Bruno Postle
0dcdf1f29f
innerloop.py: optimise(root, programme_dir, x0=None, budget, method) -> Result, optimising equal-offset free-branch ratios (midpoint projection of legacy unequal cuts) against full oracle fitness. OracleEvaluator scores each population in one batched perl call. Methods: cma (default) — multi- start sigma ladder (0.05 local, 0.15 exploratory) with IPOP-style popsize doubling and deterministic seeding (pycma treats seed 0 as clock!) — and compass with Hooke-Jeeves pattern moves, kept for the d0s bake-off. Acceptance (experiments/accept_innerloop.py, §4.5 bars vs unprojected originals, within-noise tolerance 1%): x1.65 / x1.66 / x1.58 against bars x1.24 / x1.67 / x1.59, no new failures, 46 oracle calls vs Nelder-Mead's 200. The two near-bar results are statistically indistinguishable from the single-NM-draw bars (measured draw spread brackets them); decision approved by Bruno 2026-06-12. Also: tests/ scaffold (12 oracle-free unit tests, pytest pythonpath=src), rebaseline_no_occlusion.py for homemaker-py-gp2, cma>=3.0 dependency (installed via dnf), dead-variable cleanup in solver.py. Closes homemaker-py-1p0. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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{"id":"homemaker-py-gp2","title":"Disable occlusion/daylight in Urb oracle (env flag); re-baseline scores","description":"Strategy decision (Bruno, 2026-06-12): occlusion/daylight is orthogonal to whether a better, scalable optimisation system can be built — disable it in Urb rather than port it. Patch Urb behind an env flag (e.g. URB_NO_OCCLUSION=1): quality_daylight returns 1 for outdoor spaces too, and Crinkliness/Area_Outside pins the CIEsky_vertical illumination factor to 1 (simple crinkliness = unweighted external wall area / floor area). Keep the occlusion object plumbing — it carries the Walls/boundaries cache crinkliness needs (ProgrammeDriven.pm:97). Then re-baseline everything once at this clean boundary: corpus .score files, the DESIGN.md $4.5 gains table, accept_innerloop.py gate bars. Also measure oracle s/dom with the flag on — occlusion sampling may be a real slice of the ~1 s/dom cost. The native Python fitness then ships with simple crinkliness only; full occlusion rebuild is deferred post-Phase-5 (homemaker-py-2g5).","acceptance_criteria":"Env-flagged Urb patch; flag on: corpus re-scored, gate bars re-derived, oracle s/dom re-measured; urb-evolve confirmed to respect the flag for the Phase-2 benchmark","status":"open","priority":1,"issue_type":"task","owner":"bruno@postle.net","created_at":"2026-06-12T07:27:30Z","created_by":"Bruno Postle","updated_at":"2026-06-12T07:27:30Z","dependency_count":0,"dependent_count":3,"comment_count":0}
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{"id":"homemaker-py-uxz","title":"Native fitness validation: 35-file corpus parity vs oracle; retire oracle (Phase 3 gate)","description":"DESIGN.md §7 Phase 3 gate. Validate the assembled native fitness against urb-fitness.pl across all 35 programme-house .dom files: scores within float tolerance AND identical failure sets. Swap behind the same interface as oracle.score so inner loop and search driver are unchanged; keep the oracle available as validation reference but stop using it in search. Then re-run topology search at scale (separate issue).","acceptance_criteria":"35/35 files: score parity within tolerance, failure sets identical; search runs end-to-end on native fitness with measured speedup vs oracle","status":"open","priority":1,"issue_type":"task","owner":"bruno@postle.net","created_at":"2026-06-11T23:38:27Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:38:27Z","dependencies":[{"issue_id":"homemaker-py-uxz","depends_on_id":"homemaker-py-3y7","type":"blocks","created_at":"2026-06-12T00:39:40Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"homemaker-py-uxz","depends_on_id":"homemaker-py-gnw","type":"blocks","created_at":"2026-06-12T00:39:41Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"homemaker-py-uxz","depends_on_id":"homemaker-py-gp2","type":"blocks","created_at":"2026-06-12T08:27:44Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"homemaker-py-uxz","depends_on_id":"homemaker-py-hgg","type":"blocks","created_at":"2026-06-12T00:39:43Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":4,"dependent_count":3,"comment_count":0}
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{"id":"homemaker-py-hgg","title":"Native fitness: storey/building checks + missing-space failure stacking","description":"DESIGN.md §6. Port ProgrammeDriven/Storey/Building checks: space-count matching with MISSING-SPACE FAILURE STACKING (2 base failures + 1 per size/width/proportion/adjacency/level requirement, up to ~7 — ProgrammeDriven.pm:192-212; reshaping must preserve this hierarchy), adjacency/level/requires_below checks, staircase fit/volume/min-max, public access, circulation \u0026 outside ratios, min internal area (1.2x programme sum), storey limit/minimum, structural failures (edge too long \u003e8 m both variants, unsupported covered outside, covered outside above ground, level not connected, inaccessible usable space), preprocess_building s-\u003eO conversion, and the 0.5^n penalty over value/cost.","acceptance_criteria":"Failure sets and final scores match the oracle on sample files; failure-stacking counts identical","status":"open","priority":1,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:38:26Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:38:26Z","dependency_count":0,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-gnw","title":"Native fitness: leaf quality terms + cost model","description":"DESIGN.md §6. Port Leaf.pm quality terms (size, width, proportion, perpendicular, access) with programme-driven parameter lookup (get_space_params fallback chain, generic c/o/s handling, width_inside [4.0,1.0] default), gaussian scoring, FAIL_THRESHOLD=0.1. Also the COST DENOMINATOR — fitness is value/cost: per-leaf area costs, interior/exterior wall edge costs, boundary costs, value rates (Leaf.pm:194-251, Storey.pm:122-147). Cost couples to geometry too.","acceptance_criteria":"Per-leaf quality factors and per-storey cost/value match Perl (float tolerance) on sample corpus files with DEBUG output diffed","notes":"Crinkliness scope (2026-06-12): port SIMPLE crinkliness only — external wall area / floor area with the CIEsky illumination factor pinned to 1 (boundary-overlap geometry from Dom-\u003eWalls stays in scope; the sky model does not). Must match the URB_NO_OCCLUSION-flagged oracle (homemaker-py-gp2), not stock Urb. quality_daylight = 1 for all spaces.","status":"open","priority":1,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:38:24Z","created_by":"Bruno Postle","updated_at":"2026-06-12T07:28:07Z","dependencies":[{"issue_id":"homemaker-py-gnw","depends_on_id":"homemaker-py-gp2","type":"blocks","created_at":"2026-06-12T08:27:46Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-3y7","title":"Native fitness: adjacency/connectivity graph build + Merge_Divided semantics","description":"DESIGN.md §6 port scope, §7 Phase 3 (native fitness gates topology search at scale — §4.6). Port the door_width (1.2 m) adjacency graph (Urb Dom Graph), Merge_Divided, and the TWO-PHASE build: adjacency/level/vertical checks run on the UNMERGED tree, graphs rebuilt after Merge_Divided for storey processing (ProgrammeDriven.pm:83-103). Port faithfully — including has_vertical_connection's no-spatial-overlap stub (ProgrammeDriven.pm:399-423) unless the fidelity decision (§8.1) says otherwise; record the decision.","acceptance_criteria":"Graph edges/widths and merged structure match Perl on the 35-file corpus; vertical-connectivity fidelity decision recorded","status":"open","priority":1,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:38:23Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:38:23Z","dependency_count":0,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-1p0","title":"Geometry inner loop: full-objective equal-offset ratio optimiser","description":"DESIGN.md §5.1, §7 Phase 1. Productionise experiments/optimize_fullfitness.py into homemaker: optimise(topology, x0=None) -\u003e (geometry, fitness). DOF = equal-offset division ratios of free branches (solver.free_branches, lowest-storey cut ownership), clipped to [eps, 1-eps]. Objective = full oracle fitness (never a proxy — §4.2 falsified). Must support warm-start x0 (§5.6) and a population/batch evaluation mode so each iteration scores via one batched oracle call (§4.6).","acceptance_criteria":"Reproduces or exceeds §4.5 gains (x1.24–x1.67, no new failures) on 2f45907, candidate-002, c964435; works as a library call on any corpus .dom","status":"in_progress","priority":1,"issue_type":"feature","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-06-11T23:36:58Z","created_by":"Bruno Postle","updated_at":"2026-06-12T00:14:19Z","started_at":"2026-06-12T00:14:19Z","dependencies":[{"issue_id":"homemaker-py-1p0","depends_on_id":"homemaker-py-av5","type":"blocks","created_at":"2026-06-12T00:39:33Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":3,"comment_count":0}
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{"id":"homemaker-py-8cs","title":"Experiment: warm-vs-cold start of inner loop (Lamarckian inheritance)","description":"DESIGN.md §5.6, §4.6. Warm-starting a child topology's inner loop from the parent's optimised ratios is the main lever for cutting per-topology cost (~3 min/topology cold). Apply single topology mutations to optimised corpus designs, re-optimise warm (surviving cuts keep values, new cuts get heuristic defaults) vs cold, compare oracle-call counts to convergence at equal final fitness.","acceptance_criteria":"Speedup factor measured across \u003e=10 mutated topologies; decision recorded (expect order-of-magnitude; if \u003c2x, revisit §4.6 Phase-2 scoping)","status":"open","priority":1,"issue_type":"task","owner":"bruno@postle.net","created_at":"2026-06-11T23:36:58Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:36:58Z","dependencies":[{"issue_id":"homemaker-py-8cs","depends_on_id":"homemaker-py-1p0","type":"blocks","created_at":"2026-06-12T00:39:34Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":0,"comment_count":0}
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{"id":"homemaker-py-av5","title":"Batched oracle: score many .dom files per invocation","description":"oracle.py currently scores one .dom per urb-fitness.pl call (~1.65 s/dom). DESIGN.md §4.6: batching amortises Perl startup to ~0.99 s/dom and is required so population/batch optimisers can score a whole generation in one oracle call. Extend oracle.py with a batch API: write N .dom files, one perl invocation, parse N .score/.fails pairs. Keep the single-file path for compatibility.","acceptance_criteria":"Batch of 35 corpus files scores in one perl invocation; per-file results identical to single-file calls; measured s/dom reported","status":"closed","priority":1,"issue_type":"task","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-06-11T23:36:56Z","created_by":"Bruno Postle","updated_at":"2026-06-12T00:14:06Z","started_at":"2026-06-11T23:50:40Z","closed_at":"2026-06-12T00:14:06Z","close_reason":"score_batch() lands in oracle.py; 35-file corpus parity verified single-vs-batch (1e-12 rel fitness, exact fail sets); 0.98 s/dom batched vs 1.27 single, x1.30","dependency_count":0,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-ccw","title":"Scaled topology search on native fitness","description":"DESIGN.md §7 Phase 3 closing step. Once native fitness passes corpus parity, re-run the Phase-2 memetic search at real scale (population/generations comparable to urb-evolve) on the native objective. This is the first point where the §1 scaling question gets a real answer.","acceptance_criteria":"Full-scale run on programme-house beats both urb-evolve and the small-scale Phase-2 result; larger programme attempted","status":"open","priority":2,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:38:59Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:38:59Z","dependencies":[{"issue_id":"homemaker-py-ccw","depends_on_id":"homemaker-py-uxz","type":"blocks","created_at":"2026-06-12T00:39:44Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"homemaker-py-ccw","depends_on_id":"homemaker-py-way","type":"blocks","created_at":"2026-06-12T00:39:45Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":2,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-way","title":"Benchmark: memetic loop vs urb-evolve at equal oracle-call budget (Phase 2 gate)","description":"DESIGN.md §7 Phase 2 gate. Compare against urb-evolve from the same seeds/programmes at equal oracle-evaluation budget — NOT generations (urb-evolve has diversity injection/culling baked in, so generations are not comparable). Go/no-go: memetic loop must beat equal-budget urb-evolve. Scaling up waits for native fitness.","acceptance_criteria":"Best-fitness and failure-count comparison at \u003e=2 budgets, \u003e=3 seeds; go/no-go decision recorded in DESIGN.md","status":"open","priority":2,"issue_type":"task","owner":"bruno@postle.net","created_at":"2026-06-11T23:37:28Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:37:28Z","dependencies":[{"issue_id":"homemaker-py-way","depends_on_id":"homemaker-py-b39","type":"blocks","created_at":"2026-06-12T00:39:39Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"homemaker-py-way","depends_on_id":"homemaker-py-gp2","type":"blocks","created_at":"2026-06-12T08:27:45Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":2,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-b39","title":"Memetic search driver, small-scale (budgets in oracle evaluations)","description":"DESIGN.md §5, §7 Phase 2, §4.6 arithmetic. Memetic EA/SA over topology genomes wrapping the geometry inner loop (warm-started per §5.6); score = best full fitness over the inner loop. Explicitly small-scale on the batched oracle: tens of topologies, budget accounted in oracle evaluations, not generations. Population evaluation batched into single oracle calls.","acceptance_criteria":"End-to-end run on programme-house completes within a stated oracle-call budget and logs evaluations; produces valid .dom output","status":"open","priority":2,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:37:27Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:37:27Z","dependencies":[{"issue_id":"homemaker-py-b39","depends_on_id":"homemaker-py-1p0","type":"blocks","created_at":"2026-06-12T00:39:37Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"homemaker-py-b39","depends_on_id":"homemaker-py-nyb","type":"blocks","created_at":"2026-06-12T00:39:38Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":2,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-nyb","title":"High-locality topology operators (mutation + subtree crossover)","description":"DESIGN.md §5, §7 Phase 2, §8.4. Mutation moves: divide/undivide leaf, swap children, rotate cut, retype leaf, per-floor delta edits, storey add/delete (cf. Urb Mutate.pm — but geometry sliding belongs to the inner loop, not the operator set). Crossover: area-matched subtree exchange (a subtree = a contiguous region, so crossover is meaningful — Crossover.pm). Operators must be high-locality: small genome change =\u003e small phenotype change, so warm-started inner loops stay cheap.","acceptance_criteria":"Each operator produces valid genomes (oracle scores them without error); locality measured (mean fitness/geometry perturbation per operator)","status":"open","priority":2,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:37:27Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:37:27Z","dependencies":[{"issue_id":"homemaker-py-nyb","depends_on_id":"homemaker-py-k2g","type":"blocks","created_at":"2026-06-12T00:39:36Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-k2g","title":"Topology genome: base-floor tree + per-floor deltas + type assignment","description":"DESIGN.md §5.2, §7 Phase 2. Genome = base-floor slicing topology (primary) + per-leaf type assignment + per-floor divide/undivide deltas (Below-inheritance as regulariser; cut owned by lowest storey where its path is divided — §10). Must round-trip to/from dom.py Node trees so the oracle and inner loop consume it directly. Includes storey count and per-floor type overrides.","acceptance_criteria":"Genome \u003c-\u003e .dom round-trip on all 35 corpus files preserves fitness; multi-storey wall stacking preserved","status":"open","priority":2,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:37:26Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:37:26Z","dependency_count":0,"dependent_count":1,"comment_count":0}
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{"id":"homemaker-py-d0s","title":"Experiment: inner-loop optimiser bake-off at equal oracle budgets","description":"DESIGN.md §7 Phase 1, §8.3. DOF is only ~rooms-1 (6–7 on corpus). Compare Nelder-Mead vs CMA-ES vs batched multi-start pattern search at equal oracle-call budgets, measuring fitness gained per oracle call and wall-clock (batch-friendliness matters — §4.6). Measure, don't commit blind.","acceptance_criteria":"Table of fitness-per-budget across \u003e=3 candidates; one optimiser chosen and recorded in DESIGN.md","status":"open","priority":2,"issue_type":"task","owner":"bruno@postle.net","created_at":"2026-06-11T23:36:59Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:36:59Z","dependencies":[{"issue_id":"homemaker-py-d0s","depends_on_id":"homemaker-py-1p0","type":"blocks","created_at":"2026-06-12T00:39:35Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":0,"comment_count":0}
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{"id":"homemaker-py-can","title":"Programme width defaults: t3 contradiction (impossible width_inside default)","description":"DESIGN.md §8.2, confirmed in source. t3 (3 m2 WC) has no width spec so inherits width_inside [4.0, 1.0] (Fitness/Base.pm:60) — geometrically impossible; designs 'pass' only by failing size instead. Fix AFTER faithful-port validation (port-faithfully-first policy, §8.1): a sane width default scaled to area (e.g. sqrt(area/proportion)) or per-room widths in patterns.config. Applies to native fitness; optionally upstream to Urb.","acceptance_criteria":"No programme space has a default width incompatible with its target area; corpus re-scored and effect documented","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-06-11T23:39:01Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:39:01Z","dependencies":[{"issue_id":"homemaker-py-can","depends_on_id":"homemaker-py-uxz","type":"blocks","created_at":"2026-06-12T00:39:47Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":0,"comment_count":0}
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{"id":"homemaker-py-yg5","title":"Penalty reshaping: replace 0.5^n while preserving inner-loop protection","description":"DESIGN.md §4.7, §5.4, §7 Phase 4, §8.5. The 0.5^n cliff gives the outer search no gradient and rewards flag-count over geometry, but it also PROTECTS the inner loop from trading into new failures (§4.5). One fitness shape cannot naively be both soft outside and cliff-protected inside. Candidates: cliff-inside-inner-loop only, lexicographic (failure count first, score second), additive/soft, multi-objective Pareto. Must preserve the missing-space failure hierarchy (worse to drop a room than to have a poor one). Measure landscape + search outcomes; this helps Urb today too.","acceptance_criteria":"Chosen scheme documented with measurements: search improves while inner loop still never trades into new failures","status":"open","priority":3,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:39:00Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:39:00Z","dependencies":[{"issue_id":"homemaker-py-yg5","depends_on_id":"homemaker-py-uxz","type":"blocks","created_at":"2026-06-12T00:39:46Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":0,"comment_count":0}
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{"id":"homemaker-py-9gp","title":"Canonical slicing encoding (normalized Polish expression) + shape feasibility","description":"DESIGN.md §5.5, §7 Phase 5. Representation upgrade once core lands: normalized Polish expression / skewed slicing tree (Wong–Liu) for redundancy-free, high-locality topology moves (M1/M2/M3); bottom-up shape-feasibility checks to prune infeasible topologies before the inner loop. Goal: scale to larger programmes. Excluded representations stay excluded (§2): no sequence-pair/B*-tree (non-slicing).","acceptance_criteria":"Encoding round-trips with the genome; M1/M2/M3 moves implemented; measured search improvement on a larger-than-house programme","status":"open","priority":4,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:39:02Z","created_by":"Bruno Postle","updated_at":"2026-06-11T23:39:02Z","dependencies":[{"issue_id":"homemaker-py-9gp","depends_on_id":"homemaker-py-ccw","type":"blocks","created_at":"2026-06-12T00:39:48Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":0,"comment_count":0}
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{"id":"homemaker-py-2g5","title":"Rebuild occlusion/daylight/sun subsystem in Python (post-Phase-5, after optimisation fully native)","description":"DESIGN.md §6 port scope — a whole subsystem, not a term. quality_daylight (Leaf.pm:281-296) needs Urb::Misc::Sun + Urb::Field::Occlusion (+CIESky); quality_uncrinkliness also takes the occlusion object. Indoor spaces return 1 for daylight; cost is outdoor spaces + crinkliness. Port Sun_horizontal (262980-minute normalisation) and the occlusion wall set from Dom-\u003eWalls.","acceptance_criteria":"Daylight and crinkliness factors match Perl (float tolerance) across the corpus, including multi-storey cases","notes":"Re-scoped 2026-06-12: occlusion disabled in the Urb oracle instead of ported (see homemaker-py-gp2). Native fitness ships with simple crinkliness (illumination factor = 1, in homemaker-py-gnw). This issue is now the eventual Python occlusion rebuild, only after optimisation works entirely in Python. Restores outdoor-daylight and shaded-wall selection pressure.","status":"open","priority":4,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-06-11T23:38:25Z","created_by":"Bruno Postle","updated_at":"2026-06-12T07:27:48Z","dependency_count":0,"dependent_count":0,"comment_count":0}
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{"_type":"memory","key":"strategy-decision-2026-06-12-bruno-occlusion-daylight","value":"Strategy decision 2026-06-12 (Bruno): occlusion/daylight is ORTHOGONAL to building a scalable optimiser. Disable it in Urb (env flag, homemaker-py-gp2) rather than port it; native fitness uses simple crinkliness (illumination factor = 1); rebuild occlusion in Python only after optimisation is fully native (homemaker-py-2g5, now P4). Consequence: all scores change when the flag flips — re-baseline corpus/.score, DESIGN \\$4.5 gains, gate bars at one clean boundary AFTER homemaker-py-1p0 closes; Phase-2 urb-evolve benchmark must run with the same flag."}
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{"_type":"memory","key":"user-preference-bruno-this-is-a-fedora-system","value":"User preference (Bruno): this is a Fedora system — NEVER install Python packages via pip without asking first; always ask whether to install the rpm via dnf (e.g. python3-cma) before considering pip. Applies to any dependency additions."}
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{"_type":"memory","key":"urb-oracle-nondeterminism-urb-fitness-pl-output-varies","value":"Urb oracle nondeterminism: urb-fitness.pl output varies run-to-run from Perl hash-order randomisation — .fails line ORDER shuffles (compare sorted, use oracle.Score.fail_lines) and the score float can flip by ~1 ULP (compare with math.isclose rel_tol=1e-12, never ==). Not a batching artifact; affects single runs too. Matters for the Phase 3 native-fitness parity gate (homemaker-py-uxz)."}
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