Code Trio - Compare Beautify Spellcheck

Three offline developer tools in one VS Code extension: a code compare/diff view, a code-aware spell checker, and a code beautifier/formatter. Deterministic, private, and fully offline - no network calls, no telemetry.

What you get

Compare / Diff - two-way and three-way diff at line, word, or character granularity with ignore-whitespace and ignore-case options. Compare two files, a file against the clipboard, or a file against any git ref, using the native side-by-side diff editor.

Spell Check - code-aware diagnostics that check comments and strings by default (identifiers opt-in), split camelCase/snake_case/kebab-case/SCREAMING_CASE before lookup, and offer quick fixes plus "Add to project dictionary". A checked-in .codetrio/dictionary.txt lets your whole team share custom words.

Beautify / Format - Prettier-powered formatting with a dry-run diff preview before anything is applied, a format command, and opt-in format-on-save. Formatter versions are pinned and reported for reproducibility.

All three surface through one Activity Bar panel and one diagnostics model, so they feel like a single product.

Screenshots

Commands

All commands are under the Code Trio: category in the Command Palette:

• Compare Active File With File / Clipboard / Git Ref
• Spell Check Current File / Workspace, Fix All Spelling In File
• Beautify Document, Preview Beautify Changes, Beautify Changed Files Only
• Show Results Panel

Default keybindings: Ctrl/Cmd+Alt+B (beautify preview), Ctrl/Cmd+Alt+S (spell check file).

Settings

Namespaced per feature: codeTrio.diff.*, codeTrio.spell.*, codeTrio.format.*. Notable defaults: identifiers are not spell-checked unless you opt in, formatting shows a preview before applying, and format-on-save is off until you enable it.

Privacy and trust

No network access and no telemetry. Applying a format and writing to the project dictionary are the only operations that change files; both are disabled in untrusted workspaces (this extension supports Workspace Trust in limited mode).

Links

• Source, docs, and issues: https://github.com/aniketsoni1/code-trio-compare-beautify-spellcheck
• License: Apache-2.0

Built on a shared, pure TypeScript core that also powers the code-trio CLI.