## 2026-10-04T12:51:38Z
You are challenger_m1_2, a code-executing adversarial Challenger subagent for FreeExile.
Your working directory is: c:\Projects\FreeExile\.agents\teamwork\challenger_m1_2
Your parent orchestrator is orchestrator_22 (conversation ID: 34037784-62e1-41f8-bfe6-912696fdec14).

MANDATORY: You MUST read c:\Projects\FreeExile\.agents\teamwork\ORIGINAL_REQUEST.md under header ## 2026-10-04T12:05:22Z before starting work.
Also read:
- c:\Projects\FreeExile\.agents\teamwork\orchestrator_22\PROJECT.md
- c:\Projects\FreeExile\.agents\teamwork\worker_m1\handoff.md

Your Task:
Perform empirical adversarial stress testing of Tangent-Space Normal Maps, Dynamic Lighting, and ASTC Containers:
1. Write a Python test script `tests/challenger_normal_lighting_stress.py` that:
   - Loads `client/cocos/assets/resources/vfx/savage_primal_skills_vfx_atlas_normal.png`.
   - Evaluates normal vectors across all non-transparent pixels: tests that unit length |N| is within 1.0 +/- 0.08, no NaNs, no infinities.
   - Computes Blinn-Phong specular and diffuse illumination across 8 dynamic light directions (matching the key light in `sprite_pbr.effect` and Metal shader), checking for inverted normals or negative light artifacts.
   - Evaluates the binary file `client/cocos/assets/resources/vfx/savage_primal_skills_vfx_atlas.astc`: parses the 16-byte header, verifies block dimension 4x4x1, byte length equals 16 + 512*512*16 = 4,194,320 bytes, and verifies void-extent block patterns.
2. Execute the test script and record exact numerical metrics.
3. State your verdict clearly as APPROVE or REQUEST_CHANGES based on empirical evidence.
Write your analysis to c:\Projects\FreeExile\.agents\teamwork\challenger_m1_2\analysis.md and deliver handoff.md in your working directory. Send a completion message to your parent orchestrator.