Per analysis/unified_routing_fix_review.md #2, several docs still
presented the retired single-argmin + PUSH-migration design as the
final algorithm. Mark them superseded and document the current hybrid
direction (commit 255c8e6).
- REPORT.md §1.1 / §3.9: add errata callout and section header noting
the "Final Design" framing was retired after cc6e562 / 4c583f2;
point readers to docs/migration-policy-design.md.
- docs/migration-policy-design.md: rewrite. Opens with the current
hybrid algorithm (LMetric base + cache_ratio>0.5 affinity gate +
tie-breaker), then a "What Was Retired" commit table, then the old
Approach A numbers preserved as "Historical Baseline-Mode Comparison".
- analysis/research_findings.md §2.2 / §5: correct the LMetric framing.
LMetric isn't "neutralized by affinity constraints" (pure --policy
lmetric has no affinity at all); it converges to similar placements
because P_tokens includes new_uncached_tokens, giving it implicit
soft affinity.
- analysis/elastic_hypotheses.md: same LMetric correction in the
"DOESN'T work" summary, plus a footer cross-referencing the current
routing direction.
- analysis/unified_routing_fix_review.md: track this file (was
untracked); it is the review handoff cited from the updated docs.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Approach A (contention-aware cost model): TTFT p90 -52% vs baseline.
Approach B (session migration): 0 triggers at 1.5x threshold — needs tuning.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
