Align internal documentation and maintained examples

docs/internal/stage-analyze.md

@@ -1,24 +1,29 @@
 # Stage: analyze
 
 ## Purpose
+
 Execute selected configured Scriptorium artifacts in dependency order and materialize outputs.
 
 ## Inputs
+
 - configured artifacts from `pipeline.scriptorium.artifacts`
-- optional selected artifact filter (`--artifacts`)
+- optional selected artifact keys supplied through the stage environment
 - built-in/configured/previous-session source references in artifact inputs
 
 Supported source families:
 - built-ins: `narratio.transcript.*`, `narratio.bounds.session`
-- prepared stable inputs: `narratio.input.players`, `narratio.input.party`, `narratio.input.glossary`
+- prepared stable inputs: `narratio.input.players`, `narratio.input.party`,
+  `narratio.input.glossary`
 - configured artifacts: `narratio.artifact.<key>`
 - previous-session cache: `narratio.previous_session.artifact.<key>`
 
 ## Outputs
+
 - one materialized output per executed configured artifact (`output_path`)
 - stage metadata describing selected/generated/reused artifacts
 
 ## Key Behavior
+
 - skips with metadata when Scriptorium config is missing or no executable artifacts remain.
 - builds runtime artifact catalog (built-ins + configured artifacts).
 - marks non-executable configured artifacts as reusable when output files already exist.
@@ -30,13 +35,26 @@ Supported source families:
 - validates non-empty output files and materializes canonical outputs.
 
 ## Failure Semantics
+
 - required missing configured/previous-session inputs fail.
 - missing required prepared stable input source includes prepare rerun guidance.
 - missing required previous-session source includes prepare rerun guidance.
-- missing required `narratio.transcript.final_markdown` or `narratio.transcript.final_trimmed_markdown` inputs includes render rerun guidance.
+- missing required `narratio.transcript.final_markdown` or
+  `narratio.transcript.final_trimmed_markdown` inputs includes render rerun
+  guidance.
 - dependency cycles or unavailable required dependencies fail.
 - adapter validation failures fail stage.
 
 ## Invariants
+
 - `analyze` performs no remote storage calls for previous-session source resolution.
 - output provenance and metadata are deterministic per execution.
+
+## Related Contracts And Tests
+
+- [Configuration](../config.md#scriptorium-artifact-entries) owns artifact
+  fields and source-selection rules.
+- [CLI](../cli.md) owns user-visible artifact selection.
+- [Scriptorium](../integrations/scriptorium.md) owns the subprocess contract.
+- Implementation and tests: `internal/stage/analyze.go`,
+  `internal/stage/analyze_test.go`