diff --git a/CHECKPOINT-encryption.md b/CHECKPOINT-encryption.md
index 289ff65..0722ccd 100644
--- a/CHECKPOINT-encryption.md
+++ b/CHECKPOINT-encryption.md
@@ -1,4 +1,98 @@
-# Checkpoint — Neon theme (2026-08-24)
+# Checkpoint — Glass theme fix (2026-08-24)
+
+A stopping point you can return to if this session is closed. Everything below was
+verified green at the moment this file was written.
+
+## Where things are
+
+- Project: `/home/avi/Projects/Nostr_Keynctr`
+- Git repo: `master` @ `bfe14f0` ("Fix glass theme: repair broken Default impl
+  that blocked all builds"). Before it: `db2d22f` (glass theme added),
+  `a01f258` (system theme removed), `c080a8d` (icon), `90d699c` (neon).
+- Working tree: clean apart from this checkpoint update. Note: `concept3.svg`
+  still shows as deleted and `KeynectrAppIconPossibility02.jpeg` is untracked —
+  left exactly as the user had them, not committed.
+
+## What was completed
+
+1. **Root cause found: the repo did not compile since `a01f258`.** That commit
+   removed `Theme::System` from the enum but missed `Settings::default()`
+   (`src/settings.rs` still said `theme: Theme::System`). Every rebuild failed,
+   so the desktop app kept spawning an old `target/release/keynectr` binary
+   from before glass existed — which rejected `'glass'` on save ("nothing
+   happens") and explains the flaky "Rust backend exited unexpectedly"
+   launches.
+2. **Fixes in `bfe14f0`:**
+   - `src/settings.rs`: default theme is now `Theme::Light`.
+   - `src/main.rs`: CLI error message lists `light, dark, glass, neon`
+     (no stale "system").
+   - `frontend/src/styles.css`: removed ~600 lines of garbage — 24 broken
+     `:root[data-theme='glass']` blocks nested *inside* the neon rule (a bad
+     edit had interleaved them). One clean neon block + one clean glass block
+     remain, values preserved.
+   - `frontend/src/state/AppProvider.tsx`: theme now applies reactively — a
+     `useEffect` watches `state.settings.theme` and calls `applyTheme()`,
+     replacing the mount-only `useThemeSync()` call, so picking Glass/Neon
+     updates `data-theme` on `<html>` immediately.
+3. Rebuilt both artifacts the app actually runs: `cargo build --release`
+   (Electron spawns `target/release/keynectr`, see `electron/main.ts:82`) and
+   `npm run build` (renderer loads `dist/`).
+
+## Commits added most recently
+
+- `bfe14f0` Fix glass theme: repair broken Default impl that blocked all builds
+
+## Verification commands run (all green)
+
+Rust (repo root):
+
+```
+cargo test            # 113 passed; 0 failed
+cargo clippy --all-targets   # only pre-existing warnings in src/profiles.rs
+cargo fmt --check     # clean
+cargo build --release # success
+```
+
+Frontend (`frontend/`):
+
+```
+npm test              # 14 files, 92 tests passed
+npm run typecheck     # clean
+npm run lint          # 0 errors
+npm run format:check  # clean
+npm run electron:build  # tsc electron main success
+npm run build         # vite build success
+```
+
+## How to use / reproduce
+
+```bash
+cd ~/Projects/Nostr_Keynctr/frontend && npm start
+```
+
+Settings → Appearance → Theme → **Glass** applies immediately (dark panels,
+cyan `#7fdbff` accents) and persists to settings.json. Neon/Light/Dark behave
+the same way.
+
+CLI:
+
+```bash
+B=~/Projects/Nostr_Keynctr/target/release/keynectr
+$B settings set theme glass
+```
+
+## Notes & next steps
+
+- If themes ever seem ignored again, first check `cargo check` passes — a
+  broken build silently leaves the stale release binary in place.
+- Pre-existing clippy warnings in `src/profiles.rs` remain untouched (user
+  asked for theme-only changes).
+- Electron GPU/Wayland messages (`--ozone-platform=wayland ... Vulkan`) are
+  environmental noise on this laptop, not app errors.
+
+---
+
+# Older checkpoint — Neon theme (2026-08-24)
 
 A stopping point you can return to if this session is closed. Everything below was
 verified green at the moment this file was written.