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Merge pull request 'Proposed: ADR 0293, an ask the controller made is delivered again to its seat's worker (issue 334)' (#310) from decisions/334-the-controllers-own-ask-is-delivered-again into main

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This commit was merged in pull request #310.
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mesh-admin
2026-10-11 02:36:25 +00:00
parent d1edcf544b f9677dabea
commit 331e8d0bbe
3 changed files with 119 additions and 2 deletions
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03-DESIGN/01-to-be/45-a-core-that-cannot-fail-silently.md
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@@ -2,8 +2,9 @@
layer: to-be
status: in-progress
code: [mesh-controller, mesh-host, mesh-tools, mesh-catalog, mesh-sdk, mesh-lab]
updated: 2026-10-10
updated: 2026-10-11
decisions:
- 02-DECISIONS/0293-an-ask-the-controller-made-is-delivered-again-to-its-seats-worker-and-every-other-ask-is-only-dropped.md
- 02-DECISIONS/0289-the-controller-mirrors-its-records-into-buckets-written-only-on-a-change-and-audited-against-its-store.md
- 02-DECISIONS/0285-an-issue-tracks-a-condition-by-its-key-and-every-message-about-the-condition-says-the-issue-and-where-it-stands.md
- 02-DECISIONS/0276-merges-are-assembled-in-a-rolling-window-and-each-batch-is-delivered-by-one-walk-with-one-commit-per-repository.md
@@ -95,7 +96,7 @@ Every kind of state the core keeps, and the one component that writes it. Anyone
| a machine's declared data: what it measured, what is retired, what was deleted (ADR 0233) | controller, from what each `node-backup` holder answers | the controller's store, `data_item` and `data_reading` | the holder measures and says; it records nothing the controller keeps |
| the facts snapshot | controller | the artifact store, `facts/latest` | the build seat reads |
| the record mirrors: nodes, assignments, walks, builds, settings ([ADR 0289](../../02-DECISIONS/0289-the-controller-mirrors-its-records-into-buckets-written-only-on-a-change-and-audited-against-its-store.md), *added 2026-10-10*) | controller (lease holder), after each change commits in its store, only when the value differs | key-value `mesh-controller_nodes`, `_assignments`, `_walks`, `_builds`, `_settings`; one event per write | read through `reads` (ADR 0201); D17 compares them with the store; the controller never reads them to decide ([to-be 54](54-the-controllers-records-on-the-bus.md)) |
| a message a consumer gave up on (ADR 0264) | controller, from the server's maximum-deliveries notice | the bus, the stream `DEAD_LETTERS` | read, delivered again or dropped through the controller's `dead-letters` verb, with why |
| a message a consumer gave up on (ADR 0264) | controller, from the server's maximum-deliveries notice | the bus, the stream `DEAD_LETTERS` | read, delivered again or dropped through the controller's `dead-letters` verb, with why; an ask is delivered again only when the controller made it itself, every other ask is only dropped (ADR 0293) |
A bus subject two components may publish on is refused when the controller composes grants, unless
this table marks it shared. Changing a writer is a change to this table, through a decision.