validate

A command for checking shell-script and PowerShell code for syntax errors and common quality problems.

In plain words
What is it for?
Use it before committing changes, after refactoring, or during code review; it also runs the project's tests.
Why use it?
It catches issues such as unquoted variables, missing error handling, undefined variables, and incorrect PowerShell parameters before they cause failures.

Command for Claude Code

Install

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.

agentmods
npx agentmods add commands/mylee04/code-notify/validate
Clone the repo
git clone --depth 1 https://github.com/mylee04/code-notify

Made for: Claude Code.

Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 334 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00007 $0.00334
Opus 5 $0.00003 $0.00167
Sonnet 5 $0.00001 $0.00067
Haiku 4.5 $0.00001 $0.00033

Measured yesterday against content hash bd1d9564e646, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

validate 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 yesterday.

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.

.claude/commands/validate.md · 88 lines

What it actually says

Validate Scripts

What This Command Does

  1. Runs shellcheck on all .sh files
  2. Validates PowerShell syntax on .ps1 files
  3. Checks for common issues
  4. Reports findings

When to Use

  • Before committing changes
  • After refactoring code
  • During code review

Process

1. Run Shellcheck

shellcheck bin/code-notify lib/code-notify/**/*.sh

2. Check PowerShell Syntax

# In PowerShell
$null = [System.Management.Automation.Language.Parser]::ParseFile(
    "scripts/install-windows.ps1",
    [ref]$null,
    [ref]$errors
)
if ($errors) { $errors | ForEach-Object { Write-Error $_ } }

3. Run Tests

make test

Common Issues to Check

Shell Scripts

  • Unquoted variables
  • Missing local in functions
  • Using [ ] instead of [[ ]]
  • Missing error handling
  • Undefined variables

PowerShell

  • Missing error handling
  • Unhandled exceptions
  • Incorrect parameter types
  • Missing -ErrorAction

Fix Common Issues

Unquoted Variables

# Before
echo $message

# After
echo "$message"

Missing Local

# Before
my_func() {
    result="value"
}

# After
my_func() {
    local result="value"
}
Changes

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.

  1. yesterday First seen · 88 lines · 7 tokens per session scan A bd1d9564e646

Subscribe to this mod's changes

validate is a command published in the GitHub repository mylee04/code-notify (288 stars, last pushed 3d ago), licensed MIT. It adds 7 tokens to every session and 334 once invoked, about $0.0000 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.