fix!: rename `Groupped` to `Grouped` across the codebase

1 files changed, 12 insertions, 1 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c70d3d..d45e4b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -206,7 +206,7 @@ None
 
     The generated `proc` function now wraps the body result in `<UserReturnType as Into<ChainProcess<ThisProgram>>>::into(...)`, which:
     - Works for `Next` / `ChainProcess` via the identity `From<T> for T` implementation.
-    - Works for any pack type (`ResultGreeting`, etc.) via the `.into()` conversion generated by `pack!` / `#[derive(Groupped)]`.
+    - Works for any pack type (`ResultGreeting`, etc.) via the `.into()` conversion generated by `pack!` / `#[derive(Grouped)]`.
     - Works for `()` via the `From<()>` implementation on `ChainProcess`.
 
     The return type validation has been removed entirely — any valid Rust return type is accepted. If the type does not implement `Into<ChainProcess<ThisProgram>>`, a standard Rust compilation error will be produced at the call site.
@@ -263,6 +263,17 @@ None
 
 3. **[`core`]** **[`ExitCodeSetup`]** Updated `ExitCodeSetup` to only override the exit code when `ResExitCode` has been modified (i.e., `exit_code != 0`). Previously, it unconditionally overrode the exit code, which could interfere with exit codes set by other hooks or the program's default exit flow. The `on_finish` hook now returns `ProgramControlUnit::OverrideExitCode(...)` only when the exit code is non-zero, and `ProgramControls::Empty` otherwise. The import of `ProgramControls` has been added accordingly.
 
+4. **[`core`]** **[`macros`]** Renamed `Groupped` (typo) to `Grouped`. All references to the trait, derive macro, module files, and related types have been corrected throughout the codebase:
+
+    - Trait: `Groupped<Group>` → `Grouped<Group>`
+    - Derive macro: `#[derive(Groupped)]` → `#[derive(Grouped)]`
+    - Serialize variant: `GrouppedSerialize` → `GroupedSerialize`
+    - Source files: `groupped.rs` → `grouped.rs`
+    - Pattern matcher: `GrouppedDerivePattern` → `GroupedDerivePattern`
+    - All `use` imports, type annotations, and trait bound references updated accordingly.
+
+    This is a pure rename — no behavioral changes. All functionality remains identical. Downstream code using the old `Groupped` name must migrate to `Grouped`.
+
 ---
 
 ## Release 0.2.2 (2026-07-10)