137 lines
6.5 KiB
Markdown
137 lines
6.5 KiB
Markdown
# Adapter Internals
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## Purpose
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Scriptorium adapters translate executable inputs into Promptkit public requests
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and translate Promptkit results or errors back to CLI or HTTP behavior. They
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own IO and presentation mechanics, not framework decisions.
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External contracts are canonical in the [CLI reference](../cli.md) and
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[HTTP API reference](../api.md). Promptkit's public engine contract is
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described by its tagged
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[Go consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md).
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## Components And Collaborators
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- `cmd/scriptorium` passes process arguments and streams to
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`internal/adapter/cli`.
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- `internal/adapter/cli` resolves settings through `internal/config`,
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constructs `promptkit.Engine`, maps CLI values to `promptkit.RunRequest`,
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and owns output files, summaries, and exit codes.
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- `internal/config` delegates application YAML decoding, default resolution,
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overrides, and validation ordering to ConfigKit. The CLI supplies only
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explicitly visited application flags as overrides and renders safe structured
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load diagnostics on stderr.
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- `internal/adapter/http` strictly decodes request DTOs, maps them to Promptkit
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public values, calls its adapter-owned `Runner` interface, and maps results
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and errors to HTTP DTOs.
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- `internal/format` renders `promptkit.PreparedRun` values as deterministic text
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or JSON.
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- `internal/report` maps Promptkit's terminal execution event to a small
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application-owned value without invoking the engine or writing output.
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## Wiring Flows
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### CLI
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`run` calls `promptkit.Engine.Run`; `render` calls
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`promptkit.Engine.Prepare`. Both share request mapping for prompt ID/version
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and profile selection, optional file inputs, variables, and presence-aware
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execution overrides. Omitted framework settings remain zero values so Promptkit
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resolves its own defaults and definition-required inputs.
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The application retry setting enters shared engine construction, while a
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run/render flag enters only the mapped request. The server uses the same engine
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setting and retains one backend admission state. Render prepares without
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generation.
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`inspect prompt` maps the selected ID and optional version to
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`promptkit.Engine.InspectPrompt`, then formats Scriptorium-owned inspection
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data. It constructs the same configuration-aware engine but does not perform
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preparation or generation.
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`inspect profile` maps an explicit profile ID to `Engine.InspectProfile` and
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formats a safe application-owned effective profile view. It intentionally does
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not require prompt, schema, or artifact sources.
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The `config` family loads the same application ConfigKit result once and uses
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its validation, effective-output, source, and explanation views directly. It
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does not construct a Promptkit engine. The CLI maps source records into a small
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JSON DTO for `sources`; `show` and `explain` use ConfigKit's own writers.
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`serve` constructs Scriptorium's restricted HTTP artifact reader, injects it
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with `promptkit.WithArtifactReader`, passes the engine through the HTTP
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adapter's consumer-owned `Runner` interface, and starts the server.
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The command paths assemble the engine from the same resolved prompt, profile,
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and schema directories plus configured custom backends. Each backend is mapped
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to Promptkit's public `Backend` value and registered during engine construction,
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so one constructed server engine retains one immutable backend registry and its
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associated capacity state.
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### HTTP
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The handler enforces transport limits and strict JSON decoding before mapping
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DTOs into `promptkit.RunRequest`, `promptkit.ArtifactRef`, and
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`promptkit.ExecutionTargetOverride`. On success it reads Promptkit artifact,
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validation, model, usage, and metadata values directly.
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The optional HTTP retry count maps to `RunRequest.TransientRetries` without
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mutating the shared engine. Negative values are rejected before invocation;
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Promptkit controls retries and backend admission for concurrent requests.
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Failure mapping uses `errors.Is` against Promptkit's public sentinels and the
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HTTP reader's Scriptorium-owned containment and size errors. Wrapped reader
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errors preserve their identity through Promptkit's artifact-load boundary.
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The report collector is per invocation. It ignores nonterminal events and
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copies terminal aggregates once, including usage presence and completeness.
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It retains no history or shared state; adapters decide whether to attach it and
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how to present its snapshot.
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CLI `run` attaches one only when a report path is selected, writes generated
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output first on success, and then writes the terminal snapshot when present.
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Its report path remains untouched for pre-invocation failures or absent
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terminal observations; report and artifact writes are independent.
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HTTP `POST /v1/runs` attaches a separate collector to each invocation only when
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`include_execution_report` is true. Its optional top-level `execution` field
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appears in success or error envelopes only when Promptkit emits a terminal
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event. Pre-invocation adapter errors and absent terminal events leave it out.
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The complete serialized success or report-bearing error response is subject to
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the configured response-size limit; overflow returns the compact 413 error
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without a report. Field meanings are owned by the [API contract](../api.md#execution-report).
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## Package-Local Guarantees
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- Adapters contain no copied framework types or orchestration.
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- Configuration is resolved before Promptkit engine construction.
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- Explicit numeric overrides preserve presence, including zero.
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- HTTP DTO and error mapping remains stable and transport-owned.
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- Resolved secrets are not serialized or printed.
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- No adapter creates durable run state.
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## Verification
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Inspect:
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- `internal/adapter/cli/run_test.go`
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- `internal/adapter/http/handler_test.go`
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- `internal/adapter/http/artifact_reader_test.go`
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- `internal/format/prepared_run_test.go`
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- `internal/adapter/dependency_test.go`
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The adapter tests protect parsing, configuration mapping, output, status
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mapping, restricted artifacts, and representative real Promptkit-engine
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workflows. The dependency test protects the repository boundary.
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## Change Recipes
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For a CLI or HTTP change:
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1. identify the Scriptorium-owned external contract;
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2. map through Promptkit public values without copying framework semantics;
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3. add or update the narrow application-owned test;
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4. update the canonical Scriptorium contract; and
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5. coordinate and tag Promptkit first if a required public capability is
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genuinely absent.
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Update [source internals](sources.md) when application source locations or HTTP
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artifact containment changes.
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