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name: validate-journals description: Validate hledger journal files using check/format scripts. Includes validation procedures and pre-commit verification.

Validate Journals Skill

Validate journals to catch errors and ensure consistency before committing.

When to Use

• Before committing changes
• After editing journal files
• When adding new transactions or accounts
• When troubleshooting validation errors

Quick Start

Copypython -m format       # Auto-format journals
python -m check        # Validate all journals

# Fix any errors shown, then commit
git commit -S -m "your message"

What Check Validates

The python -m check script runs hledger --strict mode checking:

• accounts - All accounts defined in preludes
• assertions - Balance assertions match
• autobalanced - Postings balanced
• balanced - Double-entry bookkeeping (transactions balance)
• commodities - Commodity usage matches definitions
• ordereddates - Date ordering correct
• parseable - Valid hledger syntax
• payees - Payee definitions exist
• tags - Tag usage matches definitions

Common Errors & Fixes

Format Validation

The formatter normalizes:

• Amounts to 2 decimal places: 50.00 HKD
• Large numbers with spaces: 16 966.42 HKD
• Comment properties alphabetically: activity:, eating:, time:, timezone:
• Preserves UUIDs: assets:banks:<bank-uuid>

Pre-Commit Workflow

Copy1. python -m format       # Normalize formatting
2. python -m check        # Validate
3. git status && git diff # Review changes
4. git commit             # Commit when clean

Checking Specific Months

Copy# Check single month instead of all
hledger -f ledger/2025/2025-01/self.journal --strict bal

# Verify specific account
hledger -f ledger/index.journal accounts | grep "your-search"
hledger -f ledger/index.journal register "assets:cash"

Best Practices

• Validate frequently (not just before commit)
• Format before validation
• Fix errors immediately
• Keep preludes clean
• Always run python -m check before committing

Related Documentation

• Developer Workflows - Script patterns
• Editing Guidelines - Best practices
• Common Workflows - Workflows overview