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feat(simulation): basin-outlet course wiring — the endorheic cue (D-227, T-1185)

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extend_river_network_with_basin_outlets threads each Overflow basin's
resolved outlet_path into RiverNetwork as real D8 downstream
continuations (spill cell skipped as lake interior; Sea target ends at
RIVER_DOWNSTREAM_MOUTH with a seaward entry, Basin/OpenSpillway at
RIVER_DOWNSTREAM_EDGE_DRAIN); Endorheic basins contribute nothing —
the ruled zero-bit cue is outflow-course PRESENCE (D-227 amendment
(4)): a lake with no outgoing course reads as closed. Additive per
T-1170 Ruling 7b; no wire migration, no new zone, no endorheic bit.

Wired in run_layer1_with_moisture strictly AFTER attractor extraction
so outlet cells never perturb settlement placement (tested). Edge
identity is the existing pack_cell_id (row,col) convention; wiring
determinism proven by three independent double-solve byte-identity
tests. 13 new tests across hydrology_equilibrium and layer1.

Goldens: cascade_layer1.json re-pinned (third deliberate re-pin,
documented in cascade_golden.rs) — river_cells 93->143 on GJ1c,
append-only prefix byte-identical, 51/53 real basins Overflow with
short OpenSpillway stubs (the dominant honest pattern: most basins
spill onto adjacent open ground, not a long channel to sea).
window_derivation_golden and river_course_golden verified structurally
unreachable and unchanged.

Known scope boundary (documented in-code): outlet cells carry
river_class 0 (stream) — outlet-channel classification/meander width
scaled to catchment is a named follow-up, not guessed at here.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
jpmschweitzer
2026-07-25 08:40:07 +02:00
co-authored by Claude Fable 5
parent e0a3ab35cf
commit 58cb1fec71
4 changed files with 1131 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
server/tests/golden/cascade_layer1.json
+501 -1
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