Update CHANGELOG for ion-build, fn literals, and doc comment work.

Covers commits since the fmt::int_to_string entry, including tooling, LSP docs, and the README/skills alignment pass.

Author: Cod-e-Codes

CHANGELOG.md

@@ -2,13 +2,14 @@
 
 ## 2026-06
 
-- **Language**: `for` iteration, `match` guards, `else if`, `break`/`continue`, `loop {}`, `+=`, hex/bin literals, function types `fn(T) -> R`, tuple literals and destructuring.
+- **Language**: `for` iteration, `match` guards, `else if`, `break`/`continue`, `loop {}`, `+=`, hex/bin literals, function types `fn(T) -> R`, tuple literals and destructuring. Capture-free fn literals (`fn(T) -> R` lowered to static C function pointers; `ClosureCapture` for outer bindings).
 - **Stdlib & runtime**: `fmt.ion`, `Result<T, E>`, `fs.read_to_string`, `String::push_byte`.
-- **Compiler**: scope-drop codegen, `pthread` spawn, slice bounds checks, array-to-slice coercion, struct/enum field drops, `String` equality, module function name mangling, lasting-borrow rules (ION_SPEC 5.3), field-path borrow exclusivity, move/copy tracking fixes, generic monomorphization, generated C file banner (source path, GNU C note, merged stdlib note, multi-file provenance, comment-safe path escaping).
-- **LSP**: diagnostics, hover, completion, go-to-definition; multi-error reporting; symbol table mirroring; diagnostics cleared on close; hover fixes for `let` bindings and module-qualified calls.
-- **Tooling**: GitHub Actions CI (Linux and Windows), pinned toolchain, `test_expectations.tsv` manifest, `--version`, line-numbered errors, Cursor agent skills. Split `tc` and `cgen` into submodules. Documented checked-in `examples/*.c` codegen snapshots in README and integration-test skill; regenerated example C output. Fixed `researching-pl-literature` skill `paper-seeds` reference formatting.
-- **Fixes**: match rvalue codegen, `Vec` struct drops, channel codegen, parser handling of `alias::call()`, scope-drop for moved-into-call bindings, HTTP server on Windows, integration harness on Windows. Integer indexing and `Vec<i32>` inference in the type checker. Match rvalue arms: reject diverging arms mixed with value arms; structural control-flow analysis for arm bodies (nested `if`/`else`, `loop` without `break`, `unsafe` blocks); reject mixed diverge and value-producing paths within one arm; cgen assigns through `if`/`else` value branches. `fmt::int_to_string` uses `String::push_byte` per digit instead of per-digit `push_str` branches.
-- **Examples**: `text_summary` (fixture file), `data_lib` (multi-module), `channel_worker` (flat single-file).
+- **Compiler**: scope-drop codegen, `pthread` spawn, slice bounds checks, array-to-slice coercion, struct/enum field drops, `String` equality, module function name mangling, lasting-borrow rules (ION_SPEC 5.3), field-path borrow exclusivity, move/copy tracking fixes, generic monomorphization, generated C file banner (repo-relative source labels via `portable_source_label`, GNU C note, merged stdlib note, multi-file provenance, comment-safe path escaping).
+- **LSP**: diagnostics, hover, completion, go-to-definition; multi-error reporting; symbol table mirroring; diagnostics cleared on close; hover fixes for `let` bindings and module-qualified calls. Contiguous `//` doc comments attached to declarations (including `pub` items) for hover.
+- **Tooling**: GitHub Actions CI (Linux and Windows), pinned toolchain (1.96.0), `test_expectations.tsv` manifest, `--version`, line-numbered errors, Cursor agent skills. Split `tc` and `cgen` into submodules. `ion-build` driver and `ion.toml` manifests (`single`/`multi`, `out_dir`, `cflags`, `ldflags`, `stdlib_paths`, `emit_in_source`); per-example manifests and `build_hello`/`build_bad_main` harness smoke tests. Shared `discover_import_config` and stdlib search paths for `ion-compiler`, `ion-build`, and LSP. Integration harness precompiles `runtime/ion_runtime.c` once per run (`RUNTIME_OBJ`). `writing-ion-code` agent skill; `creating-ion-skills` examples index lists all eight project skills. Documented checked-in `examples/*.c` codegen snapshots in README and integration-test skill; regenerated example C output. Fixed `researching-pl-literature` skill `paper-seeds` reference formatting.
+- **Docs**: README, CONTRIBUTING, ION_SPEC, and agent skills aligned on project layout, `ion-build` workflow, `emit_in_source`, stdlib import order, LSP features and limitations, `src/build/` checklists, and portable Git Bash paths for `test_runner.sh`.
+- **Fixes**: match rvalue codegen, `Vec` struct drops, channel codegen, parser handling of `alias::call()`, scope-drop for moved-into-call bindings, HTTP server on Windows, integration harness on Windows. Integer indexing and `Vec<i32>` inference in the type checker. Match rvalue arms: reject diverging arms mixed with value arms; structural control-flow analysis for arm bodies (nested `if`/`else`, `loop` without `break`, `unsafe` blocks); reject mixed diverge and value-producing paths within one arm; cgen assigns through `if`/`else` value branches. `fmt::int_to_string` uses `String::push_byte` per digit instead of per-digit `push_str` branches; integration test asserts `0`, negatives, and `INT_MIN`. Clippy fix in `portable_source_label`.
+- **Examples**: `text_summary` (fixture file), `data_lib` (multi-module), `channel_worker` (flat single-file). Per-example `*.toml` manifests for `ion-build`.
 - **Multi-file fixes**: merge private struct types for cross-module type checking; per-module C symbol prefixes in multi-file codegen (`io_print_int`); walk-up `runtime/` discovery for nested build directories. Integration tests `test_multi_struct`, `test_multi_fmt_io`. Example policy: single-file examples commit `.c` snapshots; `data_lib` multi-file keeps `.ion` only.
 
 ## 2025-12