diff --git a/crates/aura-cli/src/graph_construct.rs b/crates/aura-cli/src/graph_construct.rs
index 09e35d9..c9e585d 100644
--- a/crates/aura-cli/src/graph_construct.rs
+++ b/crates/aura-cli/src/graph_construct.rs
@@ -370,8 +370,9 @@ fn resolve_blueprint_text(target: &str, env: &crate::project::Env) -> Result<Str
 fn params_lines(target: &str, env: &crate::project::Env) -> Result<String, String> {
     use std::fmt::Write as _;
     let text = resolve_blueprint_text(target, env)?;
-    let composite =
-        blueprint_from_json(&text, &|t| env.resolve(t)).map_err(|e| blueprint_load_prose(&e))?;
+    // Shape-discriminated like file-mode --content-id: an op-script (array)
+    // builds through the one-build tail, an envelope (object) loads (#202).
+    let composite = composite_from_any(&text, env)?;
     let mut out = String::new();
     for p in composite.param_space() {
         let _ = writeln!(out, "{}:{:?}", p.name, p.kind);
@@ -396,8 +397,9 @@ pub fn register_cmd(file: &Path, env: &crate::project::Env) {
 fn register_blueprint(file: &Path, env: &crate::project::Env) -> Result<String, String> {
     let text = std::fs::read_to_string(file)
         .map_err(|e| format!("cannot read {}: {e}", file.display()))?;
-    let composite =
-        blueprint_from_json(&text, &|t| env.resolve(t)).map_err(|e| blueprint_load_prose(&e))?;
+    // Shape-discriminated like file-mode --content-id (#202): either shape
+    // canonicalizes to the envelope form, so the stored id is shape-invariant.
+    let composite = composite_from_any(&text, env)?;
     let canonical = blueprint_to_json(&composite).map_err(|e| format!("serialize error: {e:?}"))?;
     let id = crate::content_id(&canonical);
     let registry = env.registry();
diff --git a/crates/aura-cli/tests/graph_construct.rs b/crates/aura-cli/tests/graph_construct.rs
index 4ecf189..001217a 100644
--- a/crates/aura-cli/tests/graph_construct.rs
+++ b/crates/aura-cli/tests/graph_construct.rs
@@ -605,3 +605,64 @@ fn graph_register_rejects_an_unknown_node_type_with_prose() {
         "names the unknown node type: {stderr}"
     );
 }
+
+/// Property (#202 headline, the on-ramp is shape-invariant): `aura graph register`
+/// accepts an op-script document (a JSON array) exactly as it accepts a #155
+/// blueprint envelope (a JSON object) — it shape-discriminates the array form,
+/// builds it through the same one-build tail, and stores it under the SAME content
+/// id it stores that op-script's `graph build` envelope under. The content id is
+/// shape-invariant (an op-script and its built envelope hash identically), so the
+/// two on-ramp shapes must agree on the store key; `register` must not reject the
+/// op-script with the raw serde `invalid type: map, expected u32` message the
+/// direct-`blueprint_from_json` path currently leaks.
+#[test]
+fn graph_register_accepts_an_op_script_and_stores_the_envelope_content_id() {
+    let dir = temp_cwd("register-op-script");
+    // The op-script form (a JSON array of ops), written to a file.
+    let op_script = dir.join("op-script.json");
+    std::fs::write(&op_script, SIGNAL_DOC).expect("write op-script fixture");
+    // Its `graph build` envelope (a JSON object), the shape `register` already accepts.
+    let (envelope_bytes, _e, built) = run(&["graph", "build"], SIGNAL_DOC);
+    assert!(built, "graph build produces the envelope");
+    let envelope = dir.join("envelope.json");
+    std::fs::write(&envelope, &envelope_bytes).expect("write envelope fixture");
+
+    // The envelope shape registers today (green sibling); the op-script must too.
+    let (env_out, env_err, env_code) =
+        run_in(&dir, &["graph", "register", envelope.to_str().unwrap()]);
+    assert_eq!(env_code, Some(0), "register envelope: {env_out} {env_err}");
+    let (op_out, op_err, op_code) =
+        run_in(&dir, &["graph", "register", op_script.to_str().unwrap()]);
+    assert_eq!(op_code, Some(0), "register op-script exits 0: {op_out} {op_err}");
+
+    assert_eq!(
+        registered_id(&op_out),
+        registered_id(&env_out),
+        "op-script and its built envelope register to the same content id"
+    );
+}
+
+/// Property (#202, the same on-ramp seam at the sibling verb): `aura graph
+/// introspect --params` accepts an op-script exactly as it accepts a blueprint
+/// envelope — the raw axis namespace it prints for the op-script equals the one it
+/// prints for that op-script's built envelope, both exit 0. Currently `--params`
+/// rejects the op-script with the same raw serde `invalid type: map, expected u32`
+/// message `register` does (both route through the direct `blueprint_from_json`).
+#[test]
+fn graph_params_accepts_an_op_script_matching_its_envelope() {
+    let dir = temp_cwd("params-op-script");
+    let op_script = dir.join("op-script.json");
+    std::fs::write(&op_script, SIGNAL_DOC).expect("write op-script fixture");
+    let (envelope_bytes, _e, built) = run(&["graph", "build"], SIGNAL_DOC);
+    assert!(built, "graph build produces the envelope");
+    let envelope = dir.join("envelope.json");
+    std::fs::write(&envelope, &envelope_bytes).expect("write envelope fixture");
+
+    let (env_out, env_err, env_code) =
+        run_in(&dir, &["graph", "introspect", "--params", envelope.to_str().unwrap()]);
+    assert_eq!(env_code, Some(0), "params on envelope: {env_out} {env_err}");
+    let (op_out, op_err, op_code) =
+        run_in(&dir, &["graph", "introspect", "--params", op_script.to_str().unwrap()]);
+    assert_eq!(op_code, Some(0), "params on op-script exits 0: {op_out} {op_err}");
+    assert_eq!(op_out, env_out, "op-script and envelope agree on the raw axis namespace");
+}