Add feature installer script for L&L-compatible installs

Provides an alternative install method where users run a script on a
standard Loop clone after applying any L&L customizations. The script
uses anchor-based text insertion and 3-way merges to adapt to whatever
patches are already present, making all L&L customizations compatible.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: taylorpatterson-T1D

INSTALL.md

@@ -0,0 +1,83 @@
+# Install FoodFinder + LoopInsights + AutoPresets
+
+Add AI-powered food analysis, therapy settings insights, and automatic preset management to your Loop app — compatible with all Loop & Learn customizations.
+
+## Quick Start
+
+### 1. Build Loop the normal way first
+
+Follow the standard LoopDocs build instructions through the cloning step:
+https://loopkit.github.io/loopdocs/build/step4/
+
+```bash
+git clone --branch=main --recurse-submodules https://github.com/LoopKit/LoopWorkspace
+cd LoopWorkspace
+```
+
+### 2. (Optional) Apply any Loop & Learn customizations you want
+
+https://www.loopandlearn.org/custom-code/
+
+All L&L patches (Profiles, Basal Lock, Negative Insulin, etc.) are compatible. Apply them first — our installer adapts to whatever's already there.
+
+### 3. Run one command
+
+```bash
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/TaylorJPatterson/LoopWorkspace/feat/installer/Scripts/install_features.sh)"
+```
+
+That's it. The script downloads everything it needs, installs 77 new files, patches 11 existing files, updates the Xcode project, and validates the result.
+
+### 4. Build in Xcode
+
+1. Open `LoopWorkspace.xcworkspace` in Xcode
+2. Select your signing team
+3. Build and run (Cmd+R)
+
+### 5. Enable features in the app
+
+All features are **off by default**. Turn them on in Loop Settings:
+
+- **FoodFinder** — AI-powered & barcode food analysis
+- **LoopInsights** — AI-powered therapy settings analysis
+- **AutoPresets** — Automate presets during motion
+
+You'll need an AI API key (OpenAI, Anthropic, or Google) for the AI features. Enter it in FoodFinder Settings — LoopInsights shares the same key.
+
+---
+
+## Uninstalling
+
+```bash
+./Scripts/install_features.sh --rollback
+```
+
+Removes all feature files and restores Loop to its pre-install state (including any L&L patches you had applied).
+
+## Updating
+
+```bash
+./Scripts/install_features.sh --rollback
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/TaylorJPatterson/LoopWorkspace/feat/installer/Scripts/install_features.sh)"
+```
+
+## L&L Compatibility
+
+| L&L Customization | Compatible | Notes |
+|---|---|---|
+| Profiles | Yes | Our features insert below Profiles in Settings |
+| Basal Lock | Yes | Different code regions than our features |
+| Negative Insulin | Yes | Different code regions than our features |
+| Future Carbs 4h | Yes | Both modify CarbEntryView.swift in different regions; 3-way merge handles it |
+| Override Insulin Needs Picker | Yes | No overlapping files |
+| All other L&L patches | Yes | Our installer only modifies Loop submodule files |
+
+## Troubleshooting
+
+**"Anchor not found" error**: Your Loop version may be too old or too new. The installer targets Loop dev branch (v3.10.x+). Make sure you cloned the latest LoopWorkspace.
+
+**Merge conflicts during patching**: If the installer reports conflicts, check the affected file for `<<<<<<<` conflict markers and resolve them manually.
+
+**Xcode build errors after install**: Try a clean build (Cmd+Shift+K, then Cmd+R). If issues persist, run `--rollback` and re-install.
+
+**plutil validation failure**: The Xcode project file update failed. The installer automatically restores the backup. Try again — if it persists, file an issue.

LoopConfigOverride.xcconfig

@@ -13,4 +13,4 @@
 SWIFT_ACTIVE_COMPILATION_CONDITIONS = $(inherited) EXPERIMENTAL_FEATURES_ENABLED SIMULATORS_ENABLED ALLOW_ALGORITHM_EXPERIMENTS DEBUG_FEATURES_ENABLED
 
 // Put your team id here for signing
-//LOOP_DEVELOPMENT_TEAM = UY678SP37Q
+LOOP_DEVELOPMENT_TEAM = 4S2EW2Q6ZW