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COBOL language grammar, division and section structure, PIC clause syntax, level numbers, procedure division verbs, and language construct reference. Use when parsing, analysing, or explaining COBOL source code structure.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Modernization analysis heuristics, complexity scoring rubrics, migration wave planning guidance, and interpretation of COBOL knowledge graph metrics. Use when graph-query, complexity-scorer, or migration-advisor needs to interpret results or make recommendations.
COBOL anti-patterns, modernization signals, and risk patterns to identify during parsing and analysis. Use when evaluating COBOL code quality, flagging migration risks, or assessing programs for Java conversion feasibility.
Proven Cypher query and write patterns for the LegacyCobolInsights graph. Includes MERGE templates for ingestion, common traversal queries for analysis, and aggregation patterns for reporting. Use when writing to or querying Neo4j.
Ripple effect analysis patterns for COBOL change impact. Covers how changes propagate through CALLS, INCLUDES, and shared data relationships. Use when impact-analyzer agent is performing blast radius assessment.
Mappings from COBOL constructs to Java equivalents. Covers data type mappings, control flow mappings, file I/O patterns, and Spring Boot architecture recommendations. Use when migration-advisor is producing Java blueprints for COBOL programs.
LegacyCobolInsights Neo4j knowledge graph schema. Node labels, properties, relationship types, and constraints for the COBOL modernization graph database. Use when reading from or writing to the Neo4j graph in this project.
| name | cobol-syntax |
| description | COBOL language grammar, division and section structure, PIC clause syntax, level numbers, procedure division verbs, and language construct reference. Use when parsing, analysing, or explaining COBOL source code structure. |
COBOL programs are divided into four mandatory divisions in fixed order. See DIVISIONS.md for detailed coverage. Key summary below.
IDENTIFICATION DIVISION — Program metadata
ENVIRONMENT DIVISION — System and file linkage
DATA DIVISION — All data definitions
PROCEDURE DIVISION — Executable logic
| Level | Meaning |
|---|---|
| 01 | Top-level group item or record |
| 02-49 | Subordinate group or elementary items |
| 66 | RENAMES clause (aliases) |
| 77 | Standalone elementary item (no group) |
| 88 | Condition name (boolean flag for a parent item's value) |
| Symbol | Meaning | Example |
|---|---|---|
| 9 | Numeric digit | PIC 9(8) = 8-digit number |
| X | Alphanumeric character | PIC X(40) = 40-char string |
| A | Alphabetic only | PIC A(10) |
| V | Implied decimal point | PIC 9(5)V99 = 99999.99 |
| S | Signed number | PIC S9(7)V99 |
| Z | Zero-suppress leading zeros | PIC ZZZ9 |
| $ | Currency sign (display) | PIC $$$9.99 |
PERFORM — Call a paragraph (structured GOTO equivalent)
PERFORM para-name — single callPERFORM para-name THRU end-para — rangePERFORM para-name UNTIL condition — loopPERFORM para-name VARYING x FROM 1 BY 1 UNTIL x > 10 — counted loopCALL — Invoke external COBOL program
CALL 'PROGRAM-NAME' USING param1, param2CALL 'PROGRAM-NAME' USING BY REFERENCE param (pass by ref)CALL 'PROGRAM-NAME' USING BY CONTENT param (pass by value)COPY — Include a copybook
COPY copybook-name — verbatim includeCOPY copybook-name REPLACING ==OLD== BY ==NEW== — with substitutionMOVE — Data assignment
MOVE value TO targetMOVE CORRESPONDING source TO target — field-name matchingEVALUATE — Switch/case
EVALUATE TRUE WHEN condition1 ... WHEN condition2 ...EVALUATE variable WHEN value1 ... WHEN OTHER ...READ/WRITE/OPEN/CLOSE/REWRITE/DELETE — File I/O verbs
GOTO — Unconditional branch (legacy, avoid in modern COBOL)
ALTER — Modifies a GOTO target at runtime (self-modifying, critical risk)