Added README.md

README.md

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+# Adaptive Damage Resistance
+Adaptive Damage Resistance is a small module for Foundry VTT and the Dungeons & Dragons 5e system.
+
+It adds features that allow creatures to adapt to the damage they suffer. After a creature is hit and actually takes damage, it can gain a temporary resistance or immunity against that damage type. When it is later damaged by another matching damage type, the previous adaptation is replaced.
+
+<video src="adaptive-resistances.webm" controls width="720"></video>
+
+## Inhaltsverzeichnis
+
+- [What the module does](#what-the-module-does)
+- [Included feature groups](#included-feature-groups)
+- [How to use](#how-to-use)
+- [Important behavior](#important-behavior)
+- [Examples](#examples)
+- [Installation](#installation)
+- [Compatibility](#compatibility)
+- [Repository](#repository)
+
+## What the module does
+The module adds a compendium with ready-to-use features. You can drag these features onto any actor that should gain adaptive protection.
+
+There are two kinds of adaptive protection:
+
+- **Adaptive Resistance**
+- **Adaptive Immunity**
+
+Each kind is available for different groups of damage types.
+
+## Included feature groups
+
+### Elemental
+The creature adapts to elemental damage types such as fire, cold, acid, lightning, and thunder.
+
+### Magical
+The creature adapts to more supernatural damage types such as force, necrotic, psychic, and radiant damage.
+
+### Profane
+The creature adapts to physical weapon damage types such as bludgeoning, piercing, and slashing.
+This does not check whether a weapon is magical or non-magical. It only reacts to the damage type itself.
+
+### Single damage types
+The module also includes one feature for each individual damage type. These can be used when a creature should only adapt to one specific kind of damage.
+
+## How to use
+1. Enable the module in your world.
+2. Open the compendium **Adaptive Damage Resistance Features**.
+3. Drag one of the adaptive features onto an actor.
+4. Use the normal dnd5e damage workflow during combat.
+
+When the actor takes valid damage, the matching resistance or immunity is added automatically.
+
+## Important behavior
+The adaptation only happens when damage is actually dealt.
+
+It does not trigger if:
+
+- no damage is applied,
+- the damage is reduced to 0,
+- the creature was already resistant or immune to that damage type,
+- the damage type does not match the feature on the actor.
+
+The new resistance or immunity is applied after the triggering hit. It does not protect against the same hit that caused it.
+
+## Examples
+A creature has **Adaptive Resistance: Elemental**.
+
+It is hit by fire damage and takes damage.  
+It gains resistance to fire damage.
+
+Later, it is hit by cold damage and takes damage.  
+The fire resistance is replaced with cold resistance.
+
+A creature has **Adaptive Immunity: Fire**.
+
+It is hit by fire damage and takes damage.  
+It gains immunity to fire damage.
+
+If the same creature is later hit by cold damage, nothing changes because the feature only reacts to fire damage.
+
+## Installation
+Use the manifest URL from the latest release:
+
+```txt
+https://github.com/fzumpe/foundry-dnd5e-adaptive-resistances/releases/latest/download/module.json
+```
+Or download the ZIP file from the release page and install it manually into your Foundry VTT modules folder.
+
+## Compatibility
+This module is intended for:
+
+Foundry VTT 14
+dnd5e 5.3.3
+
+## Repository
+https://github.com/fzumpe/foundry-dnd5e-adaptive-resistances