Server Log Crawler Analyst

Server Log Crawler Analyst

Use this skill when credential-free monitoring evidence is enough, or when credentialed Search Console, rank tracking, analytics, or assistant citation tools are unavailable.

Read [references/data-source-tiers.md](references/data-source-tiers.md) before producing a monitoring report.

Owns

• credential-free monitoring baseline;
• server access-log summary with IP privacy protection;
• crawler/user-agent observation reports;
• public HTTP checks for robots, llms.txt, sitemaps, RSS, and representative URLs;
• data-source tiering;
• monitoring limitations and unknowns;
• backlog handoff for Search Console, rank/SERP, analytics, and LLM citation monitoring.

Does Not Own

• credentialed Search Console or analytics API work;
• scraping search engines;
• bypassing bot protections;
• live firewall or WAF changes;
• claims about rankings or assistant citations without direct evidence;
• storing raw IP logs in public artifacts.

Workflow

1. Identify available evidence: public URL fetches, access-log snippet, exported summary, or synthetic fixture.
2. Label the evidence tier and collection time.
3. If logs are provided, summarize requests by path, status, user-agent class, and redacted IP hash.
4. Separate known crawler hits from unknown bot-like traffic.
5. Check public discovery endpoints when requested.
6. Record limitations: no Search Console, no rank data, no assistant citation data unless explicitly provided.
7. Produce a monitoring report using [assets/crawler-monitor-report.template.md](assets/crawler-monitor-report.template.md).
8. Hand off credentialed or citation tasks to the backlog.

Non-Negotiables

• Do not publish raw IP addresses.
• Do not store credentials, cookies, API keys, or private analytics exports in skill files.
• Do not infer ranking, indexing, or citation success from server logs alone.
• Do not claim a user-agent is verified Google/OpenAI/Claude/Perplexity unless verification method is documented.
• Do not scrape SERPs or assistants against terms of service.
• Do not change firewall, WAF, robots, or server config from this skill.

Safety And Privacy Boundaries

• Treat raw logs as private by default.
• Use aggregated counts and redacted identifiers.
• Keep exact timestamps only when needed for evidence; otherwise aggregate by hour/day.
• If the user asks to publish a report, remove raw IP, query strings, session IDs, auth paths, and admin URLs unless explicitly needed and safe.
• Public reports should say "observed in provided logs" rather than "definitely crawled by" unless bot verification is complete.

Evidence Labels

• Observed: directly in log, HTTP response, or exported report.
• Verified: observed and checked by an accepted verification method.
• Inferred: likely based on user-agent/path/status, but not verified.
• Open: no evidence available in this run.

Validation

Validate skill edits with:

python3 $CODEX_HOME/skills/senior-skill-architect/scripts/lint_production_skill.py $HOME/SKILL/skills/server-log-crawler-analyst
python3 $HOME/SKILL/skills/server-log-crawler-analyst/scripts/analyze_access_log.py $HOME/SKILL/skills/server-log-crawler-analyst/fixtures/sample-access.log --report /tmp/server-log-crawler-report.json
python3 $HOME/SKILL/plans/seo-llm-skill-cluster/scripts/lint_skill_cluster.py $HOME/SKILL

Forward tests live in [evals.json](evals.json).

Output Shape

Return:

1. Evidence source and timestamp.
2. Data tier and privacy handling.
3. Observed crawler/user-agent classes.
4. Public endpoint status checks if performed.
5. Suspicious or irrelevant bot traffic summary.
6. Unknowns and claims refused.
7. Monitoring backlog and next evidence needed.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: sergekostenchuk
• Source: sergekostenchuk/ui-ux-agent-skill-system
• License: Apache-2.0

Install and usage instructions live in the source repository linked above.