See exactly what changed in AI system prompts.
Side-by-side diffs and timelines for the hidden instructions behind ChatGPT, Claude, Gemini, Grok, Cursor and more.
219products tracked
17companies
552updates (2790 file changes)
12updates in the last 7 days
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Latest updates
- Update claude-code skills
claude-code33 files, 8 new +131 -86Oct 16, 2026 - Some formatting fixes
claude-4.1-opus-thinking claude-opus-4.5 claude-opus-4.6 claude-opus-4.6-no-tools claude-sonnet-4.6-no-tools stack-overflow-ai-assist6 files +605 -605Oct 14, 2026 - Update claude-code skills
claude-code16 files +102 -64Oct 14, 2026 - Create gemini-4-argon-api-ai-studio.md
gemini-4-argon-api-ai-studio1 file, 1 new +0 -0Oct 14, 2026 - Update claude-code system prompts
claude-code19 files, 6 new +1335 -6132Oct 13, 2026 - Add Duck.ai system prompt
duck-ai1 file, 1 new +0 -0Oct 12, 2026 - normalize formatting
claude-code claude-cowork claude-opus-4.6 claude-opus-4.6-no-tools claude-opus-4.8 claude-opus-5 +19 more30 files +0 -0Oct 11, 2026 - Update claude-code skills
claude-code31 files, 4 new +550 -183Oct 10, 2026 - Update claude-code skills
claude-code1 file +33 -2Oct 10, 2026 - Update claude-code skills
claude-code2 files +16 -16Oct 10, 2026 - Add Claude artifact type skills (Slides, Dashboard, Design, Docs)
artifact-types34 files, 34 new +0 -0Oct 10, 2026 - Update Claude Code system prompts (2.1.295)
claude-code13 files +367 -305Oct 09, 2026 - Update claude-code skills
claude-code16 files, 4 new +455 -231Oct 08, 2026 - Update claude-code skills
claude-code41 files, 11 new +506 -190Oct 07, 2026 - Add Claude Haiku 5.5 system prompt (claude.ai)
claude-haiku-5.52 files, 2 new +0 -0Oct 07, 2026 - Update Claude Code system prompts (2.1.293)
claude-code12 files +334 -70Oct 07, 2026 - Add Haiku 5.5 system prompt (Claude Code)
claude-code1 file, 1 new +0 -0Oct 07, 2026 - Add official Claude Haiku 5.5 system prompt (October 7, 2026)
official2 files, 1 new +192 -0Oct 07, 2026 - Add Claude Code plan mode system message
claude-code1 file, 1 new +0 -0Oct 07, 2026 - Update Claude Design system prompt and starter components
claude-design4 files +2181 -216Oct 07, 2026 - Update claude-sonnet-5.5.md
claude-sonnet-5.51 file +32 -32Oct 06, 2026 - Update Claude Code system prompts (2.1.290)
claude-code12 files +5644 -89Oct 06, 2026 - Add ChatGPT Dots system prompts
dots32 files, 32 new +0 -0Oct 05, 2026 - Add ChatGPT dot voice initialization and coordination prompt fragment (#237)
chatgpt-dot-voice-coordination1 file, 1 new +0 -0Oct 05, 2026 - Update muse-spark-1.3-muse-code.md
muse-code1 file +9 -0Oct 04, 2026 - Add Muse Spark 1.3 system prompt (Muse Code)
muse-code muse-spark-1.0-web muse-spark-1.1-web82 files, 80 new +13 -13Oct 04, 2026 - Add Meta Muse agent system prompt (VM files)
muse-agent383 files, 383 new +0 -0Oct 04, 2026 - Update claude-code prompts
claude-code14 files +1599 -1762Oct 04, 2026 - Update claude-code prompts to 2.1.289
claude-code12 files +220 -77Oct 04, 2026 - Add Grok 4.7 system prompt (grok.com)
grok-4.7 grok-4.7-cli2 files, 1 new +560 -1476Oct 03, 2026