Skill catalogue

Twelve skills ship with HISAB. Each one is a YAML file + Python module. You can use them, modify them, or fork them as a starting point for your own.

Finance close

bank-reconciliation — Match a bank statement against the bank book by amount + date tolerance. Outputs matched, unmatched-in-statement, unmatched-in-book.
accrual-booking — From a list of invoices received without bills, draft accrual JEs and the reversing JEs for the following period.
prepaid-amortisation — Spread prepaid balances over their service period, draft monthly amortisation JEs.
depreciation-schedule — From an asset register, compute monthly depreciation (straight-line, declining balance, WDV).

ar-ageing — Bucket outstanding receivables by age (0-30, 31-60, 61-90, 90+). Aggregate by customer.
ap-ageing — Same, for payables. With early-payment discount opportunities flagged.
collection-emails — Draft customer-by-customer dunning emails based on ageing, tone configurable.
cash-position — Roll up multi-bank, multi-currency cash position with FX conversion.

variance-analysis — Budget vs actual with driver decomposition (price × volume × mix). Generates narrative commentary.
pnl-statement — Standard P&L from trial balance with period-over-period comparison.

audit-sample — Sample selection (random, monetary unit, judgemental) for SOX testing. Documents the methodology.
control-testing — Workpaper template for control testing, populated from the sample.

From the chat:

/skill bank-reconciliation
  statement_sheet: "Bank Statement"
  book_sheet: "Bank Book"
  tolerance: 5.00

Or just describe what you want in plain English — the AI picks the right skill automatically:

Reconcile the Bank Statement sheet with Bank Book. Tolerance of ₹5.

Each skill is a folder under %APPDATA%\HISAB\skills\<skill-id>\ containing:

skill.yaml — name, description, inputs (with types + validation), preconditions, outputs
main.py — the Python entry point. Receives inputs as kwargs, returns a dict of outputs.
README.md — optional documentation rendered when the user clicks "How it works".

See Authoring skills for the full format and a walkthrough of building one.