clik-engine API
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    Class HarnessRunner

    Top-level orchestrator for the multi-instance test harness. One call boots N headless game instances, runs each through its scenario, and returns a single HarnessReport summarising results.

    The runner forces headless: true and debug: false, injects a ScriptedProvider into each game's InputManager, and installs a per-instance seeded RNG on game.registry at __clikHarnessRandom so scenes can opt into determinism via getRandom.

    import { HarnessRunner, RandomFuzzStrategy } from 'clik-engine';

    const report = await HarnessRunner.run({
      config: myGameConfig,
      scenario: {
        strategy: new RandomFuzzStrategy({ actions: ['left', 'right', 'jump'] }),
        maxFrames: 600,
        collectMetrics: ctx => ctx.snapshot(),
      },
      seeds: { count: 100 },
      concurrency: 8,
      onProgress: (done, total) => console.log(`${done}/${total}`),
    });

    report.passed;          // 94
    report.runs[0].metrics; // per-run metrics

    docs/systems/harness.md

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