Versioned security assessment

Report ID: SA-D6155A39

2/25/2026, 3:20:42 AM

slack-gif-creator security assessment v1

Skill Security Certification Report

Audit History

Audit model: claude Historical report

Skill name: slack-gif-creator
Version: v1
Maintainer: sickn33
Source: github.com/sickn33/antigravity-awesome-skills/tree/main/skills/slack-gif-creator
Coverage: 7 Files scanned · 1,285 Lines analyzed
Policy version: Unavailable

Confirmed finding summary

No confirmed security findings

The completed audit recorded no confirmed security findings. This is not proof that the Skill has no side effects.

Installation context

Historical evidence

This report may not describe the currently installable artifact. Open the current Skill page for install guidance.

Open current Skill page

This report does not block or authorize the manifest or ZIP.

All 64 static findings are false positives. The skill is a legitimate GIF creation utility using standard Python libraries (PIL, numpy, imageio). No network calls, no external command execution, no credential access, and no data exfiltration. Static scanner was triggered by keywords in license text and code documentation.

Report position

Historical report

Open audit history before using this report to install.

Audit attestation

Not attestable

The required immutable binding is incomplete.

Human verification

Not verified

No human verification is recorded for this report.

Coverage

7 Files scanned · 1,285 Lines analyzed

0 items shown for review

Limitations

This report does not claim runtime or sandbox execution and does not prove the absence of side effects.

Evidence chain

Follow the evidence from source binding to the install contract. Available evidence supports verification; it is not a safety guarantee.

Source

Binding unavailable
Artifact

Identity incomplete
Audit

Complete
Install contract

Open manifest to verify
Open manifest

Capabilities observed

Observed means this report recorded supporting evidence. Not recorded does not prove that a capability is absent.

Contains scripts

May execute code included with the Skill.

Not recorded by this audit

Network access

May connect to external services.

Not recorded by this audit

Filesystem access

May read or write local files.

Not recorded by this audit

Env variables

May read values from the process environment.

Not recorded by this audit

External commands

May invoke commands or programs outside the Skill.

Not recorded by this audit

Risk findings

Confirmed security concerns are separated from items that still need review.

No confirmed security findings were recorded for this completed audit.

Expert evidence

Immutable subject identity, scanner metadata, dismissed matches, and source-level evidence.

Artifact subject

Marketplace commit: Unavailable
Content hash: Unavailable
Tree hash: Unavailable
Skill path: Unavailable
Audit payload hash: Unavailable

Analysis metadata

Audit model: claude

Analysis state: Complete

Scope is limited to the recorded files, lines, methods, and evidence. No runtime or sandbox execution is claimed.

Static false positives ignored (6)

High

core/easing.py:157-160

False Positive: C2 Keywords in Animation Constants

Variable names c1, c2, c3 in easing.py are animation easing constants (1.70158), not C2 (command-and-control) indicators. Standard animation math formulas.

The variables c1, c2, c3 are standard easing function coefficients used in back ease formulas - confirmed by mathematical context

High

core/easing.py:5 core/frame_composer.py:5 core/gif_builder.py:5 LICENSE.txt:61

False Positive: Weak Cryptographic Algorithm

Scanner detected imports at line 5 but these are standard image processing libraries (PIL, numpy), not cryptographic algorithms. No cryptography used.

Standard Python libraries for image processing - PIL/numpy are not cryptographic. License file triggered by standard legal text about cryptography.

High

core/frame_composer.py:19

False Positive: System Reconnaissance

Scanner detected 'import math' as system reconnaissance. This is standard Python math library for calculating polygon points in frame_composer.py.

The math module is used for star polygon point calculations - standard image processing, not reconnaissance

Medium

LICENSE.txt:4 LICENSE.txt:196

False Positive: Hardcoded URLs

URLs in LICENSE.txt are standard Apache License URLs (apache.org), not suspicious network indicators.

Standard Apache License URLs in license file - expected and legitimate

Medium

SKILL.md:155-161

False Positive: Dynamic Import Expression

SKILL.md shows Python import statements for the skill's own modules (core.frame_composer), not dynamic code loading.

Documentation showing legitimate module imports from the skill's own core package

Medium

SKILL.md:26-45

False Positive: Ruby/Shell Backtick Execution

Scanner detected backticks in SKILL.md but these are Markdown code fences (```python), not shell execution. The backtick detection is a scanner false positive.

These are Python code examples in Markdown fenced code blocks - standard documentation, not shell commands

Verify and export

JSON report CITATION.cff SARIF 2.1.0 Signed installation manifest

The manifest and lockfile bind install artifacts to cryptographic hashes. This integrity claim is separate from the security assessment.

Audit attestation: not_attestable