5 questions · ~3 minutes · browser-only, no signup, no telemetry · CC0 · v1.0 (2026-05-29)
The decision: CC Safety Lab Founder Membership is ¥500/month (about $3.30) for monthly updates on Claude Code's emerging failure clusters with fixes and copy-paste defense hooks. This 5-question diagnostic estimates whether the subscription matches your operator setup — or whether the free hooks in this repository are enough.
Disclosure: The recommendation below routes to the CC Safety Lab Founder Membership (¥500/month, hosted on Ko-fi) where the score indicates a strong fit. The free hooks at cc-safe-setup and the free May 2026 issue Part 1 preview Gist (~6,000 words) cover the core defenses; the membership is only useful if multiple factors below indicate ongoing exposure to new incident patterns.
5 Questions
Your Safety Lab Fit Score
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About the Score
The diagnostic produces a 0–85 score across five factors. The bands are calibrated to the cost-of-one-avoided-incident vs ¥500/month subscription cost:
Score 55–85 (Strong fit): Multiple factors indicate ongoing exposure to new failure patterns. The ¥500/month subscription typically pays for itself in 1–3 months through avoided incidents.
Score 30–54 (Moderate fit): Some exposure to new patterns. Consider the Founder tier (price locked) and evaluate over 2–3 months. The free hooks in this repository may cover most of your needs.
Score 0–29 (Weak fit): Your current setup has low exposure to new failure clusters. The free hooks at cc-safe-setup and the free May 2026 issue Part 1 preview Gist likely cover what you need.
What You Get
If the score indicates a fit, here is what each monthly issue contains:
4–8 newly-emerged failure clusters with reproduction steps and fixes, sourced from GitHub Issues, Reddit r/ClaudeAI, HN, and ~800 hours of autonomous operation.
1 deep-dive failure case with forensic analysis (recovery path, prevention pattern, hook integration).
1–2 copy-paste defense hooks ready to drop into ~/.claude/hooks/ with installation instructions.
An updated safety checklist reflecting the month's new patterns.
Product update notes linking to the one-time companion books (Token Book, Migration Playbook, Postmortems, Claim-Verify Handbook, Sub-Agent Observability Handbook).
Cadence guarantee: each issue ships within 14 days of each cluster's emergence in the public signal sources. The Cluster Tracker page shows 12 structural clusters across 11,820+ cumulative reactions as of 2026-05-29, with the most recent (Cluster 12, Tool Call Parsing failures in Opus 4.7) shipping defense hooks within 24 hours of cluster articulation.
Free Materials First
Before subscribing, these free materials cover the core defenses and may already be enough:
cc-safe-setup — 8 essential safety hooks installable via npx cc-safe-setup. MIT licensed.
May 2026 issue Part 1 preview Gist — ~6,000 words covering 9 incident clusters from 2026-04-25 to 2026-05-02 with issue numbers and remediation steps. Full Part 1 is free.
Cluster Tracker — public registry of the 12 tracked failure clusters with shipped defense hooks.
Safety Lab landing page — full description of the subscription, monthly cadence, and value proposition.