Add Daily prompt input preflight

docs/internal/prompt-input.md

@@ -0,0 +1,52 @@
+# Prompt Input Internals
+
+This document describes the implemented prompt input package boundary.
+
+## Purpose
+
+`internal/promptinput` converts a structured briefing package into the
+`data_package` JSON file passed to `scriptorium` prompts.
+
+## Inputs and Outputs
+
+Input:
+
+- `briefing.Package`
+
+Output:
+
+- `promptinput.Package` JSON with report metadata, briefing content, source
+  warnings, RunID, and an empty Recent Changes section.
+
+## Boundaries
+
+- This package owns the prompt input schema and required-field validation.
+- It does not fetch weather data, compute forecast summaries, compare prior
+  snapshots, or invoke `scriptorium`.
+
+## Behavior
+
+- `promptinput.Build` copies report metadata from the briefing package.
+- `promptinput.Validate` rejects missing or inconsistent required fields before
+  render preflight.
+- `promptinput.Save` writes JSON atomically where practical.
+- Recent Changes is present as an empty `items` list until structured comparison
+  is implemented.
+
+## Failure Behavior
+
+Validation errors name the missing or inconsistent field. Save failures include
+the filesystem operation and path context.
+
+## Tests
+
+Inspect:
+
+- `internal/promptinput/package_test.go`
+- `internal/app/app_test.go`
+
+## Invariants
+
+- Prompt input data remains structured JSON.
+- Briefing metadata and top-level report metadata must agree.
+- Recent Changes is not inferred from rendered report text.

docs/internal/scriptorium-adapter.md

@@ -0,0 +1,63 @@
+# Scriptorium Adapter Internals
+
+This document describes the implemented `scriptorium` subprocess adapter.
+
+## Purpose
+
+`internal/adapters/scriptorium` runs `scriptorium render` to preflight prompt
+wiring without LLM generation.
+
+## Inputs and Outputs
+
+Input:
+
+- prompt ID
+- prompt input data package path
+- configured binary, config path, profile, timeout, and extra arguments
+
+Output:
+
+- captured stdout
+- captured stderr
+- exit code
+- full argv used for inspection
+
+## Boundaries
+
+- This adapter owns `scriptorium` CLI flag construction and subprocess
+  execution.
+- It does not choose report types, build prompt input, fetch weather data, or
+  decide workflow order.
+
+## Behavior
+
+The render invocation shape is:
+
+```text
+scriptorium render --prompt <prompt_id> --input data_package=<path> --format json
+```
+
+Configured `--config` and `--profile` values are added when present. Arguments
+are passed directly as argv, not through a shell. Stdout and stderr are captured
+separately. `SaveRenderResult` writes the captured result as JSON for inspection.
+
+## Failure Behavior
+
+Nonzero render exits return both the captured result and an error containing
+the exit code and stderr. Command execution respects context cancellation and
+the configured timeout.
+
+## Tests
+
+Inspect:
+
+- `internal/adapters/scriptorium/runner_test.go`
+- `internal/app/app_test.go`
+- `internal/cli/root_test.go`
+
+## Invariants
+
+- `scriptorium` details stay inside the adapter package.
+- The input name for prompt packages is always `data_package`.
+- Render preflight is orchestration behavior; final report generation is not
+  implemented in this adapter yet.