diff --git a/Cargo.lock b/Cargo.lock
index 293877e..11dd848 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,4 +4,4 @@ version = 3
 
 [[package]]
 name = "tread"
-version = "0.2.0"
+version = "0.3.0"
diff --git a/Cargo.toml b/Cargo.toml
index dc82f9b..9ec0f26 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,13 +1,13 @@
 [package]
 name = "tread"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2021"
 rust-version = "1.75"
-description = "A terminal reader for markdown, CSV and JSON. Zero dependencies."
+description = "A terminal reader for markdown, CSV, JSON and source code. Zero dependencies."
 repository = "https://github.com/viict/tread"
 license = "MIT OR Apache-2.0"
 readme = "README.md"
-keywords = ["pager", "markdown", "csv", "json", "tui"]
+keywords = ["pager", "markdown", "csv", "json", "code"]
 categories = ["command-line-utilities", "text-processing"]
 
 [[bin]]
diff --git a/README.md b/README.md
index fd57d98..a8bb9f8 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,11 @@
 
 `less`, but it understands file types.
 
-A terminal reader for markdown, CSV, JSON and JSON Lines. Collapsible
-headings, banner H1s, real box-drawn tables, colored links, and navigation
-across a corpus of linked documents — and for data, files far too big to load:
+A terminal reader for markdown, CSV, JSON, JSON Lines and source code.
+Collapsible headings, banner H1s, real box-drawn tables, colored links, and
+navigation across a corpus of linked documents — in code, the same folds over
+declarations and the same `Enter` over an import — and for data, files far too
+big to load:
 a multi-GB CSV or JSON opens in milliseconds, because nothing reads the whole
 file. One static binary, no runtime, no configuration, **no dependencies at
 all** — not even `libc`. Every format is compiled in; nothing is ever loaded at
@@ -107,8 +109,12 @@ $ tread --index ~/notes
 | CSV | `.csv`, `.tsv` | any size; sniffed delimiter, `sep=` directive |
 | JSON | `.json` | any size; foldable tree, source-faithful values |
 | JSON Lines | `.jsonl`, `.ndjson` | any size; one record per line, lenses |
+| Code | `.rs`, `.ts` `.tsx` `.js` `.jsx` `.mjs` `.cjs`, `.py` `.pyi`, `.java` | folds over declarations, `Enter` follows an import |
+| Plain text | `.txt`, `.text`, and any extension naming no parser | the file's lines, verbatim |
 
-Anything unnamed — a pipe — is sniffed. `--format` forces the choice.
+Anything unnamed — a pipe — is sniffed. `--format` forces the choice among
+`md`, `csv`, `json`, `jsonl` and `text`; code is chosen by extension, since a
+file that does not lex cleanly falls back to plain source on its own.
 
 ## Build from source
 
@@ -563,7 +569,7 @@ every syscall is a hand-written `extern "C"` declaration.
 
 ```
 $ cargo tree
-tread v0.2.0
+tread v0.3.0
 ```
 
 All `unsafe` lives in the platform backends under [`src/sys/`](src/sys/); every
diff --git a/src/cli.rs b/src/cli.rs
index ba54b82..aa8dc46 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -78,7 +78,7 @@ impl fmt::Display for CliError {
 pub fn help_text() -> String {
     format!(
         "\
-{BIN} {VERSION} — a terminal reader for markdown, CSV and JSON
+{BIN} {VERSION} — a terminal reader for markdown, CSV, JSON and code
 
 USAGE
     {BIN} [OPTIONS] [FILE]