doc headers

lib/cycles/ccyc/Ccyc.Validation.Tests.cs

@@ -161,12 +161,12 @@ public class CcycValidationTests
         var ccycNoise = new Ccyc(0.07);
         var ccycSine = new Ccyc(0.07);
 
-        var rng = new Random(42);
+        var rng = new GBM(startPrice: 100.0, sigma: 0.1, seed: 42);
         double sineEnergy = 0;
 
         for (int i = 0; i < 300; i++)
         {
-            double noiseVal = 100 + rng.NextDouble() * 10;
+            double noiseVal = rng.Next().Close;
             ccycNoise.Update(new TValue(DateTime.UtcNow.AddMinutes(i), noiseVal), true);
 
             double sineVal = 100 + 10 * Math.Sin(2 * Math.PI * i / 20.0);

lib/cycles/ccyc/Ccyc.md

@@ -1,5 +1,22 @@
 # CCYC: Ehlers Cyber Cycle
 
+| Property         | Value                            |
+| ---------------- | -------------------------------- |
+| **Category**     | Cycle                        |
+| **Inputs**       | Source (close)                          |
+| **Parameters**   | `alpha` (default 0.07)                      |
+| **Outputs**      | Single series (Ccyc)                       |
+| **Output range** | Varies (see docs)                     |
+| **Warmup**       | `7` bars                          |
+
+### TL;DR
+
+- CCYC isolates the dominant cycle component from price data using a 2-pole high-pass IIR filter applied to a 4-tap FIR-smoothed input, producing an ...
+- Parameterized by `alpha` (default 0.07).
+- Output range: Varies (see docs).
+- Requires `7` bars of warmup before first valid output (IsHot = true).
+- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
+
 CCYC isolates the dominant cycle component from price data using a 2-pole high-pass IIR filter applied to a 4-tap FIR-smoothed input, producing an oscillator that strips trend while preserving cyclical content with minimal lag. The companion trigger line (one-bar delay of the cycle output) provides crossover signals for timing entries and exits. Unlike band-pass approaches that require specifying a center frequency, CCYC's high-pass architecture extracts whatever cyclic energy exists above a cutoff controlled by a single $\alpha$ damping parameter, making it adaptive to the dominant period present in the data.
 
 ## Historical Context