A design system for the human in the loop

Components that show how the agent reasoned, what it proposes and what a person approved.

Question: Did we pay any invoice twice?

AI · Awaiting review

Yes. Invoice MFL-58821 was entered twice and paid twice, $48,216.40 each time.

Found in supplier_invoices_fy2026_h1.csv. I can reverse the second entry, API-KUS-2607-00011, so the supplier owes it back.

Proposed journal entry

Reverse the duplicate payment

$48,216.40, period 2026-10

15 components

Grouped by the moment of a run where each one appears. The data comes from Kasane, a fictional printer maker.

Suggestions to start from, and the box you type in.

Ask about Kasane’s books, from the files it shared.
Suggested
Chat starter
A suggestion fills the box and never sends, so you can add the period first.
trial_balance_monthly.csv552 KBrunning
Chat composer
Nothing sends while a file is still uploading, and you can stop any answer.

The agent’s reasoning, plan and reads, shown while it works.

AI
H1 operating profit is ¥355m under budget. Exchange rates explain ¥317m of it.
Agent reasoning
Thinking stays folded until you open it, so nothing jumps while you read.
AI
Explain the H1 gap
Read trial_balance_monthly.csv for H1
Compare with budget_forecast_monthly.csv
Trace what remains to its accounts
Agent plan
The agent writes its plan where you can see it, before and while it works.
AI
Couldn’t read the columns in bank_export_kjp_2026-09.csv: it has no header row.
I’ll take both payments as the invoice file records them.
Tool
An action says it’s done only after it ran. A failure says what to do next.

The figures, files and sources behind an answer.

Lineage tree
Every number opens down to the entry behind it.
trial_balance_monthly.csv552 KBpassed
budget_forecast_monthly.csv1.3 MBpassed
forecast_memo_fy2026_6+6.md4 KBpassed
Attachment row
The file name is the link, so you can still select and copy it.
AI
Yes. Invoice MFL-58821 was entered twice and paid twice, $48,216.40 each time.
AP says the system blocks a repeated supplier invoice number.
Inline citation
Each figure names what it rests on, in the line where it appears.
AI
Sources
1
supplier_invoices_fy2026_h1.csv116 KB
2
05_interview_ar_ap_2026-10-14.txt4 KB
Not checked
KUS’s bank statements: the only bank file is bank_export_kjp_2026-09.csv, so both payments are as the invoice file records them.
Invoices outside H1: supplier_invoices_fy2026_h1.csv holds H1 only.
Sources
Lists what the answer rests on, and what wasn’t checked.

Where the run stops until a person answers or approves.

AI · Awaiting your answer
Which entities should the variance cover: all of them, or KJP only?
Question
One question, with options you can answer in a word.
AI · Awaiting confirmation
The variance summary is ready. H1 operating profit is ¥355m under budget, and exchange rates explain ¥317m of it.
Send the variance summary to the controller?
What changes
Nothing in the books. One message goes out.
Who it reaches
Kasane’s controller. No one else.
Confirmation
Before an action runs, you see exactly what it changes and who it reaches.
AI · Awaiting review
Yes. Invoice MFL-58821 was entered twice and paid twice, $48,216.40 each time.
Proposed journal entry
Reverse the duplicate payment
$48,216.40, period 2026-10
Agent block
An agent stops before anything that posts to the ledger.
You:
Did we pay any invoice twice?
AI
Yes. KUS paid supplier invoice MFL-58821 twice, $48,216.40 each.
Chat thread
The answer’s space appears when you ask, so it grows in place.

What the run leaves on record, and its state.

passedtrial_balance_monthly.csv
passedsupplier_invoices_fy2026_h1.csv
No header row, so its six columns can’t be matched to fields. Skipped; the other files were read.
Run log row
A failed run opens its error in place, so you keep your spot.
queued
running
passed
failed
stale
open
needs review
AI working
proposed
skipped
Status badge
Each run shows where it stands, so you can spot what failed and what needs you.

Kasane is a fictional printer maker. Its team works in channels, like Slack, and you play its controller.