# ADR-001: Stack and storage

## Decision

Electron + React + TypeScript + Vite; SQLite with JSON documents for systems/characters; portable `app/shared` contract for future TTRPG Player + mobile.

## Rationale

Matches TTRPG Player packaging targets; offline-first; no Postgres.

# ADR-002: Formula DSL

## Decision

Custom minimal expression language (`floor`, `ceil`, `round`, `min`, `max`, `clamp`, arithmetic, `attr.*` / `skill.*` / `resource.*` / `derived.*`).

## Rationale

Same evaluator can be copied into the player; explicit rounding; no heavy CEL/JSONata dependency.

# ADR-003: Schema freeze via snapshotHash

## Decision

Player binds store `snapshotHash` (content-addressed) rather than inline full schema per character.

## Rationale

Implements freeze-on-bind without bloating `players.json`.

# ADR-004: Spells from dnd.su

## Decision

Provide an import pipeline for PHB-labelled spells from dnd.su at product owner request, with README/IP disclaimer. Prefer SRD stubs in default presets.

## Rationale

Owner requested PHB coverage; redistribution risk acknowledged.