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weatherreporter/docs/internal/report-registry.md

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# Report Registry Internals
`internal/report` owns the in-process registry of report identities and the
resolution of a report's valid period. Command names and configuration aliases
belong to the [CLI reference](../cli.md) and [configuration
reference](../config.md), respectively.
## Registry And Resolution
`DefaultRegistry` supplies the maintained definitions. `Lookup` returns a
definition by its internal ID, while `Resolve` combines it with a request time,
location, and optional date to produce `Resolved`. The result carries the
definition, generation time, timezone, and resolved valid period; its metadata
and output-name helpers keep derived identity values consistent for callers.
Definitions carry the internal collaborators needed downstream: prompt and
template identity, module configuration, output naming, Distributor path
templates, and fixed batch eligibility. The external prompt contract is owned
by the [Promptkit integration guide](../integrations/promptkit.md), template
surface by the [report template guide](../templates.md), and published
Distributor paths by the [Distributor bundle guide](../integrations/distributor/pkg-bundle.md).
`WithModuleOverrides` returns an independently cloned registry with replacement
module configuration for recognized report IDs. The application owns batch
planning and data-dependent inclusion; see [app orchestration
internals](app-orchestration.md).
The registry never collects weather data, parses CLI flags, writes output,
executes Promptkit, or delivers a report.
## Verification
Focused tests protect retained report definitions, period resolution, Daily
run-ID disambiguation, and rejection of retired command or configuration names:
```sh
go test ./internal/report
```