---
id: TASK-147
title: Delegation-weighted voting mode for rVote
status: To Do
assignee: []
created_date: '2026-04-16 18:56'
labels:
  - rvote
  - governance
  - power-indices
dependencies:
  - TASK-144
references:
  - modules/rvote/mod.ts
  - src/encryptid/power-indices.ts
priority: high
---

## Description

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Optional voting mode where conviction vote weight is multiplied by the voter's Shapley-Shubik index.

## What
Currently rVote uses credit-based quadratic voting (1 vote = 1 credit, 2 = 4 credits). Add an optional space-level toggle: "delegation-weighted voting" where each vote's effective weight = `creditWeight × shapleyShubikIndex`. This lets delegated authority flow into proposal ranking.

## Primitive: Power Weight Multiplier
- New field in space voting config: `weightMode: 'credits-only' | 'delegation-weighted'`
- When `delegation-weighted`: fetch voter's power index at vote time
- `effectiveWeight = creditWeight × (1 + shapleyShubik × delegationMultiplier)`
- Default `delegationMultiplier = 2.0` (configurable per space)
- Fallback: if no power index data, effectiveWeight = creditWeight (graceful degradation)

## Implementation
- `modules/rvote/mod.ts`: In `POST /api/proposals/:id/vote` handler, check space config
- If delegation-weighted: fetch from EncryptID `/api/power-indices/:did?space={space}`
- Multiply vote weight before storing in Automerge doc
- Display in UI: "Your vote: 3 credits × 1.4x delegation = 4.2 effective weight"
- ~50 lines server, ~20 lines UI display
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## Acceptance Criteria
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- [ ] #1 Space config toggle: credits-only vs delegation-weighted
- [ ] #2 Vote weight multiplied by Shapley-Shubik when delegation-weighted
- [ ] #3 Multiplier configurable per space (default 2.0)
- [ ] #4 UI shows breakdown: credits × delegation multiplier = effective
- [ ] #5 Graceful fallback to credits-only when no power data
<!-- AC:END -->