A list that stops at its own take and says nothing lets the last row read
as the oldest there is. Capped lists now fetch one row past the limit and
answer meta.truncated and meta.limit on the success envelope, so data keeps
its shape. Applied to the capped lists without a total count: rhythm
events, ECG recordings, sharing grants and activity, illness episodes, side
effects, personal records, security activity, cycles, family history,
allergies and mental-health assessments. The activity feed no longer
reports a list that is exactly full as cut.
The batch endpoints have been capped at 60 calls a minute since they
were written. The per-record siblings a naive or older client loops
over — the measurement create, the mood entry, both medication-intake
writes, a lab result, a custom-metric entry, a cycle day-log, a
vaccination, an allergy, a biomarker and an encounter — had no ceiling
at all. That is backwards from the risk: the batch endpoint is the one
a well-behaved client uses, and the unlimited path is the one a broken
loop finds.
All eleven share one generous per-account bucket, `record-write`, at
300 requests a minute. Five writes a second sustained for a full minute
is beyond any hand-driven session and any sync burst, and every one of
these routes is already wrapped in `withIdempotency`, so an honest
retry storm is deduplicated before it is counted — the bucket exists to
cut off the pathological loop, not to shape traffic. It keys on the
ACTING account, the precedent the delegable medication routes set, so a
delegate burns their own allowance rather than locking the record's
owner out of their own log.
The eleven operations publish the bucket name and the cap instead of
the generic refusal, on the shared 429 that already declares
`Retry-After` and the rate-limit triple. A test pulls the key and the
window out of the query the limiter runs and holds the published
sentence to them, so the paragraph cannot drift away from the bucket it
describes.
`.meta()` clones the schema in Zod 4 and registers the clone, so a bare
`schema.meta({ id, description })` statement registers nothing at all.
Forty-one of them sat across nine route modules. The ids they named —
`MeasurementType`, `MeasurementSource`, `LoginPasswordRequest`,
`CreateMeasurementRequest`, `CreateBatchWorkoutRequest` and thirty more —
reached `components.schemas` zero times, the descriptions written for them
were published nowhere, and every use site inlined an anonymous copy. A client
generated from the contract got duplicated nameless types where one named
model belongs, which is the part that matters, because the iOS client is why
the contract is published.
Forty of them now bind their clone, and every use site points at it. Where the
schema comes from `src/lib/validations/*` the import is aliased and the clone
takes the name the use sites already spell, so nothing mutates the runtime
validation schema. The seven that cross module boundaries are exported from
`./shared` and the eight consumers import them from there; importing the raw
schema from the validation module instead is exactly what inlined them.
Thirty-four named components appear where inline copies stood. Fully
dereferenced, the document differs by eighty-six added descriptions and
nothing else: no operation's request or response shape moves. `CoachPrefs`
was already force-registered in the index and finally carries its description.
Five ids legitimately stay out of `components.schemas` —
`ListMeasurementsQuery`, `ListAllergiesQuery`, `ListEncountersQuery`,
`SuggestEncounterQuery` and `ListPractitionersQuery`. The emitter expands a
`requestParams.query` object into inline `parameters`, so a query id has
nowhere to land; they stay in the assigning form for consistency.
Three findings the wiring turned up:
`CreateShareLinkRequest` and `HealthRecordExportRequest` were annotated in the
Coach module, which imported the two schemas for no other reason and never
referenced them. Both operations that send these bodies live in the
health-record module, so the annotations move there. Both descriptions
described a `sections` field: the export body has no such field and rejects it
with a 422, and the share-link body freezes scope through `selection` plus
`documentIds` / `documentOnly`. Publishing either sentence verbatim would have
published a lie, so both are corrected to the shape the routes actually take.
`CoachPlansListQuery` — the forty-first — named a component that nothing
referenced and that a query object could never reach. The operation publishes
its two parameters by hand, because the schema carries a cross-field
refinement the expansion cannot express, and every clause of the annotation is
already published on the operation and on both parameters. It is deleted
rather than left registering nothing.
`withIdempotency` has made writes safe to retry since v1.5.x. It was described
in route comments and in no schema, so an app generated against
`docs/api/openapi.yaml` could not learn that a retry was safe. The iOS side
asked for it; the mechanism does not change, only what it says about itself.
34 operations now declare `Idempotency-Key` and the `X-Idempotent-Replay`
header, plus the 409 that refuses a duplicate still in flight. The description
leads with the one silent failure in the mechanism: a key that misses
`^[A-Za-z0-9_\-:.]{8,128}$` is IGNORED rather than refused, so the write
proceeds unprotected and looks exactly like a request that carried no key.
## What the work turned up
Three things the contract had wrong or missing, none of them the thing being
built:
- `/api/insights/chat` describes `withIdempotency()` in its header comment and
applies it nowhere. The Coach chat is not retry-safe. Its prose says it is.
- `/api/measurements` exports GET, POST, PUT and DELETE and wraps only POST.
Publishing the header per PATH would have promised a safe retry on two
methods that do not honour one — the dangerous direction, so the guard works
per OPERATION.
- `/api/insights/feedback` and `/api/admin/backups/{id}/restore` are not in the
document at all. Both are named in the guard's exemption list with a reason,
not filtered out silently.
## The guard
`idempotency-contract-publication.test.ts` reads the expected set out of the
route tree on every run — nothing is hand-listed, so it cannot fall behind the
code. It fails in both directions: a new wrapped route that forgets to publish,
and a published claim no handler honours.
A fourth assertion checks the exemption list itself is still true. It earned
its place immediately: the first draft exempted the whole `/api/medications`
family on the strength of a grep for path literals that came back empty. The
paths are not written as literals there; the emitted document carries 19 of
them. The test went red, the claim was wrong, the list is two entries now.
Measure the artefact, not the source that builds it.
Every route that resolves a record through the sharing fence can answer 403
`sharing.access.denied`, and until now that fact was published on the selector
header and on none of the 120 operations that produce it. All 120 carry it now,
byte for byte, from one constant: the refusal is deliberately indistinguishable
across a missing account, a missing grant, a scope that does not reach the
surface and a read grant on a write, so 120 paraphrases would invite a client to
tell apart what the server refuses to.
Where a delegable route already answered 403 for its own reason — a module
gate, the cycle gate, AI consent — the two share one description rather than one
of them going unpublished, since OpenAPI allows a single response per status.
The guard recomputes the delegable set from the route sources on every run and
classifies per verb, which matters: seventeen modules have a delegable read
beside a write that refuses a switch outright.
Add the `/api/allergies` and `/api/family-history` endpoints (list / create /
read / update / soft-delete), each wrapped in `apiHandler` with Zod
`safeParse` + `returnAllZodIssues`. `userId` is always narrowed from the
session/Bearer — never a body field — and the Prisma `data` is built
field-by-field (no mass assignment). Creates wrap in `withIdempotency`. The
free-text reaction/note are encrypted before write and decrypted fail-soft on
read via the server-authoritative DTOs.
Register the query-key factory entries and the OpenAPI route tables (new
`Records` tag); regenerate `docs/api/openapi.yaml`.
Marc-André Bombeck