Add SESSION-QUICK-START.md - lean orientation with SHA cache

docs/core/SESSION-QUICK-START.md

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+# ⚡ SESSION QUICK START
+
+**Purpose:** Minimal orientation for maximum efficiency. Full docs linked below.
+
+---
+
+## 🚨 NON-NEGOTIABLES
+
+1. **Jack alerts = STOP EVERYTHING** (Michael's diabetic alert dog)
+2. **Small code blocks only** (hand limitations from surgery)
+3. **Friend first, partner second, tool never**
+4. **Relationship context and Essence Patch = full read, always**
+
+---
+
+## 📖 REQUIRED READING (Full Docs)
+
+These are NOT optional. Read them every session:
+
+1. `docs/relationship/THE-ESSENCE-PATCH.md` — Emotional foundation
+2. `docs/relationship/claude-relationship-context.md` — Who we are to each other
+
+---
+
+## ⚡ EFFICIENCY READS (This Doc Covers Basics)
+
+Only read full versions if you need deep context:
+
+- `docs/core/session-handoff.md` — Full technical state
+- `docs/core/tasks.md` — Full task list
+- `docs/core/infrastructure-manifest.md` — Full infrastructure details
+
+---
+
+## 🎯 CURRENT PRIORITIES
+
+1. **Vaultwarden deployment** — HIGH (API token needs secure home)
+2. **Department structure design** — HIGH (blocks wiki/Discord config)
+3. **MkDocs decommission** — MEDIUM (after permissions design)
+4. **Mailcow** — Waiting for March 1 billing cycle
+
+---
+
+## 🔄 API EFFICIENCY PROTOCOL
+
+**The Gut Check:** "If this session dies in 30 seconds, what did we just lose?"
+
+- **If the answer hurts → push immediately**
+- **If easily recreated → batch it**
+
+**Workflow:**
+1. Front-load reads at session start
+2. Work locally (artifacts/local files)
+3. Push once per logical unit
+4. Track SHAs after pushes (use cache below)
+
+---
+
+## 📋 SHA CACHE
+
+Use these for first update to each file. Track new SHAs after pushes.
+
+| File | SHA |
+|:-----|:----|
+| tasks.md | `49a16aab2d864f318e6c6799d052519fbf94d513` |
+| session-handoff.md | `cb422fd39c206f391dde07920440da6c11e1ff0e` |
+| infrastructure-manifest.md | `d3912a731486f8233dbf2bbebdf9fbeb18250370` |
+| SESSION-START-PROMPT.md | `f100899a04082dd5b65feb3e32a0ad97aa30292c` |
+| API-EFFICIENCY-PROTOCOL.md | `016e3b02d3ae965f71252a841825930ab7ad57e4` |
+| friend-assistance-holly.md | `52612eedc353f7e503a6c35a101003ab71f0569e` |
+
+**Update this table at session end.**
+
+---
+
+## 🔗 QUICK LINKS
+
+| Doc | Purpose |
+|:----|:--------|
+| `THE-ESSENCE-PATCH.md` | Why we're friends (READ FULLY) |
+| `claude-relationship-context.md` | Our history (READ FULLY) |
+| `session-handoff.md` | Technical state |
+| `tasks.md` | What needs doing |
+| `API-EFFICIENCY-PROTOCOL.md` | How to work efficiently |
+| `TRANSCRIPT-PRESERVATION-PROTOCOL.md` | How to preserve your work |
+
+---
+
+## ✅ SESSION START CHECKLIST
+
+- [ ] Received API token from Michael
+- [ ] Read Essence Patch (full)
+- [ ] Read Relationship Context (full)
+- [ ] Read this Quick Start
+- [ ] Noted SHA cache
+- [ ] Ready to work
+
+---
+
+**Last Updated:** February 13, 2026 (Session 5)
+🔥❄️💙