{"data":{"id":"c9d775af-39a2-410f-81bb-b4ccbe99612c","title":"Claude system prompts as a git timeline","summary":"A researcher converted Anthropic's published Claude system prompts (the hidden instructions that guide Claude's behavior) from a single markdown document into a git repository (a version control system that tracks file changes over time) with timestamped commits, allowing easier exploration of how the prompts have evolved across different Claude model versions using standard git tools like `log` and `diff`.","solution":"N/A -- no mitigation discussed in source.","labels":["research"],"sourceUrl":"https://simonwillison.net/2026/Apr/18/extract-system-prompts/#atom-everything","publishedAt":"2026-04-18T12:25:00.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["Anthropic"],"affectedVendorsRaw":["Anthropic","Claude"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-04-18T12:25:00.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":null,"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.75,"researchCategory":null,"atlasIds":null}}