D20 Players

Generating Ability Scores

Offer three methods to generate the six ability scores.

Standard Array

Use these six scores, assigning each to one ability: 15, 14, 13, 12, 10, 8

Random Generation

For each of the six abilities, roll 4d6 and sum the highest three dice:

bash "${CLAUDE_PLUGIN_ROOT}/../corvran/skills/dice-roller/scripts/roll.sh" "4d6"

Parse the JSON output, discard the lowest roll, and sum the remaining three. Repeat six times.

Point Buy

Start with 27 points. Each ability starts at 8 (free). Costs to increase:

Calculating Derived Statistics

After assigning ability scores, calculate these values:

Ability Modifier

Modifier = (Score - 10) / 2, rounded down

Proficiency Bonus by Level

Hit Points at Level 1

Armor Class (AC)

Without armor: 10 + DEX modifier

With armor, use the armor's AC formula from the equipment tables.

Initiative

Initiative = DEX modifier

Saving Throws

Each class grants proficiency in two saving throws. For proficient saves:

Save Bonus = Ability Modifier + Proficiency Bonus

Skills

For proficient skills:

Skill Bonus = Ability Modifier + Proficiency Bonus

Passive Perception

Passive Perception = 10 + Wisdom (Perception) modifier

Recording the Character

Write character data to players/{character-slug}/sheet.md using the D20 template:

references/sheet-template.md

For a completed example, see:

references/sheet-example.md

D20 Sheet Sections

The sheet.md file must include:

1. Character Identity - Name, class, level, species, background, alignment
2. Ability Scores - All six scores with modifiers
3. Combat Stats - AC, HP (current/max), Hit Dice, Initiative, Speed
4. Proficiencies - Saving throws, skills, weapons, armor, tools, languages
5. Features & Traits - Class features, species traits, background feat
6. Equipment - Weapons with attack/damage, armor, gear, currency
7. Spellcasting (if applicable) - Ability, DC, attack bonus, slots, spells known

Level Advancement

When a character gains enough XP to level up:

Experience Thresholds

Level Up Steps

1. Increase Hit Points - Roll Hit Die + CON modifier (or use fixed value):

Roll HP:

bash "${CLAUDE_PLUGIN_ROOT}/../corvran/skills/dice-roller/scripts/roll.sh" "1d10"

Fixed HP values per level:

2. Gain Hit Die - Add one Hit Die to your pool
3. Check Proficiency Bonus - Increases at levels 5, 9, 13, 17
4. Record New Features - Add class features for the new level
5. Choose Subclass (Level 3) - Record subclass features
6. Ability Score Improvement (Levels 4, 8, 12, 16, 19) - Increase one score by 2 or two scores by 1, or choose a feat

Multiclassing

To take a level in a new class:

1. Check Prerequisites - Must have 13+ in primary abilities of both current and new class
2. Gain Limited Proficiencies - Only some proficiencies from the new class
3. Calculate Spellcasting - Combine levels per multiclass spellcaster rules

Rolling During Character Creation

Use the dice-roller skill for all randomization:

Ability Score (4d6 drop lowest):

bash "${CLAUDE_PLUGIN_ROOT}/../corvran/skills/dice-roller/scripts/roll.sh" "4d6"

Starting Gold (if not using equipment packs):

bash "${CLAUDE_PLUGIN_ROOT}/../corvran/skills/dice-roller/scripts/roll.sh" "5d4"

Trinket Roll:

bash "${CLAUDE_PLUGIN_ROOT}/../corvran/skills/dice-roller/scripts/roll.sh" "1d100"

Fallback Without Dice Roller

If the corvran dice-roller is unavailable, describe the required roll and ask the player for the result:

"Roll 4d6 and tell me the results. We'll drop the lowest die and sum the rest for your ability score."

References

Detailed rules in this skill's references/ directory:

• character-creation.md - Complete SRD 5.2 character creation rules
• sheet-template.md - Blank character sheet template
• story-template.md - Character story template (objectives, arcs, events)
• sheet-example.md - Completed Level 3 Fighter example