Numbers-LE
Extract every hardcoded number in a codebase, so a person can check them
No editor in the loop? npx -y numbers-le-mcp runs the same engine as an MCP server, so an agent can call extract_numbers with nothing else installed, and cargo install numbers-le puts the same check in a terminal. Every way to install it.
Overview
What Numbers-LE does
Numbers are the values most likely to be wrong and least likely to be read. Numbers-LE pulls every numeric value out of a config, fixture or data file into a plain list, so ranges and outliers are visible at a glance instead of buried in syntax. It parses JSON, YAML, CSV, TOML, INI and .env, and falls back to scanning plain text for anything else.
What people use it for
Data validation
Pull the numbers out of a config or fixture and eyeball the ranges at a glance.
Config audits
Compare ports, thresholds and limits across INI, TOML and .env files.
CSV work
Extract everything, one column, or several columns into separate documents.
Palette
5 commands
Open the command palette and type the name. Nothing is bound to a shortcut by default — the editor's keymap is the user's, not ours.
numbers-le.showPositions: Show the line and column of each number. Off by default.
- Extract Numbers
numbers-le.extractNumbers - Deduplicate Numbers
numbers-le.postProcess.dedupe - Sort Numbers
numbers-le.postProcess.sort - Open Settings
numbers-le.openSettings - Help & Troubleshooting
numbers-le.help
Install
Install Numbers-LE
VS Code
ext install nolindnaidoo.numbers-leOpen Quick Open (Cmd/Ctrl+P) and paste.
Cursor / Windsurf
cursor --install-extension nolindnaidoo.numbers-leCursor, Windsurf, VSCodium and the other VS Code forks pull from Open VSX. The id is the same as on the Marketplace.
AI agents
npx -y numbers-le-mcpRuns Numbers-LE's engine as an MCP server, so an agent can call extract_numbers with no editor involved. VS Code 1.101+ needs nothing — the extension registers it for you.
Channels
Where it ships
One engine, 5 places to get it. Copy the one for the editor you use.
Links
Where Numbers-LE lives
- VS Code Marketplacenumbers-le
- Open VSXfor Cursor, Windsurf and VSCodium
- npmnumbers-le-mcp
- GitHubsource, issues, changelog
- MCP registryio.github.nolindnaidoo/numbers-le
The family
The other 16
String-LEExtract every string in a codebase, so a person can read them
Paths-LEExtract every file path in a codebase, and say whether it still points at anything
Colors-LEExtract every color in a codebase, and say which ones are not in your palette
URLs-LEExtract every URL in a codebase, with its protocol and exact position
Dates-LEExtract every date and timestamp, and the exact instant each one resolves to
Units-LEExtract every quantity with its unit, normalized, and refuse the ambiguous ones by name
IDs-LEExtract every UUID, ULID, NanoID, ObjectId and Snowflake, and decode the time inside
IPs-LEExtract every IP address, CIDR block and MAC, normalized and classified by scope
Regex-LEFind every regex in a codebase, and report which can be driven into catastrophic backtracking
Scrape-LECheck whether a page is scrapeable before the scraper is written, and say when it cannot tell
Versions-LEFind where one dependency is constrained differently across a repository's manifests
i18n-LEIdentify the i18n library a project uses, then audit its catalogs by that library's rules
DecisionLintLint Jev and Luna questions before they are sent: the questions you write for TypeSafe's Jev, OpenAI's Decisions API (gpt-6-luna) or any platform that serves one, as you type, with no API key and no network calls. An optional command asks the model itself to check a file
Secrets-LEFind hardcoded credentials in a codebase, and never print one into the report
EnvSync-LECompare the dotenv files in a tree, and say which keys are missing from which
Unicode-LEFind the Unicode that hides meaning — bidi controls, invisibles, homoglyphs, mixed scripts