nimmo/nixos-config
nimmo/nixos-config
Watch
1
0
Fork
You've already forked nixos-config
 0
Code Issues 15 Pull requests Wiki Activity Actions
Page: 20 Architecture Decisions
Pages
00 Documentation Map and Scope 00 Documentation Standards 00 Start Here and Governance 10 System Atlas 11 Fleet Overview 12 Host Inventory 13 Service Catalogue 14 Network and Access Topology 15 Storage and Data Map 16 Automation and Control Plane 20 Architecture Decisions 21 ADR 001 Electra Hardware Specialisations 22 ADR 002 Workload Placement 23 ADR 003 Network Exposure 23 Project Tracking 24 ADR 004 Engram Durable Agent Memory 24 Security Baseline 25 ADR 005 Auto Update Control Plane 26 ADR 006 Scoped Secret Files 30 Operations and Runbooks 31 Routine Fleet Operations 32 Safe Testing and Deployment 33 Host Provisioning 34 Monitoring and Service Investigation 35 Backup Verification and Partial Restore 36 Full Host Recovery 37 Electra Boot Trust Recovery 38 Secret Editing and Recipient Rotation 39 Auto Update Incident Response 39a Service Migration and Cutover 39b Wrapper Repository Packaging 40 Engineering Handbook 41 Repository Structure and Import Chain 42 Configuration Ownership Boundaries 43 Adding Packages and Flake Inputs 44 Adding a Module or Profile 45 Adding a Host 46 Adding or Migrating a Service 47 Testing and CI Contracts 48 Secrets Implementation Conventions 49 Documentation Maintenance 50 NixOS Learning Path 51 Guided Repository Tour 52 Nix Language Essentials 53 Declarative Configuration Store and Generations 54 Flakes and Inputs 55 NixOS Modules and Option Merging 56 SpecialArgs and Home Manager Argument Flow 57 Electra Specialisations Worked Example 58 Nix Troubleshooting Primer 90 Historical Material 91 Electra Secure Boot Hardening Record Home
8 20 Architecture Decisions
Nimmo edited this page 2026-09-12 17:06:19 +01:00
Table of contents

Architecture Decisions

  • Type: Index
  • Status: Current
  • Scope: Fleet and repository architecture
  • Canonical sources: Repository history, completed Forgejo issues, current implementation, and verified project memories
  • Last verified: Source commit 556df88494686003b1c4f20c8e0b99b5afc16a6e (2026-09-12)
  • Review triggers: Acceptance, supersession, or discovery of a consequential architectural decision

Architecture Decision Records preserve why consequential choices were made, which alternatives were rejected, and which constraints follow. They do not replace current-state reference or operating procedures.

Decision register

ADR Decision Status Supersession
ADR-001 Electra hardware-presence specialisations and the single-generation model Accepted None
ADR-002 Workload placement among native NixOS services, containers, and wrapper repositories Accepted None
ADR-003 Network exposure, loopback binding, mesh access, and relay/ingress topology Accepted None
ADR-004 Engram as durable cross-session agent memory Accepted None
ADR-005 Auto-update as a fleet reliability and control-plane system Accepted None
ADR-006 Service- and host-scoped secrets instead of a monolithic encrypted file Accepted with transitional exceptions None

The initial register was reconstructed under issue #221. Current implementation remains authoritative for what exists; an ADR owns only the rationale, constraints, and consequences of the choice.