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feat(utils): add logger #23

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maitamdev merged 1 commit into from
Mar 5, 2026
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feat(utils): add logger #23

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28 changes: 28 additions & 0 deletions src/utils/logger.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,28 @@
// Application logger utility
type LogLevel = 'debug' | 'info' | 'warn' | 'error';

const LOG_COLORS: Record<LogLevel, string> = {
debug: 'color: #9CA3AF',
info: 'color: #3B82F6',
warn: 'color: #F59E0B',
error: 'color: #EF4444',
};

class Logger {
private isDev = import.meta.env?.DEV ?? true;
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@cubic-dev-ai cubic-dev-ai bot Mar 5, 2026 •
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P2: isDev falls back to true, which can unintentionally enable debug logs outside development when env metadata is unavailable.

Prompt for AI agents 
Check if this issue is valid — if so, understand the root cause and fix it. At src/utils/logger.ts, line 12:

<comment>`isDev` falls back to `true`, which can unintentionally enable debug logs outside development when env metadata is unavailable.</comment>

<file context>
@@ -0,0 +1,28 @@
+};
+
+class Logger {
+  private isDev = import.meta.env?.DEV ?? true;
+
+  private log(level: LogLevel, message: string, data?: unknown): void {
</file context>
Suggested change
private isDev = import.meta.env?.DEV ?? true;
private isDev = import.meta.env?.DEV ?? false;
Fix with Cubic


private log(level: LogLevel, message: string, data?: unknown): void {
if (!this.isDev && level === 'debug') return;
const timestamp = new Date().toISOString().slice(11, 23);
const prefix = '[' + timestamp + '] [' + level.toUpperCase() + ']';
if (data) { console.log('%c' + prefix + ' ' + message, LOG_COLORS[level], data); }
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@cubic-dev-ai cubic-dev-ai bot Mar 5, 2026 •
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P2: Falsy payload values are silently dropped because data is checked with truthiness instead of undefined presence.

Prompt for AI agents 
Check if this issue is valid — if so, understand the root cause and fix it. At src/utils/logger.ts, line 18:

<comment>Falsy payload values are silently dropped because `data` is checked with truthiness instead of `undefined` presence.</comment>

<file context>
@@ -0,0 +1,28 @@
+    if (!this.isDev && level === 'debug') return;
+    const timestamp = new Date().toISOString().slice(11, 23);
+    const prefix = '[' + timestamp + '] [' + level.toUpperCase() + ']';
+    if (data) { console.log('%c' + prefix + ' ' + message, LOG_COLORS[level], data); }
+    else { console.log('%c' + prefix + ' ' + message, LOG_COLORS[level]); }
+  }
</file context>
Fix with Cubic

else { console.log('%c' + prefix + ' ' + message, LOG_COLORS[level]); }
}

debug(msg: string, data?: unknown) { this.log('debug', msg, data); }
info(msg: string, data?: unknown) { this.log('info', msg, data); }
warn(msg: string, data?: unknown) { this.log('warn', msg, data); }
error(msg: string, data?: unknown) { this.log('error', msg, data); }
}

export const logger = new Logger();
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