# Value Analysis

> Use when working with a skill for performing value analysis to compute concrete or abstract values of program variables at each program point.

- Skill: `tomevault-io/value-analysis` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/value-analysis`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/value-analysis/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/value-analysis

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# Value Analysis

**Domain**: Abstract Interpretation / Static Analysis

## Overview

A skill for performing value analysis to compute concrete or abstract values of program variables at each program point.

## Capabilities

- Track concrete values (constants, ranges)
- Compute value intervals and bounds
- Identify invariant properties
- Detect constant propagation opportunities
- Handle complex data structures

## Techniques

- **Constant Propagation**: Fold constant expressions
- **Interval Analysis**: Numeric bounds computation
- **Value Range Analysis**: Min/max tracking
- **Pointer Value Analysis**: Nullity, allocation sites
- **Relational Analysis**: Relationships between variables

## Abstract Domains

- **Constant Domain**: Single values, top/bottom
- **Interval Domain**: Bounded numeric ranges
- **Polyhedra**: Linear constraints
- **Pointer Analysis**: Object creation sites
- **String Analysis**: String constants and operations

## Use Cases

- Compiler optimization
- Bug detection (null pointer, out of bounds)
- Program verification
- Security analysis

## References

See: `../abstract-interpretation-engine`, `../dataflow-analysis-framework`, `../constant-propagation-pass`, `../type-inference-engine`

## Research Tools & Artifacts

Real-world value analysis tools:

| Tool | Why It Matters |
|------|----------------|
| **Frama-C Value** | C value analysis |
| **Astrée** | Static analyzer |
| **Clang Static Analyzer** | LLVM analyzer |
| **Coverity** | Commercial analyzer |

### Key Systems

- **Astrée**: Industrial static analyzer
- **Infer**: Facebook analyzer

## Research Frontiers

Current value analysis research:

| Direction | Key Papers | Challenge |
|-----------|------------|-----------|
| **Precision** | "Precise Value" | Accuracy |
| **Scalability** | "Scalable Analysis" | Large code |

### Hot Topics

1. **ML for values**: Learning value ranges
2. **Wasm values**: Binary value analysis

## Implementation Pitfalls

Common value analysis bugs:

| Pitfall | Real Example | Prevention |
|---------|--------------|------------|
| **Imprecision** | Too coarse | Refine |

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<!-- tomevault:4.0:skill_md:2026-04-11 -->