Files
hq/03-DESIGN/01-to-be
jschoubben 2baf22ac43 A pair is a module and a provider, not two machines
Amends the credentials page, which said "every pair has its own
credential" and meant two machines. Built that way, it was wrong in a
way that only shows on a real node: a machine running several services
against one database server had one credential between them, so the
provider refused to plan at all and the consuming node quietly gave the
first module a credential and the rest nothing.

The page already argues the case against itself — one credential with
many holders is the first of the three faults it was written to remove.
It just drew the boundary at the machine.

Two modules on one node are as separate as two on different nodes, and
one login opening both is what this page exists to prevent. It is also
what makes withdrawal possible: one role per machine cannot say that
this module has lost its login and the others still have theirs.
2026-09-01 02:46:37 +02:00
..

03-DESIGN / 01-to-be

The mesh being built toward. Every statement here traces to a record in 02-DECISIONS/; nothing arrives by drafting.

A document here describes an intention. What currently runs is in 00-as-is/, and the two are never merged — when something ships, the as-is document is written and this one's status becomes implemented.

Document Covers Rests on
00-work-breakdown.md How modules move across one at a time, until the old registry can be switched off ADR 0001, ADR 0016
01-end-to-end-testing.md The lab: a real mesh a change can be run against before it reaches nodes ADR 0016, 0029
02-scenario-declaration.md What a scenario declares — the underlay, and what to place on it ADR 0016
03-scenario-lifecycle.md What happens to a scenario — raise, snapshot, restore, move, destroy ADR 0016
04-lab-installation.md Getting the lab onto a clean machine, and why it verifies capability rather than installation ADR 0010
05-the-node-host.md Tier 0 — the one thing installed by hand, and the only thing that changes a machine ADR 0005
06-the-control-plane.md Tier 2 — what the term means, and the test for what belongs in it ADR 0005
07-the-substrate.md Tier 1 — what the control plane consumes and cannot grant itself ADR 0004, 0048
08-connectivity.md One context in full — overlay, resolution, exposure, filtering, certificates ADR 0007, 0050, 0051, 0055
09-the-node-lifecycle.md How a machine becomes a node, stays one, and stops being one ADR 0004, 0051
10-delivery.md Modules, the three edges, and how a change becomes a running thing ADR 0010, 0064, 0065
11-a-board.md What a person sees of the mesh, and why it is read from what runs ADR 0008, ADR 0001
12-a-module-repository.md A module repository, and what builds it ADR 0009, ADR 0010, ADR 0005
13-credentials-and-their-rotation.md Credentials, and moving them without a consumer holding one the provider does not know about ADR 0001, ADR 0009
14-model-access.md Model access as a provision, and what a licence is bound to ADR 0024, ADR 0009
15-the-agent-session.md One mechanism started twice — a node's session and the mesh's ADR 0004, ADR 0026
16-module-coverage.md What a module must be able to say, measured against 127 that exist ADR 0009, ADR 0005

Not yet written

  • The remaining six contexts. ADR 0006 settles the list at seven; connectivity is the first written in full (08) and the other six do not exist yet. The work breakdown says in what order they are needed.
  • Domain grouping outside the core. Not needed. ADR 0009 is superseded by ADR 0009: there is no domain module to group into, so there is no domain list to settle. Relationships are edges, and grouping is a tag and a query.