Task 1: the D-03 gate script (measure-optimality-gate.mjs) reads the frozen
pre-ALT record, re-routes the same coordinate-pinned pairs on the current
ARG2 binary, and gates on seconds-equality (±0.1%) + verdict-class
preservation — never on node paths (equal-cost ties are documented behavior).
Rule-1 deviation the gate forced on its first run: routeAstar returned
SUBOPTIMAL real-graph routes (x038: 1234.6s vs the 1214.8s Dijkstra optimum;
x045: 1475.5s vs 1460.6s) — the fixture sweep could not see it. Root cause:
the fromTable bound d̂(ℓ,t) − d̂(ℓ,v) is one-directional Lipschitz (its u-side
term needs the REVERSE edge; a oneway does not provide one — the anchor
reached node 264611 126.8s faster than its own 1.49s upstream neighbour
264610), and the shared Ikeda average p = (h_f − h_b)/2 is consistent only
when every family inside h_f/h_b is two-sided. The toTable bound
d̂(v,ℓ) − d̂(t,ℓ) rides stored traversable edges in BOTH directions; it alone
joins the haversine now. Stop rule, reductions, meet probes, reconstruction:
untouched. landmarkTables/build verified EXACT (0 mismatches vs independent
integer Dijkstras, both rows, all 24 anchors).
- measure-optimality-gate.mjs: exported core + CLI guard (route-corpus
pattern); epsilon mirror + argVersion asserts precede any measurement;
per-pair rows, extract-drift WARNING (never a re-record), honest exit law
- astar.ts: potential() consults landmarkTo only; doc-comments carry the
one-directional-Lipschitz law and the x038/x045 evidence
- astar.test.mjs: A11 re-pinned (landmarkFrom must NOT appear in the
comment-stripped search — re-adding it trips the pin); A12 oneway-ring
sweep added (directed reach asymmetry stays Dijkstra-equal on every pair)
Battery: routing 80/80, bot 126/126, both typechecks green.
D-03 gate: GATE PASS — 53/53 routed pairs equal within ±0.1% (max |Δ| 0.005%),
verdict classes preserved (6 unreachable + 41 unsnappable, 0 re-snapped).
- routeAstar's ONLY change: the h_f/h_b bodies become max(ALT triangle
bounds, haversine) — per-search Float64Array(L) constant tables in quanta
(0xFFFF written as NaN = search-scoped landmark drop), lazy per-node
max over the four triangle families with RAW u16 sentinel compares
BEFORE any float conversion, haversine max-fallback on sentinel-flooded
nodes (Pattern 3 containment)
- the (h_f - h_b)/2 combination, reductions, balanced alternation, meet
probes, BH stop rule, and real-seconds reconstruction are byte-identical
(research Pattern 1 — the survey's (pf-pr)/2 is what p_f already is)
- no Map/Object allocations (A8 green), no new imports, one search path
(L >= 1 is the decodeGraph guarantee, D-01)
- A1's 625-pair Dijkstra-equivalence sweep re-pinned under ALT: the
standing optimality proof; A9 island + A10 skip laws sealed; A11
structural pin green
- module header + routeAstar doc gain the ALT paragraph (c-metric
exactness, sentinel laws, Ikeda history intact)
- upload-road-graph.mjs: wrangler-shelled maintainer tool (pre-flight 1-80MB,
round-trip verify hint); bucket araharah-graphs NOT created — R2 is not yet
enabled on the account (wrangler code 10042) — dashboard one-time activation
is the phase's user_setup item
- measure-route-cpu.mjs: 25-pair gate (corpus + seeded quadrant spread),
hrtime around routeAstar, warm-up excluded, unreachable probes reported
SEPARATELY from the routed p95, exits 1 over the 8ms budget
- Rule 1 (measured): the class set lacked *_link ramps — the graph FRAGMENTED
(7.7% of nodes in severed motorway islands; corpus pairs 'unreachable').
5 link classes added -> 311325 nodes / 677068 edges / 14.7 MB, all landmarks
in one component; enforced floor corrected 1KB -> 1MB (D-01)
- ladder (a) drop tertiary+residential: p95 17.8ms but 12/25 pairs unreachable
— REJECTED on correctness (D-03), reverted, ladder history recorded
- ladder (b) bidirectional A* (BH, Ikeda potentials, reverse-CSR WeakMap):
provably optimal (A1 625-pair sweep green), alternation balanced by heap
size (raw-top comparison starves the backward side 19501:3), reduction
signs in the standard feasible form. Measured: p95 ~38-93ms — NO GATE PASS.
The potential split halves each side's steering, cancelling the halved radius
- GATE FAIL is the honest verdict: ladder (c) — Workers Paid vs layout-v2 ALT
(still $0) vs free-plan-with-degradation — requires maintainer sign-off;
docs/ROAD-GRAPH.md carries the decision table and the fork contract
araharah-executor