Answer the question using only the passages.

Question: What notice is required to terminate the agreement early?

[1]  3
 Does the record carry what produced the decision — not just the decision?
 Ask which policy version was in force, which model and configuration actually ran (not which was configured), and what the inputs were as received. A verdict without its causes tells you an incident happened without telling you whether it recurs. "Why did this look correct at the time" is almost always the real question. The tell the record shows the outcome and a timestamp, and nothing about the state that decided it.

[2] # The Verifier — specification for an independent implementation
### Preview specification · 11 September 2026 · for a format that is an **Internet-Draft**, not a standard

> **PREVIEW.** `draft-saha-stage-receipts-00` was posted at the IETF on 8 September 2026
> (<https://datatracker.ietf.org/doc/draft-saha-stage-receipts/>); it is a draft, not a standard.
> This document specifies what any verifier of that format must do, published
> now so that a second implementation can be written by someone who has never
> spoken to us. A reference implementation of roughly 140 lines ships beside it
> in `samples/verify.py`.

---

## 1. What a verifier is for

A verifier answers one question: **can a stranger, holding only these records,
establish what they assert — without trusting whoever produced them?**

Everything below follows from that sentence, including the refusals.

---

[3]  oneproof.dev · onedoor v0.7.0 shipped · canary verification package 10 Sept 2026 · onetrace method published, code in preparation · not a certification · anchoring opt-in, off by default · Apache-2.0

 The picture scrolls sideways on a small screen. Status as of 7 September 2026; when a status changes, this page is superseded in place, carrying its prior digest.

 WHAT IT IS NOTThree things this does not replace
 It is not your monitoring — that keeps its job; receipts answer a different question, later, for a different reader. It is not a judge of whether an answer is right — a receipt shows where an answer came from, not that it was correct. And it is not a certificate — it makes records checkable; whether you trust the people who ran the system is still your call, now made with the record in front of you.

[4] ---

## 4. Ring three — the framework matrix

The strongest test in the battery, and the one whose failure would matter most.

Four pipelines producing equivalent work, at pinned versions:

1. A **plain-Python control** — no framework, the reference path
2. **LangChain**
3. **Langflow**
4. **LlamaIndex**

**One verifier checks all four, blind.** The pass condition is not merely that
each set of records validates. It is that:

- the verifier requires no framework-specific handling, and
- **the verifier cannot tell from the records which framework produced them**,
 except where the instrument declaration deliberately says so.
