diff --git a/CLAUDE.md b/CLAUDE.md
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+See @TODO.md for next steps.
+
+This system has `nix-shell`. You can use `nix-shell` to get temporary tools you need and to start the development shell, defined in @shell.nix.
diff --git a/todo.md b/TODO.md
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rename from todo.md
rename to TODO.md
diff --git a/agents.md b/agents.md
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-# agents.md
-
-## Setup commands
-
-- Start development shell: `nix-shell`