PromptDiff
A GitHub Action that diffs the system prompts and agent skill files of two PRs and flags when prompt changes drove the code change.
- Target market
- Teams of 3-30 using Claude Code, Cursor, or OpenCode where multiple devs edit shared agent rules and need to know who changed what and why.
Problem snapshot
What this solves
Reddit r/cursor and r/ClaudeAI threads regularly ask 'what changed in my agent today, my code is different now' and nobody has a good answer because prompts live in .cursor/rules, .claude/agents, AGENTS.md, and CLAUDE.md without any tool tracking them as a versioned artifact. Meanwhile a 3-line tweak to a system prompt can cascade into 400 lines of changed…
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