diff --git a/build.zig.zon b/build.zig.zon
index 378e6f2..2b496b7 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -1,6 +1,6 @@
 .{
     .name = .cbor,
-    .version = "1.0.0",
+    .version = "1.1.0",
     .fingerprint = 0x1feaffc7fc04c445,
     .minimum_zig_version = "0.15.2",
 
diff --git a/release_notes.md b/release_notes.md
new file mode 100644
index 0000000..f991b08
--- /dev/null
+++ b/release_notes.md
@@ -0,0 +1,74 @@
+# Release Notes — v1.1.0
+2026-03-12
+
+## Features
+
+- **Custom encoder hooks**: Types can implement `cborEncode(writer: *Io.Writer) !void`
+  to control their own serialisation.
+- **Custom extractor hooks**: Types can implement `cborExtract(iter: *[]const u8) !bool`
+  to control their own deserialisation. Enum types are
+  now also supported via `cborExtract`.
+- **`extractAlloc`**: New allocating extractor for types containing slices
+  or heap-allocated payloads. Use `extractAlloc(&dest, allocator)` inside a
+  `match` pattern.
+- **`extractAlloc` arrays**: `extractAlloc` now handles `[]T` slices,
+  allocating and populating each element.
+- **Struct and union extraction**: `extract` and `extractAlloc` now handle
+  structs (decoded from CBOR maps) and tagged unions (decoded from
+  two-element CBOR arrays of `[tag, payload]`). Enum extraction is also
+  supported.
+- **`fmtBuf`**: New `fmtBuf(buf, value) ![]const u8` — like `fmt` but
+  returns `error.NoSpaceLeft` instead of panicking on overflow.
+- **`fmt` explicit panic**: `fmt` now calls `@panic("cbor.fmt: buffer too small")`
+  on overflow rather than `catch unreachable`.
+- **Non-u8 slice matching**: `match` now supports patterns of the form
+  `&[_]T{...}` for slices and arrays where the element type is not `u8`.
+- **`writeJsonValue` arrays and objects**: `writeJsonValue` now handles
+  `json.Value.array` and `json.Value.object`.
+- **More explicit error handling**: Errors that were previously collapsed
+  are now surfaced with distinct error values.
+
+## Bug Fixes
+
+- **`matchArray` non-match**: `matchArray` was incorrectly returning an
+  error on a type mismatch instead of `false`.
+- **`decodeMapHeader` error type**: Corrected the error return type to
+  include all possible errors.
+- **Missing `NotAnObject` error**: Added missing error variant to the error
+  set.
+- **`extract` optional null**: Extracting a null CBOR value into a
+  non-allocating optional now correctly sets the destination to `null`.
+- **`extractAlloc` optional null**: Same fix for the allocating extractor
+  path.
+- **`extractAlloc` `json.Value` arrays/objects**: Fell through to
+  union-match logic and failed. Now handled via `matchJsonValue` with the
+  real allocator.
+- **`decodeNInt` overflow**: Decoding large negative integers (magnitude >
+  `maxInt(i64)`) would panic. Now returns `error.IntegerTooSmall`.
+- **`skipValue` truncated floats**: Calling `skipValue` on a truncated
+  float16/32/64 would panic. Now returns `error.TooShort`.
+- **`matchJsonValue` floats**: Float values were silently dropped during
+  CBOR→`json.Value` extraction. All three widths now decoded correctly.
+- **`writeValue` large unsigned integers**: Unsigned integers wider than
+  `i64` were encoded incorrectly due to signed overflow.
+- **`matchStructScalar` / `matchStructAlloc`**: A short read returned
+  `false` instead of propagating `error.TooShort`, masking corruption as a
+  non-match.
+
+## Performance
+
+- **`writeTypedVal`**: Single `writer.write` call instead of multiple
+  single-byte writes.
+- **Float encoding**: `writeF16`/`writeF32`/`writeF64` each issue a single
+  write using `std.mem.writeInt` (also fixes a latent big-endian bug in the
+  previous manual byte-swap code).
+- **`decodeUIntLength`**: Replaced recursive implementation with an
+  iterative one.
+- **`fromJson` / `fromJsonAlloc`**: A single allocator is now threaded
+  through the entire JSON parse instead of creating a new arena per nested
+  container.
+
+## Build
+
+- Minimum Zig version is now **0.15.2**.
+- Updated APIs for Zig 0.15 compatibility.