notarius/docs/integrations/dnd-spell-artifacts.md

# D&D Spell Artifact

This document is the durable serialized artifact contract for the production
D&D spell extractor. Selectable extractor keys are cataloged in
[Configuration](../config.md#implemented-production-modules).

## Identity

- Artifact kind: `dnd/spell-list`
- Prompt ID: `dnd.spells`
- Response schema key: `dnd_spells`
- Response schema ID: `notarius.dnd.spells`
- Response schema name: `notarius_dnd_spells_v1`
- Response schema version: `v1`
- Media type: `application/json`

The durable JSON Schema is owned by the D&D spell artifact codec. The
extractor's private LLM response schema is a separate transport contract: its
source-reference objects omit `source_id`, which the extractor assigns while
mapping the response to the canonical artifact. The LLM DTO and transport
schema are not part of this durable contract.

The output contains canonical spell casts derived from transcript evidence.
Source IDs are assigned from the input identity; source-unit ranges identify
the evidence location.

## Output Shape

The extractor payload is a JSON object with one required top-level array. Its
structure is:

```text
{"spell_casts": [<spell-cast object>, ...]}
```

`spell_casts` must be present. It may be empty when no spell casts are found.
When multiple chunk results are combined, spell casts remain in chunk order.
When the payload is written as durable output, its logical path is derived from
the configured artifact lane ID as defined by the
[JSON output contract](json-output.md#output-payload-files).

## Spell-Cast Fields

Each spell cast contains exactly these required fields:

- `caster`: in-world character or creature casting the spell;
- `spell`: spell name;
- `effect`: concise spell effect in the scene;
- `narrative_description`: short description of the spell cast in context;
- `source_refs`: transcript source references with extractor-assigned source
  IDs and evidence unit ranges. It must contain at least one entry.

All four string fields must be non-empty. `caster` is the canonical in-world
caster, not the human player, transcript speaker, or GM when the associated
character or creature can be identified. Player and party references may
disambiguate that identity, but do not independently establish that a cast
occurred. The `spell` value must resolve through the effective SRD-plus-overlay
catalog as either a canonical name or alias. Catalog validation accepts aliases
but does not rewrite them; unknown fields are rejected.

`effect` and `narrative_description` record the casting declaration and its
immediate resolution as established by the transcript. They do not follow
summoned creatures, persistent spell effects, or other downstream consequences
through the rest of the scene. They also do not correct the table from
published D&D rules or supplement the transcript with model knowledge. When the
transcript contains a nonstandard or disputed ruling, the artifact may preserve
the immediate observed resolution and attribute relevant reasoning to the GM or
table; it must not present that reasoning as a universal game rule. The spell
catalog is name-recognition policy, not evidence for spell mechanics or
outcomes.

## Source References

Each source reference contains exactly three required fields: `source_id`,
`start_unit_id`, and `end_unit_id`. The source ID must match the input identity.
The unit IDs must be positive integers present in the input, and the start unit
must not appear after the end unit. Unknown fields are rejected.

For each cast, the complete `source_refs` collection identifies the transcript
evidence for every factual claim in `caster`, `spell`, `effect`, and
`narrative_description`. A cast declaration and its immediate resolution may be
cited with separate narrow ranges when intervening units are unrelated. A
reported target, roll, amount, condition, interruption, or immediate outcome
must be supported by the cited units; otherwise the artifact describes only the
supported attempt or declaration. Later behavior by summoned creatures,
recurring effects, and other downstream consequences are outside the cast
artifact's evidence scope. The deterministic validators establish that ranges
are structurally valid and that the spell name is related to cited text.
Semantic claim completeness is an extraction policy and remains subject to
evaluation rather than deterministic proof.

Reference slot keys and accepted file types are defined in
[Configuration](../config.md#implemented-production-modules). References are
supporting disambiguation material, not source evidence, and are not
addressable through `source_refs`.

## Optional NPC Grounding

The `dnd/spells` extractor accepts an optional `npcs` reference containing one
normalized NPC artifact as `application/json`, up to 1 MiB. Preparation uses
the approved NPC codec and identity policy to validate the file, re-encodes
canonical durable JSON, and supplies that JSON as a spell-owned prompt input.
It helps the model prefer canonical caster names and recognize aliases; it
does not establish that a spell was cast.

NPC source references may identify the run that produced the registry or any
other session. They remain registry provenance and are never copied into a
spell cast's `source_refs`; every spell evidence range must still identify the
current transcript. When the slot is absent, the prompt receives exactly
`{"npcs":[]}` and the run has no NPC reference provenance or NPC checkpoint
fingerprint.

## Normalization Behavior

When the `dnd/spells` normalizer is selected, each recognized spell name is
rewritten to the effective catalog's canonical display name. Lookup uses the
catalog's case-insensitive, whitespace-normalizing, apostrophe-normalizing, and
alias rules. Unknown names are preserved exactly for the normalize validators;
the normalizer does not guess or apply fuzzy matching.

Each cast's `source_refs` is copied, sorted by exact `source_id`,
`start_unit_id`, and `end_unit_id`, and stripped of exact structural
duplicates. Adjacent or overlapping ranges are not merged, and the normalizer
does not synthesize references or change their boundaries.

After those per-cast changes, duplicate identity requires the same canonical
spell name, the same caster after case folding and whitespace normalization,
and the same complete, non-empty set of source references valid for the source
document. Only the first occurrence is retained, in stable order. Its caster,
effect, narrative description, and canonical references are preserved without
prose merging or source union. Unknown names, empty or invalid evidence, and
casts with different evidence remain separate.

Mutation and duplicate decisions are returned through the normal warnings
surface. Warning scopes use the merged input index, such as `spell_casts[0]`,
so they remain meaningful even when a later duplicate is removed. The
normalizer uses these reason codes:

| Reason code | Meaning |
| --- | --- |
| `spell_name_canonicalized` | A catalog lookup replaced an input name with its canonical display name. |
| `spell_name_unresolved` | A name was not found in the effective catalog and was retained unchanged. |
| `source_references_normalized` | Reference order changed or exact duplicate references were removed. |
| `duplicate_spell_cast_collapsed` | A later cast matched the retained cast's complete duplicate identity. |

Only warnings from an accepted normalize attempt are promoted to
`warnings.json`. If an unresolved name reaches the default normalize validator
chain, the catalog validator rejects the candidate with `unknown_spell`; the
`spell_name_unresolved` warning remains in the attempt's debug artifact. An
explicit validator override that accepts the candidate promotes the unresolved
warning normally.

## Manifest Metadata

The extractor adds prompt and response-schema provenance under the artifact lane
manifest metadata:

```json
{
  "metadata": {
    "extractor": {
      "prompt_id": "dnd.spells",
      "prompt_version": "v1",
      "prompt_sha256": "sha256:...",
      "response_schema_key": "dnd_spells",
      "response_schema_id": "notarius.dnd.spells",
      "response_schema_name": "notarius_dnd_spells_v1",
      "response_schema_version": "v1",
      "response_schema_sha256": "sha256:...",
      "catalog_base_id": "dnd-5e-2014-srd-spells",
      "catalog_digest": "sha256:...",
      "catalog_overlay_ids": ["campaign.example"],
      "npc_registry_digest": "sha256:...",
      "npc_count": 3
    },
    "normalizer": {
      "catalog_base_id": "dnd-5e-2014-srd-spells",
      "catalog_digest": "sha256:...",
      "catalog_overlay_ids": ["campaign.example"]
    }
  }
}
```

`catalog_digest` identifies the effective semantic catalog, while
`catalog_overlay_ids` is sorted and empty for a base-only configuration. Raw
prompt, schema, catalog, alias, and local overlay-file content are not
included in manifest metadata. The `normalizer` metadata uses the same catalog
identity fields when that module is selected. Overlay origin, media type, byte
size, and raw digest are recorded separately in the manifest's reference
provenance; see the [JSON output contract](json-output.md#manifestjson).

The `npc_registry_digest` and `npc_count` fields in the example are present only
when the optional NPC registry is bound. They contain no NPC names, aliases,
source references, paths, or raw bytes.

The extractor's prompt hash, private response-schema hash, and effective catalog
digest also contribute independently scoped semantic checkpoint fingerprints.
Changing any of those prepared contracts intentionally produces a cold
checkpoint miss. Fingerprints contain only digests, never prompt, schema,
catalog, or reference content. When an NPC registry is bound, its semantic
digest contributes an additional local `npc_registry` fingerprint; the
manifest metadata contains only that digest and `npc_count`. Raw NPC file
provenance remains independently recorded in the manifest's `references` list.