Procedure for running an independent, automated evaluation loop against the EncDotNet.S100 Avalonia viewer using its CLI flags and embedded MCP server. Lets an agent launch the viewer headlessly, load datasets, drive viewport / palette / display-category / time-step / own-ship, capture screenshots, await render-idle, and read render stats — then iterate. USE FOR: visually verifying a rendering or portrayal change; designing or reproducing integration/regression scenarios; measuring load/render performance; capturing reference images; deriving test fixtures from real datasets; any "does it actually look/behave right in the viewer?" question — INCLUDING from renderer (Renderers.Mapsui / Renderers.Skia), Core pipeline, or Datasets.SXXX work, not only when editing the Viewer project. DO NOT USE FOR: pure library logic unit tests (write xunit directly), viewer XAML/localization conventions (see viewer.instructions.md), or the MCP tool catalogue reference (see docs/mcp-server.md).
Cross-cutting cartography and chart-rendering domain expertise for electronic navigational displays — the principles of how marine charts are composed, layered, generalized, coloured, projected, and made performant. Spec- and renderer-agnostic: it explains the *why/what* of good chart rendering and how those principles manifest in this codebase, then defers to the per-spec skills for product semantics and to the renderer READMEs for implementation. USE FOR: layer/draw-order and display-priority decisions; scale-dependent generalization, declutter, SCAMIN/scale-band culling; label/text placement and deconfliction; day/dusk/night palette and contrast design; CRS/projection choices and distortion/antimeridian/pole pitfalls; rendering-performance strategy (geometry simplification, path/snapshot caching, tiling, vertex-bound cost reasoning); reviewing a rendering change for cartographic correctness across products. DO NOT USE FOR: a specific product's encoding/attribute/portrayal rules (use the sXXX skill); Mapsui
Expert knowledge of IHO S-122 Marine Protected Areas Product Specification (Edition 2.0.0). Covers GML encoding (S-100 Part 10b) over the S-100 GML base, the S-122 application schema (marine protected areas, restricted areas, regulated areas, and associated text placement), and the XSLT-based portrayal pipeline. USE FOR: S-122 datasets, marine protected areas, restricted/regulated areas, GML parsing for S-122, XSLT portrayal of S-122, vector pipeline changes affecting S-122, S122DatasetReader / S-122 reader/source code, S-122 tests, edits to bundled `content/S122/**` assets. DO NOT USE FOR: S-127 marine resources and services (use s127-marine-services), S-124 nav warnings (use s124-nav-warnings), S-125 AtoN (use s125-aton), S-101 ENC (use s101-enc), generic GML / framework concerns (use s100-framework).
Expert knowledge of IHO S-104 Water Level Information for Surface Navigation Product Specification. Covers HDF5-encoded water-level time-step grids, WaterLevel feature, Group_NNN time-series groups, data coding formats (regular grid, ungeorectified grid, time series at fixed stations, etc.), trend/quality flags, and tide-station metadata. USE FOR: S-104 datasets, water level forecasts/observations, tide grids, S104DatasetReader, S104CoverageSource, S104PortrayalCatalogue, WaterLevelCoverage, WaterLevelValue, time-step iteration, adding S-104 features, S-104 tests. DO NOT USE FOR: S-102 bathymetry (use s102-bathymetry), S-111 currents (use s111-surface-currents), generic HDF5 (use s100-framework).
Expert knowledge of IHO S-102 Bathymetric Surface Product Specification (HDF5-encoded depth/uncertainty grids). Covers BathymetryCoverage groups, Group_F feature codes, depth/uncertainty dataset shapes, NODATA fill value handling (1,000,000f), tiling, georeferencing attributes, CRS conventions (often UTM), and the depth-shading portrayal palette. USE FOR: S-102 datasets, bathymetric grids, depth surfaces, uncertainty grids, HDF5 bathymetry, BathymetryCoverage, CoverageCell layout, depth shading, S102DatasetReader, S102CoverageSource, S102PortrayalCatalogue, PC-driven Lua portrayal, adding S-102 features, reviewing for S-102 spec compliance, RenderS102 tool changes. DO NOT USE FOR: S-104 water levels (use s104-water-level), S-111 currents (use s111-surface-currents), generic HDF5 access (use s100-framework).
Expert knowledge of IALA S-201 Aids to Navigation Information Product Specification (Edition 2.0.0, May 2025; aligned with S-100 Ed 5.2.0). Covers GML encoding (S-100 Part 10b) on the S-100 GML 5.0 profile, the S-201 application schema (62 feature types — buoys, beacons, lights, AIS aids, structures, equipment, aggregations), the 4 information types (AtoNFixingMethod, AtonStatusInformation, PositioningInformation, SpatialQuality), xlink-based information bindings, the equipment-on-structure `parent`/`child` xlink relationship, and the XSLT-based portrayal pipeline (`main_PaperChart.xsl`). USE FOR: S-201 datasets, AtoN-authority data exchange, GML parsing for S-201, XSLT portrayal of S-201, vector pipeline changes affecting S-201, S-201 reader/source code, S-201 tests. DO NOT USE FOR: ECDIS-facing AtoN portrayal (use s125-aton — the ECDIS-facing AtoN spec is **S-125, not S-201**), S-101 ENC AtoN feature classes (use s101-enc), S-124 navigational warnings (use s124-nav-warnings), generic GML (use s100-framework
Expert knowledge of IHO S-131 Marine Harbour Infrastructure Product Specification (FC Edition 1.0.0, PC Edition 2.0.0). Covers GML encoding (S-100 Part 10b) in the application namespace `http://www.iho.int/S131/1.0` over the S-100 GML 5.0 base, the S-131 feature catalogue (berths, bollards, mooring buoys, dolphins, locks, dry docks, terminals, anchorage areas, harbour basins, authorities, etc.), and **Lua-based portrayal** (S-100 Part 9A) — making S-131 the first GML+Lua hybrid in this codebase. USE FOR: S-131 datasets, marine harbour infrastructure features, berths, bollards, mooring buoys, GML parsing for S-131, Lua portrayal of S-131, GML-to-Lua data provider bridge, vector pipeline changes affecting S-131, S-131 reader/source code, S-131 tests, edits to bundled `content/S131/**` assets. DO NOT USE FOR: S-101 ENC ISO 8211 features (use s101-enc), S-127 marine services (use s127-marine-services), S-124 nav warnings (use s124-nav-warnings), generic GML / framework concerns (use s100-framework).
Expert knowledge of IHO S-128 Catalogue of Nautical Products Product Specification (Edition 2.0.0). Covers GML encoding (S-100 Part 10b) in the application namespace `http://www.iho.int/S128/2.0` over the S-100 GML 5.0 base, the S-128 feature catalogue (ElectronicProduct, PhysicalProduct, S100Service, plus producer / distributor / contact metadata features), and XSLT-based portrayal. USE FOR: S-128 datasets, catalogues of nautical products, electronic products, physical products, S-100 services, GML parsing for S-128, XSLT portrayal of S-128, vector pipeline changes affecting S-128, S-128 reader/source code, S-128 tests, edits to bundled `content/S128/**` assets. DO NOT USE FOR: S-127 marine resources and services (use s127-marine-services), S-122 marine protected areas (use s122-marine-protected-areas), S-124 nav warnings (use s124-nav-warnings), S-101 ENC (use s101-enc), generic GML / framework concerns (use s100-framework).