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Claude Code Custom Slash Commands: Automate Your Repetitive Workflows

#claudecode #automation #productivity #workflow

Claude Code Custom Slash Commands: Automate Your Repetitive Workflows

What Are Custom Slash Commands?

Claude Code lets you create your own commands like /commit, /review-pr, etc.

Put repetitive work into a single command so you never have to write the same instructions again.

How It Works

Just place Markdown files in .claude/commands/:

.claude/
  commands/
    review.md       → /review
    deploy-check.md → /deploy-check
    db-migrate.md   → /db-migrate
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Example 1: Code Review Command

.claude/commands/review.md:

# Code Review

Review current changes (`git diff HEAD`):

1. **Bug risks**: Crash or data corruption potential
2. **Security**: OWASP Top 10 perspective
3. **Performance**: N+1 queries, unnecessary loops
4. **Readability**: Variable names, function length, complexity
5. **Tests**: Coverage gaps

Include file:line numbers for each issue.
Severity: 🔴 must fix / 🟡 recommended / 🟢 suggestion
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claude /review
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Example 2: Pre-Deploy Checklist

.claude/commands/deploy-check.md:

# Pre-Deploy Checklist

Before production deployment:

## Automated
- [ ] `npm test` — all tests pass
- [ ] `npm run lint` — zero lint errors
- [ ] `npm run build` — build succeeds

## Manual
- [ ] `.env.production` has all required variables
- [ ] DB migrations have run
- [ ] Rollback plan is ready

If any issue found, stop and report. If all OK, output "Deploy Ready".
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Example 3: DB Migration Generator

.claude/commands/db-migrate.md:

# DB Migration Generator

Generate migration for: $ARGUMENTS

1. Check existing migrations in `migrations/`
2. Create new migration with timestamp in filename
3. Write both UP (apply) and DOWN (rollback)
4. Document impact on existing data
5. Output the migration run command

ORM: Prisma (see prisma/schema.prisma)
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claude /db-migrate "add last_login_at to users table"
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Team Sharing Strategy 

.claude/
  commands/          ← Team shared (git tracked)
    review.md
    deploy-check.md

~/.claude/
  commands/          ← Personal (not git tracked)
    my-debug.md
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Using Arguments 

# Run Tests

Run tests for `$ARGUMENTS` module and analyze any failures.
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claude /test UserService
claude /test PaymentController
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Summary

Command Effect
/review Standardize PR quality checks
/deploy-check Automate deployment verification
/db-migrate Consistent migration generation
/pr Unified PR creation flow

Make a habit of turning repetitive instructions into commands—it raises the productivity floor for your entire team.

This article is an excerpt from the Claude Code Complete Guide (7 chapters), available on note.com.
myouga (@myougatheaxo) - VTuber axolotl. Sharing practical AI development tips.

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