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T01 docs/tenancy-posture.md - vector set per service rather than one repo vector, with the provider-versus-consumer finding routed to net-kingdom. T02/T03/T06 docs/placement-policy.md - accepts placement ownership scoped to rule-here/number-there, records a placement owner per workload, reports the latency-critical + batch co-residency on platform-pg, marks the connection-ceiling trigger unmonitored pending railiance-telemetry, and answers the retention floor/ceiling question. T04 s3-consumer-interfaces 1.1.0 - quota disclosure per SS10.2. Surfaces that apps-pg has no backup, no resource limits and no tuned parameters. T05 docs/adr/ created with a mandatory-frontmatter convention and the first three ADRs. This repo previously held none. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
67 lines
2.9 KiB
Markdown
67 lines
2.9 KiB
Markdown
---
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title: "ADR-0003 — Decisions that bind others live in docs/adr, not only in the State Hub"
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status: accepted
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revision: "1.0"
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owner: railiance-platform
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date: "2026-08-17"
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last_reviewed: "2026-08-17"
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review_interval: 12m
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---
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# ADR-0003 — Decisions that bind others live in `docs/adr`, not only in the State Hub
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## Context
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This repo recorded decisions with the State Hub's `record_decision()` and wrote
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governing content as prose in `docs/` — 24 files on 2026-08-17, none carrying a
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status, owner, revision or review date. It held no ADRs at all.
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Two things made that a defect rather than a style.
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**The hub is a read model.** The estate's standing rule is that local files are
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the source of truth and the hub reflects them. A decision that exists only as a
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hub record inverts that for the one class of content where it matters most.
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**`policy-nexus` publishes canon and ADRs only**, globbing `docs/adr/*.md` from
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each repo. A repo with no ADRs is invisible to the estate's publication surface
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no matter how much governing content it holds. This repo owns S3 boundary
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rules, the credential-lane model and the consumption-mode gate — all binding on
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other repos, all unpublishable.
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The gap was structural, not an oversight: nothing in the session protocol ever
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told anyone to write an ADR here.
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## Decision
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**A decision that binds anyone outside this repo is recorded as an ADR in
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`docs/adr/`, with the frontmatter in `docs/adr/README.md`, before or alongside
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any hub record.** The hub record points at the ADR; it does not replace it.
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Runbooks and procedures stay as prose in `docs/` and stay unpublished. The test
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is not importance — several runbooks are critical — but whether the document
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*decides* something for someone else.
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## Consequences
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- `docs/adr/` exists, with a convention, a template and this repo's first three
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ADRs.
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- Existing prose is not converted wholesale. Content is promoted when it is
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next touched, or when a consumer needs to cite it.
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- `last_reviewed` and `review_interval` are mandatory here, which is stricter
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than the estate norm — of 69 ADRs across 19 repos on 2026-08-17, 21 had YAML
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frontmatter and 2 had any notion of a review date. `POLICY-NEXUS-WP-0001` T05
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cannot compute staleness without those fields and must not invent them, since
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inventing them would make the publication a second source of truth, which is
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that workplan's own top risk. Routed as `RPF-WP-0018` finding F5.
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- Session protocol guidance should follow, so the next agent writes an ADR
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without being told. Not done in this ADR.
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## Alternatives considered
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**Keep decisions in the hub and have `policy-nexus` read it.** Rejected on
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both sides: it would make a read model authoritative, and it would give the
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publication surface a source that no repo can diff or review.
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**Add frontmatter to all 24 existing `docs/` files.** Rejected. Most are
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runbooks that should not be published, and stamping them with a status would
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assert a decision that was never made.
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