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acsl-annotation-assistant

Create ACSL (ANSI/ISO C Specification Language) formal annotations for C/C++ programs. Use this skill when working with formal verification, adding function contracts (requires/ensures), loop invariants, assertions, memory safety annotations, or any ACSL specifications. Supports Frama-C verification and generates comprehensive formal specifications for C/C++ code.

95

1.03x
Quality

93%

Does it follow best practices?

Impact

100%

1.03x

Average score across 3 eval scenarios

SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

86%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is code-rich and highly actionable with well-organized progressive disclosure to real reference files. Its main gap is an explicit Frama-C verify-fix-retry feedback loop embedded in the workflow, and minor over-explanation of well-known concepts.

Suggestions

Add an explicit verification checkpoint to the Annotation Workflow (e.g. Step 6: run `frama-c -wp`, review unproved goals, revise annotations, re-run) to close the feedback loop.

Trim definitional prose that restates concepts Claude already knows (e.g. the gloss of 'preconditions'/'postconditions'/'loop variant') to tighten the token budget.

Cross-link the inline example sections to the relevant reference file (e.g. 'see common_patterns.md for more behaviors') to strengthen navigation.

DimensionReasoningScore

Conciseness

Mostly efficient and code-heavy, but some prose restates concepts Claude already knows (e.g. 'Preconditions (requires): What must be true when function is called') and could be trimmed.

4 / 5

Actionability

Provides numerous complete, copy-paste-ready ACSL examples — contracts, loops, memory safety, behaviors, axiomatics, and a fully annotated function — covering the common cases.

5 / 5

Workflow Clarity

The five-step Annotation Workflow is clearly sequenced, and incremental Frama-C verification is mentioned in Best Practices, but the feedback loop is not embedded as an explicit validate-fix-retry checkpoint inside the workflow.

4 / 5

Progressive Disclosure

SKILL.md serves as an overview with key examples while three real, one-level-deep reference files are clearly signaled in the Resources section with one-line descriptions and 'load as needed' guidance.

5 / 5

Total

18

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, well-structured description that concretely states capabilities and gives explicit, natural trigger phrases. It answers both what and when clearly and occupies a distinctive niche.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — function contracts (requires/ensures), loop invariants, assertions, memory safety annotations — plus Frama-C verification, giving comprehensive coverage of the ACSL domain.

5 / 5

Completeness

Explicitly answers both 'what' (create ACSL annotations, generate formal specifications, support Frama-C) and 'when' ('Use this skill when working with formal verification, adding function contracts...').

5 / 5

Trigger Term Quality

Includes the natural phrases a formal-verification user would say — 'formal verification', 'function contracts (requires/ensures)', 'loop invariants', 'assertions', 'memory safety', 'Frama-C' — with strong synonym coverage.

5 / 5

Distinctiveness Conflict Risk

ACSL/Frama-C formal verification is a clear niche with distinct triggers and minimal overlap with other skills.

5 / 5

Total

20

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
ArabelaTso/Skills-4-SE
Reviewed

Table of Contents

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