The PR #206 eyeball caught what every numeric gate passed: the depth
signal was visually flat on both test lakes (GJ1c lmq=0 across the whole
basin; GJ338Bd 0-13 of 100). Two compounding causes: a fixed absolute
ceiling (one body's p90 cell depth) compressing skewed depth
distributions into single digits, and heightmap-pitch depth variation
being sub-texel-tiny within most basins. lake_margin_q is now
depth / the basin's own maximum settled depth: HydrologyResult grows
basin_max_depth_scaled (computed in solve() from existing basin_cells
membership, broadcast per basin), threaded through
HydrologySample.basin_max_depth, normalized in lake_from_hydrology_at
with a degenerate-basin epsilon guard (a genuinely uniform pond shades
flat — honest, not forced). Lake EXISTENCE (filled > original) is
untouched — only tone changes. Measured at district spacing:
GJ1c min=0 p50=33 max=84; GJ338Bd min=8 p50=38 max=70 — full-range
shore-to-deep ramps on both. No perceptual curve added: the linear
per-basin ramp is already well-quartiled. project.yaml 0.4.1 -> 0.4.2
(0.4.1-tagged canvases carrying flat-lmq semantics reached real disk
caches during eyeball runs and must miss). Acceptance gates green;
zero golden churn (lake_margin_q not captured by either golden shape).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Hoshe's review finding: the build_step_canvas row-space convention block
still described region_centre_latitude_deg as pole-anchored/bugged and
said 'T-1186 stays open' — both false after this PR's own first commit.
Rewritten to reflect the fixed state; the deliberate signed-convention
rationale and the layer_proxy deferral (still true, still T-1181's scope)
are preserved.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Lake edges rendered as hard step-edges while ocean coasts got multi-tone
transition bands: every coastal-transition morphology gate keys on
ocean_fraction_q, definitionally 0 inside a lake basin (hypothesis (b)
of the ticket; (a) disproven first — a shoreline-crossing sweep at
2048/512/128m plus a 10m fine sweep all land on the same continuous
crossing, so positional refinement was never broken). New
DistrictProfile.lake_margin_q (0-100 settled-hydrology depth band, from
the same bilinear filled/elevation pair the lake test already samples;
ceiling calibrated just above the observed p90 depth on GJ338Bd's 5,043
flooded cells), threaded through both derive paths onto
EncodedStepCanvas (serde-default for shape tolerance) and down the
client: protocol decode, terrain-layer plane, colorize shades Lake cells
by depth band instead of elev_q (bedrock-under-water, the wrong signal).
project.yaml 0.4.0 -> 0.4.1: the new wire field must invalidate the
client disk cache via its version tag (T-1183's D-192 mechanism).
Acceptance gates green with the new field (lossless round-trip,
cache-hit==cache-miss, every rung).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
region_centre_latitude_deg mapped row 0 to the north pole with lat_frac
clamped [0,1] while the derive core floor-divides equator-anchored signed
world metres — every northern-hemisphere region clamped to +90 (polar
everywhere) and the southern hemisphere read as compressed northern
tropics. Now mirrors the derive core's exact inverse mapping (lat_frac =
centre_y/meridian clamped [-0.5,0.5], lat = -frac*180). The ticket's
in-the-wild datapoint flips as predicted: GJ338Bd region (136,43), old
baseline +13.94N/26.8C -> new -76.06S/10.3C; the 76S district cell now
derives Lake/2.07C/Light glaciation. Goldens regenerated (believability +
window derivation, stable on rerun); two region_profile unit tests
repositioned — their probe coordinates meant different places under the
old convention. step_canvas rung-0 already used the correct signed
convention; layer_proxy's pole-anchored pseudo-grid stays deferred to
T-1181's rung-0 rebuild per D-256(f).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Hoshe finding 1 (live-firing on GJ1c: 2 spill collisions + 1 i==1
collision among 51 Overflow basins): adjacency adjudicated
INSUFFICIENT for the cue — a course's visible anchor is its upstream
cell, so nothing pre-existing belongs to the lake unless wired. The
spill cell (outlet_path[0]) now always gets a real entry: appended
when new, OVERWRITTEN IN PLACE when it collided with an existing river
cell (append would duplicate edge_id; the hydrology solve is the more
authoritative downstream answer for that cell than flat D8
extraction). Interior stop-on-collision stays, now provably safe.
Internal lookup is a dense Vec<Option<usize>>, never iterated (D-010).
Two non-vacuous regression tests prove the cue through build_edges
output; end-to-end on GJ1c all 51 Overflow basins now build a readable
edge (was: one silently missing).
Hoshe finding 2: both doc sites now state the fallback-vs-production
split explicitly (fallback moisture 55: 51/2; production GJ1c moisture
80: 53/53 all-Overflow) — the golden's Endorheic pair is a
fallback-constant artifact, not a fact about GJ1c.
Golden re-regenerated: river_cells 143->192, position-identity diff
purely additive (zero removed, one legitimate in-place overwrite at
the spill-collision cell); attractors/basins/mouths/confluences
byte-identical. Suites: hydrology 26/26, full lib 1943, cascade_golden
1/1, window goldens + believability untouched green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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>
Hoshe finding 1: StepCanvasRequest.extent is no longer wire-trusted —
clamp_step_canvas_extent enforces the D-255(b) canvas budget at the
request boundary (per-axis cap 3840 defeating u32::MAX before any
multiplication, then an aspect-preserving total-cell ceiling at the
measured 3840x2160 = 8,294,400-cell workshop budget), mirroring the
legacy carrier's clamp_window_n_v2 discipline; the Global rung ignores
the wire extent entirely. StepCanvasResponse gains the extent echo
field so a client can detect the clamp (the DistrictWindowLayer.n
precedent — a pre-existing gap closed in passing, recorded on the
ticket for T-1182). Seven new tests including an end-to-end u32::MAX
request proving actual allocation respects the cap.
Hoshe finding 2: submit_step_canvas coalescing now has the same two
regression tests its submit_window sibling always had (same-key
collapses to one pending item, different-key does not), exercising
step_canvas_supersede_key.
Targeted suites green: 1928 lib, acceptance gate 5/5, bridge_tcp 22/22,
window_derivation_golden 6/6 byte-green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Two needless mutable borrows in the serve system, one spurious
markdown list marker from a doc-comment line wrap (a leading '- '
turned the whole T-1186 convention note into a lazy continuation), and
a named row/col pair replacing the identity-op grid index in the
settlement-id tie test.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The T-1184 merge seam: TerrainAnalysisCache::get_or_derive gained a
body_params parameter (real moisture ceiling for the hydrology solve);
the DeriveStepCanvas arm now passes its own body_params so step-canvas
requests get the same hydrology-carrying TerrainAnalysis the legacy
DeriveWindow path does. Acceptance gate + window goldens green
post-merge.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The D-225-discharging wire migration per D-255(c): a new
server/src/atlas/step_canvas.rs subsystem (six-rung StepCanvasRung
ladder — Global variable-extent rung 0 through Chunk 64m — the
StepCanvasRequest/StepCanvasResponse tagged envelope extending the
proven ShapeProbe discriminated-shape pattern, PNG-per-field dense +
MessagePack-native sparse encoding per the T-1179 measured table, and
both server cache tiers: the structurally keep-always GlobalTierCache
and the dual-axis StepCanvasCache with storage TTLs per rung and
SIM_STATE_TTL clock-bucket staleness per the D-227 amendment (1)
formula). Wired through bridge/{mod,tcp,local}.rs (sixth demux shape,
send_step_canvas_response mirroring the five existing senders),
gen_queue.rs (DeriveStepCanvas work item with per-connection-per-rung
coalescing, reusing the shared TerrainAnalysisCache), and plugin.rs
(serve/complete systems, lazy D-206 rung-0 population).
Acceptance gate (mandatory per D-227 amendment (3)):
tests/step_canvas_acceptance_gate.rs — cache-hit == cache-miss
byte-identical for every rung, lossless encode round-trips, cache
round-trips vs fresh derive, distinct-center sanity. 5/5 pass.
Station-spacing cap ADOPTED: course stations floored to District
spacing (2,048 m) at finer rungs — the S2-measured +38-87% chunk/block
course cost had zero display benefit at the same station density
(COURSE_STATION_SPACING_FLOOR_M).
Documented honest gaps, not shortcuts: settlement_id is a proximity
approximation (no footprint polygons exist yet); glaciation/flooded_q
sim-state planes are wire-shape-ready D-253 stubs; rung-0 uses signed
equator-anchored rows (the canonical D-256 core convention — T-1186's
wrong-latitude behavior applies unchanged and unfixed here, by
instruction).
Legacy district_window carrier byte-unchanged: window_derivation_golden
6/6 byte-identical, all district_window suites pass unmodified. Full
suite at implementation time: 2127 passed across 45 binaries.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Hoshe finding 1: dropping HydrologySample.elevation was PROVEN unsafe
(TerrainAnalysis.elev_pct is a rank percentile, not raw elevation;
HydrologyResult carries no elevation) — the copy stays, and the truth
moves into the docs instead: gen_queue's TerrainAnalysisCache sizing
comment corrected to real 512x256 working-grid numbers (~1.57 ->
~2.62 MB/entry, capacity-8 worst case ~21 MB), clone-on-hit cost
documented, byte-safety proof recorded on HydrologySample itself.
Arc<TerrainAnalysis> follow-up filed as T-1187.
Hoshe finding 2: the endorheic-split test now asserts the bowl basin's
BasinOutcome actually diverges (Endorheic at moisture 0, Overflow at
100, straddling ENDORHEIC_MOISTURE_CEILING=60) plus basin-count sanity
— mutation-verified by stubbing is_endorheic and watching it fail.
Doc/test-only round: goldens byte-unchanged, full suite 2114 green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Productionizes the T-1177 equilibrium solver: run_layer1 now solves
hydrology once per body (~24ms, mirrors drainage::analyze) and carries
it as TerrainAnalysis.hydrology; run_layer1_with_moisture threads the
real body moisture ceiling (extracted derive_moisture_ceiling_q), with
the T-1177 population-survey default as fallback. The resident rung-0
global tier does not exist yet (T-1181's scope) — hydrology rides
TerrainAnalysis and lands in that tier for free when it is built
(deviation recorded on the ticket).
MorphologyZone::Lake is now sourced from the settled solver at derive
time: a gridunit is Lake when bilinear-sampled filled surface exceeds
bilinear-sampled original elevation at the sample's own (px, py) — the
continuous comparison, so lake edges refine with rung like coastlines;
never a discrete basin-cell projection. The gate sits strictly between
OpenOcean (>= 80) and the old ocean_fraction heuristic (>= 60), which
survives as the derive-fresh fallback when no solve is attached —
byte-identical to pre-T-1184 output in that case. Static
classification, distinct from the sim-state flooded plane; no
endorheic bit (the drains-vs-closed cue is T-1185's outlet-course
presence, per the D-227 amendment (4) sequencing). Zero new wire
bytes.
Acceptance: lake_classification_cache_hit_equals_cache_miss (solve
twice independently, byte-identical zones, non-vacuous Lake hit) plus
hydrology determinism tests. Golden fidelity: the window golden
fixture now builds TerrainAnalysis through the production entry point
(run_layer1_with_moisture, per-body), and a dedicated lake_bowl golden
body pins the hydrology-sourced Lake path (morphology 1 at
ocean_fraction_q 0 — provably not the heuristic); the 108 pre-existing
golden rows are byte-identical (pure append). believability.json moved
by one lake-shaped line (GJ338Bd voxel_relief_m 27->28, a correctly
reclassified lake district leaving the dry-relief sample set).
river_course and derivation-harness goldens unchanged. Full suite:
2114 passed.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Hoshe finding 1: derive_all_districts passed a permanently-empty
region_cache, so every survey cell paid four on-the-fly baseline
derivations — and derive_district_profile's docstring (build the cache
before calling in a loop) was contradicted by its sole production
caller. The cache is now pre-built on the TRUE region keys the shared
core looks up (survey-cell centre metres -> containing district ->
region ±1 ring, BTreeSet-deduped), restoring the per-body build-once
cost model. Cache-hit == cache-miss byte-identity holds by D-227 purity
(build_region_profile and the miss branch share the same expressions) —
verified by the believability harness passing against the UNCHANGED
golden. Finding 2: the cascade.rs call-site comment and the stale
module header now state the pre-build truthfully.
Found in passing, filed as T-1186 (pre-existing, out of scope here):
region_centre_latitude_deg is pole-anchored while the derive core keys
equator-anchored signed regions — northern-hemisphere baselines clamp
to +90.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
derive_district_profile is now a thin wrapper over the shared
derive_at_metres_with_riparian core at survey-cell-centre world metres
— one derive core, two position sets. The batch pseudo-grid and the
true D-243 district grid were two coordinate systems sharing one bare
(i32,i32) type; the new SurveyCellPos newtype re-keys every batch
product (BodyWorldState.districts, Layer1Output.survey_basin_dirs) so
the compiler rejects cross-namespace passing.
Fixes two latent same-position divergences the T-1174 investigation
surfaced: three inconsistent latitude conventions collapse into the
core's single inverse mapping, and the region-climate baseline now
floor-divides true world metres instead of collapsing the whole body
onto region (0,0)'s baseline — batch climate becomes latitude/region
graded (D-245 direction: every changed believability metric increased).
Binding preservations per D-256(c): basin_direction rides a post-call
override with the true L1 D8 survey-cell aggregate (layer1's map
re-keyed to SurveyCellPos, identity lookup — a floor-divide lookup
against the pseudo-keyed map would have silently defaulted every cell
North); the riparian verdict comes from near_perennial_water_at, never
the empty-slice default (which would have flipped riverside
vegetation_class).
Quarter-skeleton morphology_zone now resolves at the settlement's
exact world position via derive_at_metres at work-item execution
(where TerrainAnalysisCache lives), replacing the survey-cell-centre
map lookup (D-256(d)); settlement_district_pos fixed to true-district
floor-division in passing (same doc/impl mismatch class). Second
pixel-vs-metre conflation fixed in aliveness_probe's anchor-walk math.
Window path byte-unchanged (window_derivation_golden 6/6 byte-
identical); derivation_harness golden untouched; believability golden
regenerated. Full lib + integration suites green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Tyre C2: DownstreamTarget::OpenSpillway added — success (open low ground,
complete carved path) split from EdgeUnreachable (strict search exhaustion);
both doc comments exact; test updated. Tyre C3: determinism docstring
corrected (no BTreeMap; the endorheic f64 gate stated as deterministic-by-
derivation). Hoshe H1: vacuous cliff_edge test replaced by
single_basin_bowl_never_carves_a_gorge asserting the known-empty outcome.
Hoshe H2/H3: courses-force-empty disclosure at rect_window_replica and in
the results doc; courses.len() print added to the square production-fn
bench — measured 3/6/10 courses in window (NOT courses-empty, verified
twice); 'faithful stand-in' claim retracted for a precise scope statement;
GJ1c 18-course run identified as the sole production-density rate. Tyre C1:
appendix (4) headline rephrased — the tagged-envelope migration cannot be
dodged by payload optimization (byte math), field-count-rule trigger is a
workshop synthesis call; appendix (2) scope split per-shape.
Hydrology unit suite 15/15; atlas lib suite 679 green; benches compile.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
cargo fmt across the four new files; needless_range_loop x2 (enumerate /
iter_mut) and identity_op in hydrology_equilibrium.rs. cargo test was green
on the bounced push — lint-only fixes.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
bmv_gridunit_bench: production build_district_window_layer par_iter path at
330K/2.07M/8.3M cells (throughput holds, ~190-220 ns/cell parallel), block
(128m) and tile (1m/4m) spacing costs, the 83K-cell deepest-step viewport
shape, and the verified zero-savings octave-cutoff finding below District
spacing. wire_encoding_bench: real GJ338Bd derived canvases through
derive_at_metres, five encodings (raw rmp / bit-packed / RLE / PNG-per-field
/ PNG-of-packed) with measured bytes + encode/decode round-trips; corrected
raw density 6.00 B/cell. All #[ignore]d release tests.
Workshop gate measurements (2)(3)(4) for body-map-viewer.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Priority-flood fill with basin grouping, topographic-saddle spill points,
moisture-governed endorheic classification (reuses the reserved
RIVER_DOWNSTREAM_TERMINAL sentinel), and Dijkstra overflow/carving. Pure
function of (elevation, sea_level, climate) — deterministic per D-010, no
stateful simulation. 15 unit tests incl. determinism proofs and direct
carving-mechanism verification; #[ignore]d release benches at 512x256 /
768x432 / 3840x2160 plus the 273-bodies-parallel production shape.
Workshop gate measurement (1) for body-map-viewer: settled hydrology is
VIABLE per body-open (~24 ms at 512x256; ~0.7-0.8 s all 273 bodies).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The apparent course-over-drawn-water contradiction resolved to two
reconciliation errors, neither in production: (1) the probe's first
reconstruction bypassed the request layer's wire clamp (Quarter n=32
serves as n=16 — build_district_window_layer trusts n verbatim by
doc); (2) the lead's capture read overestimated — the window frames
only the estuarine tail of a 213-station course (178 land stations
out of frame upstream; the visible water run is genuine Lake/
OpenOcean paint, RGB-verified against MORPHOLOGY_RGB_OPAQUE x
elevation-lightness) and the terminus sits ~240m from the painted
land->water crossing, not tens of km. Walk and paint agree at every
instrumented position (zero flip-flops across the monotonic 178-land/
35-water station sequence). New permanent test reproduces the exact
live window (real GJ380c + systems.db params, district (13195,-2383),
Quarter, clamped n=16; asserts 44 pts + Mouth as identity) and pins
the terminus-lands-in-painted-water invariant mechanism-agnostically;
revert-verified with an injected 500km positional slip. Probe
deleted. cargo test --lib 1878/1878.
Tickets: T-1170
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The live acceptance question (Mouth flag apparently not surviving
crop) resolved to hypothesis (b): the terminus genuinely lay outside
both test windows — the Lendel mouth chord is ~108.5km, not the ~38km
estimated, so a District n=32 window centered on the cell OR the
midpoint misses the bisected waterline; a seaward-cell-centered
window provably ships Mouth. Hypothesis (a) — upstream-only crops
collapsing the flag — was FALSIFIED directly with a constructed
window (upstream anchor cut, true terminus in range -> Mouth ships;
crop reads only last_in). This test converts that probe into a
permanent pin with construction-sanity asserts, closing the blind
spot where the existing GJ1c acceptance test's bbox-derived window
always contains the whole course. Revert-verified: reintroducing a
first_in==0 requirement fails this test by name while the whole-
course test blindly passes — exactly the gap. Probe file deleted.
cargo test --lib 1877/1877.
Tickets: T-1170
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The batch's real bug: extract_river_network computed the seaward
neighbor (nr,nc) to decide the MOUTH sentinel then discarded it, and
build_edges placeholder-pointed mouth edges at themselves — zero
chord, invent_course's degenerate 1-point return, resolve_mouth_
terminus dead code on real data, ALL real mouths resolving None, and
(because Ruling 3g retired the D/Q clip on the promise of real
termini) mouths vanishing at District/Quarter. The second instance of
the threw-away-the-answer anti-pattern Ruling 2b fixed for interior
pointers. Fix: river_seaward: Vec<(u16,u16)> on RiverNetwork
(additive, serde-default, parallel array; meaningful only at MOUTH
entries), captured in the same extraction pass; build_edges gives
Mouth edges the real one-D8-step chord. Permanent acceptance:
all_real_gj1c_mouths_resolve_to_mouth_terminus_not_none — 3/3, revert-
verified failing at the golden's first mouth (38,47). Mouth golden
coverage added (river_course_golden gains district_mouth/quarter_mouth
samples + non-degeneracy test; the previously Interior-only filter
gap closed). Tyre 1: the land-probe's dead dx/len*len arithmetic
replaced — station_spacing_m threaded through the crop path, probe
steps one real cell spacing, comment reconciled. Tyre 2: boxing
comment reattributed to variant-size balancing (Layer1Output retention
lives on TerrainAnalysisCache, not BodyWorldState). Hoshe #4:
cascade_golden's doc now states the attractor cascade accurately
(count-parity, not byte-identity — water_dist seeds from mouths).
Full cargo test green; goldens re-pinned deliberately; bench +3.0%.
Tickets: T-1170
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Tyre's two governance sentences on the D-226 course note: (a) the
Godot rasterizer floor makes per-class course WIDTH differentiation
inert at every shipping fit zoom — classes distinguish by opacity
alone until T-1175's per-vertex tapering; the 'trunk widest' promise
is design intent, not current pixels. (b) The pole-row edge-drain
branch is structurally unreachable; the real mechanism is interior
k<0 (revert-verification discovery). Plus the dangling cargo-fmt
reflow in the course-cost bench from the gate-bounce round.
Tickets: T-1170
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
A2 (river_course.rs): Stage A rung-independent valley-seeking control
path (chord/8 stations, k=5 bilinear-scored candidates + continuity
penalty); Stage B rung-indexed perpendicular warp on GLOBAL arc-length
(window-independence, Ruling 1e), band chord/2 down to min_wavelength_m
hard-truncate, sine taper to zero at anchors, amplitude min(8% chord,
half-cell) slope/class-scaled. SeedDomain::RiverCourse=17, distinct
salt. Wire: RiverCourse{edge_id,class,points,terminus} on
DistrictWindowLayer.courses (serde-default); bbox-culled, window-
cropped +1 station. TerrainAnalysisCache retains Layer1Output (the
gen_queue:626 discard, Ruling 4b). A3: mouth termination walks
stations sampling the window's OWN rung-consistent morphology verdict,
6-iteration bisect; land-at-anchor probes one segment then None;
EdgeDrain never probes. A5: near_perennial_water point-to-segment
predicate (D-239 §8 governed bands 1-3m class-scaled) threaded through
both batch and window paths; Region always false; never touches
moisture_q. Discipline closed: dormant zoom-ladder bench run + numbers
recorded in the design doc (District 3.009/1.785, Quarter 1.823
us/cell, Region window 0.617ms); course-cost bench CAUGHT a real
+12-36% per-cell riparian scan regression -> precomputed bbox O(1)
reject (60ns->2.2ns/call), final delta +3.4-6.9% at budget; three
determinism tests (overlapping-window byte-identity, cross-rung
amplitude bound, warp-stream cross-correlation r<0.3); goldens: window
sweep gained a verified course-bearing position (pure append), new
river_course golden at both rungs, believability verified unchanged.
Revert-verification discovered the pole-row branch is structurally
unreachable (flow_direction bounds-check) — the real edge-drain path
is k<0 flat-plateau; test fixture rewritten to exercise reality.
scale.rs stale comment fixed. Full cargo test green.
Tickets: T-1170, T-1168
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
RiverNetwork gains river_downstream: Vec<u8> (serde-default, parallel
to river_cells): values 0-7 index drainage::D8 (row,col deltas, N/S/E/
W/NE/NW/SE/SW order); sentinels MOUTH=8, EDGE_DRAIN=9, TERMINAL=10
(reserved — the future endorheic-basin hook, Ruling 2c/7b). Captured
in extract_river_network's existing pass (fdir already in scope, one
map, no new grid pass). Pole-edge D8 exits reclassify as EDGE_DRAIN
and leave the mouths list (Ruling 3f); flat-peak interior no-outflow
cells get EDGE_DRAIN too. cascade_golden deliberately re-pinned: GJ1c
mouths 19->3 — sixteen were pole-edge artifacts, exactly Jeroen's
'circles with no sea in sight'; river_cells/attractors counts
unchanged (pure reclassification + additive field). 21/21 drainage
tests incl. mouth-sentinel/mouths-list bijection on the real fixture
and a synthetic pole-draining-grid case.
Tickets: T-1170
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The one additive server change of wave 1 per Tyre's carrier ruling:
river_class: Vec<u8> parallel to river_cells, serde-default-safe, no
new wire field. Log-scaled binning between RIVER_THRESHOLD and the
RIVER-RESTRICTED max accumulation (max over cells passing the is_river
elevation filter — NOT the grid-wide max, which peaks past the
coastline on wet large-ocean bodies and would starve the trunk class
exactly where Araminta's District-shows-trunk-only table needs it;
caught in lead review of round 1, fixed round 2). Log not linear
because accumulation grows combinatorially downstream. By construction
every body with rivers has trunk cells — pinned by a non-synthetic
regression on the committed GJ1c heightmap at the golden's exact
downsample. cascade_layer1.json regenerated: every pre-existing field
byte-identical (python-verified), only the new river_class arrays
added — GJ1c distribution stream 72 / tributary 18 / trunk 3.
drainage 16/16 (+10), layer1 3/3, layer_proxy 50/50, build --tests
clean; revert-verified (non-monotonic binning fails the monotonicity
test by name).
Tickets: T-1156
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
DISTRICT_MIN_WL_M's doc in window_derivation_golden.rs still carried
the 'NOT 2×DISTRICT_M by coincidence alone' framing the I1 fix
inverted everywhere else — now states the rung authors the floor and
the terrain-octave coincidence is guard-pinned, matching the rewritten
MIN_WL_BANDS_M and coast_invention docs.
Tickets: T-1162
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Tyre's I1 (his ruling: the cutoff's job is Nyquist, a property of the
RUNG): MIN_WL_BANDS_M's District band now derives from 2*DISTRICT_M
directly, decoupled from OCTAVE_WAVELENGTHS_M[3] — a detail_scatter
retune can no longer silently redefine the Atlas rung floor. Direction-
agnostic const assert pins the coincidence so drift on either side
breaks the build for a deliberate human decision; golden_cutoffs_match_
the_scale_ladder now pins the District coupling too. I2: D-226
paraphrase replaced with cites to the T-1150 wire-contract note +
T-1162 refinement resolution (2), plus a self-found stale 2048m claim
fixed in the same comments. I4: golden extended with airless/dry
(ceiling_q==0 short-circuit) and volcanic-coast (ridged warp) body
rows via body_sweep_samples() — fixture regen verified 510 insertions,
0 deletions (existing rows byte-identical, purely appended). Q2 nit:
vegetation_invention module doc now states majority-preservation as
the coherence guarantee, not per-cell class stability (a boundary
cell's flip IS the clearing mechanism). Forward-contract for T-1156:
0x5EED_C0DE promoted to named WINDOW_RELIEF_SALT const. 158 focused
tests green; cargo check --tests clean.
Tickets: T-1162, T-1161
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The octave extension changes derived window output by design (coast
crinkle below 16384m, voxel relief at Quarter, vegetation moisture
perturbation) — this regen records the sanctioned new baseline per the
ticket's part (d) discipline. The pre-existing BELIEVABILITY_STRICT=1
'vegetation present' advisory failure predates this change (Q-123-
tracked debt) and is unaffected.
Tickets: T-1162
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Coast: WARP_OCTAVE_WAVELENGTHS_M 5->9 entries (262144m down to 1024m,
Quarter's Nyquist floor) with new min_wavelength_m cutoff plumbing in
coast_warp_px/warp_fbm (the warp previously had no cutoff at all).
Relief: invent_primitives feeds the VOXEL band (1024-128m, salted) into
elev_q/slope_q under the same envelope/cutoff discipline. Vegetation:
new vegetation_invention module — two-tier (BodyParams+latitude envelope
ceiling; single blended fBm field, never-gated 100-400km massif tier at
70% + cutoff-gated district/voxel texture at 30%) perturbing moisture_q
OUTPUT so precipitation/glaciation/vegetation shift as one world-fact;
wire format unchanged. MIN_WL_BANDS_M 5->6 (adds 1024m band).
Mid-implementation correction caught by tests: District's quantized
floor is 4096m (OCTAVE_WAVELENGTHS_M[3]), not 2x DISTRICT_M — the 8192m
and 4096m coast octaves are legitimately District-admitted enrichment;
only 2048/1024m coast + the voxel band are Quarter-exclusive. Docs and
golden cutoffs corrected to match.
New golden: tests/window_derivation_golden.rs + fixture (derivation_
harness pattern, UPDATE_GOLDEN=1 regen) with structural guards pinning
Quarter/District divergence. Bench (zoom_ladder_bench, release): no
regression — all rungs at or below baseline (District c0 3.54->~3.0
us/cell, Quarter 2.10->1.77, orbital 1.48->1.42, n=6400 window
0.86->0.59 ms). Revert-verified voxel_relief cutoff exclusion. Server
lib 1840 passed; new module 11 tests; district_profile 84 (+6, 1
noise-fragile pre-existing test properly fixed via 8-district
latitude-band averaging).
Tickets: T-1162
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Dudley's audit of the suspected ConnectionId(0) starvation: exhaustive
trace of the delivery path (bridge/mod.rs insert/lookup/send paths,
atlas plugin serve/drain, gen_queue coalescing) found NO sentinel or
default-value collision — ConnectionId doesn't even derive Default, and
every id path is a plain monotonic allocation with linear lookup. The
real gap was coverage: every existing window test used ConnectionId(1).
New connection_zero_window_delivery module replicates main.rs's actual
bootstrap (blocking first-accept -> BridgeResource -> accept loop) and
pins: the first-ever connection receives a district window; the exact
six-tile entry shape delivers all six to connection 0; connection 1
keeps working. 5/5 repeated runs, single- and parallel-threaded.
The live 'starvation' itself was client-side (pending responses never
re-requested on the tile path — separate fix in flight); these tests
stay as the server half's permanent pin.
All Hoshe/Araminta findings addressed (Tyre approved outright), none
retracted — plus a Dudley stop-and-flag discovery that improved on the
asked-for fix:
- Legend 100x lie (Araminta, blocking): subtitle computed via
spacing_for_rung() and refreshed at all three _held_granularity_v2
write sites. Region test asserts 204.800 km/cell; the District
direction needed a stale-header-aware helper — a District-only test
spuriously passes against the old literal by coincidence.
- Region coalescing coverage (Hoshe 1): both directions tested
(Region-vs-District separate slots; Region-vs-Region coalesces).
- Clamp boundary tests + dangling citations (Hoshe 2): writing the
requested halving-loop-fires test surfaced that the loop is PROVABLY
UNREACHABLE at current constants (per-axis clamp forecloses it —
brute-forced independently on both server and client sides). Ruling:
the loop stays as defensive code; the test became a property sweep
pinning both the wire-cap invariant and the loop's no-op status (a
future constant change breaks it loudly); doc comments on both sides
drop the load-bearing framing and state the truth; the old client
mirror test that claimed the loop fires (passing on the per-axis
clamp alone) is replaced the same way. Client citations now name the
real server tests verbatim.
- Governance (Tyre): D-226 amendment note — progressive cross-rung
refinement EXTENDS T-1124 §4 (not supersedes); legacy u32 field
scheduled for retirement (T-1159).
Server: 1818 lib tests green, clippy/fmt clean. Client: zoom_ladder
48/48, window_request 26/26, viewer 74/74; gdlint clean. Every fix
revert-verified.
R1 measured first: a capped Region tile through the real production path
(build_district_window_layer + T-1151 par_iter) at the 64x64 wire cap
costs 0.40-0.48ms — faster than the shipped district n=64 window, so
Jeroen's progressive capped-density tiling ruling is comfortably
interactive on-demand. Raw orbital derive ~0.9µs/cell (~2.3x faster than
full derive; region_baseline dominates, not invent_primitives).
R5 redesign: WindowGranularity enum (Quarter/District/Region), serde
named-variant per the RoadNodeKind precedent, spacing from D-243 scale::
constants — the single source of truth. Additive serde-default
window_granularity_v2 request field (None = legacy u32 path; v2 wins when
Some); DistrictWindowLayer.granularity_v2 always echoed. Legacy u32 echo
for Region uses reserved WINDOW_GRANULARITY_REGION_KEY = u32::MAX (never
a legal input) so the old slot cannot lie about aliasing. Cache and
coalescing keys carry the enum itself (Ord by declaration order, D-010).
n stays district-extent at every rung; Region's cell grid is a DIVISION
(round(n/100), min 1) with its own per-axis ceiling
DISTRICT_WINDOW_MAX_N_REGION=6400 and a bounded halving-loop clamp (no
closed form under the rounding division — the client mirror must
replicate the loop).
derive_orbital_at_metres: bilinear envelope reads + region_baseline
temperature, NO invent_primitives (proven by test — slope_q pinned 0),
routed through the shared build_district_profile classification tail so
the existing colorizer family renders orbital cells unchanged. R2
stepped-categorical behavior documented at the function, not implied.
Region aliasing + clamp/echo tests mirror the T-1150 discipline. 1813
lib tests green; clippy clean; fixture regenerated (254->278 bytes, new
echoed field).
All seven Hoshe/Tyre findings addressed, none retracted:
- n-clamp/echo/staleness triangle (Tyre C1): client _clamp_window_n_mirror
(bit-for-bit twin of the server clamp, canonicalize_district_center
precedent) applied before _n is stored/sent; server test pins the
quarter n=32 -> echo 16 contract.
- min_wl band quantization (Hoshe 1/Tyre C3): quantize_min_wl_m snaps to
MIN_WL_BANDS_M {0, 32768, 16384, 8192, 4096} before cache key and echo
(design doc §5's unbounded-key fix), reusing the one true
OCTAVE_WAVELENGTHS_M array; docstrings now state the server-quantizes/
client-sends-raw split; same-band cache-sharing test.
- coalescing granularity axis (Hoshe 2): two tests pin different-
granularity requests as separate in-flight slots and same-granularity
coalescing unchanged.
- orphaned fixture (Hoshe 3): test_protocol.gd consumer decodes
atlas_response_ready_with_window.msgpack through the real IPC path and
asserts the new fields.
- atlas_window_request coverage (Hoshe 4): new test file — stale-drop on
granularity mismatch, old-server-shape defaults accepted, clamp mirror
formula + wiring. First draft's quarter-via-request_now test would have
passed for the wrong reason (request_now resets granularity by design
until T-1153) — split into formula pin + reachable-path wiring proof.
- granularity type seam (Tyre C2): field + resolver docstrings state
finer-only integer multiples with resolve_window_granularity as the
single widening point; matching contract note added to the D-226
T-1143-rulings amendment.
cargo --lib 1807/1807; goldens bit-identical; gdlint clean.
T-1151: build_district_window_layer dispatches one Rayon task per row
(pure derive_window_cell via derive_at_metres), scattered row-major into
the flat arrays; a cfg(test) serial path backs the bit-identical
parallel-vs-serial golden.
T-1150: serde-default window_granularity (1=district, 4=quarter) +
window_min_wl_m on AtlasLayerRequest — additive, no sixth demux shape,
old frames decode unchanged (tested). Quarter mode = full
reclassification at 512m spacing over the same world rect ((4n)x(4n)
cells); WIRE_CAP_CELLS=4096 enforces n*granularity <= cap (quarter
clamps n to 16, the design doc's worked example). Granularity + min_wl
key ALL five touch points: DistrictWindowLayer echo, server FIFO-256
cache key (now a 5-tuple), per-connection coalescing key, client
request codec (omitted-at-default wire fields), client LRU key.
Mandatory aliasing regressions on both ends: identical (body, center, n)
at granularity 1 vs 4 produce distinct cache entries and correct
per-granularity payload shapes (server, 3-thread queue to avoid the
AnalyzeBody thread contention found while writing it) and distinct
client cache keys (gdUnit). Replay fixture regenerated — the layer
struct grew two echoed fields (231->254 bytes, content verified).
Client requests stay district-granularity by default — quarter requests
arrive with T-1153's rung selection.
Extract derive_district's fractional-metres interior into the metres-
addressable derive_at_metres(seed, body, params, ta, wx, wy, climate,
min_wavelength_m) — the zoom ladder's keystone (design doc §8 step 1).
derive_district is now a thin DistrictPos-quantizing wrapper calling it
with cutoff 0.0; all four golden/believability/derivation harnesses pass
byte-identical.
enveloped_fbm/terrain_detail/voxel_relief gain min_wavelength_m: octaves
below the cutoff are hard-truncated (amp still advances so surviving
octaves keep relative weight; norm==0 guarded). Amplitude-fade-near-
cutoff is documented as a seam, not built — the pop-risk A/B needs the
client ladder (T-1153). Cutoff 0.0 is bit-identical to pre-change
output, asserted by test.
Measured (release, 4096-cell sweeps, zoom_ladder_bench.rs): district
spacing 1.200µs/cell (cutoff 0) / 1.201µs (cutoff 2048m — all octaves
survive, plumbing check); quarter spacing 1.165µs/cell (cutoff 512m).
Matches the design doc's ~1.2-1.4µs/cell release estimate.
Hoshe's finding: the flag introduced so auto-fit never fights a manual
view had zero coverage on exactly that branch. Two tests drive the
REAL _gui_input path (synthetic drag), then fire NOTIFICATION_RESIZED:
user-adjusted view survives a resize untouched (zoom AND offset);
an unadjusted view re-fits to the new viewport. 52/52.
Non-blocking doc note also taken: layer_proxy's normalization comment
claimed the twins would otherwise 'coalesce independently' — the
coalescing key is (ConnectionId, body_id) and never carried center;
rewritten to say what normalization actually buys on that path (the
work item derives and echoes the canonical center).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The server clamped window_n but trusted window_center — the letterbox
bug's impossible (12276, 3021) was derived at clamped-garbage latitude
and CACHED under its raw key. normalize_window_center mirrors the
forward map exactly (column rem_euclid against the body's district
circumference, row clamped to +/-half-meridian; constants from
scale::DISTRICT_M, no new magic numbers; no-radius test bodies
identity). Applied in serve_district_window BEFORE the window-cache
key and the coalescing key, so an insane request and its sane twin
share one entry — proven end-to-end with the literal bug values on a
500km fixture body resolving to canonical (4, 383), byte-identical.
Echo contract: DistrictWindowLayer.center now carries the NORMALIZED
value. Reconciled by design with the client half in this same branch —
the client canonicalizes before sending (bit-identical math, posmod ==
rem_euclid verified), so request and echo agree from the first
round-trip; server normalization is defense-in-depth for buggy or
modified clients.
6 new tests incl. the twin-cache proof and the echo pin; atlas::
570/570, lib 1784/1784, timing-sensitive tests 3x stable.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
