Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ArabelaTso/Skills-4-SE --skill control-flow-abstraction-generatorgit clone --depth 1 https://github.com/ArabelaTso/Skills-4-SEWrote 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/skills/arabelatso/skills-4-se/control-flow-abstraction-generator)<a href="https://agentmods.dev/skills/arabelatso/skills-4-se/control-flow-abstraction-generator"><img src="https://agentmods.dev/badge/skills/arabelatso/skills-4-se/control-flow-abstraction-generator/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/skills/arabelatso/skills-4-se/control-flow-abstraction-generator"><img src="https://agentmods.dev/badge/skills/arabelatso/skills-4-se/control-flow-abstraction-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00121 | $0.03151 |
| Opus 5 | $0.00060 | $0.01576 |
| Sonnet 5 | $0.00024 | $0.00630 |
| Haiku 4.5 | $0.00012 | $0.00315 |
Grade A, and why
control-flow-abstraction-generator 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 12d 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 — 515 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Control Flow Abstraction Generator
Generate abstract Control Flow Graph representations of programs.
Overview
This skill analyzes program code and generates Control Flow Graphs (CFGs) that abstract the program's control flow structure. CFGs show how execution flows through the program via nodes (statements, conditions) and edges (control transfers), making them suitable for static analysis, formal verification, and program understanding.
How to Use
Provide:
- Program code: Function or program to analyze
- Analysis scope: Function-level or program-level
- Output format (optional): Textual, DOT, JSON, or multiple
The skill will generate:
- CFG with nodes and edges
- Node types (entry, exit, statement, condition, merge)
- Edge types (sequential, true/false branches, back edges, calls)
- Optional: DOT format for visualization, JSON for tool integration
CFG Generation Workflow
Step 1: Parse Program Structure
Identify program constructs:
- Sequential statements: Assignments, expressions, declarations
- Conditional statements: if-then-else, switch-case
- Loop statements: while, for, do-while
- Function calls: Direct calls, recursive calls
- Control transfers: break, continue, return, goto
- Exception handling: try-catch-finally
Step 2: Create CFG Nodes
Generate nodes for each construct:
Entry Node: Function/program start
- Label:
ENTRYor function name - Type:
entry - Successors: First statement
Exit Node: Function/program end
- Label:
EXITorreturn - Type:
exit - Predecessors: All return points
Statement Node: Regular statement
- Label: Statement text or line number
- Type:
statement - Represents: Assignment, call, expression
Condition Node: Branch decision
- Label: Boolean expression
- Type:
condition - Successors: True branch, false branch
Merge Node: Branch join point
- Label:
MERGEor empty - Type:
merge - Predecessors: Multiple branches
Step 3: Create CFG Edges
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 515 lines · 121 tokens per session scan A 7d23586f81ca
control-flow-abstraction-generator is a skill published in the GitHub repository ArabelaTso/Skills-4-SE (252 stars, last pushed 22d ago), licensed Apache-2.0. It adds 121 tokens to every session and 3,151 once invoked, about $0.0006 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 2026-08-30.
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