# Job receipts

A job's receipt, as [the provider protocol's §8](../../extensions/quantum-providers.md#8-the-receipt)
states it, judged by two verifiers that share no code. Each must give every receipt here
exactly the reasons the manifest names (§8.4): none for a valid one.

| file | what |
|---|---|
| `manifest.json` | every receipt in `jobs/`, the reasons a verifier must give it, how it was made, and what it is. Every expectation is written by hand from §8.4; none is copied from a verifier's output |
| `jobs/cli-*.json` | made by the command line on this machine, sealed with the published demo key (`make.sh`): runs by several methods, a compile, runs on the reference provider over a local process, free and priced, and jobs under a contract (§8.7), here, routed to the person's providers and on a provider named under a ceiling |
| `jobs/cli-wasmq-*.json` | wasmQ jobs ([quantum-wasmq](../../extensions/quantum-wasmq.md)) made by the command line from the profile's own envelopes (`../wasmq/envelopes/`) with the demo key (`make.sh`): a run of the surface-code round, one of a single instance for the whole run, and faults in a call, of the run's budget, in an instance's init and in a prior |
| `jobs/cli-wasmq2-*.json` | wasmQ/2 jobs (quantum-wasmq §11) made the same way from the second version's envelopes: the exact method (a Toffoli, a feedback rotation, angle arguments, rotations and a reset), and one Clifford program by each method; each with the energy the host it was made on read of its run (§11.5) |
| `jobs/cli-landscape-*.json`, `jobs/cli-landscape2-*.json` | energy-landscape jobs the command line sealed with the demo key (`make.sh`), of the first version ([quantum-landscape](../../extensions/quantum-landscape.md)) and of the second ([quantum-landscape-2](../../extensions/quantum-landscape-2.md)): of each, a sampling run, a settle, a quench, a replay, a sweep, a comparison, and runs on the reference provider over a local process, free and priced (quantum-providers §11). The second version's sampling runs state their joules unpriced, and its settle and quench are priced |
| `jobs/cli-qudit-*.json` | qudit jobs (`wai.quantum.qudit/1`, [quantum-sim §9.7](../../extensions/quantum-sim.md)) the command line sealed with the demo key (`make.sh`): a qutrit Bell pair with its amplitudes, ququarts under a phase, two qudits of six levels, and three qubits as a qudit job of dimension 2 |
| `jobs/service-*.json` | made by the free job service, sealed with its key (`make.sh`) |
| `jobs/service-wasmq*-*.json`, `jobs/service-qudit-*.json` | made by a job service built from this checkout (`make.sh` with `WAI_QSVC_BIN`), each run as a job and sealed with its key: the surface-code round, a wasmQ/2 run by the exact method with the energy the service read of its worker, a fault sealed, and a qutrit Bell pair; each the service's report, whose own members nothing seals |
| `jobs/scripted-sampler-v2-post-selected.json` | a `sampler-v2` device that answered 13 fewer shots than it was asked for, as a post-selected readout does: its counts sealed as the shots it kept, `accepted_shots` (§8.1) (`wai-quantum-qpu/tests/clients.rs`, `a_device_that_keeps_fewer_shots_than_asked_seals_how_many_it_kept`) |
| `jobs/scripted-*.json` | provider jobs of every built-in kind (`sampler-v2`, `prx-circuits`, `native-turns` with and without a noise model, `cloud-tasks` on a processor and on its simulator, with rows of shots and with probabilities), each through a service that follows that provider's published contract, sealed with the demo key (`wai-quantum-qpu/tests/clients.rs`, `every_built_in_kind_states_what_it_sent_and_its_receipt_keeps_every_rule`, with `WAI_QUANTUM_RECEIPT_CORPUS` set to this directory); `prx-circuits` under a contract, its device's counts with a classical method's beside them (`a_built_in_kind_runs_under_a_contract_and_a_classical_method_shadows_it`); and `prx-circuits` in both its rows: `scripted-prx-circuits.json`, the client that sent circuits and shots alone, and `scripted-prx-circuits-pinned.json`, the job pinned to its calibration set with decoupling sent off; and `scripted-prx-circuits-recalibrated.json`, through a fake built from that service's published models that recalibrated between the read and the submission, the job pinned, placed by the calibration's quality metrics, and its result naming the set the service compiled against (`wai-quantum-qpu/tests/prx_circuits.rs`, `prx_circuits_pins_the_calibration_it_read`) |
| `jobs/scripted-native-turns-*.json` (but `-noise`) | `native-turns` against a fake of its service's published API (`wai-quantum-qpu/tests/native_turns.rs`, with `WAI_QUANTUM_RECEIPT_CORPUS` set): a processor read from the service's list, its counts tallied from shot records; one whose records flag three shots as leaked (`leakage`, §8.1); the simulator under a noise model, sent the job's seed (§8.3's seeded row); a processor of `gpi`, `gpi2` and `ms` (basis `gpims`); and a gate-priced processor named under a ceiling |
| `jobs/first-form-*.json` | sealed by the job service as it was on 18 October 2026 (commit 72d18742d), so by the first form's own writer, not by a restatement of it |
| `jobs/fixture-*.json` | the engine's pinned fixtures, sealed by earlier engines: a run before results named their engine, a provider job of the earlier form, and a compile |
| `jobs/crafted-*.json` | made by `generate.py` from the receipts above, each changed one way: the seal's form, the strict signature (a weak-key forgery, `S + ℓ`, a mixed-order key, …), the first form, what any JSON reader and writer may do (and so must change nothing), the strict reader, and each rule of a provider's result, of a wasmQ job's form and of an energy-landscape job's form in each version, each sealed again with the demo key where the change is inside the seal so that one rule alone breaks |
| `jobs/crafted-time-*.json` | receipts that seal a time (§8.2), made by `generate.py`: issued, issued with an end, the same times written as other numbers, the largest a receipt states; a time changed, taken off, given an end, or put on a receipt that sealed none (`digest_mismatch`: the time is inside the digest); and each thing that is not a time of its form (`receipt_form`) |
| `held/*.json` | receipts judged held to a trust list or a time beside their seal ([§8.8](../../extensions/quantum-providers.md#88-whose-key-and-when)), made by `generate.py`. The manifest's `held` names, for each, what it is held to and the reasons a verifier must then give: a key's window at its first moment, its last and its end; a revocation a millisecond before and at its time; a receipt that seals no time against a window with no end, one that ends, and a revoked key; a key the list does not name; a rotation, each key on each side of it; and a time before a receipt's end, at it, at its issue, before it, and within and past an allowance. They are kept apart from `jobs/`, whose verdicts are a receipt's alone, held to nothing |
| `trust/*.json` | trust lists (§8.8), made by `generate.py`: six a verifier reads (a key open from the start, in a window, revoked, retired by a rotation with the transition both keys signed, another key alone, and a window whose times are written as other numbers), and `refused-*`, each not of its form one way, which a verifier refuses whole: it judges nothing by one, and exits 2. The manifest's `trust_lists` says which is which |

The made receipts are kept as they were made, each pinned by its digest in `made.lock.json`:
a receipt missing or changed fails `generate.py --check`. A receipt made again differs in its
times (and, from the service, perhaps its key) and verifies all the same, so none is made again
to pass a test. A row of §8.3 that a client stops writing is held by the receipt that has it.

## The two verifiers

- `wai-quantum verify --json FILE` (and `--lines FILE`, one job a line): the reference,
  `wai_quantum::engine::job::check`.
- [`../tools/receipt_verify.py`](../tools/receipt_verify.py): written in Python from §8
  alone, by a reader who had not seen the reference. Its `wasmq_form`, a wasmQ job's form,
  was written the same way from [quantum-wasmq §6.5](../../extensions/quantum-wasmq.md#65-verifying),
  whose rules are numbered so that each can be read alone, and the second version's from
  [§11.6](../../extensions/quantum-wasmq.md#116-verifying) there (rules 4, 8, 11, 12 and 30 as
  that version reads them, and 36, its energy). Its `landscape_form`, an energy-landscape
  job's form, was written from the numbered rules of
  [quantum-landscape §5.4](../../extensions/quantum-landscape.md#54-verifying-an-answer), and
  the second version's from the list in
  [quantum-landscape-2 §5.4](../../extensions/quantum-landscape-2.md#54-verifying-an-answer)
  (rules 2, 3, 6, 8 and 10 as that version reads them). Standard library only: its BLAKE3,
  Ed25519, RFC 8785 text and strict reader are its own, each held to published answers by
  `--self-test`.

[`../tools/receipt_differential.py`](../tools/receipt_differential.py) holds them to each
other:

```sh
python3 -I receipts/generate.py --check                       # the crafted half is as written
python3 -I tools/receipt_verify.py --self-test ../wai-quantum/src/engine/testdata/es-number-tostring.txt
python3 -I tools/receipt_differential.py --reference PATH/wai-quantum
python3 -I tools/receipt_differential.py --reference PATH/wai-quantum --plant lenient-key
python3 -I tools/receipt_differential.py --second-only        # no build: the second verifier and the manifest
```

The differential requires, for every receipt here, that both verifiers and the manifest name
the same reasons, and that both verifiers state the same key, form, class read by provenance,
counts' source and the time the receipt seals. It gives both each receipt of `held/` with the
trust list and the time the manifest holds it to (`--trust`, `--at`, `--skew-ms`, which the
two take alike), and requires the manifest's reasons from both and the same statement of what
it was held to; and each list of `trust/`, which both must read, or both refuse whole. Then it changes every valid receipt one member at a time (each member of
its request, its result, its receipt and its unsealed envelope, removed, and its value
replaced) and requires the same reasons from both for every change, and two oracles beside
them: a change inside the request, the result or the receipt is never valid, and a change to
the unsealed envelope, or a member added to the receipt, never changes the verdict.

A change of one member is caught by the seal before any rule of a job's form is read, so
it cannot hold the two verifiers to those rules. The rules stage does: for each rule of a
wasmQ job's form ([quantum-wasmq §6.5](../../extensions/quantum-wasmq.md#65-verifying)),
the genuine wasmQ jobs changed at the rule's bound, on both sides of it where it has two,
and sealed again with the demo key, each with the verdict written for it by hand from the
text (`rule_cases` in the differential). Both verifiers must give every case its written
verdict, so a rule dropped or a bound moved in either one fails: this stage, and the
manifest, are what back "the two verifiers agree" on the form's rules. `--second-only`
runs it for the second verifier. Each crafted wasmQ receipt that names one rule breaks that
rule alone: the reference states one problem for it, and the second verifier that rule.

The labelled stage gives both verifiers the second verifier's own hand-labelled wasmQ cases
(`receipt_verify.py --wasmq-cases`), each as its exact text: the labels its author wrote from
the text bind the reference as they bind the second verifier, so one labelled corpus holds
both.

[`../tools/wasmq_mutants.py`](../tools/wasmq_mutants.py) weakens each rule in each verifier,
from the code (each check dropped, each comparison moved by one, a count or a digest read
loosely, a null member read as absent and an absent one as null, the most of many read as the
least), and requires the
differential (`--wasmq-only --first`) to catch every weakening, counted per rule:

```sh
python3 -I tools/wasmq_mutants.py python --reference PATH/wai-quantum
python3 -I tools/wasmq_mutants.py rust-schemata ../wai-quantum/src/engine/wasmq.rs ../wai-quantum/src/engine/wasmq2.rs mutants.json  # in a scratch checkout
# build the command line from that checkout, then
python3 -I tools/wasmq_mutants.py rust --reference PATH/wai-quantum --mutants mutants.json
```

It also changes each number of the provider receipts to values past a double's whole numbers,
and sets a job's shots in both its request and its result, to see a limit one verifier has and
the other does not; and it seals those of the demo key again, so that each is judged by what it
says and not only by its digest.

`--plant NAME` runs the second verifier with a defect planted in it: a lenient key check,
`alg` unchecked, the last of a member named twice kept, inexact numbers let through, a
simulator's counts let pass as measured, a ceiling on every whole number, `R` of small order
let through, under a contract (§8.7) each route's outcome, the planner's choice or a
shadow's distance taken as it stands, a receipt's time taken as it stands with its digest read
as one that seals none, a key's window taken to hold its end, and a receipt that seals no time
placed in any window. The differential succeeds only when it catches the plant. That is the proof that
it can fail.

`--extra DIR` adds receipts a person holds and does not publish: both verifiers must find each
valid. A receipt from a cloud account's task names that account's number in its job id, and
the receipt seals it, so the corpus holds none: the shape of such a receipt is here
(`scripted-cloud-tasks-*`), and real ones are checked with `--extra`.

CI runs the whole differential beside the build of the command line
(`.github/workflows/wai-quantum-cli.yml`, job `cli-linux`), and the second verifier against
the manifest, with its plants, among the independent verifiers
(`.github/wai-conformance/verifiers/quantum-receipts.sh`).

## Making it again

```sh
bash receipts/make.sh PATH/wai-quantum receipts/jobs          # the command line's and the service's
(cd ../wai-quantum-qpu && WAI_QUANTUM_RECEIPT_CORPUS=$PWD/../quantum-conformance/receipts/jobs \
  cargo test --test clients -- every_built_in_kind a_built_in_kind_runs_under_a_contract) # the built-in kinds'
python3 -I receipts/generate.py                                 # the crafted half and the manifest
```

Making them again replaces receipts a release already judged, and `--check` then fails: add
receipts under new names, and keep the ones there. A new name is added to `MADE` in
`generate.py`; `generate.py --pin NAME` records its digest, and refuses a name it holds.