### 🚀 Features

- 66c9b01 transformer/typescript: Debug_assert that `enum_eval` ran in
semantic (#22252) (Dunqing)
- ffe6475 minifier: Fold `Array` constructor with safe spreads (#22215)
(camc314)

### 🐛 Bug Fixes

- d3d0b18 traverse: Handle `ChainElement::TSNonNullExpression` in
`GatherNodeParts` (#22247) (leaysgur)
- 4e880de transformer/object-rest-spread: Declare temp vars for computed
keys (#22284) (camc314)
- a7c3e22 semantic: Clear member write target for computed keys (#22302)
(camc314)
- 6a8852d codegen: Emit newline after legal-comment orphan flush
(#22304) (Dunqing)
- 5da9fda transformer/explicit-resource-management: Preserve class names
(#22306) (Dunqing)
- b5d970f transformer/explicit-resource-management: Preserve class names
(#22290) (camc314)
- bc54fd4 minifier: Keep function / class names if direct eval is
present in the scope (#22241) (sapphi-red)
- 7a810c0 minifier: Refresh direct eval flags after DCE (#21787)
(Dunqing)
- dd88726 transformer/legacy-decorator: Preserve accessor type
annotation for emitDecoratorMetadata (#21966) (Dunqing)
- 29a3cd7 codegen: Swap mapping/indent order for top-level decls
(#22206) (Dunqing)
- 73b4f40 minifier: Preserve catch binding with direct eval (#22221)
(camc314)
- 0e13d17 minifier: Preserve optional chain base side effects (#22219)
(camc314)
- 0c7c01c transformer/typescript: Inline optional-chain enum member
access (#21834) (Dunqing)
- a6aff7e codegen: Emit block/array/object end mapping at close char
(#22200) (Dunqing)
- a099b03 codegen: Emit call end mapping at `)` position, not past it
(#22199) (Dunqing)
- 5753774 minifier: Cap if-return ternary collapse for firefox (#21841)
(Gurupungav Narayanan)
- 2493bdd codegen: Correct sourcemap end mappings for closing delimiters
(#22001) (Mark Dalgleish)
- 3b385e2 minifier: Bail optimizing `Array` with unknown arg count
(#22188) (camc314)
- 9fa2122 parser: Parse array computed class keys (#22159) (camc314)

### 📚 Documentation

- a4a6892 napi/parser: Correct code comment (#22278) (overlookmotel)
- 9305373 oxc: Update README (#22178) (camc314)

Co-authored-by: Cameron <[email protected]>

We already implemented single file optional chaining inline in Oxc
oxc-project/oxc#21834

## Summary

Teaches the cross-module enum inliner to fold optional-chain access
(`E?.x`, `E?.['x']`) to the same literal as `E.x` / `E['x']`. With that
hole filled, the tree-shaker bypass added in #9229 no longer needs its
`!prop.optional` guard.

## Why this is safe

Enum bindings are always defined — the generated IIFE initializes them
to `{}` (never null/undefined), and const enums are removed entirely
after inlining. So `?.` cannot short-circuit on an enum object: `E?.x`
is observationally equivalent to `E.x`.

The TDZ assumption this relies on (an enum identifier reaching the
finalizer is always bound to a real value) is the same one `E.x`
inlining already makes — we just extend it to the optional form.

## What changed

- `crates/rolldown/src/module_finalizers/mod.rs` —
`try_inline_enum_access` now also matches `ChainExpression {
StaticMemberExpression | ComputedMemberExpression }`.
- `crates/rolldown/src/module_finalizers/impl_visit_mut.rs` — pre-match
inline attempt for `ChainExpression`, done before the main
`visit_expression` dispatch so `expr` can be passed to
`try_inline_enum_access` without conflicting with the existing arm's
mutable destructure of the inner chain.
-
`crates/rolldown/src/stages/link_stage/tree_shaking/include_statements.rs`
— drops the `!prop.optional` guard from the enum-decl bypass.
`!is_write` stays.
-
`crates/rolldown/tests/esbuild/ts/ts_enum_cross_module_inlining_access/`
— moves the optional cases into the `inlined` group; snapshot now folds
all 8 inlinable accesses to literals while keeping `e_num`/`e_str` (bare
identifier references).

## Test plan

- [x] `cargo test -p rolldown --test integration
ts_enum_cross_module_inlining_access`
- [x] `cargo test -p rolldown` (1703 passed, 0 failed)
- [x] `cargo test -p rolldown --test integration enum` (24 passed)
- [x] `cargo test -p rolldown --test integration chain` (25 passed)
- [x] Spot-checked single-module `enum E { x = 1 }; console.log(E?.x)`
via CLI — now folds to `console.log(1)`
- [x] `just ued` — produced no additional snap-diff changes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 <[email protected]>

We already implemented single file optional chaining inline in Oxc
oxc-project/oxc#21834

## Summary

Teaches the cross-module enum inliner to fold optional-chain access
(`E?.x`, `E?.['x']`) to the same literal as `E.x` / `E['x']`. With that
hole filled, the tree-shaker bypass added in #9229 no longer needs its
`!prop.optional` guard.

## Why this is safe

Enum bindings are always defined — the generated IIFE initializes them
to `{}` (never null/undefined), and const enums are removed entirely
after inlining. So `?.` cannot short-circuit on an enum object: `E?.x`
is observationally equivalent to `E.x`.

The TDZ assumption this relies on (an enum identifier reaching the
finalizer is always bound to a real value) is the same one `E.x`
inlining already makes — we just extend it to the optional form.

## What changed

- `crates/rolldown/src/module_finalizers/mod.rs` —
`try_inline_enum_access` now also matches `ChainExpression {
StaticMemberExpression | ComputedMemberExpression }`.
- `crates/rolldown/src/module_finalizers/impl_visit_mut.rs` — pre-match
inline attempt for `ChainExpression`, done before the main
`visit_expression` dispatch so `expr` can be passed to
`try_inline_enum_access` without conflicting with the existing arm's
mutable destructure of the inner chain.
-
`crates/rolldown/src/stages/link_stage/tree_shaking/include_statements.rs`
— drops the `!prop.optional` guard from the enum-decl bypass.
`!is_write` stays.
-
`crates/rolldown/tests/esbuild/ts/ts_enum_cross_module_inlining_access/`
— moves the optional cases into the `inlined` group; snapshot now folds
all 8 inlinable accesses to literals while keeping `e_num`/`e_str` (bare
identifier references).

## Test plan

- [x] `cargo test -p rolldown --test integration
ts_enum_cross_module_inlining_access`
- [x] `cargo test -p rolldown` (1703 passed, 0 failed)
- [x] `cargo test -p rolldown --test integration enum` (24 passed)
- [x] `cargo test -p rolldown --test integration chain` (25 passed)
- [x] Spot-checked single-module `enum E { x = 1 }; console.log(E?.x)`
via CLI — now folds to `console.log(1)`
- [x] `just ued` — produced no additional snap-diff changes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 <[email protected]>