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/goranerhartic/cursor-development-rules/logging-tracinggit clone --depth 1 https://github.com/GoranErhartic/cursor-development-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 | $0.00021 | $0.00309 |
| Opus 5 | $0.00010 | $0.00154 |
| Sonnet 5 | $0.00004 | $0.00062 |
| Haiku 4.5 | $0.00002 | $0.00031 |
Grade A, and why
logging-tracing 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 2d ago.
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.
What it actually says
Lambda X-Ray Tracer
Setup
- Powertools Tracer:
new Tracer({ serviceName, captureHTTPsRequests: true }); singleton; use in handler and services - Trace ID:
process.env._X_AMZN_TRACE_ID; parse for traceId/parentId/sampled if needed for logging or external systems - AWS SDK:
tracer.captureAWSv3Client(new S3Client({}))(and similar) to capture SDK calls automatically
Subsegments
- Manual:
const subsegment = segment?.addNewSubsegment('name'); add annotations (addAnnotation), errors (addError);subsegment?.close()in finally - Use for key operations (e.g. processMessage, validateUpload) to see timing and errors in service map
Middleware
- Use Powertools tracer middleware (or Middy middleware) so handler is wrapped; ensure subsegments are closed on error paths
Conventions
- One Tracer per service; capture SDK clients; add subsegments for important steps; include correlationId/traceId in logs
Anti-Patterns
- Not closing subsegments; capturing sensitive data in annotations; missing error recording
See also: logging-setup.mdc, logging-tracing-capture.mdc, logging-metrics-correlation.mdc
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.
- 2d ago First seen · 31 lines · 21 tokens per session scan A 10c46e5531f4
logging-tracing is a cursor rule published in the GitHub repository GoranErhartic/cursor-development-rules (19 stars, last pushed 6mo ago), licensed MIT. It adds 21 tokens to every session and 309 once invoked, about $0.0001 per session on Opus 5. 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 2026-08-30.
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