diff --git a/CLAUDE.md b/CLAUDE.md
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index 0000000..bbcf851
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,33 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project
+
+Redactor is a two-pane text redaction GUI built in Rust with eframe/egui. Users paste text in the left panel, select regions and press Ctrl+R to toggle redaction, and the right panel shows a live preview with redacted regions replaced by block characters (U+2588). The entire application lives in `src/main.rs`.
+
+## Build & Run
+
+```bash
+cargo build              # debug build
+cargo build --release    # release build
+cargo run                # run the app
+```
+
+Nix flake provides the dev environment (Rust toolchain + native deps for egui). Direnv auto-loads it via `.envrc`.
+
+## Architecture
+
+All logic is in `src/main.rs` (~490 lines) in the `RedactorApp` struct:
+
+- **State**: source text (`String`) + sorted non-overlapping byte ranges (`Vec<Range<usize>>`) of redactions
+- **Left panel**: editable `TextEdit` with redacted regions highlighted via `LayoutJob` text formatting
+- **Right panel**: read-only preview where redacted bytes become full-block characters, preserving whitespace
+- **Reconciliation**: when source text is edited, `reconcile_redactions` adjusts byte ranges by detecting unchanged prefix/suffix regions
+- **Range operations**: `add_redaction` merges overlapping ranges; `remove_redaction` splits ranges; all operations snap to UTF-8 character boundaries
+
+## UI
+
+- Nord color palette (dark theme) with BrassMonoCode monospace font (bundled .ttf files, embedded at compile time)
+- Keyboard: Ctrl+R toggles redaction on selection, Cmd+Q quits
+- Toolbar has keyboard help and "Copy Redacted" button
diff --git a/fonts/BrassMono-Regular.ttf b/fonts/BrassMono-Regular.ttf
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Binary files /dev/null and b/fonts/BrassMono-Regular.ttf differ
diff --git a/fonts/BrassMonoCode-Regular.ttf b/fonts/BrassMonoCode-Regular.ttf
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index 0000000..c4f6b44
Binary files /dev/null and b/fonts/BrassMonoCode-Regular.ttf differ
diff --git a/src/main.rs b/src/main.rs
index b45d841..81c6d56 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,10 +13,7 @@ const NORD9: egui::Color32 = egui::Color32::from_rgb(0x81, 0xA1, 0xC1);
 const NORD11: egui::Color32 = egui::Color32::from_rgb(0xBF, 0x61, 0x6A);
 const NORD13: egui::Color32 = egui::Color32::from_rgb(0xEB, 0xCB, 0x8B);
 
-const BRASS_MONO: &[u8] = include_bytes!(concat!(
-    env!("HOME"),
-    "/.local/share/fonts/BrassMonoCode-Regular.ttf"
-));
+const BRASS_MONO: &[u8] = include_bytes!("../fonts/BrassMonoCode-Regular.ttf");
 
 fn main() -> eframe::Result {
     let options = eframe::NativeOptions {