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bytesagain3

Assert

by bytesagain3 · GitHub ↗ · v1.0.0 · MIT-0
cross-platform ✓ Security Clean
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Install in OpenClaw
/install assert
Description
Assertion patterns reference — guard clauses, preconditions, invariants, and contract programming. Use when writing defensive code, validating inputs, or imp...
README (SKILL.md)

Assert — Assertion Patterns Reference

Quick-reference skill for assertion techniques, design-by-contract, and defensive programming patterns.

When to Use

  • Writing precondition checks for function inputs
  • Implementing class invariants and postconditions
  • Choosing between assertions and exceptions
  • Applying design-by-contract methodology
  • Understanding assertion behavior across languages

Commands

intro

scripts/script.sh intro

Overview of assertions — purpose, philosophy, and when to use them vs exceptions.

preconditions

scripts/script.sh preconditions

Precondition patterns: validating inputs, guard clauses, and fail-fast design.

postconditions

scripts/script.sh postconditions

Postcondition patterns: validating outputs and return value contracts.

invariants

scripts/script.sh invariants

Class and loop invariants — maintaining consistent state throughout execution.

languages

scripts/script.sh languages

Assertion syntax and behavior in Python, Java, C, JavaScript, Rust, Go.

contracts

scripts/script.sh contracts

Design-by-contract methodology — Bertrand Meyer's approach and modern implementations.

antipatterns

scripts/script.sh antipatterns

Common assertion mistakes: side effects, catching AssertionError, using in production flow.

strategies

scripts/script.sh strategies

Assertion strategies for different contexts: unit tests, production code, APIs, libraries.

help

scripts/script.sh help

version

scripts/script.sh version

Powered by BytesAgain | bytesagain.com | [email protected]

Usage Guidance
This skill appears to be a local, read-only reference implemented as a shell script that prints documentation. If you want maximum assurance, open and inspect scripts/script.sh yourself (it’s included) to verify there are no hidden network calls or commands beyond printing text; otherwise it is reasonable to install and use. Also note that when invoked the agent will run the script locally (normal behavior) — no credentials or external installs are required.
Capability Analysis
Type: OpenClaw Skill Name: assert Version: 1.0.0 The 'assert' skill is a purely educational reference tool providing information on assertion patterns, design-by-contract, and defensive programming. The 'scripts/script.sh' file contains only static text output via heredocs (cat << 'EOF') for various informational commands, and 'SKILL.md' contains standard instructions for an AI agent without any signs of prompt injection or malicious intent.
Capability Assessment
✓ Purpose & Capability
Name/description match the provided content: SKILL.md documents assertion patterns and the included scripts/script.sh prints reference material. No unrelated credentials, binaries, or install steps are requested.
✓ Instruction Scope
Runtime instructions simply invoke scripts/script.sh with a single subcommand (intro, preconditions, etc.). The script prints documentation via here-docs; the SKILL.md does not instruct reading unrelated files, accessing environment secrets, or contacting external endpoints.
✓ Install Mechanism
No install specification; the skill is delivered as an instruction file plus a local shell script. No external downloads, package installs, or archive extraction are requested.
✓ Credentials
The skill declares no required environment variables, credentials, or config paths. The included shell script does not reference credentials or environment secrets in the provided content.
✓ Persistence & Privilege
always is false and the skill does not request elevated or persistent presence. It does not modify other skills or system-wide configuration based on the provided files.
How to Use
  1. Make sure OpenClaw is installed (local or Docker)
  2. Run the install command in chat: /install assert
  3. After installation, invoke the skill by name or use /assert
  4. Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
publish v1.0.0
Metadata
Slug assert
Version 1.0.0
License MIT-0
All-time Installs 1
Active Installs 1
Total Versions 1
Frequently Asked Questions

What is Assert?

Assertion patterns reference — guard clauses, preconditions, invariants, and contract programming. Use when writing defensive code, validating inputs, or imp... It is an AI Agent Skill for Claude Code / OpenClaw, with 166 downloads so far.

How do I install Assert?

Run "/install assert" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.

Is Assert free?

Yes, Assert is completely free, licensed under MIT-0. You can download, install and use it at no cost.

Which platforms does Assert support?

Assert is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).

Who created Assert?

It is built and maintained by bytesagain3 (@bytesagain3); the current version is v1.0.0.

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