4931070602
Owner: "maybe plot_ratio is having unintended consequences, Alexander simply says that all levels should have accessible outside space, he doesn't say how much." Both halves are right, and the codebase had the two rules the wrong way round. ratio_outside is a gaussian on the outdoor FRACTION, applied as a whole-building multiplier, and its declared targets have no stated basis and contradict each other: health-centre targets 0.06 and sits at 0.096-0.129, so it is penalised x0.39-x0.77 for having too MUCH; programme-house targets 0.30 and sits at 0.098-0.293, penalised x0.40-x0.999 for having too LITTLE. Penalties as large as the ratio_circulation ones 39.24 removed, pulling two programmes in opposite directions on the same quantity. force_roof_garden already implements the rule Alexander actually states -- per level, no outdoor space at all is a hard fail, no quantity attached. It has existed all along and was switched OFF in every corpus config. Near-miss worth recording: measuring first, I found zero "no outside space" fails across the twelve baseline runs and briefly read that as the requirement being met everywhere. It meant the check never ran. Same shape as 39.20's parity tests -- no failures from a test that is not executing looks exactly like no failures from a test that passes, and the tell was again the config, not the code. Enabled, it bites on 4 of 25 baseline levels: maple s0 level 1, and programme-house level 0 in all three seeds. A house with no outdoor space on its own ground floor is a fair criticism of the layout, and exactly what a building-level fraction cannot catch, since 22% outdoor concentrated on one storey satisfies it perfectly. The upper side ratio_outside used to provide is covered in a better currency by the minimum-internal-area factor (internal area >= 1.2x the programme's declared room area), which is live -- binding on harbor s0 x0.920 and programme-house s0 x0.787. This is the one change in 39.22-39.25 whose risk is NOT measured: nothing here proves the outdoor fraction will not drift up once the search is free to raise it, and outdoor space is profitable (1.64 return against a room's 0.66). The re-baseline (bk9) is what shows it, and 39.25 asks for the fraction to be recorded there. 4 hard fails added, none removed. 426 passed. Refs homemaker-py-hxi. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MJ84Feep79Hhm3E4zZJmnB
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118 lines
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Text
---
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# Example patterns.config for programme-driven building evolution
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#
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# This file demonstrates how to define a building programme within
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# the standard patterns.config file format. The presence of the
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# 'spaces' key automatically triggers programme-driven mode.
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# Building programme: 2-bedroom house with ensuite
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spaces:
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b1:
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usage: bedroom
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name: Master Bedroom
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size:
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- 16.0
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- 4.0
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width:
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- 4.0
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- 1.0
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proportion:
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- 1.5
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- 0.5
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adjacency:
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- c
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t1:
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usage: toilet
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name: Ensuite Bathroom
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size:
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- 5.0
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- 1.5
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width:
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- 2.5
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- 0.5
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adjacency:
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- b1
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b2:
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usage: bedroom
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name: Second Bedroom
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size:
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- 12.0
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- 3.0
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width:
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- 3.5
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- 0.8
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adjacency:
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- c
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t2:
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usage: toilet
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name: Guest Bathroom
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size:
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- 4.0
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- 1.5
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adjacency:
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- c
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l1:
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usage: living
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name: Living/Dining/Kitchen
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size:
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- 35.0
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- 8.0
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width:
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- 4.5
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- 1.0
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proportion:
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- 2.0
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- 0.8
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level: 0
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adjacency:
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- c
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t3:
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usage: toilet
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name: Ground Floor WC
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size:
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- 3.0
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- 1.0
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adjacency:
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- c
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level: 0
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# Building constraints
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storey_minimum: 2
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storey_limit: 5
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# homemaker-py-hxi (DESIGN.md §39.25): ENABLED. Fails a level that has no
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# outdoor space at all -- Alexander's actual requirement, per level and with no
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# quantity attached. It had been off in every corpus config, so the only thing
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# expressing outdoor space was ratio_outside's arbitrary fraction.
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force_roof_garden: 1
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# Circulation ratio (penalise excessive corridors)
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# homemaker-py-hxi (DESIGN.md §39.24): disabled. The score is value/cost, a
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# ratio, so the per-m2 economics (circulation worth 50 against a build cost of
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# 200) is ALREADY a proportional pressure against circulation -- this said the
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# same thing a second time, and with a curve where twice the corridor is far
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# more than twice as bad. Its other side, "a building needs some circulation",
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# was worth at most 13% here and is enforced structurally anyway by the access
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# and connectivity checks. Set a [target, sigma] pair to re-enable.
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ratio_circulation:
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# Outside space ratio
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# homemaker-py-hxi (DESIGN.md §39.25): disabled. Alexander says every level
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# should have accessible outside space; he does not say how much. The
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# qualitative requirement is force_roof_garden below. Set a [target, sigma]
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# pair to re-enable this quantitative one.
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ratio_outside:
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# Staircase requirements
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staircase_min: 1
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staircase_max: 1
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# Other standard parameters can be included
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value_inside: 300.0
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value_circulation: 50.0
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value_outside: 100.0
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# homemaker-py-ecx (DESIGN.md §39.19): an upper-level terrace is worth what
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# outdoor space is worth (value_outside); it is the COST that differs by level
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# (outside 10.0 vs outside_supported 110.0), not the value. At 300.0 -- the
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# `value_inside` rate -- a terrace was worth more per square metre than a real
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# internal room, which the owner ruled out.
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value_supported: 100.0
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