Add session start prompt template for consistent development workflow

templates/session-start-prompt.md

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+# Session Start Prompt Template
+
+Use this prompt at the beginning of each development session:
+
+```
+Neural Nexus development check-in:
+
+**SESSION FOCUS:**
+- What game feature are we working on today?
+- Any performance issues or player feedback from last session?
+- Which devices should we test the latest changes on?
+- Priority focus: gameplay mechanics, visual polish, or technical optimization?
+
+**QUICK STATUS:**
+- Current build status and any blockers?
+- Recent player testing feedback or observations?
+- Performance metrics from last session?
+
+**TODAY'S GOALS:**
+- Primary objective for this session?
+- Secondary tasks if time permits?
+- Any experimental features to explore?
+
+Keep response concise and action-oriented to start productive development.
+```
+
+## Usage Notes
+
+- **Always use at session start** - helps Claude understand current context
+- **Modify based on stage** - adjust focus areas for Exploration/Prototype/Development
+- **Include specific concerns** - mention any particular issues you're facing
+- **Set clear priorities** - helps focus the session on what matters most
+
+## Example Usage
+
+```
+Neural Nexus development check-in:
+
+**SESSION FOCUS:**
+- Working on audio system integration today
+- Touch controls felt sluggish on iPhone testing yesterday
+- Need to test on Android Chrome and desktop Firefox
+- Priority: technical optimization for mobile performance
+
+**QUICK STATUS:**
+- Core game mechanics working well, particle effects smooth
+- Players report confusion about dotted line patterns on smaller screens
+- Getting 45fps on iPhone 12, want to improve to 55+fps
+
+**TODAY'S GOALS:**
+- Implement Web Audio API for sound effects
+- Optimize touch event handling for better responsiveness
+- Test pattern visibility improvements on mobile devices
+```