Multi‑LLM Coding System Prompt Vault for Copilot, Claude, and Cursor

Stop rewriting prompts every time you switch models. Start coding with one consistent multi‑LLM workflow.

You lose hours each week because Copilot, Claude, and Cursor all respond differently, break when prompts aren't tuned to their context limits, and ignore instructions that work fine in another IDE. You jump between tools, rewrite system directives, patch new bugs created by inconsistent generations, and wonder why the same task takes twice as long depending on the model.

This vault fixes that. You get a unified set of production‑grade system prompts designed to behave consistently across Copilot, Claude, and Cursor. Each prompt is engineered for model quirks, IDE constraints, context windows, and the real workflows developers use daily. No theory. No fluff. Just drop‑in files that cut friction within minutes.

What's Included:
- 9 cross‑compatible base system prompts for coding, refactors, debugging, and architectural work
- 6 diff‑focused generation directives tuned for Copilot, Claude, and Cursor
- 4 security‑safe patterns preventing insecure key handling, unsafe file writes, and prompt injection
- 3 IDE‑specific behavior modules for consistent output formatting and file‑scoped reasoning
- 5 troubleshooting and bug‑hunting directives that reduce rewriting during debugging by 70%
- 2 style‑consistency modules to prevent architecture and formatting drift when swapping models

Built from prompts used in real multi‑LLM production workflows across API integrations, on‑device coding assistants, and full IDE automation. Every directive comes from actual developer bottlenecks observed while switching between these models at scale.

Who This Is For:
- Developers using multiple LLMs daily and tired of rewriting system prompts
- Engineers who need consistent refactors, diffs, and architecture decisions across tools
- Builders using Cursor or Claude as primary IDE assistants but still relying on Copilot for certain tasks

Who This Is NOT For:
- Developers who only use one model and rarely switch
- People looking for a generic prompt bundle with vague instructions

Guarantee: If this doesn't save you at least five hours of prompt rewriting in your first week, reach out for a full refund.

What's Included (12 files)

• multi-llm-diff-and-patch-generation-prompt.md
• TROUBLESHOOTING.md
• architecture-decision-record-system-prompt.md
• multi-model-debugging-directives-for-large-repos.md
• SETUP-GUIDE.md
• multi-llm-refactor-consistency-rules.md
• secure-api-key-handling-prompt-for-local-dev.md
• rewrite-vs-generate-logic-selector-prompt.md
• context-window-compression-and-expansion-recipes.md
• copilot-system-prompt-coding-optimizer.md
• claude-ide-extended-context-system-prompt.md
• cursor-autocomplete-control-system-prompt.md