# CSTE: Cognitive Shield Telemetry Engine Specification
**Document ID:** CSTE-SPEC-2026-09  
**Target:** `wasm32-freestanding` (Zig 0.16.0)  
**Classification:** Open Epistemic Standard / CogFend Defensive Disclosure  
**Authors:** Asse van Nix & The CogFend Project  

---

## 1. Silicon & Memory Substrate Invariants

The Cognitive Shield Telemetry Engine (CSTE) enforces hard architectural constraints to guarantee deterministic execution, zero runtime garbage collection latency, and low thermal power consumption ($\le 7\text{W}$) across mobile devices and handheld gaming consoles (e.g. Steam Deck):

```text
+------------------------------------------------------------------------+
|                    WASM LINEAR MEMORY MAP (128 KiB)                    |
+-------------------+----------------------------------------------------+
| Page 0 (64 KiB)   | Framebuffer (320x240 @ 8bpp indexed: 76,800 B)     |
|                   | Font ROM & Analytical SDF Decals (16,384 B)        |
+-------------------+----------------------------------------------------+
| Page 1 (64 KiB)   | Simulation State Ring-Buffer (32,768 B)            |
|                   | SPDL-MUSIC Telemetry Scratchpad (16,384 B)         |
|                   | Static Call Stack Ceiling (<= 128 B)               |
+-------------------+----------------------------------------------------+
```

1. **Axiom S-1: Linker-Level Malloc Elimination:**
   - Zero dynamic memory allocation (`malloc`, `free`, GPA) in the simulation core.
   - Total linear memory footprint is strictly clamped to exactly two 64 KiB WebAssembly pages ($131,072\text{ bytes}$).
   - Stack frame ceiling: $\le 128\text{ bytes}$ per execution frame.

2. **Axiom S-2: Tri-Deck Procedural Layout:**
   - Display rendered directly via procedural WebGPU fragment shaders (WGSL) or fallback 2D Canvas bitmap blits.
   - Font rendering executed via in-shader 5x7 bitmapped ROM, eliminating DOM recalculation overhead.

3. **Axiom S-3: 10/10 Motor-Kinetic Sparing:**
   - Simulation advancement is strictly event-driven.
   - During user deliberation, clock advancement velocity is exactly $0\text{ ms/s}$.