chore(release): prepare public source release

crates/csvshape/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "csvshape"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+authors.workspace = true
+readme.workspace = true
+publish.workspace = true
+description = "Summarize large CSV and TSV files with bounded, AI-friendly output."
+keywords.workspace = true
+categories.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+common = { path = "../common", default-features = false }
+csv.workspace = true
+lexopt.workspace = true
+serde.workspace = true
+
+[dev-dependencies]
+assert_cmd.workspace = true
+predicates.workspace = true
+tempfile.workspace = true

crates/csvshape/src/main.rs

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+//! Binary entry point for `csvshape`.
+
+fn main() {
+    std::process::exit(csvshape::main_entry());
+}

crates/csvshape/tests/csvshape_cli.rs

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+//! Integration tests for the `csvshape` command.
+
+use std::fs;
+
+use assert_cmd::Command;
+use predicates::prelude::*;
+use tempfile::tempdir;
+
+fn cargo_command() -> Command {
+    Command::cargo_bin("csvshape").expect("binary")
+}
+
+#[test]
+fn summarizes_csv_as_json() {
+    let temp = tempdir().expect("tempdir");
+    let path = temp.path().join("sample.csv");
+    fs::write(
+        &path,
+        "name,age,city\nAda,34,London\nBob,,Paris\nCara,29,Paris\n",
+    )
+    .expect("fixture");
+
+    cargo_command()
+        .arg("--json")
+        .arg(&path)
+        .assert()
+        .success()
+        .stdout(predicate::str::contains("\"row_count\":3"))
+        .stdout(predicate::str::contains("\"column_count\":3"))
+        .stdout(predicate::str::contains("\"name\":\"age\""));
+}
+
+#[test]
+fn help_includes_csv_examples() {
+    cargo_command()
+        .arg("--help")
+        .assert()
+        .success()
+        .stdout(predicate::str::contains(
+            "csvshape [OPTIONS] diff <BEFORE> <AFTER>",
+        ))
+        .stdout(predicate::str::contains("--sample-rows"))
+        .stdout(predicate::str::contains("ConvertFrom-Json"))
+        .stdout(predicate::str::contains("csvshape"));
+}