — it is optional, and the tool removes
itself when the VM stack is absent.

Developed against Open WebUI 0.11.3 and `qwen3.8:latest` at a 160k context.

## Checking it works

```sh
./verify.py          # what is set up, what is off, what is broken
```

A one-line-per-tool report, a full log in `logs/verify.log`, and a separate
`logs/verify-error-<tool>.log` for anything that fails. See
[docs/verifying.md](docs/verifying.md).

## Running the tests

```sh
./tests/smoke.sh                  # every tool, through the real gateway
python3 tests/test_*.py           # unit tests, no container needed
sudo ./tests/vm_host_asserts.sh   # the VM isolation suite
```