Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@bindings/go/helm/blob/chart_blob.go`:
- Around line 54-57: ensureExtracted currently can panic on a nil receiver or a
nil source blob; add guards at the start of ChartBlob.ensureExtracted so it
fails closed: if the receiver is nil, immediately return a descriptive error; if
c.ReadOnlyBlob is nil, set c.err to a descriptive error and return it (so
subsequent callers see the failure) before invoking c.extract.Do; otherwise
proceed to call extractFromTar as before. Reference symbols:
ChartBlob.ensureExtracted, NewChartBlob, c.ReadOnlyBlob, extractFromTar, c.err,
and c.extract.Do.

In `@bindings/go/helm/repository/resource/resource_repository_test.go`:
- Around line 158-162: The subtest "returns error for invalid repository URL"
currently passes an empty helmChart to helmResource(t,
"https://localhost:0/nonexistent", ""), causing the earlier "chart name is
required" validation to trigger instead of exercising the repository
URL/transport error; update the call to helmResource (used by the
repo.DownloadResource test) to pass a non-empty chart name (e.g., "testchart" or
"mychart") so the test reaches the invalid-URL branch and asserts the transport
error from repo.DownloadResource.

In `@bindings/go/helm/repository/resource/resource_repository.go`:
- Around line 131-186: In tarDirectoryRecursive, the tar.Writer (tw) must be
explicitly closed before building the inmemory blob so the tar footer is flushed
and any close error is handled; replace the current deferred tw.Close() with an
explicit close call just after filepath.Walk finishes and before the return that
creates inmemory.New, check and propagate/log any error from tw.Close(), and
only then call inmemory.New(&buf, inmemory.WithMediaType("application/x-tar")).

In `@bindings/go/helm/transformation/get_helm_chart.go`:
- Around line 28-33: Update bindings/go/transfer/internal/builder.go to
initialize the GetHelmChart struct using the new ResourceRepository field
instead of the removed ResourceConsumerIdentityProvider: locate the GetHelmChart
construction (currently assigning to ResourceConsumerIdentityProvider) and
replace that assignment with ResourceRepository: resourceRepo, while keeping
Scheme and CredentialProvider assignments (use transformerScheme and
credentialProvider as before) so the struct fields match the GetHelmChart type.

---

Outside diff comments:
In `@bindings/go/helm/transformation/get_helm_chart.go`:
- Around line 59-67: The code only nil-checks t.ResourceRepository when
resolving credentials but later calls t.ResourceRepository.DownloadResource
unconditionally (risking a nil-pointer panic); update get_helm_chart.go to guard
t.ResourceRepository before any use — either return a clear error if
ResourceRepository is nil (e.g., "resource repository required") or move/remove
the earlier conditional so ResourceRepository is validated up-front;
specifically adjust the logic around t.ResourceRepository,
GetResourceCredentialConsumerIdentity, Resolve and DownloadResource so
DownloadResource is only invoked when t.ResourceRepository != nil (or ensure
ResourceRepository is required and checked at function start).

---

Nitpick comments:
In `@bindings/go/helm/blob/chart_blob_test.go`:
- Around line 160-177: The test TestChartBlob_ExtractionIsLazy only compares
returned bytes so it won't detect repeated reads; replace the raw tarBlob with a
small spy/wrapper around the io.ReadCloser produced by createTarBlobFromTestdata
that counts calls to Read/Close (or ReadCloser() if that's the method on the
underlying blob) and expose that counter; then call cb.ChartArchive() (and
cb.ProvFile() if relevant) multiple times and assert the spy's read count equals
1 to verify the extraction is performed only once; reference the ChartBlob type
and its methods ChartArchive and ProvFile and wrap the tarBlob used to construct
helmblob.NewChartBlob with the spy wrapper to track reads.

In `@bindings/go/helm/repository/resource/resource_repository.go`:
- Around line 26-33: The struct comment for ResourceRepository is incomplete:
update the doc comment to state that ResourceRepository implements both
repository.ResourceRepository and BuiltinResourceRepository (which includes
GetResourceRepositoryScheme), so editors can see it satisfies the plugin
registry contract; adjust the top-of-file comment that currently references only
repository.ResourceRepository to include BuiltinResourceRepository and mention
GetResourceRepositoryScheme as the defining method.

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@bindings/go/helm/repository/resource/doc.go`:
- Around line 32-36: The comment incorrectly states that the Helm repository is
registered in the CLI; update the doc text to present the registration snippet
as an example or optional follow-up step rather than asserting current behavior.
Edit the block that references
manager.ResourcePluginRegistry.RegisterInternalResourcePlugin and
resource.NewResourceRepository to say something like "For example, you can
register the repository in the CLI with:" or "As a follow-up you may register
the repository:" so it no longer claims it is already wired by default.

In `@bindings/go/helm/transformation/get_helm_chart.go`:
- Around line 30-32: The code calls t.ResourceRepository.DownloadResource(...)
(and other uses of t.ResourceRepository around the GetHelmChart flow) without
checking for nil, causing a panic when the repository isn't wired; update the
code in the GetHelmChart logic to validate t.ResourceRepository at the start (or
before each use) and return a regular error (not a panic) if it's nil, e.g.,
return fmt.Errorf("missing ResourceRepository: ...") so callers receive a
configuration error instead of a nil-pointer panic; apply the same
nil-check/early-error pattern to all sites where t.ResourceRepository is used
(references around lines where DownloadResource is invoked).

---

Nitpick comments:
In `@bindings/go/helm/blob/chart_blob.go`:
- Around line 87-100: The loop that processes tar headers currently overwrites
chartBlob when multiple entries match ".tgz"; add a guard so when you encounter
a ".tgz" and chartBlob is already non-nil you surface the problem instead of
silently using the last one — e.g., detect chartBlob != nil inside the case for
strings.HasSuffix(header.Name, ".tgz") and either return an explicit error
(preferred) like "multiple .tgz entries in chart tar" or emit a clear warning
via the package logger; update the containing function's error handling/return
signature accordingly and ensure callers handle the new error path (refer to
symbols chartBlob, header.Name, and the switch/case block around inmemory.New).

In `@bindings/go/helm/repository/resource/resource_repository.go`:
- Around line 141-149: The callback that opens files using root.Open(path)
currently defers f.Close(), keeping descriptors open for the whole walk; change
it to close each file immediately after use by removing the defer and calling
f.Close() right after the io.Copy(tw, f) call (handle and return any Close error
appropriately, e.g., wrap it with fmt.Errorf), so the sequence in the callback
is: open file via root.Open(path), io.Copy to tw, call f.Close(), and propagate
any errors from Copy or Close; update error messages to reference path and use
the same wrapping style used elsewhere in this file.

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@bindings/go/helm/transformation/get_helm_chart.go`:
- Line 62: The conditional `if t.CredentialProvider != nil &&
t.ResourceRepository != nil` contains a redundant `t.ResourceRepository != nil`
check because earlier in the function `t.ResourceRepository` is already
validated and an error returned if nil; simplify the condition to only check
`t.CredentialProvider != nil` (e.g., replace the combined conditional with `if
t.CredentialProvider != nil`) so the branch logic remains the same but the
redundant nil check is removed; ensure you update any nearby comments or logic
that assumed the combined check to avoid changing behavior.