Name ADR 0475 in design 60, now its number is reserved
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@@ -8,6 +8,7 @@ decisions:
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- "ADR 0467"
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- "ADR 0468"
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- "ADR 0474"
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- "ADR 0475"
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---
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# 60 — The brother module
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@@ -19,7 +20,7 @@ one call, reads the device's state and its admin pages, restarts it, and changes
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where a mistake cannot lock the operator out or open the device. Only the module's device process ever holds the
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device's admin password or the bucket's key.**
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(ADR 0464 and ADR 0467 are in force. Proposed, and not in force: ADR 0468 for the device process, the bucket and
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the parts; ADR NNNN for the feeder, multi-page and several-document scans and the one-call print; ADR 0474 for
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the parts; ADR 0475 for the feeder, multi-page and several-document scans and the one-call print; ADR 0474 for
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reading every page, configuring, the refused pages and the restart.)
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**Acceptance.** The operator, or an agent through the mesh MCP server, scans a document from the glass and finds it
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@@ -68,22 +69,22 @@ fingerprint is refused and nothing is sent.
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## 2. Scanning
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What ADR 0464 decided is the glass, one page, one PDF page. ADR NNNN (proposed) widens it to the feeder, to several
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What ADR 0464 decided is the glass, one page, one PDF page. ADR 0475 (proposed) widens it to the feeder, to several
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documents on the glass and to documents of several scans; until it is accepted, only ADR 0464 holds.
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- **The glass.** One page over the whole glass. The document lies on the lid, which is a white of its own, so the
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module measures the lid where no document lies and cuts the document out of it with a small margin. When it finds
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no document, or one that fills the glass, it keeps the whole page and says it did not crop (ADR 0464 §3).
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- **Several documents on the glass** (ADR NNNN, proposed). Documents lying apart on the glass are each cut out and
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- **Several documents on the glass** (ADR 0475, proposed). Documents lying apart on the glass are each cut out and
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filed as a PDF of their own.
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- **One document of several glass scans** (ADR NNNN, proposed). A caller starts a document, adds a glass scan to it
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- **One document of several glass scans** (ADR 0475, proposed). A caller starts a document, adds a glass scan to it
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as often as it needs, and finishes it, and the pages become one PDF. A document left unfinished is filed whole
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after 30 minutes, so no scan is lost.
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- **The feeder** (ADR NNNN, proposed). The feeder scans whole sheets, one side or both, and every page of the run
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- **The feeder** (ADR 0475, proposed). The feeder scans whole sheets, one side or both, and every page of the run
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goes into one PDF, in the order the scanner gave them: one object in the bucket and one announcement, with its
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page count. A feeder page is never cropped. A run that is cut off before its end is an error, never a short PDF
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said as success; a unit test checks it.
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- **A long run** (ADR NNNN, proposed). A feeder run may take longer than a call through the mesh MCP server may
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- **A long run** (ADR 0475, proposed). A feeder run may take longer than a call through the mesh MCP server may
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wait. Such a call answers that the scan started, with an id, and the caller reads its outcome by that id. A scan
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that was announced is always filed.
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- **The real resolution.** The module reads the resolution from the image it receives, never from what it asked: a
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@@ -99,7 +100,7 @@ is the evidence.
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## 3. Printing
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A caller prints in one call: `printer.print` takes a kept scan by its key, a document it has uploaded, or a file
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under the operator's home folder, which the verb uploads and prints in the same call (the file: ADR NNNN, proposed);
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under the operator's home folder, which the verb uploads and prints in the same call (the file: ADR 0475, proposed);
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with the copies, the sides and the paper. The device process fetches the document from the bucket and sends it to the printer
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in a format the printer itself lists as accepted, read before the job; a document in another format is refused with
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the printer's list (ADR 0468 §5). A document larger than one bus message travels in parts, each under the bus's
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@@ -166,7 +167,7 @@ Configure changes the device's pages and never the module's config (ADR 0474, pr
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## 6. Health
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The device process's health is its unit. The module's health, as ADR NNNN proposes, compares the certificates the
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The device process's health is its unit. The module's health, as ADR 0475 proposes, compares the certificates the
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printer serves, without a login, with the pinned one, and is unhealthy, naming the new fingerprint, when the printer
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serves one that is not pinned; a printer that does not answer is healthy with a note, and with no printer address set
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the module waits for that setting. Until that is accepted, a changed certificate shows only when a verb is refused. A certificate the device
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@@ -182,4 +183,4 @@ missing page and expects the error.
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document travels through a signed link to the bucket instead, and only its key crosses the bus.
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- **Restart is not built yet.** `printer.restart` is decided (ADR 0467 §5) and follows `printer.configure`.
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- **Not built yet either:** several documents on the glass, a document of several glass scans, the long run's id
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and the print of a file (ADR NNNN, proposed).
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and the print of a file (ADR 0475, proposed).
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