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Contracts are denser than invoices. A header (parties, effective date, term) plus a clause list with stable categories that downstream review tooling can filter on. 
from typing import List, Literal, Optional

from agno.agent import Agent
from agno.media import File
from agno.models.openai import OpenAIResponses
from pydantic import BaseModel, Field


ClauseCategory = Literal[
    "term_and_termination",
    "payment",
    "confidentiality",
    "indemnification",
    "limitation_of_liability",
    "warranty",
    "ip_assignment",
    "governing_law",
    "dispute_resolution",
    "non_compete",
    "other",
]


class Clause(BaseModel):
    category: ClauseCategory
    heading: Optional[str] = Field(None, description="Section heading as printed")
    text: str = Field(..., description="Clause text, verbatim")
    page: Optional[int] = Field(None, description="1-indexed page where the clause begins")


class Party(BaseModel):
    name: str
    role: Optional[str] = Field(None, description="e.g. Customer, Vendor, Licensor")
    address: Optional[str] = None


class Contract(BaseModel):
    title: Optional[str] = None
    contract_type: Optional[str] = Field(None, description="e.g. MSA, SOW, NDA, EULA")
    parties: List[Party] = Field(default_factory=list)
    effective_date: Optional[str] = None
    term: Optional[str] = Field(None, description="Stated term, e.g. '3 years from Effective Date'")
    governing_law: Optional[str] = None
    clauses: List[Clause] = Field(default_factory=list)


agent = Agent(
    model=OpenAIResponses(id="gpt-5.5"),
    instructions=(
        "Extract the contract header and every clause from the attached PDF. "
        "Clause text must be verbatim from the document. Assign each clause "
        "to the closest category; use 'other' if nothing fits. Do not "
        "summarize, paraphrase, or skip clauses."
    ),
    output_schema=Contract,
)

contract = agent.run(
    "Extract this contract.",
    files=[File(url="https://example.com/msa-acme.pdf")],
).content
# Contract(title='Master Services Agreement', contract_type='MSA',
#          parties=[Party(name='Acme Corp', role='Customer'),
#                   Party(name='Beta Labs', role='Vendor')],
#          effective_date='2026-01-15', term='3 years from Effective Date',
#          governing_law='State of Delaware',
#          clauses=[Clause(category='term_and_termination', ...), ...])
The Literal on category is what makes the output usable. Downstream review queues filter by category, so the categories must be a closed set. Free-text categories are unfilterable.

​
Review queues by clause type

Once clauses carry a category, route them by team. Indemnification and limitation-of-liability go to legal; payment and term go to finance. 
def route_for_review(contract: Contract) -> dict[str, list[Clause]]:
    legal = {"indemnification", "limitation_of_liability", "warranty", "ip_assignment"}
    finance = {"payment", "term_and_termination"}

    buckets: dict[str, list[Clause]] = {"legal": [], "finance": [], "other": []}
    for clause in contract.clauses:
        if clause.category in legal:
            buckets["legal"].append(clause)
        elif clause.category in finance:
            buckets["finance"].append(clause)
        else:
            buckets["other"].append(clause)
    return buckets
The agent does the extraction. The routing is plain Python, against a typed object. The split is auditable because each clause keeps its verbatim text and page.

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Diff against a template

For contract review, the question is often “what changed from our standard?” Extract both the incoming contract and your template into the same Contract schema, then diff by category. 
incoming = agent.run("Extract.", files=[File(url=incoming_url)]).content
template = agent.run("Extract.", files=[File(filepath="templates/msa-v3.pdf")]).content

incoming_by_cat = {c.category: c for c in incoming.clauses}
template_by_cat = {c.category: c for c in template.clauses}

deltas = [
    (cat, incoming_by_cat.get(cat), template_by_cat.get(cat))
    for cat in set(incoming_by_cat) | set(template_by_cat)
    if (incoming_by_cat.get(cat) and incoming_by_cat[cat].text)
       != (template_by_cat.get(cat) and template_by_cat[cat].text)
]
For a richer comparison, hand both contracts to a reviewer agent with output_schema set to a ClauseDelta model and let the model summarize the differences.

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Long contracts and chunking

OpenAIResponses(id="gpt-5.5") handles contract-length PDFs in a single call. For documents over the model’s context, split by section in your own code and run the agent per chunk. The schema is the same; you concatenate the clauses lists at the end.

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Next steps

TaskGuide
Schedule a nightly contract intake runBatch and durability
Send risky clauses to a human reviewerHuman routing and eval
Apply the same shape to intake formsForms and intake

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Developer Resources