Skill tool fails when SKILL.md contains markdown tables with pipe characters

Description

The Skill tool fails to load skills when the SKILL.md file contains markdown tables. Pipe characters (|) in tables are incorrectly interpreted as bash shell pipe operators during skill processing.

Error Message

Bash command failed for pattern "!` | `": [stderr]
/usr/bin/bash: eval: line 1: syntax error near unexpected token `|'
/usr/bin/bash: eval: line 1: `| < /dev/null'

Steps to Reproduce

1. Create a skill with a SKILL.md containing a markdown table:

``markdown
| Extension | Syntax | Scope |
|-----------|--------|-------|
| Variables | $variable_name; | Inline |
``

1. Invoke the skill using the Skill tool

1. Observe the bash syntax error

Expected Behavior

The Skill tool should properly escape or handle markdown content without passing it through bash shell interpretation.

Actual Behavior

Pipe characters in markdown tables are interpreted as shell pipes, causing a syntax error.

Environment

• OS: Windows 11
• Claude Code: Latest version
• Shell: Git Bash / PowerShell

Additional Context

The error pattern "! | " suggests the tool is combining content from:

• Inline code containing !a (example: ` !a `)
• Table pipe characters on adjacent lines

This creates an invalid shell command when the skill content is processed.

Workaround

Converting markdown tables to bullet lists avoids the issue, but this shouldn't be necessary.