diff --git a/codegen/Cargo.toml b/codegen/Cargo.toml
index 073b56b..f3a6ac3 100644
--- a/codegen/Cargo.toml
+++ b/codegen/Cargo.toml
@@ -9,8 +9,8 @@ license = "GPL-3.0-only"
 # repository structure — no crates.io publishing at this stage). Pinned to the
 # same generation rev `comline-typescript` uses, so a CLI build has one
 # `comline-codegen`. Local iteration: add a `[patch]` onto a sibling checkout.
-comline-codegen = { git = "https://github.com/ComlineProject/generation", rev = "c70336dcc9485cea2c99b0f1db3789e420deaeda" }
-comline-core = { git = "https://github.com/ComlineProject/core", rev = "47ac5f10a36b587d14d1b9672fba65d8f3712962" }
+comline-codegen = { git = "https://github.com/ComlineProject/generation", rev = "d901db42d094ea9e2f59a310e6e885767abcae6b" }
+comline-core = { git = "https://github.com/ComlineProject/core", rev = "50c17cc740676416e945582dd6e2547e8535ac03" }
 
 eyre = "0.6.8"
 
diff --git a/codegen/src/generator.rs b/codegen/src/generator.rs
index 732cc40..646d265 100644
--- a/codegen/src/generator.rs
+++ b/codegen/src/generator.rs
@@ -11,6 +11,7 @@ use std::collections::HashMap;
 use std::path::PathBuf;
 
 use comline_core::schema::ir::compiler::interpreted::kind_search::KindValue;
+use comline_core::schema::ir::frozen::schema_ir_hash;
 use comline_core::schema::ir::frozen::unit::{FrozenArgument, FrozenUnit};
 
 use eyre::{bail, Result};
@@ -173,10 +174,10 @@ fn schema_source(units: &[FrozenUnit], default_framing: Option<&str>) -> String
 
     if has_protocol {
         output.push_str(&format!(
-            "/// Fingerprint of the frozen IR this file was generated from — the two\n\
-             /// ends of a connection [`Handshake`] must agree on it.\n\
+            "/// Canonical digest of the frozen IR this file was generated from — the\n\
+             /// two ends of a connection [`Handshake`] must agree on it.\n\
              pub const IR_HASH: u64 = {:#018x};\n\n",
-            ir_hash(units)
+            schema_ir_hash(units)
         ));
     }
 
@@ -212,20 +213,6 @@ fn schema_source(units: &[FrozenUnit], default_framing: Option<&str>) -> String
     output
 }
 
-/// A deterministic fingerprint of the schema's frozen units — FNV-1a over their
-/// `Debug` form. Stable for a given generator version; a generator bump changes
-/// it, which is correct (different codegen ⇒ a new handshake identity). A
-/// canonical cross-language hash from `core`'s CAS, threaded through
-/// `GenRequest`, is the eventual form.
-fn ir_hash(units: &[FrozenUnit]) -> u64 {
-    let mut h: u64 = 0xcbf2_9ce4_8422_2325;
-    for b in format!("{units:?}").as_bytes() {
-        h ^= u64::from(*b);
-        h = h.wrapping_mul(0x0000_0100_0000_01b3);
-    }
-    h
-}
-
 // ── data types ─────────────────────────────────────────────────────────────
 
 fn field_lines(fields: &[FrozenUnit]) -> String {