Skill loader executes markdown inline code as bash when content ends with !

Bug

The skill loader incorrectly parses markdown inline code spans as bash commands when a backtick-enclosed span ends with ! and is followed by another backtick span on the same line.

Minimal Repro

Create a skill with this SKILL.md:

---
name: backtick-bug-repro
description: Minimal repro. Only use when explicitly called.
---

`!!` x `y` z

Invoke with /backtick-bug-repro. Result:

Error: Bash command failed for pattern "!` x `": [stderr]
(eval):1: command not found: x

No allowed-tools field is needed — the bug is in the skill loader itself, not tool permissions.

What's happening

The parser extracts the text from the ! at the end of the first inline code span, through the closing backtick, across the plain text, up to the next backtick — i.e. ` !<text between spans> — and tries to execute it as a bash command via eval`.

Conditions

• An inline code span ending with ! (e.g. ` !! , a! alone doesn't trigger — needs !!`)
• Followed by any text
• Followed by another inline code span on the same line

Real-world impact

The /hike skill's SKILL.md contains walk syntax documentation:

...each step is a code fence with `!!` in the metastring. Tooltip content goes in `## !id` headings after the steps.

This makes the entire skill fail to load.

Environment

• macOS (zsh)
• Claude Code 2.1.42

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Issue generated with Claude Code