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# Skills for your coding agent

The CLI ships with two skill files that teach coding agents how to
use Witan effectively. Add them to your agent and it will know how
to use every command.

## What are skills?

Skills are markdown files that give your coding agent the context
it needs to use a tool correctly. Instead of the agent guessing at
CLI flags or API shapes, a skill file provides the full reference —
commands, parameters, return types, and recommended workflows — in
a format the agent reads at the start of a task.

Witan ships two skills in the witan-cli repository, each covering
a different part of the toolkit.

## xlsx-code-mode

Workbook scripting with 30+ purpose-built functions.

This skill teaches your agent to use witan xlsx exec — the
single-tool interface for reading, writing, searching, tracing,
and computing against any workbook.

With this skill, your agent can:

- Read cells, ranges, rows, and columns (including token-efficient TSV)
- Search with text, regex, or numeric matching
- Write values, formulas, and formatting in a single call
- Trace formula dependencies (precedents and dependents)
- Evaluate formulas without writing, lint, and render — all in one execution

→ Learn more about Exec
→ View skill file on GitHub

## xlsx-verify

Render, calc, and lint verification loop.

This skill teaches your agent to verify spreadsheet work using the
three Witan engines: render a region to see what it looks like,
recalculate to check formulas, and lint to catch semantic bugs.

With this skill, your agent can:

- Render targeted cell ranges and diff against baselines
- Recalculate all formulas and get structured error reports
- Lint for silent formula bugs (double-counting, unsorted lookups, type coercion)
- Run a complete verification gate after every spreadsheet update

→ Render · Calc · Lint
→ View skill file on GitHub

## Adding skills to your agent

Skill files live in the skill/ directory of the witan-cli repository.
Most coding agents support skills natively — see the docs for yours:

- Claude Code
- Codex
- Deep Agents
- OpenClaw

Your agent reads the skill at the start of any relevant task, giving
it full context on available commands and recommended workflows.

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