0.76.0

## Scenario Graph

You can now see the execution structure of a project at a glance: scenario nodes connected by `dependency` edges, with reusable calls expanded per call site into the steps that actually execute (`with` bindings resolved the same way as at runtime).

```bash
arbigent graph
```

prints the graph as Mermaid — paste it into GitHub Markdown or [mermaid.live](https://mermaid.live) to view:

```mermaid
graph LR
  classDef reusable fill:#e8f0fe,stroke:#4285f4
  n0["login-flow<br/>Log in and reach the home screen"]
  n1["premium-content<br/>Play premium content"]
  n2[["login (user=paid)"]]:::reusable
  n0 --> n1
  n1 -.-> n2
```

The same graph is available in the UI via the new "Scenario graph" button, as a zoomable and pannable dialog with a "Copy Mermaid" action.

## Built-in Guides for AI Coding Agents

The CLI now documents itself, so AI coding agents (Claude Code, Codex, etc.) can operate Arbigent end to end just by being pointed at the `arbigent` command:

```bash
# List available guide topics
arbigent guide

# Print a guide
arbigent guide writing-yaml
```

Five topics are built in — `setup`, `writing-yaml`, `inspecting-project`, `running-scenarios`, `debugging-failures` — and they are listed at the end of `arbigent --help` so agents can discover them on their own. Combined with `arbigent scenarios`, `arbigent tags`, and `arbigent graph` (none of which need an AI API key or a device), an agent can inspect a project, edit scenario YAML, run scenarios, and read the results without any hand-written project documentation. For example:

> Run `arbigent guide writing-yaml` and follow it to add a scenario that verifies the login flow, then run it with `arbigent run --scenario-ids="login-flow"`.

## Scenario Search in the UI

The scenario list panel now has a search toggle that filters scenarios by goal and note (case-insensitive). Ancestors of matching scenarios stay visible so the dependency structure remains readable while filtering.

## Toolchain Upgrade

Arbigent is now built with Kotlin 2.3.21, Compose 1.10.3, and Jewel 0.37.

## What's Changed
* Add search by goal and note to scenario list panel by @takahirom in https://github.com/takahirom/arbigent/pull/388
* Upgrade to Kotlin 2.3.21, Compose 1.10.3 and Jewel 0.37 by @takahirom in https://github.com/takahirom/arbigent/pull/389
* Add guide command printing agent-facing guides from arbigent CLI by @takahirom in https://github.com/takahirom/arbigent/pull/390
* Update CLI docs in README and document AI agent usage by @takahirom in https://github.com/takahirom/arbigent/pull/391
* Add scenario graph view to CLI and UI by @takahirom in https://github.com/takahirom/arbigent/pull/392
* Extract ComboBoxItem composable and restore item content descriptions by @takahirom in https://github.com/takahirom/arbigent/pull/393
* Share reusable node colors from graph model and consolidate node styling by @takahirom in https://github.com/takahirom/arbigent/pull/394
* Fix non-deterministic scenario graph screenshot by fixing dependency scenario id by @takahirom in https://github.com/takahirom/arbigent/pull/395

**Full Changelog**: https://github.com/takahirom/arbigent/compare/0.75.0...0.76.0