content_design.md: full recipe quantities and durations computed with
a recursive threat calculator - economy constants (scrap_per_threat
0.25, reprocessing 4 scrap / 4 s, voidsteel at threat 100), per-item
threat values, module contributions, and fitted ship threats vs the
ladder (96-124%, smooth ~x2-per-class curve). Checks recorded: ratio
curve realized (t1 1:1, t2 2:3, t3 strange), belt feasibility under
the single-belt cap, block at 4 threat implying ~18 blocks average
building cost for the 4-minute doubling target, and a small-end
deviation note recommending ladder adjustment over chain thinning.
progression_design.md: two new action items - amend REQ-THREAT-ITEM to
exclude scrap-consuming recipes from item threat (the max rule would
otherwise inflate basic materials via the scrap smelting recipe), and
port the calculator to tools/threat_report.py.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DyCu8vwChKMbLJQ3xosYEN