Create sandbox handoff system for exploratory AI sessions

- docs/sandbox-sessions/ directory structure
- TEMPLATE.md (structured handoff format)
- README.md (workflow documentation)
- GEMINI-PROMPT.txt (quick-copy for end of sessions)

Enables organized brainstorming with Gemini, easy review in production.

docs/sandbox-sessions/GEMINI-PROMPT.txt

@@ -0,0 +1,34 @@
+At the end of our brainstorming session, please summarize our discussion in this format:
+
+---
+
+# Sandbox Session - [our topic]
+
+**Date:** [today's date]
+**AI Used:** Gemini
+**Duration:** [estimate]
+**Status:** Exploration
+
+## Topic
+[1-2 sentence summary of what we discussed]
+
+## Key Ideas
+[Bullet points of main concepts]
+
+## Recommended Approach
+[The best path forward from our brainstorming]
+
+## Open Questions
+[Things that still need exploration]
+
+## Technical Considerations
+[Any infrastructure, code, or implementation notes]
+
+## Ready for Production?
+**Status:** [YES / NO / NEEDS REFINEMENT]
+**Reasoning:** [Why or why not]
+**Next Steps:** [What needs to happen before implementation]
+
+---
+
+Thank you!

docs/sandbox-sessions/README.md

@@ -0,0 +1,37 @@
+# Sandbox Sessions Directory
+
+**Purpose:** Organize exploratory brainstorming sessions with alternate AIs (Gemini, ChatGPT, etc.)
+
+## Workflow
+
+1. **Brainstorm in Gemini** using SANDBOX-BRIEFING.md for context
+2. **At end of session**, ask Gemini to format output using TEMPLATE.md structure
+3. **Copy output** and save as new file: `gemini-[topic]-[date].md`
+4. **Commit to Git** for Production Claude to review
+5. **Implement in production** if validated
+
+## File Naming Convention
+
+- `gemini-ddos-strategy-2026-02-10.md`
+- `gemini-subscriber-auth-2026-02-15.md`
+- `chatgpt-discord-bot-ideas-2026-03-01.md`
+
+## Status Indicators
+
+- **Exploration:** Still thinking through ideas
+- **Ready for Review:** Needs Production Claude evaluation
+- **Implemented:** Idea executed in production
+- **Archived:** Decided against, kept for reference
+
+## Example Usage
+```
+1. Open Gemini
+2. Paste: https://raw.githubusercontent.com/frostystyle/firefrost-operations-manual/master/project-files/SANDBOX-BRIEFING.md
+3. Brainstorm: "Let's explore DDoS protection options"
+4. Ask Gemini: "Format our discussion using the template structure"
+5. Copy output → Save as gemini-ddos-options-2026-02-10.md
+6. git add, commit, push
+7. Production Claude reviews and implements if validated
+```
+
+**This keeps sandbox work organized and reviewable!**

docs/sandbox-sessions/TEMPLATE.md

@@ -0,0 +1,63 @@
+# Sandbox Session - [TOPIC]
+
+**Date:** [DATE]  
+**AI Used:** Gemini  
+**Duration:** [TIME]  
+**Status:** [Exploration / Ready for Review / Implemented]
+
+---
+
+## Topic
+
+[What we discussed - 1-2 sentences]
+
+---
+
+## Key Ideas
+
+[Bullet points of main concepts explored]
+
+- Idea 1
+- Idea 2
+- Idea 3
+
+---
+
+## Recommended Approach
+
+[The consensus/best path forward from brainstorming]
+
+---
+
+## Open Questions
+
+[Things that still need exploration or decision]
+
+- Question 1
+- Question 2
+
+---
+
+## Technical Considerations
+
+[Any infrastructure, code, or implementation notes]
+
+---
+
+## Ready for Production?
+
+**Status:** [YES / NO / NEEDS REFINEMENT]
+
+**Reasoning:** [Why or why not]
+
+**Next Steps:** [What needs to happen before implementation]
+
+---
+
+## Gemini Conversation Export
+
+[Optional: Paste key excerpts from Gemini chat if helpful]
+
+---
+
+**Fire + Frost = Where Passion Meets Precision** 🔥❄️