Granted Patent B1

US 12,619,398 · App. 19/333,888 · Granted May 5, 2026

Inventors: Senthilkumar Ramakrishnan (New York, NY); Leigh-Ann Russell (New York, NY); Michael Keslar (New York, NY); Karthikeyan Nallathambi (New York, NY)

Assignee: THE BANK OF NEW YORK MELLON

G06F8/311G06F8/42

Abstract

Claims (56)

1 . A computer-implemented method for generating segment code for a legacy mainframe-source artifact, the method comprising:

receiving, from a compiler, a compiler-analysis artifact (CAA) generated by compiling a mainframe-source artifact (MSA);

generating, from the CAA, an abstract-syntax-tree (CAA-AST);

identifying, based on the CAA-AST, a plurality of logical segments of the MSA;

for each logical segment:

determining a segment descriptor comprising a segment identifier and a segment label;

generating a segment-code prompt based on the segment descriptor; and

generating, by applying the segment-code prompt to a large-language model (LLM), segment code; and

integrating the segment code of the plurality of logical segments to form integrated project code for the MSA.

2 . The method of claim 1 , wherein the CAA comprises a SYSADATA file emitted by a mainframe COBOL compiler.

3 . The method of claim 1 , wherein the segment-code prompt is generated using a prompt template selected from a template library based on the segment label and a target programming language.

4 . The method of claim 1 , wherein the segment code comprises one or more Java classes that implement business logic extracted from the corresponding logical segment.

5 . The method of claim 1 , wherein integrating the segment code further comprises deduplicating overlapping artifacts based on segment identifiers and emitting a consolidated project structure.

6 . The method of claim 1 , further comprising generating segment documentation for the plurality of logical segments by:

generating a segment-documentation prompt for each logical segment;

applying the segment-documentation prompt to a second LLM to generate segment documentation; and

integrating the segment documentation into integrated project documentation for the MSA.

7 . The method of claim 1 , wherein the segment code is generated by a code-generation engine implemented as a software agent.

8 . A system comprising:

a processor; and

non-transitory computer-readable storage medium comprising program instructions stored thereon that are executable by the processor to cause the following operations for generating segment code for a legacy mainframe-source artifact:

receiving, from a compiler, a compiler-analysis artifact (CAA) generated by compiling a mainframe-source artifact (MSA);

generating, from the CAA, an abstract-syntax-tree (CAA-AST);

identifying, based on the CAA-AST, a plurality of logical segments of the MSA;

for each logical segment:

determining a segment descriptor comprising a segment identifier and a segment label;

generating a segment-code prompt based on the segment descriptor; and

generating, by applying the segment-code prompt to a large-language model (LLM), segment code; and

integrating the segment code of the plurality of logical segments to form integrated project code for the MSA.

9 . The system of claim 8 , wherein the CAA comprises a SYSADATA file emitted by a mainframe COBOL compiler.

10 . The system of claim 8 , wherein the segment-code prompt is generated using a prompt template selected from a template library based on the segment label and a target programming language.

11 . The system of claim 8 , wherein the segment code comprises one or more Java classes that implement business logic extracted from the corresponding logical segment.

12 . The system of claim 8 , wherein integrating the segment code further comprises deduplicating overlapping artifacts based on segment identifiers and emitting a consolidated project structure.

13 . The system of claim 8 , the operations further comprising generating segment documentation for the plurality of logical segments by:

generating a segment-documentation prompt for each logical segment;

applying the segment-documentation prompt to a second LLM to generate segment documentation; and

integrating the segment documentation into integrated project documentation for the MSA.

14 . The system of claim 8 , wherein the segment code is generated by a code-generation engine implemented as a software agent.

15 . Non-transitory computer-readable storage medium comprising program instructions stored thereon that are executable by a processor to cause the following operations for generating segment code for a legacy mainframe-source artifact:

receiving, from a compiler, a compiler-analysis artifact (CAA) generated by compiling a mainframe-source artifact (MSA);

generating, from the CAA, an abstract-syntax-tree (CAA-AST);

identifying, based on the CAA-AST, a plurality of logical segments of the MSA;

for each logical segment:

determining a segment descriptor comprising a segment identifier and a segment label;

generating a segment-code prompt based on the segment descriptor; and

generating, by applying the segment-code prompt to a large-language model (LLM), segment code; and

integrating the segment code of the plurality of logical segments to form integrated project code for the MSA.

16 . The medium of claim 15 , wherein the CAA comprises a SYSADATA file emitted by a mainframe COBOL compiler.

17 . The medium of claim 15 , wherein the segment-code prompt is generated using a prompt template selected from a template library based on the segment label and a target programming language.

18 . The medium of claim 15 , wherein the segment code comprises one or more Java classes that implement business logic extracted from the corresponding logical segment.

19 . The medium of claim 15 , wherein integrating the segment code further comprises deduplicating overlapping artifacts based on segment identifiers and emitting a consolidated project structure.

20 . The medium of claim 15 , the operations further comprising generating segment documentation for the plurality of logical segments by:

generating a segment-documentation prompt for each logical segment;

applying the segment-documentation prompt to a second LLM to generate segment documentation; and

integrating the segment documentation into integrated project documentation for the MSA.

21 . The medium of claim 15 , wherein the segment code is generated by a code-generation engine implemented as a software agent.

Assignments (1)

Continuity (1)

References Cited (28)