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narratio/docs/integrations/notarius.md

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# Notarius Integration Contract
## Boundary
Narratio uses Notarius as a subprocess to extract configured structured JSON
lanes from the final trimmed Seriatim transcript. Narratio owns invocation,
safe bundle discovery, lane selection, and its own artifact metadata. Notarius
owns pipeline definitions, lane schemas, the receipt, and bundle formats.
Canonical Notarius references:
- [Subprocess consumer contract](https://gitea.maximumdirect.net/eric/notarius/src/branch/main/docs/consumers/subprocess.md)
- [D&D pipeline and lane contracts](https://gitea.maximumdirect.net/eric/notarius/src/branch/main/docs/consumers/dnd-pipeline.md)
- [Run-result receipt](https://gitea.maximumdirect.net/eric/notarius/src/branch/main/docs/integrations/run-result.md)
- [JSON output bundle](https://gitea.maximumdirect.net/eric/notarius/src/branch/main/docs/integrations/json-output.md)
The [complete Narratio example](../../examples/pipeline.full.annotated.yml)
records the exact current constraints for all ten D&D lanes. Treat the linked
Notarius documents as canonical when changing those values; Narratio does not
duplicate the complete schemas.
## Invocation
When `pipeline.notarius.enabled` is true, Narratio resolves the executable,
configuration path, input path, output directory, and working directory to
absolute paths and invokes:
```text
notarius run <pipeline_id> --config <config_path> --input <trimmed_json> --output-dir <staging_dir> --json
```
Standard output is reserved for the JSON receipt. Standard error is captured
separately as diagnostic output. Narratio applies the configured timeout and
does not interpret stdout as a receipt unless the subprocess exits successfully.
It does not pass a Narratio session ID or run `notarius config validate`
automatically; the configured working directory and Narratio's minimal child
environment apply to the subprocess.
## Accepted Result
Narratio currently accepts receipt schema `notarius.run-result.v1`. The receipt
must identify the configured pipeline, and its `index_file` must be exactly
`index.json` beneath the reported bundle root. The production index must name
the management files exactly as `manifest.json`, `rejected.json`, and
`warnings.json`. All receipt, index, and lane paths must stay inside that
bundle; symlinks and non-regular lane payloads are rejected.
Supported receipt and index shapes tolerate unknown fields for forward
compatibility, while required identity, validation, count, manifest,
rejection, warning, and lane-list fields remain mandatory. Narratio applies
bounded reads to the receipt, index, rejection, and warning documents. Optional
chunk-map and evidence-context descriptors must carry their complete generic
contract metadata when present.
For every entry in `pipeline.notarius.outputs`, Narratio requires exactly one
index descriptor with the configured lane ID, media type, schema ID, schema
version, and, when configured, module key. Missing, duplicate, rejected, or
incompatible required lanes fail extraction even if Notarius exited zero.
Unconfigured lanes may remain in the preserved bundle but do not become
selectable Narratio sources.
Each accepted configured lane is registered as
`narratio.extraction.<output_key>`. The bundle index is retained for audit and
resume validation but is not selectable. Scriptorium and publish rules consume
only explicitly named lane sources; `--artifacts` never selects Notarius lanes.
## Failure And Compatibility Behavior
- Startup and nonzero-exit errors fail extraction and retain captured diagnostics.
- Invalid receipt JSON or an unsupported receipt schema fails before bundle use.
- Unsafe or incompatible index data and required-lane rejection fail before the
staged bundle is promoted to durable storage.
- Contract and external provenance metadata are preserved on lane artifact
records and through explicit publication.
Rejection and warning summaries retain structured stage, scope, lane, and
reason-code fields for diagnostics without exposing free-form external messages
or reading lane payload bodies.
Configuration fields and defaults are in [Configuration](../config.md).
Operator paths, rerun procedures, and bundle retention are in
[Operations](../operations.md). See [Troubleshooting](../troubleshooting.md)
for failure recovery.