The central design idea of WOD Wiki is: everything is a metric. A workout plan, a tracked result, and a derived insight are all expressed as Metric objects. The only difference is their origin and ownership layer.

A Metric has:

interface IMetric {
  type: MetricType | string;   // e.g. 'rep', 'duration', 'effort', 'hint'
  value?: unknown;             // the numeric/string/object value
  origin: MetricOrigin;        // who created it
  unit?: string;               // kg, m, lb, etc.
  action?: 'suppress';         // hides this metric type
  sourceBlockKey?: string;     // runtime block that owns it
  timestamp?: Date;            // when it was recorded
  metadata?: Record<string, unknown>;
  name?: string;
}

When several metrics of the same type exist on one statement/block, the ownership resolver picks one winner:

parser → dialect → user-plan → runtime → user-entry
(low)                           (high)

Higher layers shadow lower layers. A suppressor metric hides all metrics of its type.

Markdown source
      │
      ▼
┌─────────────┐   parser metrics   ┌─────────────────┐
│    Parse    │ ─────────────────▶ │  CodeStatement  │
│   (Lezer)   │                    │ MetricContainer │
└─────────────┘                    └─────────────────┘
      │
      ▼
┌─────────────┐   dialect metrics  ┌─────────────────┐
│   Dialect   │ ─────────────────▶ │  CodeStatement  │
│    Stack    │                    │ MetricContainer │
└─────────────┘                    └─────────────────┘
      │
      ▼
┌─────────────┐   compiler metrics   ┌───────────────┐
│ JIT Compile │ ───────────────────▶ │  RuntimeBlock │
│             │                      │  + Behaviors  │
└─────────────┘                      └───────────────┘
      │
      ▼
┌─────────────┐   runtime/user metrics  ┌─────────────────┐
│    Run on   │ ──────────────────────▶ │ OutputStatement │
│    Clock    │                         │ MetricContainer │
└─────────────┘                         └─────────────────┘
      │
      ▼
┌─────────────┐   analyzed metrics     ┌─────────────────┐
│  Analytics  │ ───────────────────▶ │ OutputStatement │
│   Engine    │                        │ MetricContainer │
└─────────────┘                        └─────────────────┘

The Lezer grammar turns source text into a CST. syntax-parser.ts maps CST nodes to typed SyntaxPrimitives and builds an indentation tree. semantic-classifier.ts turns primitives into IMetrics.

Examples:

• 5:00 → Duration(300000)
• 10 → Rep(10)
• Push Ups → Effort("Push Ups")

The Dialect Stack fuses numbers with units, recognizes protocol keywords, and emits hints.

Examples:

• 400m Run → Distance(400, m) + Effort("Run")
• AMRAP keyword → Hint("workout.amrap")

The JIT compiler matches IRuntimeBlockStrategy implementations against each statement group. Strategies add Behaviors to a shared BlockBuilder. Behaviors are capabilities such as timers, rounds, sound cues, and reporting.

Compiler output is a tree of IRuntimeBlocks ready for the stack.

ScriptRuntime pushes blocks onto a RuntimeStack. Each block receives lifecycle calls:

• mount()
• next()
• unmount()
• dispose()

As the athlete presses Next, finishes a round, or a timer expires, blocks emit OutputStatements carrying runtime metrics (elapsed time, completed reps, actual load).

After (or during) execution, analytics processors derive insight metrics:

• volume = reps × load
• pace = distance / elapsed
• power = work / time
• tis = Training Intensity Score (composite)

These are written as analyzed metrics into the same MetricContainer stream.

MetricContainer is the typed collection that rides on CodeStatement, IRuntimeBlock, and OutputStatement. It provides:

• get(type) — highest-precedence metric of a type
• getByType(type) — all metrics of a type, sorted by precedence
• resolve(filter?) — apply ownership resolution
• add(...metrics), remove(...), merge(...)

1. Metrics are never overwritten — each stage adds new metrics at its own origin.
2. Ownership resolution decides display — the highest visible layer wins.
3. Hints are metrics — MetricType.Hint flows through the same channel but is excluded from display.
4. Suppressors hide by type — a Metric with action: 'suppress' hides all metrics of that type.
5. Choices collapse before runtime — unresolved Choice metrics are resolved to user-plan metrics before the first block compiles.

• 05-architecture.md — pipeline architecture
• 08-analytics.md — analytics derivation