diff --git a/backend/CLAUDE.md b/backend/CLAUDE.md
index f6413c48..3484ce80 100644
--- a/backend/CLAUDE.md
+++ b/backend/CLAUDE.md
@@ -4,7 +4,7 @@ FastAPI orchestrator. Entry: `backend/main.py` (uvicorn `:8324`, REST `/api/*`,
 
 ## Coding precedences
 
-Full precedences live in root [CLAUDE.md](../.claude/CLAUDE.md). Always: **understand the end goal before coding** (what does the user actually need?); **reuse before you write** (grep existing routes / SubApps / helpers, most needs already have one); ~300 LOC/file ceiling; downward-tree imports; no comments except WHY-non-obvious; **no em-dashes or en-dashes anywhere** (`—`, `–`); say IDK to the user when you don't know, then go find out; test after meaningful changes; weigh speed, efficiency, robustness, UX, and security on every change.
+Full precedences live in root [CLAUDE.md](../.claude/CLAUDE.md). Always: **understand the end goal before coding** (what does the user actually need?); **reuse before you write** (grep existing routes / SubApps / helpers, most needs already have one); ~300 LOC/file ceiling; downward-tree imports; comments only when necessary (the non-obvious WHY), one line each; **no em-dashes or en-dashes anywhere** (`—`, `–`); say IDK to the user when you don't know, then go find out; test after meaningful changes; weigh speed, efficiency, robustness, UX, and security on every change.
 
 ## Run / test
 
diff --git a/electron/CLAUDE.md b/electron/CLAUDE.md
index d07e77f6..49a29180 100644
--- a/electron/CLAUDE.md
+++ b/electron/CLAUDE.md
@@ -4,7 +4,7 @@ Electron 40.x (CastLabs DRM build) desktop shell + auto-updater via GitHub Relea
 
 ## Coding precedences
 
-Full precedences live in root [CLAUDE.md](../.claude/CLAUDE.md). Always: **understand the end goal before coding** (what does the user actually need?); **reuse before you write** (grep existing IPC handlers / helpers in `main.js`, most needs already have one); ~300 LOC/file ceiling; downward-tree imports; no comments except WHY-non-obvious; **no em-dashes or en-dashes anywhere** (`—`, `–`); say IDK to the user when you don't know, then go find out; test the packaged build path after meaningful changes (not just dev); weigh speed (startup time), efficiency (memory), robustness (auto-updater, OAuth windows), UX, and security (signed binaries, no plaintext secrets) on every change.
+Full precedences live in root [CLAUDE.md](../.claude/CLAUDE.md). Always: **understand the end goal before coding** (what does the user actually need?); **reuse before you write** (grep existing IPC handlers / helpers in `main.js`, most needs already have one); ~300 LOC/file ceiling; downward-tree imports; comments only when necessary (the non-obvious WHY), one line each; **no em-dashes or en-dashes anywhere** (`—`, `–`); say IDK to the user when you don't know, then go find out; test the packaged build path after meaningful changes (not just dev); weigh speed (startup time), efficiency (memory), robustness (auto-updater, OAuth windows), UX, and security (signed binaries, no plaintext secrets) on every change.
 
 ## Build / release
 
diff --git a/frontend/CLAUDE.md b/frontend/CLAUDE.md
index 26d734f2..acf3339d 100644
--- a/frontend/CLAUDE.md
+++ b/frontend/CLAUDE.md
@@ -4,7 +4,7 @@ React 18 + TypeScript + webpack 5 + Redux. Entry: `src/app/Main.tsx`. Dev server
 
 ## Coding precedences
 
-Full precedences live in root [CLAUDE.md](../.claude/CLAUDE.md). Always: **understand the end goal before coding** (what does the user actually need?); **reuse before you write** (grep existing components / hooks / Redux slices, most needs already have one); ~300 LOC/file ceiling; downward-tree imports (`shared/` → `app/components/` → `pages/`); no comments except WHY-non-obvious; **no em-dashes or en-dashes anywhere** (`—`, `–`); say IDK to the user when you don't know, then go find out; manually exercise the UI after meaningful changes; weigh speed (no double renders), efficiency, robustness, UX (loading/error/animation states), and security on every change.
+Full precedences live in root [CLAUDE.md](../.claude/CLAUDE.md). Always: **understand the end goal before coding** (what does the user actually need?); **reuse before you write** (grep existing components / hooks / Redux slices, most needs already have one); ~300 LOC/file ceiling; downward-tree imports (`shared/` → `app/components/` → `pages/`); comments only when necessary (the non-obvious WHY), one line each; **no em-dashes or en-dashes anywhere** (`—`, `–`); say IDK to the user when you don't know, then go find out; manually exercise the UI after meaningful changes; weigh speed (no double renders), efficiency, robustness, UX (loading/error/animation states), and security on every change.
 
 ## Run