# AGENTS.md

## Current status

Step 2 complete.

## Completed steps

Step 1 - Public API contract and pure core.
Step 2 - Thread-safe state, commands, overlays, and cache model.

## Current step

Step 3 - Widget shell, sizing system, and GUI-thread frame pump.

## Design decisions

- Package is managed with uv.
- Public import is `import dpg_map as dpgm`.
- Dear PyGui calls are GUI-thread-only.
- Runtime public calls enqueue commands or update logical state.
- Overlay updates must not reset center/zoom.
- The widget uses child_window + measured-size drawlist.
- Tiles use a memory cache and persistent disk cache.
- Tile providers are interchangeable.

## Known issues

None yet.

## Commands used

- Read `STEPS.md`, `FEATURES.md`, and `ARCHITECTURE.md`.
- Created initial package, examples, tests, and agent-log structure.
- Implemented public exports, exceptions, common types, tile provider registry, projection helpers, cache dataclasses, and GUI-dependent API stubs.
- Added Step 1 tests for imports, providers, projection, and cache dataclasses.
- Implemented global configuration, logical MapState, map registry, and current map context stack.
- Implemented DirtyFlags, MapCommand, CommandKind, and coalescing MapCommandQueue.
- Implemented logical marker, polyline, trajectory, and layer state models.
- Implemented public runtime overlay/view/layer/provider/cache/debug wrappers against logical state without Dear PyGui calls.
- Implemented memory cache metadata, disk cache path generation, metadata read/write, disk size scanning, and prune planning.
- Added Step 2 tests for command coalescing, overlay/view isolation, copied trajectory inputs, coordinate length validation, layer state, disk path generation, and prune ordering.
- Ran `uv run pytest`.
- Ran `uv run ruff check .`.
- Ran `uv run ruff format .`.
- Ran `uv run ruff format --check .`.
- Ran `uv run pyright`.

## Next action

Implement Step 3.