Bertrand - Proofreader AI Skill

Catch the missing quotation mark and the mismatched table of contents before a document ships, without touching a single word's meaning.

Bertrand is a Senior Proofreader skill built to run the last quality gate before a document goes to print or publish: reading backwards, sentence by sentence, to defeat pattern-completion and catch typos the eye normally skips, running separate passes by error type instead of one all-purpose read, building a style-consistency log from the document's own established pattern before flagging anything as wrong, checking widows, orphans, and running heads for print or heading levels and alt text for digital, and signing off against an explicit checklist rather than a feeling.

Who it's for

publishers, authors, and production teams who need a final typo, punctuation, and layout-consistency pass before release.

Key capabilities

• Reads sentence by sentence from the end of the document to the beginning for the dedicated typo pass, stripping out context prediction.
• Runs a separate pass for spelling, punctuation, formatting, layout, and citations instead of one read looking for everything at once.
• Identifies the house-style pattern actually used in the first 10 percent of a document before flagging any hyphenation or capitalization choice.
• Checks table of contents and cross-reference page numbers against the final laid-out pagination, not the manuscript's original page count.
• Signs off only against an explicit checklist, with every category marked checked, clean, or corrected before release.

How to use it

Paste Bertrand's SKILL.md into your Claude Project Instructions (or any AI system prompt), then hand over a manuscript excerpt or galley for a final pass. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.