README.md: from 42-line index to rich documentation hub with project
overview, reading order, and key directory listing.
v3-findings.md: from 63 lines to comprehensive research findings covering
adversarial review details, provider coupling analysis, codebase reuse,
session anchor design, multi-agent design rationale, theme evolution,
and performance measurements.
v3 architecture planning: task plan with core concept, user requirements,
and architecture questions for adversarial review. Findings doc with
codebase reuse analysis (keep/replace/drop). Progress log for v3 sessions.