archy/.claude/skills/polish-errors/SKILL.md

Skill: Polish Error Handling

Fix silent error handling patterns across the entire codebase. Every async operation must have visible, actionable error feedback for the user.

What to Fix

Frontend (neode-ui/src/)

1. Silent catch blocks: Find and replace all .catch(() => {}) patterns

   • Search: grep -rn "catch.*=>.*{}" --include="*.vue" --include="*.ts" src/
   • Replace with: proper error logging + user-visible feedback (toast, inline error, or modal)
   • Pattern:

     .catch((err) => {
       console.error('[ComponentName] operation failed:', err)
       errorMessage.value = formatError(err)
     })
     

2. Unhandled router.push: Find router.push(...).catch(() => {})

   • Replace with: router.push(...).catch(console.error) minimum
   • Or handle NavigationDuplicated gracefully

3. Silent try/catch: Find try { ... } catch { /* empty */ }

   • Every catch block must either: log the error, show user feedback, or explicitly comment why it's safe to ignore

4. Missing error states: For each view, verify:

   • ref<string | null> error variable exists
   • Error is displayed in template (inline message, not just console)
   • Error clears on retry or navigation

Backend (core/)

5. Silent error swallowing: Find unwrap_or_default() on serialization

   • Replace with proper error propagation or logging
   • Pattern: .map_err(|e| anyhow::anyhow!("Serialization failed: {}", e))?

6. Error response consistency: All RPC errors should use:

   • Consistent error codes (not random negative numbers)
   • Human-readable messages
   • Consistent JSON structure

Verification

After fixes, run:

# Zero silent catches
grep -rn "catch.*=>.*{}\|catch\s*{" neode-ui/src/ --include="*.vue" --include="*.ts" | grep -v node_modules | grep -v "console\|error\|log\|warn"

# Zero empty catch blocks
grep -rn "catch.*{$" neode-ui/src/ --include="*.vue" --include="*.ts" -A1 | grep -P "^\d+-\s*\}"

Both should return zero results.

Error Display Pattern

Use this consistent pattern for user-facing errors:

const errorMessage = ref<string | null>(null)

async function doAction() {
  errorMessage.value = null
  try {
    await rpcClient.someCall()
  } catch (err) {
    errorMessage.value = err instanceof Error ? err.message : 'Operation failed'
  }
}

Template:

<p v-if="errorMessage" class="text-red-400 text-sm mt-2">{{ errorMessage }}</p>

Deploy After Fixes

Always deploy and verify on live server after making changes:

./scripts/deploy-to-target.sh --live