# Agent instructions

You are advising on UX and product design for **MONAD-ASYNC: Asynchronous Execution**.
This document is the authoritative designer guide from EIPs for Designers.

- Treat **MUST NOT** items as hard constraints unless the user explicitly overrides.
- Use the **Vocabulary** section for UI copy; do not use avoided terms.
- Cite the canonical source URL when giving recommendations.
- Use the official specification only for protocol implementation detail, not as primary UX guidance.

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# MONAD-ASYNC: Asynchronous Execution

Source: https://www.eipsfordesigners.com/standards/MONAD-ASYNC
Agent brief: https://www.eipsfordesigners.com/standards/MONAD-ASYNC/agent.md
Machine-readable JSON: https://www.eipsfordesigners.com/api/standards/MONAD-ASYNC
Last reviewed: 2026-04-05
Last updated: 2026-04-05

| Field | Value |
| --- | --- |
| Status | Active |
| Chain | monad |
| Category | Infrastructure |
| Journey stages | Status & Confirmation |
| Detailed guide | Yes |

## UX Impact

Consensus finalizes before execution completes — transactions are 'in' but state updates follow. Design implications: show transaction stages (Proposed → Voted → Finalized → Verified), display 'Awaiting execution' status after inclusion, indicate state root finality separately from transaction finality. Design decisions: whether to show Finalized (800ms, safe for most) or wait for Verified (1.6s, guaranteed state) for confirmations; how to explain the 3-block execution lag simply.

## Summary

Monad uses asynchronous execution — transactions are executed optimistically before consensus is complete, then validated. This is why Monad feels instant. For UX, this means showing "Confirming..." briefly (~400ms), then "Confirmed" (~800ms). The two-phase feedback model replaces Ethereum's long pending state.

## For Designers

- You can design UI that delivers "Confirming..." → "Confirmed" in under a second.
- You can design UI that delivers two clear phases: executing → confirming → done.
- You can design UI that delivers fast feedback, no confusion about status.

## Applicability

### When to Use

- Your product addresses: long wait times feel like something is broken.
- Your product addresses: no intermediate feedback during execution.
- The flow should deliver: "Confirming..." → "Confirmed" in under a second.
- You are designing a two-phase confirmation experience with visible states and recovery paths.

### When to Avoid

- Match animation speed to actual ~1s confirmation.
- Design for instant, not for waiting.
- Subtle phase labels or just smooth fast transition.
- Protocol plumbing is invisible and never surfaces in user-facing UI.

## Problems It Solves

### Long wait times feel like something is broken

Impact: critical

Old way: 15 seconds of "Pending..." — is it stuck?

New way: "Confirming..." → "Confirmed" in under a second

### No intermediate feedback during execution

Impact: high

Old way: Spinner spins, user waits, no idea what's happening

New way: Two clear phases: executing → confirming → done

### Users retry transactions thinking they failed

Impact: high

Old way: Slow = must be broken, click again

New way: Fast feedback, no confusion about status

## MUST NOT (Anti-Patterns)

- **Long loading animations on Monad** (high)
  - Why: Animation takes longer than actual confirmation
  - Instead: Match animation speed to actual ~1s confirmation

- **Using Ethereum-speed expectations** (high)
  - Why: Designing for 15s when reality is <1s
  - Instead: Design for instant, not for waiting

- **Not showing phase distinction** (medium)
  - Why: Users don't understand why there are two steps
  - Instead: Subtle phase labels or just smooth fast transition

## UX Patterns

### Two-Phase Confirmation

Show execution then confirmation phases

User flow:

- User submits transaction
- Phase 1: Execution (optimistic)
- Phase 2: Consensus confirmation
- Phase 3: Final confirmation
- Show completion time

Mockup registry key: `generic/instant-confirm` (React UI on the live standard page).

### Inline Quick Confirmation

Minimal inline status for fast transactions

User flow:

- User clicks confirm
- Button shows "Sending..."
- Updates to "Confirming..."
- Shows "Sent! (0.8s)"
- No page change needed

Mockup registry key: `generic/instant-confirm` (React UI on the live standard page).

## UI Components

### AsyncStatusIndicator

Shows current phase of async execution
States: submitting, executing, confirming, confirmed, failed
Props: currentPhase, estimatedTime

### PhaseProgressBar

Visual progress through execution phases
States: phase-1, phase-2, complete
Props: phase, progress

### FastConfirmAnimation

Quick animation for sub-second confirmations
States: idle, animating, complete
Props: duration, onComplete

## On Monad

### Execution Model

Ethereum: Sequential: execute after consensus

Monad: Async: execute optimistically, confirm after

Design implication: Show two quick phases instead of one long wait

### Total Time

Ethereum: 12-15 seconds for block + execution

Monad: ~800ms total

Design implication: Feedback should be nearly instant

### Optimistic Display

Ethereum: Wait for block before showing result

Monad: Can show likely result after execution phase

Design implication: Optimistic UI updates are safe

## Key Takeaways

- Monad = async execution (execute then confirm)
- Total time: ~800ms (execution + confirmation)
- Show quick two-phase feedback, not long spinner
- Design for instant, not for waiting
- Animation should match actual speed

## Technical Notes

Monad executes transactions optimistically before consensus is finalized. Execution happens in parallel across transactions without conflicts. Consensus confirms the execution was valid. If conflicts detected, transactions re-execute. Result: apparent instant confirmation because execution begins immediately on submission. Finality in single slot.