Define alpha level, XP, and core stat allocation packet

[JOY]

Purpose

Create the alpha implementation packet for body level, XP curve, core stat allocation, derived stat recomputation, and inventory/equipment stat requirements.

Scope

• Chosen alpha body level cap and XP table.
• Stat points gained per body level.
• Rules for allocating points across the eight canonical core stats.
• Body-bound reset/carryover expectations after reinhabitation.
• Derived stat recomputation boundaries for health, energy, attack, defense, dodge, and body stability.
• Integration rules with inventory and equipment requirements.
• Server-authoritative mutation and validation rules.

References

• docs/design/14-character-stat-and-relationship-system.md
• docs/design/39-alpha-stats-and-skills-design.md
• docs/design/40-soul-skill-carryover-and-sync.md
• docs/design/45-inventory-and-equipment-system.md

Notes

Use Solo Leveling-style player-readable stat allocation as inspiration, but do not copy its exact economy blindly. SECOND SPAWN has body loss, inhabitable NPC Frames, and eight core stats, so the alpha curve must preserve body archetype identity and reinhabitation tension.

[JOY]

Completed by merged PR #276.

Canonical design packet:

• docs/design/57-alpha-level-core-stat-progression.md

Chops locked for alpha:

• current-body level cap 15
• 3 Body Points per current-body level
• fixed XP table for levels 1-15
• no automatic plus-one-to-all-stats growth
• Body Points are body-bound and lost with the retired/dead body unless a future carryover design says otherwise
• derived stats recompute through server-owned paths
• inventory and equipment requirements must use canonical stats and server validation

[JOY]

Design packet merged in PR #276.