How it worksdemo

How a Weft agent works.

A finance case, with demo data: the invoice that arrives by email and ends up recorded in accounts payable. It takes 3 steps.

Step 01
Reads the document.
The Alfa Embalagens invoice arrives as a PDF by email. The agent opens the file and pulls out what matters.
inv-58213.pdfdemo
invoice
58213
amount
R$ 4,820.00
due date
Oct 30
Step 02
Checks against company data.
Compares the invoice with the purchase order and the supplier record, which are already in your systems.
company datademo
purchase order 1197
matches
supplier record
matches
previous invoices
same pattern
Step 03
Acts with a person approving.
Prepares the entry in accounts payable and waits. It only counts after Carlos, from finance, approves it.
accounts payabledemo
entry
INV 58213 · R$ 4,820.00
Carlosfinance✓ approved by Carlos

The agent does the repetitive part. The person who approves is someone on your team.

See the same case from the inside

Inside the agent

For those who want to look inside.

Next, the same invoice case, step by step, the way the agent sees it. Every technical term comes with a plain explanation.

01 Input
02 Tokens
03 Embeddings
04 Search
05 Reasoning
06 Action
07 Result

demoCase: Finance · email· PDF attached: invoice from supplier Alfa Embalagens

01 · Input

The request arrives in the middle of the mess.

An invoice PDF in the inbox, among spreadsheets and WhatsApp messages. That is how work really arrives.

emailSubject: Alfa Embalagens invoice
PDFinv-58213.pdf · 1 page
spreadsheetorders-september.xlsx
WhatsApp“Did the Alfa invoice arrive?”

02 · Tokens

Tokens.

The text is broken into pieces the model can read. Each piece becomes a number.

PDF attached: invoice from supplier Alfa Embalagens

PDF21480
·att1078
ached3313
:25
·invoice25184
·from505
·supp9313
lier8430
·Alfa42610
·Emb7731
al282
agens11796

03 · Embeddings

Embeddings.

Each passage becomes a point on a map of meaning. Similar things end up close together.

supplier
due date
amount
purchase order

2D map of meaning · demo

04 · Search (RAG)

RAG.

Before answering, the agent searches the company's own knowledge base. The answer comes from your documents, not from a guess.

question Does this invoice match the order?

retrieved from company datasimilarity

Purchase order 1197Alfa Embalagens · R$ 4,820.000.94
Supplier recordAlfa Embalagens · tax ID checked0.91
Previous Alfa invoices3 invoices · same pattern0.87

05 · Reasoning

Reasoning.

The model checks the data and writes the answer, one piece at a time.

Agent runningclaude-haiku-4-5

PDF attached: invoice from supplier Alfa Embalagens

Reads the PDF
Extracts fields
Checks the order
Records
Human review

INV 58213 · R$ 4,820.00 · due Oct 30. Amounts match purchase order 1197. Recorded in accounts payable.

06 · Action

Action, with people in control.

A tool call. The agent uses the company's system the way a person would, and someone on the team approves it before it counts.

tool callaccounts payable

record_account_payable({
  "supplier": "Alfa Embalagens",
  "invoice": "58213",
  "amount": 4820.00,
  "due_date": "10/30",
  "purchase_order": "1197"
})

Human reviewCarlos · finance✓ approved by Carlos

07 · Result

The weave is complete.

Invoice read, checked and recorded. AI ran through the process that already existed, without replacing anyone's system.

confidence97%

time2.4 s

AI costR$ 0.006

claude-haiku-4-5✓ approved by Carlosdemo

You just saw an agent from the inside. Weft builds this into the process your company already has, with a person in control.

A 30-minute call answers the first question.

No corporate pitch. You bring the process, I tell you whether software or AI moves the number. And if it doesn't, I tell you that too.

Free first call, 30 minutes by video
A slot in Lucas's calendar or a reply by email within 2 business days

Book a 30 min call Back to the home page

Reads the document.

Checks against company data.

Acts with a person approving.