generator.go (6 call sites):

• getMethodHTTPConfig(method) -> annotations.GetMethodHTTPConfig(method) (lines ~790, ~810, ~819)
  • Where config.Method is used: no change needed (shared package returns uppercase, httpgen already uses uppercase)
  • Where config.PathParams is used: no change needed (same type)
• getServiceHTTPConfig(service) -> calls need adjustment: replace getServiceHTTPConfig(service) with annotations.GetServiceBasePath(service) and use the returned string directly instead of serviceConfig.BasePath. Look at line ~801 where config := getServiceHTTPConfig(service) is called and config.BasePath is accessed -- replace with basePath := annotations.GetServiceBasePath(service).
• getServiceHeaders(service) -> annotations.GetServiceHeaders(service) (line ~1417)
• getMethodHeaders(method) -> annotations.GetMethodHeaders(method) (line ~1436)
• getQueryParams(method.Input) -> annotations.GetQueryParams(method.Input) (line ~1482)
  • IMPORTANT: httpgen's QueryParam only has FieldName, FieldGoName, ParamName, Required. The shared QueryParam has additional fields (FieldJSONName, FieldKind, Field). httpgen code accesses only the fields it needs, so this works without any extra changes. But verify every access pattern: .FieldName, .FieldGoName, .ParamName, .Required -- all still valid.
• getFieldExamples(field) -> annotations.GetFieldExamples(field) (in mock_generator.go line ~69)
• lowerFirst(...) -> annotations.LowerFirst(...) (line ~827 area -- but lowerFirst is also used extensively in generator.go for non-annotation purposes. Replace ALL occurrences.)
• Remove parseExistingAnnotation call at line ~796 and replace with empty string or adjust the helper function that calls it. This is dead code (always returns "").

Also in generator.go: Remove the lowerFirst function definition (lines 827-832) and the parseExistingAnnotation usage. The function getPath at ~793 calls parseExistingAnnotation -- this always returns empty string, so just replace the body to return empty string directly, or remove the entire getPath function if it's only used in one place and inline the empty-string logic. Check all callers.

unwrap.go (5 call sites):

• getUnwrapField(msg) -> annotations.GetUnwrapField(msg) (lines ~90, ~136, ~178, ~252)
• Type references: *UnwrapFieldInfo -> *annotations.UnwrapFieldInfo
• &UnwrapValidationError{...} -- this type is defined in annotations.go but the struct literal creation in unwrap.go should reference annotations.UnwrapValidationError if needed. Check if unwrap.go creates any UnwrapValidationError directly or only receives them from getUnwrapField. (It only receives them -- getUnwrapField returns them.)
• UnwrapContext struct references *UnwrapFieldInfo in its fields -- update to *annotations.UnwrapFieldInfo.
• GlobalUnwrapInfo struct's UnwrapFields map type: map[string]*UnwrapFieldInfo -> map[string]*annotations.UnwrapFieldInfo

validation.go (2 call sites):

• getMethodHTTPConfig(method) -> annotations.GetMethodHTTPConfig(method) (line ~22)
• getQueryParams(method.Input) -> annotations.GetQueryParams(method.Input) (line ~64)
• The getBodyFields function takes []QueryParam -- update to []annotations.QueryParam
• The ValidationError struct stays local (it's httpgen-specific, not annotation-related)

mock_generator.go (1 call site):

• getFieldExamples(field) -> annotations.GetFieldExamples(field) (line ~69)

After ALL replacements, remove the HTTP method constants (httpMethodGET, etc.) from generator.go if they exist there (they're in annotations.go which will be deleted).

Run go build ./internal/httpgen/ after changes to verify compilation. Then run make lint-fix. go build ./internal/httpgen/ compiles successfully. go build ./cmd/protoc-gen-go-http/ compiles successfully. make lint-fix produces no errors. All httpgen files import and use annotations package. No local annotation parsing functions remain in generator.go, unwrap.go, validation.go, or mock_generator.go.