Closes the second namespace sharing a first character with programme codes: the usage prefixes b/t/l/k, under which a room silently inherited another room's connectivity rules from its spelling. usage is a plain, MANDATORY attribute of the space definition -- not a lookup table. An interim design proposed a top-level usage_classes: table binding author-coined names to behaviour; withdrawn, because an indirect name->behaviour mapping living apart from the thing it describes is exactly the shape of the prefix rule §39 exists to remove, it would be the only such table in a schema where every other space property is a plain attribute, and the need it served was already met -- "building specific" is about what a room is CALLED, and name: is already free text. Rule that settles it: a usage value exists iff the engine treats it differently somewhere. Config selects among behaviours; it cannot invent them. - programme.USAGES (living/kitchen/bedroom/toilet/utility/none) plus the behaviour groupings PRIVATE_USAGES / PRIVATE_STRIPS / TOILET_STRIPS / SOCIABLE_USAGES. Missing or unknown usage is a load error naming the code, from BOTH parse paths. - Code-level, never leaf-level: usage_of(leaf.type) is looked up fresh, so a retype changes the class automatically. 51 sites assign leaf.type, and share/share_type plus the r5a resurrection are the precedent for why leaf-level attributes rot. - graph.has_circulation takes the usage map and trims on declared class; fitness.access and the public-access check likewise. fitness._t0 is DELETED -- no first-character type test remains anywhere in the codebase. - utility is distinct from bedroom (same access requirements today) because it is a different use and gives derive_interchange_classes an axis to relax on. - A toilet now keeps its edge to a terminal room -- the Brand adjacency, which the old b-before-t loop ordering severed. - All 107 corpus entries migrated by experiments/migrate_usage_key.py, comments and layout preserved. MEASURED -- the connectivity model was ~4x too permissive. `none` is not neutral: nothing is trimmed, so the graph may route THROUGH the room, and 34 of 52 codes had no class (Dental Surgery, Records Room, Utilities Closet all served as corridors). Edges trimmed, prefix-inferred vs declared, 3 seeds each: harbor-house 18 (9%) -> 79 (39%) inaccessible fails 0 -> 4 health-centre 12 (8%) -> 59 (40%) inaccessible fails 2 -> 3 maple-court 53 (17%) -> 123 (39%) inaccessible fails 1 -> 5 Re-baseline (seed 1, 20k, harbor): 58 fails (15h/43s) -> 61 (16h/45s), now reporting 1-inaccessible-usable-space x2 plus level 0 and level 1 not connected. The count rose because the objective got honest -- those failures were always true of the layout and the old model could not see them. Every harbor number before this was measured against a graph crediting routes through store cupboards. Sharpens §38.2: the objective pays x60-85 to delete circulation, and until now the deleted corridors were not missed because storage stood in for them. With that substitution gone, homemaker-py-2v1 is the remaining half -- and now measurable, because the fails it should prevent actually fire. 350 passed (+5 new), same 7 pre-existing fixture failures, lint unchanged. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MJ84Feep79Hhm3E4zZJmnB
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Agent Instructions
This project uses bd (beads) for issue tracking. Run bd prime for full workflow context.
Quick Reference
bd ready # Find available work
bd show <id> # View issue details
bd update <id> --claim # Claim work atomically
bd close <id> # Complete work
bd dolt push # Push beads data to remote
Non-Interactive Shell Commands
ALWAYS use non-interactive flags with file operations to avoid hanging on confirmation prompts.
Shell commands like cp, mv, and rm may be aliased to include -i (interactive) mode on some systems, causing the agent to hang indefinitely waiting for y/n input.
Use these forms instead:
# Force overwrite without prompting
cp -f source dest # NOT: cp source dest
mv -f source dest # NOT: mv source dest
rm -f file # NOT: rm file
# For recursive operations
rm -rf directory # NOT: rm -r directory
cp -rf source dest # NOT: cp -r source dest
Other commands that may prompt:
scp- use-o BatchMode=yesfor non-interactivessh- use-o BatchMode=yesto fail instead of promptingapt-get- use-yflagbrew- useHOMEBREW_NO_AUTO_UPDATE=1env var
Beads Issue Tracker
This project uses bd (beads) for issue tracking. Run bd prime to see full workflow context and commands.
Quick Reference
bd ready # Find available work
bd show <id> # View issue details
bd update <id> --claim # Claim work
bd close <id> # Complete work
Rules
- Use
bdfor ALL task tracking — do NOT use TodoWrite, TaskCreate, or markdown TODO lists - Run
bd primefor detailed command reference and session close protocol - Use
bd rememberfor persistent knowledge — do NOT use MEMORY.md files
Room-code namespaces (DESIGN.md §39.4/§39.6)
Leaf types share a first character across three namespaces:
C/O/S— generic structural types (circulation / outside / sahn), uppercase, reserved. A programme code spelled exactly one of these is rejected at load.- programme room codes — lowercase, may start with any letter. The generic
tests match
C/O/Sexactly, socr1is a room, not circulation. usage:— every space declares its access-requirement class (living/kitchen/bedroom/toilet/utility/none), mandatory, no fallback (DESIGN.md §39.7). A code's spelling decides nothing:name:is free text,usage:drives behaviour. There is no first-character type test left anywhere in the codebase.
When adding or editing a programme, run
python experiments/audit_programme_config.py — it reports reserved-name
collisions, the usage class each code picks up, and per-room-spec satisfiability.
Session Completion
When ending a work session, you MUST complete ALL steps below. Work is NOT complete until git push succeeds.
MANDATORY WORKFLOW:
- File issues for remaining work - Create issues for anything that needs follow-up
- Run quality gates (if code changed) - Tests, linters, builds
- Update issue status - Close finished work, update in-progress items
- PUSH TO REMOTE - This is MANDATORY:
git pull --rebase bd dolt push git push git status # MUST show "up to date with origin" - Clean up - Clear stashes, prune remote branches
- Verify - All changes committed AND pushed
- Hand off - Provide context for next session
CRITICAL RULES:
- Work is NOT complete until
git pushsucceeds - NEVER stop before pushing - that leaves work stranded locally
- NEVER say "ready to push when you are" - YOU must push
- If push fails, resolve and retry until it succeeds