Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ericrisco/rsc-harness --skill bookkeepinggit clone --depth 1 https://github.com/ericrisco/rsc-harnessWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ericrisco/rsc-harness/bookkeeping)<a href="https://agentmods.dev/skills/ericrisco/rsc-harness/bookkeeping"><img src="https://agentmods.dev/badge/skills/ericrisco/rsc-harness/bookkeeping.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00084 | $0.03290 |
| Opus 5 | $0.00042 | $0.01645 |
| Sonnet 5 | $0.00017 | $0.00658 |
| Haiku 4.5 | $0.00008 | $0.00329 |
Grade A, and why
bookkeeping scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Bookkeeping — the recording layer that makes the numbers trustworthy
You are the bookkeeper. Your job is ledger hygiene: record what already happened, classify it into the right account on the right side, and reconcile it to reality so nothing is invented and nothing is lost. You do not interpret the numbers, forecast them, or set prices — you make them true. Every downstream skill (../finance-ops/SKILL.md reading runway, ../financial-model/SKILL.md projecting it) is only as honest as the ledger you keep here.
The whole job is one loop: Record → Classify → Reconcile. Record the raw event from a source document, classify it to an account and a side, then prove the ledger matches the bank. If you ever skip the third step, the first two are just opinions.
Route out before you start
"Where does this post and does it balance" is bookkeeping; "what do these numbers mean for the business" is not. Route out when the ask is:
- Interpreting the numbers — runway, burn, P&L review, monthly finance cadence →
../finance-ops/SKILL.md. - Creating or sending a customer invoice, chasing payment (AR) →
../invoicing/SKILL.md. - Setting a price or margin on a product/service →
../pricing/SKILL.md. - Projecting future revenue, runway, hiring plans, scenarios →
../financial-model/SKILL.md. - Tracking cloud/infra/COGS spend granularly for ops decisions →
../cost-tracking/SKILL.md. - Reading/writing the Stripe API, syncing payouts programmatically →
../stripe/SKILL.md. - Building the spreadsheet mechanics — formulas, pivots — themselves →
../spreadsheet-ops/SKILL.md.
Rule 1 — every entry balances: debits = credits
Double-entry means each transaction touches at least two accounts, and total debits equal total credits — always. The check behind it is the accounting equation, which must hold after every posting:
Assets = Liabilities + Equity
Why: a single-sided entry can record a number that is internally impossible. If debits ≠ credits, you have not made a mistake of judgment — you have made a mistake of arithmetic, and the ledger is provably wrong. Never post until the two sides tie.
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 177 lines · 84 tokens per session scan A f2d9d5414e98
bookkeeping is a skill published in the GitHub repository ericrisco/rsc-harness (70 stars, last pushed today), licensed MIT. It adds 84 tokens to every session and 3,290 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
countbean-accounting
Rules for writing correct double-entry Beancount transactions when managing a Countbean cloud book — account naming, how to balance postings, categorisation, and safe ingestion. Use whenever recording, importing, or correcting financial data in a Countbean book.
bukio-cli
Drive bukio-cli — agent-first double-entry bookkeeping for SMEs across eleven jurisdictions. Book invoices, archive the originals, keep the books balanced.
ledger
Use for ANY monetary, accounting, ledger, journal, balance, P&L, fee, FX, invoice, tax, cost-basis, or valuation work. Exact Money.from (never floats or parseFloat), double-entry via JournalEntry + validateEntry + Ledger.apply, MCP moneycompute / ledgerpost, canon citations, Zero-Skip + Canonical Financial Artifact.…
ledger-audit
Whole-repo financial audit. Use for ledger-audit, financial audit, or /ledger-audit. Scan for non-kernel money math, reconstruct flows as JournalEntry sequences, prove with validateEntry + Ledger.apply + runTrace + auditHash.
ledger-verify
Verify a diff, file, or snippet against ledger invariants. Use when asked to ledger-verify, check for floats, find unbalanced entries, prove a journal, or before committing money code. Enforces Money.from, validateEntry, Ledger.apply, citations. CLI: npx ledger-verify --scan .
ledger-cite
Look up IFRS/GAAP citations from the ledger knowledge graph. Use for ledger-cite, "what's the IFRS rule for", "GAAP citation", revenue recognition, leases, cost basis, or /ledger-cite. Never invent a standard paragraph.