a-plot-of-plants/AGENTS.md

Yard Map Agent Notes

This file is a fast handoff for future coding agents working in this repo.

What this project is

Static client-side yard mapping app.

• Rendering: Leaflet.
• Basemap: public OSM raster tiles.
• Yard data: authored in JavaScript modules, converted to GeoJSON in the browser.
• Runtime: plain ES modules, no bundler.

Current architecture

Core files:

• src/lib/geometry.js: absolute points, local offsets, feet conversion, per-anchor rotation support.
• src/lib/feature-types.js: feature-kind style defaults.
• src/lib/yard-features.js: typed feature classes, stable ids, groups, parent-child relationships, GeoJSON export.
• src/data/*.js: yard content split by domain.
• src/main.js: Leaflet map, legend, popup rendering.

Top-level exported data shape from src/data/yard.js:

• type: "FeatureCollection"
• features: [...]
• groups: [...]

Each feature currently exports:

• properties.id
• properties.kind
• properties.label
• properties.name
• properties.parentId
• properties.groupIds
• properties.details
• properties.style

Important decisions already made

1. Data is JS-authored on purpose. This allows mixing exact imported geometry with expressions like offset(anchor, east(ft(10))).

2. Styling belongs to feature types, not individual features by default. If you need a new semantic type, prefer adding a new typed feature or feature-type definition rather than hand-styling scattered instances.

3. Local rotation is per anchor. offset(...) reads assumedNorthClockwiseDegrees from the anchor point used as the origin. Do not reintroduce a global lot rotation unless there is a strong reason.

4. Grouping and parent-child metadata are already part of the data model. Future visibility controls should consume groupIds and parentId rather than inventing a second relationship system.

5. The GPKG was only a seed source. The app does not depend on GIS tooling at runtime.

Known data caveat

buildings.gpkg has a CRS issue in lot_boundary.

• The usable lot polygon was fid = 2.
• It had to be treated as EPSG:26914 during extraction.
• Do not trust that layer's metadata blindly if you re-import from the GPKG.

What is already modeled

• Porch and deck are children of the main house and also part of the House Parts group.
• Medora junipers are part of the Juniper Trees group.
• A test tree exists that is offset from the top-left lot corner using per-anchor rotation.

Likely next steps

1. Add show/hide controls driven by yardGeoJSON.groups and possibly parentId.
2. Decide whether toggles should be by feature kind, by group, by parent object, or a combination.
3. If closer basemap zoom fidelity matters, migrate from raster OSM tiles to a vector tile or self-hosted basemap.

Useful validation commands

Validate data export:

node -e "import('./src/data/yard.js').then(({ yardGeoJSON }) => console.log(yardGeoJSON.features.length))"

Run local server:

python3 -m http.server 4173

Editing guidance

• Preserve the typed-feature pattern.
• Prefer adding semantic types or groups over ad hoc properties when possible.
• Keep authored geometry readable; avoid generated noise unless the user explicitly wants bulk-import output.
• If adding new anchors, attach rotation metadata to the anchor itself.