Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/diegomarino/awesomic-cursor-rules/logging-javascriptgit clone --depth 1 https://github.com/diegomarino/awesomic-cursor-rulesWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.02995 |
| Opus 5 | $0.00000 | $0.01497 |
| Sonnet 5 | $0.00000 | $0.00599 |
| Haiku 4.5 | $0.00000 | $0.00299 |
Grade A, and why
logging-javascript scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 395 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Logging Guidelines for the Application
1. Log Format Structure
- Rule: All logs must follow a consistent format with clear section separation
- Format:
timestamp ┃ [LEVEL] ┃ [context] ┃ [filename] ┃ message ┃ key1=value1 • key2=value2 - Example:
2025-02-08T21:32:48.101Z ┃ [INFO] ┃ [data] ┃ [process-csv.js] ┃ Processing started ┃ file=input.csv • rows=100 • type=user-data
2. Log Levels Usage
ERROR
Critical issues requiring immediate attention
[ERROR] ┃ [database.js] ┃ [db] ┃ Connection failed ┃ error=timeout • retries=3
- Purpose: Critical issues requiring immediate attention
- When to Use:
- System crashes
- Data corruption
- Security breaches
- Unrecoverable states
- Business critical failures
logger.error(message, {
filename: string // Required: filename where this log is triggered
context: string, // Required: Error context (e.g., 'db', 'auth')
error: { // Required: Error details
code: string, // Error classification code
message: string, // Error description
stack?: string, // Stack trace
type?: string // Error type/category
},
impact: string, // Required: Business impact description
recovery?: string[], // Recommended: Recovery steps
data?: object, // Optional: Related data (non-sensitive)
metrics?: { // Optional: Performance metrics
duration?: number,
attempts?: number
}
});
logger.error('Database connection failed', {
filename: 'database_connection.js',
context: 'db',
error: {
code: 'DB_CONN_001',
message: error.message,
stack: error.stack,
type: 'ConnectionError'
},
impact: 'System unable to process transactions',
recovery: [
'Check database credentials',
'Verify network connectivity'
],
metrics: {
duration: 1500,
attempts: 3
}
});
WARN
Unexpected conditions that don't stop execution
[WARN] ┃ [auth.js] ┃ [security] ┃ Too many login attempts ┃ user=john • attempts=5
- Purpose: Unexpected conditions requiring attention
- When to Use:
- Resource thresholds exceeded
- Deprecated feature usage
- Retry attempts
- Performance degradation
- Security concerns
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 395 lines · 2,995 tokens per session scan A f9c6540d2be9
logging-javascript is a cursor rule published in the GitHub repository diegomarino/awesomic-cursor-rules (10 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,995 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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