#2549: load_prior_context was reading every prior *-CONTEXT.md file,
growing linearly with project phase count. Cap to the 3 most recent
phases. If .planning/DECISIONS-INDEX.md exists, read that instead.
#2550: scout_codebase claimed to select maps "based on phase type" but
had no classifier — agents read all 7 maps. Replace with an explicit
phase-type-to-maps table (2–3 maps per phase type) with a Mixed fallback.
#2552: Add explicit instruction not to split-read the same file at two
different offsets. Split reads break prompt cache reuse and cost more
than a single full read.
Closes#2549Closes#2550Closes#2552
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
67a9550720