Borrowing it
Nothing to install: this file belongs to dsheard/cobol-o-matic. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/dsheard/cobol-o-matic/main/CLAUDE.mdgit clone --depth 1 https://github.com/dsheard/cobol-o-maticWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/dsheard/cobol-o-matic/claude-md)<a href="https://agentmods.dev/instructions/dsheard/cobol-o-matic/claude-md"><img src="https://agentmods.dev/badge/instructions/dsheard/cobol-o-matic/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/dsheard/cobol-o-matic/claude-md"><img src="https://agentmods.dev/badge/instructions/dsheard/cobol-o-matic/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01998 | $0.01998 |
| Opus 5 | $0.00999 | $0.00999 |
| Sonnet 5 | $0.00400 | $0.00400 |
| Haiku 4.5 | $0.00200 | $0.00200 |
Grade A, and why
cobol-o-matic CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.
COBOL Reverse Engineering Tool
An agentic tool that reverse-engineers COBOL applications into structured markdown artifacts. Uses the Claude Agent SDK to spawn specialised subagents.
Directory Layout
analyse.py # Thin CLI entry point
orchestrator/ # Core Python package
├── __init__.py # Shared constants and utilities
├── models.py # Dataclasses (Discovery, Paragraph, Chunk, Manifest)
├── state.py # State persistence and convergence tracking
├── parser.py # Deterministic COBOL structural parser
├── stager.py # Chunk staging pipeline
├── validator.py # Deterministic artifact validation
├── tracing.py # JSONL event logging and optional OTEL tracing
├── config.py # Config loading, defaults, workspace scaffolding
├── agents.py # Agent construction, SDK interaction, critic
├── runner.py # Run strategies, phased execution, sweep
└── cli.py # CLI argument parsing, command handlers, main()
prompts/ # Agent prompt builders (one per worker)
├── _helpers.py # Shared helpers (_source_context, _read_template, etc.)
├── inventory.py # Inventory worker prompt
├── data.py # Data worker prompt
├── business_rules.py # Business rules worker prompt (+ chunked variant)
├── flow.py # Flow worker prompt
├── integration.py # Integration worker prompt
├── requirements.py # Requirements-deriver prompt
├── test_specs.py # Test-specs-deriver prompt
├── implementation.py # Implementation-plan-deriver prompt
├── critic.py # LLM critic prompt for corrective passes
└── orchestrator.py # Orchestrator prompt and helpers
templates/ # Output artifact templates (frontmatter schema + sections)
examples/ # Reference configs for open-source COBOL apps
workspace/ # Analysis workspace (agents run here)
├── config.yaml # Config: source paths, output dir, settings
├── CLAUDE.md # Agent-focused output conventions
├── source/ # COBOL input files
├── output/ # Generated markdown artifacts
├── staging/ # Chunked files for large programs
├── state/ # Run state JSON files (convergence tracking)
└── logs/ # JSONL event logs and agent transcripts
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 164 lines · 1,998 tokens per session scan A 9b3948aaf7c0
cobol-o-matic CLAUDE.md is an instructions file published in the GitHub repository dsheard/cobol-o-matic (5 stars, last pushed 5mo ago), licensed MIT. It adds 1,998 tokens to every session, about $0.0100 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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