In `@lib/config.js`:
- Around line 300-305: In makeImmutable(object, property, value) ensure the
assignment object = this.#config has a terminating semicolon; locate the
makeImmutable method in lib/config.js and add the missing semicolon after the
assignment to follow proper syntax and avoid potential parsing errors.
- Around line 397-400: The inline comment above the Object.preventExtensions
call concatenates two issue URLs; update the comment at the block that checks
"if (!partial)" (the comment immediately before
Object.preventExtensions(object)) to separate the two links with a space or
newline so they are distinct (e.g., add a space or place each URL on its own
line) ensuring the comment reads "...issue/505 // https://.../865" or uses two
separate lines for the two URLs.

In `@lib/util.js`:
- Around line 800-809: The clone() method on Load currently creates newEnv and a
copy via new Load(this.options, newEnv) but then calls Util.extendDeep(copy,
this), which will overwrite copy.env with the original instance's env; change
the cloning flow to preserve the freshly created env by excluding or skipping
the env property when deep-extending—e.g., remove or ignore this.env from the
source object passed to Util.extendDeep or perform the deep-extend only for
other properties (use a shallow delete/omit of env from this or build a temp
source without env), ensuring copy.env remains newEnv; update references to
Load.clone and Util.extendDeep accordingly.

In `@test/2-config-test.js`:
- Around line 470-472: The variable `sources` is assigned from
config.util.getConfigSources() but never used; either remove the unused
declaration or use it in the subsequent assertion to avoid a redundant call.
Update the snippet that calls config.util.getConfigSources() again to reference
`sources` (e.g., use `sources[0].name` in the first assertion) or simply delete
the `let sources = ...` line if you prefer the existing inline calls; adjust
related assertions on `newConfig` only as needed.

In `@lib/config.js`:
- Around line 339-343: The loop in value.forEach is missing a terminating
semicolon after the call to this.makeImmutable(item), which can cause lint/parse
errors; update the forEach callback in the block that contains
Util.isObject(item) || Array.isArray(item) so the statement reads with a
semicolon after this.makeImmutable(item) to properly terminate the expression.
- Around line 568-576: The code currently uses filename.match(env) which does
substring matching and creates false positives; change both checks (the NODE_ENV
loop using load.options.nodeEnv and the NODE_APP_INSTANCE check) to match using
a word-boundary-safe RegExp built from the env value (e.g., new RegExp('\\b' +
escapeRegExp(env) + '\\b')) and add an escapeRegExp helper to properly escape
special regex chars before constructing the RegExp; update the calls that
reference filename.match(env) to use this RegExp form and ensure you apply the
same change for the NODE_APP_INSTANCE validation that references
load.getEnv("nodeAppInstance") (or the corresponding variable) so only exact,
delimited environment names match.

In `@test/0-util.js`:
- Around line 1554-1585: The final describe block for "Load.clone()" is missing
a terminating semicolon after the closing parenthesis/brace; add the semicolon
immediately after the closing ) of the describe('Load.clone()', ...) block to
fix the syntax (locate the describe block that contains tests checking
Load.clone(), scan(), clone(), getSources() and append the missing semicolon).

In `@lib/config.js`:
- Around line 236-243: The runtime ReferenceError is caused by using an
undefined identifier `Config` inside withModuleDefaults; replace that usage with
the actual class name `ConfigClass` so the copy is constructed from the runtime
class (i.e. change new Config(...) to new ConfigClass(...)), keeping the rest of
the logic intact (references: withModuleDefaults, LOAD_SYMBOL, this.#config,
copy.util.setModuleDefaults).
- Around line 203-235: Update the JSDoc example for withModuleDefaults to show
that it returns a new Config instance: replace the setModuleDefaults example
that calls CONFIG.util.setModuleDefaults(...) and accesses CONFIG.MyModule with
an example that assigns the returned Config (e.g., const newConfig =
CONFIG.util.withModuleDefaults("MyModule", {...})) and then demonstrates reading
properties from that newConfig, and update the text to state that
withModuleDefaults returns a new Config instance so callers know to use the
returned object; refer to the withModuleDefaults function and the Config type in
the description.

In `@test/2-config-test.js`:
- Around line 431-552: The tests fail because withModuleDefaults references an
undefined symbol "Config" instead of the actual class "ConfigClass"; update the
code in the util.withModuleDefaults implementation (where it constructs the new
config object) to use ConfigClass (or the correct exported class name used
elsewhere in the file) when creating the new instance and when checking
instanceof, ensuring all occurrences of "Config" are replaced with "ConfigClass"
(or the module's exported constructor) so withModuleDefaults no longer throws
ReferenceError.