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storybook/docs/book/reference/19-validation.html
Sienna Meridian Satterwhite 16deb5d237 release: Storybook v0.2.0 - Major syntax and features update
BREAKING CHANGES:
- Relationship syntax now requires blocks for all participants
- Removed self/other perspective blocks from relationships
- Replaced 'guard' keyword with 'if' for behavior tree decorators

Language Features:
- Add tree-sitter grammar with improved if/condition disambiguation
- Add comprehensive tutorial and reference documentation
- Add SBIR v0.2.0 binary format specification
- Add resource linking system for behaviors and schedules
- Add year-long schedule patterns (day, season, recurrence)
- Add behavior tree enhancements (named nodes, decorators)

Documentation:
- Complete tutorial series (9 chapters) with baker family examples
- Complete reference documentation for all language features
- SBIR v0.2.0 specification with binary format details
- Added locations and institutions documentation

Examples:
- Convert all examples to baker family scenario
- Add comprehensive working examples

Tooling:
- Zed extension with LSP integration
- Tree-sitter grammar for syntax highlighting
- Build scripts and development tools

Version Updates:
- Main package: 0.1.0 → 0.2.0
- Tree-sitter grammar: 0.1.0 → 0.2.0
- Zed extension: 0.1.0 → 0.2.0
- Storybook editor: 0.1.0 → 0.2.0
2026-02-13 21:52:03 +00:00

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<h1 id="validation-rules"><a class="header" href="#validation-rules">Validation Rules</a></h1>
<p>The Storybook compiler performs multi-layered validation to catch errors before runtime. This chapter documents all validation rules, organized by declaration type, along with the error messages you can expect and how to fix them.</p>
<h2 id="validation-layers"><a class="header" href="#validation-layers">Validation Layers</a></h2>
<p>Storybook validation happens in four stages:</p>
<ol>
<li><strong>Lexical</strong>: Tokenization of raw text (invalid characters, malformed literals)</li>
<li><strong>Syntactic</strong>: Grammar structure (missing braces, wrong keyword order)</li>
<li><strong>Semantic</strong>: Cross-reference resolution, type checking, field merging</li>
<li><strong>Domain</strong>: Narrative-specific constraints (bond ranges, schedule overlaps)</li>
</ol>
<p>Errors at earlier stages prevent later stages from running.</p>
<h2 id="character-validation"><a class="header" href="#character-validation">Character Validation</a></h2>
<h3 id="required-rules"><a class="header" href="#required-rules">Required Rules</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Unique name</td><td>Character names must be unique within their module</td><td>Error</td></tr>
<tr><td>Species exists</td><td>If <code>: Species</code> is used, the species must be defined</td><td>Error</td></tr>
<tr><td>Templates exist</td><td>All templates in <code>from</code> clause must be defined</td><td>Error</td></tr>
<tr><td>No circular inheritance</td><td>Template chains cannot form cycles</td><td>Error</td></tr>
<tr><td>Field type consistency</td><td>Field values must match expected types</td><td>Error</td></tr>
<tr><td>Behavior trees exist</td><td>All <code>uses behaviors</code> references must resolve</td><td>Error</td></tr>
<tr><td>Schedules exist</td><td>All <code>uses schedule</code> references must resolve</td><td>Error</td></tr>
<tr><td>Prose tag uniqueness</td><td>Each prose tag can appear at most once per character</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples"><a class="header" href="#examples">Examples</a></h3>
<p><strong>Species not found:</strong></p>
<pre><code class="language-storybook">character Martha: Hobbit { // Error: species 'Hobbit' not defined
age: 34
}
</code></pre>
<p><strong>Fix:</strong> Define the species or correct the reference:</p>
<pre><code class="language-storybook">species Hobbit {
lifespan: 130
}
character Martha: Hobbit {
age: 34
}
</code></pre>
<p><strong>Duplicate character name:</strong></p>
<pre><code class="language-storybook">character Martha { age: 34 }
character Martha { age: 36 } // Error: duplicate character name 'Martha'
</code></pre>
<h2 id="template-validation"><a class="header" href="#template-validation">Template Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Unique name</td><td>Template names must be unique within their module</td><td>Error</td></tr>
<tr><td>Includes exist</td><td>All included templates must be defined</td><td>Error</td></tr>
<tr><td>No circular includes</td><td>Include chains cannot form cycles</td><td>Error</td></tr>
<tr><td>Range validity</td><td>Range bounds must satisfy min &lt;= max</td><td>Error</td></tr>
<tr><td>Range type match</td><td>Both bounds of a range must be the same type</td><td>Error</td></tr>
<tr><td>Strict enforcement</td><td>Characters using strict templates cannot add extra fields</td><td>Error</td></tr>
<tr><td>Resource links valid</td><td>Behavior/schedule references must resolve</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-1"><a class="header" href="#examples-1">Examples</a></h3>
<p><strong>Invalid range:</strong></p>
<pre><code class="language-storybook">template BadRange {
age: 65..18 // Error: range min (65) must be &lt;= max (18)
}
</code></pre>
<p><strong>Strict template violation:</strong></p>
<pre><code class="language-storybook">template Rigid strict {
required_stat: 10
}
character Constrained from Rigid {
required_stat: 15
extra_field: 42 // Error: field 'extra_field' not allowed by strict template 'Rigid'
}
</code></pre>
<h2 id="behavior-tree-validation"><a class="header" href="#behavior-tree-validation">Behavior Tree Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>At least one node</td><td>Behavior body must contain at least one node</td><td>Error</td></tr>
<tr><td>Composite children</td><td><code>choose</code> and <code>then</code> require at least one child</td><td>Error</td></tr>
<tr><td>Decorator child</td><td>Decorators require exactly one child</td><td>Error</td></tr>
<tr><td>Subtree exists</td><td><code>include</code> must reference a defined behavior</td><td>Error</td></tr>
<tr><td>Expression validity</td><td>Condition expressions must be well-formed</td><td>Error</td></tr>
<tr><td>Duration format</td><td>Decorator durations must be valid (e.g., <code>5s</code>, <code>10m</code>)</td><td>Error</td></tr>
<tr><td>Repeat count valid</td><td><code>repeat N</code> requires N &gt;= 0</td><td>Error</td></tr>
<tr><td>Repeat range valid</td><td><code>repeat min..max</code> requires 0 &lt;= min &lt;= max</td><td>Error</td></tr>
<tr><td>Retry count valid</td><td><code>retry N</code> requires N &gt;= 1</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-2"><a class="header" href="#examples-2">Examples</a></h3>
<p><strong>Empty composite:</strong></p>
<pre><code class="language-storybook">behavior Empty {
choose options {
// Error: 'choose' requires at least one child
}
}
</code></pre>
<p><strong>Invalid subtree reference:</strong></p>
<pre><code class="language-storybook">behavior Main {
include NonExistentBehavior // Error: behavior 'NonExistentBehavior' not defined
}
</code></pre>
<h2 id="life-arc-validation"><a class="header" href="#life-arc-validation">Life Arc Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>At least one state</td><td>Life arc must contain at least one state</td><td>Error</td></tr>
<tr><td>Unique state names</td><td>State names must be unique within the life arc</td><td>Error</td></tr>
<tr><td>Valid transitions</td><td>Transition targets must reference defined states</td><td>Error</td></tr>
<tr><td>Expression validity</td><td>Transition conditions must be well-formed</td><td>Error</td></tr>
<tr><td>Field targets valid</td><td>On-enter field references must resolve</td><td>Error</td></tr>
<tr><td>Reachable states</td><td>All states should be reachable from initial state</td><td>Warning</td></tr>
</tbody></table>
</div>
<h3 id="examples-3"><a class="header" href="#examples-3">Examples</a></h3>
<p><strong>Invalid transition target:</strong></p>
<pre><code class="language-storybook">life_arc Broken {
state active {
on timer_expired -&gt; nonexistent // Error: state 'nonexistent' not defined
}
}
</code></pre>
<p><strong>Unreachable state (warning):</strong></p>
<pre><code class="language-storybook">life_arc HasOrphan {
state start {
on ready -&gt; middle
}
state middle {
on done -&gt; end
}
state orphan {} // Warning: state 'orphan' is not reachable
state end {}
}
</code></pre>
<h2 id="schedule-validation"><a class="header" href="#schedule-validation">Schedule Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Time format</td><td>Times must be valid HH:MM or HH:MM:SS</td><td>Error</td></tr>
<tr><td>Extends exists</td><td>Base schedule must be defined</td><td>Error</td></tr>
<tr><td>No circular extends</td><td>Schedule chains cannot form cycles</td><td>Error</td></tr>
<tr><td>Named blocks unique</td><td>Block names must be unique within a schedule</td><td>Error</td></tr>
<tr><td>Action references valid</td><td>Action references must resolve to defined behaviors</td><td>Error</td></tr>
<tr><td>Constraint values valid</td><td>Temporal constraint values must reference defined enums</td><td>Error</td></tr>
<tr><td>Recurrence names unique</td><td>Recurrence names must be unique within a schedule</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-4"><a class="header" href="#examples-4">Examples</a></h3>
<p><strong>Invalid time format:</strong></p>
<pre><code class="language-storybook">schedule Bad {
block work {
25:00 - 17:00 // Error: invalid hour '25'
action: work
}
}
</code></pre>
<p><strong>Circular extends:</strong></p>
<pre><code class="language-storybook">schedule A extends B { }
schedule B extends A { } // Error: circular schedule extension detected
</code></pre>
<h2 id="relationship-validation"><a class="header" href="#relationship-validation">Relationship Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>At least two participants</td><td>Relationships require &gt;= 2 participants</td><td>Error</td></tr>
<tr><td>Participants exist</td><td>All participant names must reference defined entities</td><td>Error</td></tr>
<tr><td>Unique participants</td><td>Each participant appears at most once</td><td>Error</td></tr>
<tr><td>Field type consistency</td><td>Fields must have valid value types</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-5"><a class="header" href="#examples-5">Examples</a></h3>
<p><strong>Too few participants:</strong></p>
<pre><code class="language-storybook">relationship Lonely {
Martha // Error: relationship requires at least 2 participants
bond: 0.5
}
</code></pre>
<h2 id="species-validation"><a class="header" href="#species-validation">Species Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Unique name</td><td>Species names must be unique within their module</td><td>Error</td></tr>
<tr><td>No circular includes</td><td>Include chains cannot form cycles</td><td>Error</td></tr>
<tr><td>Includes exist</td><td>All included species must be defined</td><td>Error</td></tr>
<tr><td>Field type consistency</td><td>Fields must have valid values</td><td>Error</td></tr>
<tr><td>Prose tag uniqueness</td><td>Each prose tag can appear at most once</td><td>Error</td></tr>
</tbody></table>
</div>
<h2 id="enum-validation"><a class="header" href="#enum-validation">Enum Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Unique enum name</td><td>Enum names must be unique within their module</td><td>Error</td></tr>
<tr><td>Unique variants</td><td>Variant names must be unique within the enum</td><td>Error</td></tr>
<tr><td>Non-empty</td><td>Enums must have at least one variant</td><td>Error</td></tr>
<tr><td>Valid identifiers</td><td>Variants must follow identifier rules</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-6"><a class="header" href="#examples-6">Examples</a></h3>
<p><strong>Duplicate variant:</strong></p>
<pre><code class="language-storybook">enum Size {
tiny,
small,
small, // Error: duplicate variant 'small' in enum 'Size'
large
}
</code></pre>
<h2 id="institution-and-location-validation"><a class="header" href="#institution-and-location-validation">Institution and Location Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Unique name</td><td>Names must be unique within their module</td><td>Error</td></tr>
<tr><td>Resource links valid</td><td>Behavior/schedule references must resolve</td><td>Error</td></tr>
<tr><td>Field type consistency</td><td>Fields must have valid values</td><td>Error</td></tr>
</tbody></table>
</div>
<h2 id="expression-validation"><a class="header" href="#expression-validation">Expression Validation</a></h2>
<p>Expressions are validated wherever they appear (life arc transitions, behavior tree conditions, if decorators).</p>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Type consistency</td><td>Both sides of comparison must have compatible types</td><td>Error</td></tr>
<tr><td>Boolean context</td><td>Logical operators require boolean operands</td><td>Error</td></tr>
<tr><td>Field existence</td><td>Referenced fields must exist on the entity</td><td>Error</td></tr>
<tr><td>Collection validity</td><td>Quantifiers require collection-typed expressions</td><td>Error</td></tr>
<tr><td>Variable scope</td><td>Quantifier variables only valid within their predicate</td><td>Error</td></tr>
<tr><td>Enum validity</td><td>Enum comparisons must reference defined values</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-7"><a class="header" href="#examples-7">Examples</a></h3>
<p><strong>Type mismatch:</strong></p>
<pre><code class="language-storybook">life_arc TypeError {
state checking {
on count == "five" -&gt; done // Error: cannot compare int with string
}
state done {}
}
</code></pre>
<h2 id="use-statement-validation"><a class="header" href="#use-statement-validation">Use Statement Validation</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>Path exists</td><td>Imported paths must reference defined modules/items</td><td>Error</td></tr>
<tr><td>No circular imports</td><td>Modules cannot form circular dependency chains</td><td>Error</td></tr>
<tr><td>Valid identifiers</td><td>All path segments must be valid identifiers</td><td>Error</td></tr>
<tr><td>Grouped import validity</td><td>All items in <code>{}</code> must exist in the target module</td><td>Error</td></tr>
</tbody></table>
</div>
<h3 id="examples-8"><a class="header" href="#examples-8">Examples</a></h3>
<p><strong>Missing import:</strong></p>
<pre><code class="language-storybook">use schema::nonexistent::Thing; // Error: module 'schema::nonexistent' not found
</code></pre>
<h2 id="cross-file-validation"><a class="header" href="#cross-file-validation">Cross-File Validation</a></h2>
<p>When resolving across multiple <code>.sb</code> files, the compiler performs additional checks:</p>
<div class="table-wrapper"><table><thead><tr><th>Rule</th><th>Description</th><th>Severity</th></tr></thead><tbody>
<tr><td>All references resolve</td><td>Cross-file references must find their targets</td><td>Error</td></tr>
<tr><td>No naming conflicts</td><td>Declarations must not collide across files in the same module</td><td>Error</td></tr>
<tr><td>Import visibility</td><td>Only public declarations can be imported</td><td>Error</td></tr>
</tbody></table>
</div>
<h2 id="common-error-patterns"><a class="header" href="#common-error-patterns">Common Error Patterns</a></h2>
<h3 id="missing-definitions"><a class="header" href="#missing-definitions">Missing Definitions</a></h3>
<p>The most common error is referencing something that does not exist:</p>
<pre><code class="language-storybook">character Martha: Human from Baker {
specialty: sourdough
}
</code></pre>
<p>If <code>Human</code>, <code>Baker</code>, or the <code>sourdough</code> enum variant are not defined or imported, the compiler will report an error. Fix by adding the appropriate <code>use</code> statements:</p>
<pre><code class="language-storybook">use schema::core_enums::{SkillLevel, Specialty};
use schema::templates::Baker;
use schema::beings::Human;
character Martha: Human from Baker {
specialty: sourdough
}
</code></pre>
<h3 id="circular-dependencies"><a class="header" href="#circular-dependencies">Circular Dependencies</a></h3>
<p>Circular references are rejected at every level:</p>
<ul>
<li>Templates including each other</li>
<li>Species including each other</li>
<li>Schedules extending each other</li>
<li>Modules importing each other</li>
</ul>
<p>Break cycles by restructuring into a hierarchy or extracting shared parts into a common module.</p>
<h3 id="type-mismatches"><a class="header" href="#type-mismatches">Type Mismatches</a></h3>
<p>Storybook has no implicit type coercion. Ensure values match their expected types:</p>
<pre><code class="language-storybook">// Wrong:
character Bad {
age: "twenty" // Error: expected int, got string
is_ready: 1 // Error: expected bool, got int
}
// Correct:
character Good {
age: 20
is_ready: true
}
</code></pre>
<h2 id="validation-summary"><a class="header" href="#validation-summary">Validation Summary</a></h2>
<div class="table-wrapper"><table><thead><tr><th>Declaration</th><th>Key Constraints</th></tr></thead><tbody>
<tr><td>Character</td><td>Unique name, valid species/templates, no circular inheritance</td></tr>
<tr><td>Template</td><td>Unique name, valid includes, valid ranges, strict enforcement</td></tr>
<tr><td>Behavior</td><td>Non-empty, valid composites, valid decorators, valid subtrees</td></tr>
<tr><td>Life Arc</td><td>Non-empty, unique states, valid transitions, reachable states</td></tr>
<tr><td>Schedule</td><td>Valid times, valid extends chain, unique block names</td></tr>
<tr><td>Relationship</td><td>&gt;= 2 participants, valid references</td></tr>
<tr><td>Species</td><td>Unique name, valid includes, no cycles</td></tr>
<tr><td>Enum</td><td>Unique name, unique variants, non-empty</td></tr>
<tr><td>Institution</td><td>Unique name, valid resource links</td></tr>
<tr><td>Location</td><td>Unique name, valid field types</td></tr>
<tr><td>Use</td><td>Valid paths, no circular imports</td></tr>
</tbody></table>
</div>
<h2 id="cross-references"><a class="header" href="#cross-references">Cross-References</a></h2>
<ul>
<li><a href="./10-characters.html">Characters</a> - Character-specific validation</li>
<li><a href="./11-behavior-trees.html">Behavior Trees</a> - Behavior validation</li>
<li><a href="./13-life-arcs.html">Life Arcs</a> - Life arc validation</li>
<li><a href="./14-schedules.html">Schedules</a> - Schedule validation</li>
<li><a href="./17-expressions.html">Expression Language</a> - Expression validation</li>
<li><a href="./18-value-types.html">Value Types</a> - Type system constraints</li>
</ul>
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