V4 Flash god mode for DeepSeek Harness

Key features

• V4 Flash "god mode" for DeepSeek Harness: w7 persona anchoring + first-turn tool anchoring + complexity-dispatched guidance — turn Flash's unstable thinking into reproducible capability.
• The complexity heuristic (text.length 120 or architecture keywords) is the author's original — a filename like analyze.py counts as complex.
• w7 persona (author-measured Flash optimum) — neutral identity + classify-then-act instruction + recall/anti-runaway anchors.
• No deep-thinking sentence baked in (author's correction: per-message guidance is negative on related-task chains, P21).
• Complexity-dispatched guidance — complex tasks get the decision-closure deep guide, simple tasks get the fast-convergence guide.