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hq/04-ISSUES/166-a-requirement-cannot-be-optional/00-report.md
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jochen daa9f171ae
mesh/merge-gate pass: the change touches no module of the mesh's graph
mesh/repo-check pass: its merge-check.sh passed
mesh/delivery delivered
Issue reports carry only opened: the tracker holds every status, so no copy can drift
The import of slice 3 (ADR 0275) was checked against every folder: no report changed since the
commit it read, and the tracker holds each report's status, owner, fix, design amendment, replay
and closing day. The keys are removed from all 361 reports, cycle.py refuses them in any report,
and the playbooks, skills and READMEs that still pointed at them name the tracker instead.
2026-10-10 17:44:18 +02:00

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opened: 2026-09-30
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# 166 — A requirement cannot be optional
## What was observed
Making every dependency on ace a provision turned soft dependencies into hard ones. grafana now
requires `influxdb-api` (a data source), ombi requires `sonarr-api`, `radarr-api` and `lidarr-api`,
home-assistant requires the Servarr APIs and `mqtt-topic`. Each is optional to the software — grafana
runs without a data source, ombi without lidarr — but a mesh without influxdb cannot assign grafana at
all, and a mesh without lidarr cannot run ombi.
## What would be right
A requirement a module can run without: resolved and bound when a provider exists, absent (with its
`${bound:…}` placeholders refused or defaulted explicitly, never rendered empty) when none does — so
the module description stays true on every mesh.
Re-checked 2026-10-08: still holds. A manifest's `requires` is still a list of hard requirements; no
optional form exists in the controller's catalogue.