Add module docs to binaries

1 files changed, 6 insertions, 0 deletions

diff --git a/src/bin/r2md-fence.rs b/src/bin/r2md-fence.rs
index cced391..b25b5c6 100644
--- a/src/bin/r2md-fence.rs
+++ b/src/bin/r2md-fence.rs
@@ -1,3 +1,9 @@
+//! Entry point for the `r2md-fence` helper binary.
+//!
+//! This binary reads stdin, wraps it in a Markdown fenced code block, and writes the result to
+//! stdout. It is useful for safely embedding generated Markdown or arbitrary text inside LLM
+//! prompts or another Markdown document.
+
 use std::io;
 
 use clap::Parser;