Cash Flow Snapshot

Produces a 30/60/90-day cash flow forecast with percentage-variance confidence bands and named risk flags. Delivers a two-part output: a concise chat summary and a downloadable XLSX workbook.

When inputs are supplied through report URLs, read the SandBase API map. Resolve the current schema with sandbase_describe_tool before using a listed capability through sandbase_call_tool.

Quick start

"Will I make payroll next month?"

The agent pulls AR/AP and fixed costs from authorized connected sources or supplied files, calculates expected inflows and outflows across 30, 60, and 90-day windows, applies confidence bands based on each customer's historical payment variance, and flags specific risks by name.

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Workflow

Step 1 — Identify available data sources

Check which authorized sources are available. Prefer them in this order when present:

1. QuickBooks — primary source for AR aging, AP, and fixed costs
2. PayPal — transaction history and settlement timing
3. Stripe — charge and payout history
4. Square — sales and payout history
5. CSV upload — fallback if no connector is connected

If no connector is live and no file is attached, ask the user to either connect a source or upload a CSV (income/expense tabular data, any reasonable format). Note which sources were used in the output — this affects confidence band width.

Step 2 — Pull the data

From QuickBooks:

• Opening cash balance and as-of date
• AR aging report: customer name, invoice amount, invoice date, due date, days outstanding
• AP: vendor name, amount due, due date
• Recurring fixed costs: rent, payroll, subscriptions (look for recurring transactions)

From PayPal / Stripe / Square:

• Settlement history: transaction date, amount, settlement date
• Use settlement lag (transaction date → payout date) to compute each source's average and variance payment delay

From CSV upload:

• Parse as income/expense tabular data
• Required columns (flexible naming): date, amount, type (income or expense), description
• If columns are ambiguous, show the header row and ask the user to confirm mapping
• Obtain an opening cash balance and as-of date before claiming ending liquidity or payroll coverage

Step 3 — Compute historical payment timing

For each AR customer (or income source from CSV), calculate:

• Mean payment lag — average days from invoice/transaction date to receipt
• Payment variance — standard deviation of payment lag across last 6–12 payments
• Use variance to set confidence band width (see Step 4)

If fewer than 3 payments exist for a customer, use the population mean as the point estimate and apply a ±30% variance band as the default. When running on CSV data with sufficient history (≥3 payments per source), compute the band from the actual payment variance — do not assume ±30%.

Step 4 — Build the 30/60/90-day forecast

Produce three time windows: 0–30 days, 31–60 days, 61–90 days.

For each window, compute:

Line	Method
Expected inflows	AR due in window, adjusted for mean payment lag
Expected outflows	AP due in window + fixed costs falling in window
Net cash flow	Inflows − Outflows
Confidence band	± weighted average payment variance as a % of expected inflows

Confidence band formula:

band_pct = weighted_avg_stddev_days / avg_payment_lag_days
band_amount = expected_inflows × band_pct
low_net_flow  = net_cash_flow − band_amount
high_net_flow = net_cash_flow + band_amount

Display band_pct as a percentage rounded to one decimal place. Cap at ±50% — higher variance means the data is too thin to model; flag it instead (see Step 5).

When opening cash is available, calculate liquidity separately:

expected_ending_cash = opening_cash + cumulative_expected_net_flow
low_ending_cash      = opening_cash + cumulative_low_net_flow
high_ending_cash     = opening_cash + cumulative_high_net_flow

Without opening cash, report net cash flow only and state that ending liquidity and payroll coverage cannot be determined.

Step 5 — Flag named risks

Scan for timing gaps and, when opening cash is available, conditions that push low-case ending cash negative or create a liquidity crunch. For each risk found, produce a one-line flag:

• Late-payer risk: "Customer X historically pays 18 days late; that shifts their $8,400 invoice out of the 30-day window into day 48."
• Payroll crunch: "Payroll ($22,000) hits April 15. Low-band cash on hand April 14: $19,200. Shortfall risk: $2,800."
• Thin data warning: "Only 2 payments on record for Customer Y — confidence band set to default ±30%."
• No-connector warning: "Running on CSV data only — no real-time AP or recurring cost data. Confidence bands are wider than normal."

Limit to the top 5 risks by severity (largest dollar impact first).

Step 6 — Deliver outputs

Chat summary (always):

Cash Flow Snapshot — [date range]
Source(s): [connectors used]

            Expected    Low       High
30-day net: $X,XXX     $X,XXX    $X,XXX
60-day net: $X,XXX     $X,XXX    $X,XXX
90-day net: $X,XXX     $X,XXX    $X,XXX

⚠ Risks flagged: [count]
  • [risk 1]
  • [risk 2]
  ...

XLSX workbook (when requested and supported): Use the host's spreadsheet capability when the user requests a workbook and that capability is available. Otherwise provide the same tables as Markdown or CSV. A workbook has three sheets:

1. Summary — the 30/60/90 forecast table with confidence bands. Beneath each window row, expand inline sub-rows showing the individual transactions that make up its inflows (green) and outflows (red). This makes the estimates auditable without leaving the Summary sheet.

2. Detail — all transactions grouped by window, sorted by date within each group. Include a running net column (cumulative inflows minus outflows within the window) and a subtotal row at the bottom of each window showing total inflows, total outflows, and net. Grey out past transactions in a separate section at the bottom for reference. Ensure all three windows have rows even if one is empty — show a "No transactions in this window" placeholder row.

3. Risks — the flagged risks with dollar impact and affected window.

Save as cash-flow-snapshot-[YYYY-MM-DD].xlsx.

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Approval gates

No destructive actions — this skill is read-only. Generating a forecast from supplied files or already-authorized sources requires no additional approval.

Remind the user after delivery:

"This forecast is based on [sources listed]. It is not a substitute for accounting advice — verify with your bookkeeper before making financing decisions."

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Reference files

File	Load when
reference/gotchas.md	When a connector returns unexpected data or variance is extreme
reference/examples/worked-example.md	When modeling the output format for a new data shape