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narratio/docs/internal/integration-scriptorium.md

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# Integration: scriptorium
## Purpose
Define Narratio's adapter contract for Scriptorium artifact generation and render-debug subprocess invocations.
## Inputs and Outputs
Inputs:
- `RunArtifactRequest`: binary, config path, prompt/profile IDs, input map, vars map, timeout, output path, logs/config paths, optional API env and working dir
- `RenderArtifactRequest`: same core fields for render mode
Outputs (`ArtifactResult`):
- output path
- stdout/stderr log paths
- generated config path
- exit code and duration
- command mode (`run` or `render`)
- prompt/profile provenance
- validation failure signal
- adapter metadata
## Boundaries
Owns:
- Deterministic CLI arg construction for `scriptorium run` and `scriptorium render`
- Common request validation
- Invocation config emission
- Output existence/non-empty checks
- Validation-failure mapping for run exit code 2
Does not own:
- Artifact selection policy (`analyze` stage)
- Bounds semantic validation (`trim` stage)
## Config Fields Used
Via `pipeline.scriptorium.*` and stage-level artifact config:
- `binary`, `config_path`, `timeout`, `render_debug`
- artifact-level `prompt_id`, `profile_id`, `timeout`, `inputs`, `vars`, `output_path`
## External Adapters Used
- Shared subprocess helper (`internal/adapters/subprocess`).
## State and Manifest Behavior
- No direct manifest writes.
- Stage metadata records adapter outputs and command mode.
- Generated invocation YAML is written when requested.
## Skip and Resume Behavior
- Adapter has no skip/resume logic. Stage/runner controls execution.
## Failure Behavior
- Request validation fails for missing binary/prompt/output, invalid timeout, invalid input/var names, or missing required API env var.
- Subprocess errors bubble with command context.
- `run` exit code 2 is treated as `ValidationFailed=true` and surfaced as error by calling stage.
- Successful subprocess still fails if output file is missing/empty.
## Tests to Inspect Before Changing
- `internal/adapters/scriptorium/subprocess_test.go`
- `internal/adapters/scriptorium/fake_test.go`
- `internal/stage/analyze_test.go`
- `internal/stage/trim_test.go`
## Architectural Invariants
- Both modes require explicit timeout > 0.
- Input/var maps are sorted into deterministic CLI argument order.
- Run-mode validation failures are represented explicitly, not silently skipped.