Investigate and fix the actual $ usages in Markdown content.
The $ fall into three classes:
- Currency (escape these) โ $1, $2 billion, R$ 549 โ these pairs cause all the warnings
- Real math (leave alone) โ $\rightarrow$, $O(1)\text{ streaming}$ โ valid, no warnings
- Shell code (leave alone) โ $(curlโฆ), , $HOME โ inside code blocks
Execute in 4 steps:
- Investigate โ greps the content, classifies every $ into currency / real math / shell code, and reports counts before changing anything.
- Apply โ checks the tree is clean, then writes and runs the exact tested Python script (code-fence-, inline-code-, frontmatter-, and math-span-aware; idempotent via the (?<!\\) lookbehind so re-running never double-escapes).
- Verify the diff โ the safety net: greps that must print nothing for real math ($\rightarrow$, \text) and shell vars ($HOME, $(โฆ), ). If anything legit was touched, it tells you to git checkout -- . and stops.
- Print instructions โ outputs the build-verify and commit/push commands for user to run.
Do not autonomously run any build, commit, or push.
