workers-observability

Cloudflare Workers observability with logging, Analytics Engine, Tail Workers, metrics, and alerting. Use for monitoring, debugging, tracing, or encountering log parsing, metric aggregation, alert configuration errors.

1.19x

Quality

88%

Does it follow best practices?

Impact

97%

1.19x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Evaluation results

97%

22%

Production Logging for a User Authentication Worker

Structured logging with redaction and sampling

Criteria

Without context

With context

JSON structured logs

100%

requestId in every log

100%

cf-ray header usage

100%

Password redaction

100%

Token/auth redaction

100%

Error level for failures

62%

Warn level for recoverable

100%

Timestamp in log entry

100%

Log sampling implemented

100%

Errors/warns bypass sampling

100%

observability in wrangler

100%

22%

Custom Performance Metrics for a Content Delivery Worker

Analytics Engine metrics tracking

Criteria

Without context

With context

writeDataPoint used

100%

blobs for categorical data

100%

doubles for numeric data

100%

indexes used for filtering

100%

ctx.waitUntil for writes

25%

100%

Consistent schema

100%

Error path instrumented

62%

100%

ANALYTICS binding in wrangler

100%

Schema documented

100%

Queries use blob/double names

100%

Response time recorded

100%

94%

Production Alerting Pipeline for a Payment Processing Worker

Tail Worker alerting pipeline

Criteria

Without context

With context

tail_consumers in producer

100%

Service name matches

100%

Tail Worker exports tail()

100%

Filters errors only

100%

Alert cooldown logic

100%

Cooldown duration >= 5 min

100%

Alert deduplication key

40%

Slack alert with context

100%

KV for state storage

100%

KV binding in wrangler

100%

No alert on ok outcome

100%

Repository: secondsky/claude-skills
Commit: 90d6bd7

Evaluated: 29 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Production Logging for a User Authentication Worker Custom Performance Metrics for a Content Delivery Worker Production Alerting Pipeline for a Payment Processing Worker

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