Feature design: ¶

Status: DRAFT | RESEARCHED | APPROVED | IMPLEMENTED | SUPERSEDED
Owner:
Issue:
Target release: Last verified:

Executive summary¶

Describe the user problem, proposed capability, and measurable outcome in plain language. State why this belongs in dpone rather than a one-off adapter.

Personas and customer journey¶

Persona	Goal	Current pain	Success signal

Walk through discovery, prerequisites, configuration, execution, observation, diagnosis, recovery, production operation, and upgrade.

Scope¶

In scope¶

TBD

Non-goals¶

TBD

Assumptions and constraints¶

TBD

Public contract¶

CLI¶

Commands, options, defaults, exit codes, stdout/stderr, JSON/file output, overwrite/atomicity, and examples.

Python API¶

Imports, signatures, models, exceptions, and parity with CLI.

Manifest/schema¶

Shape, defaults, validation, versioning, and old-manifest behavior.

Artifacts and evidence¶

Names, schemas, status vocabulary, digests, and retention.

Compatibility and migration¶

Old behavior, new behavior, deprecation window, migration, and rollback.

Detailed algorithm¶

Describe, step by step:

input acquisition and validation;
normalization and capability negotiation;
planning and deterministic identity;
execution and transaction boundaries;
state/checkpoint and evidence ordering;
retries, resume, replay, cancellation, and rollback;
concurrency, ordering, partitioning, and resource limits;
failure classification and user recovery;
output and artifacts.

Pseudocode¶

<precise pseudocode>

State machine¶

stateDiagram-v2
    [*] --> Planned
    Planned --> Running
    Running --> Succeeded
    Running --> Failed
    Failed --> Running: safe retry/resume

Edge cases¶

Cover empty input, null/missing values, duplicates, timeouts, process crash, partial write, schema drift, unsupported capability, and deep/nested data where applicable.

Architecture¶

Components and responsibilities¶

Component	Existing/new	Responsibility	Dependencies

Ports, adapters, and composition root¶

Explain interface granularity, dependency direction, and concrete construction.

Data and control flow¶

flowchart LR
    A[Input] --> B[Validate/Normalize]
    B --> C[Plan]
    C --> D[Execute]
    D --> E[State and Evidence]

Alternatives and tradeoffs¶

Alternative	Advantages	Disadvantages	Decision

ADR requirement¶

Required? Why or why not?

Quality-budget impact¶

Expected modules/SLOC, import-graph edges, coupling risks, and decomposition. Reference docs/benchmarks/quality_budgets.yml.

Market comparison¶

Use current official primary sources. Mark irrelevant systems N/A with reason.

System/version	Relevant capability	Observed design	Strength	Limitation	Adopt/reject	Source/date
dlt
Informatica
Airbyte
Fivetran
Pentaho
Microsoft SSIS
gusty
Astronomer Cosmos
Apache Beam

Measurable differentiation¶

axis:
scenario:
baseline:
metric:
target:
procedure:
artifact:
limitations:

Security, privacy, and operations¶

Secrets, permissions, tenancy, auditability, resource limits, logs/metrics, alerts, SLOs, runbook, and recovery.

Test and certification plan¶

Layer	Scenario	Environment	Expected artifact
Unit
Contract
Integration
Live certification
Performance
Compatibility

Include negative, boundary, retry/replay, idempotency, and migration cases.

Documentation plan¶

Tutorial, how-to, reference, architecture, runbook, CJM, examples, diagrams, cross-links, and generated-reference changes.

Rollout and rollback¶

Feature flag/compatibility mode, observability, migration order, rollback trigger, and post-release verification.

Agent execution plan¶

Agent/role	Owned paths	Read-only paths	Forbidden paths	Dependency

Name the integrator and shared-file owner.

Approval checklist¶

User problem and CJM are clear.
Algorithm and failure semantics are implementable without guessing.
Public contracts and compatibility are explicit.
Architecture and alternatives are justified.
Relevant market research uses current official sources.
Claimed differentiation is measurable.
Tests, evidence, docs, rollout, and rollback are complete.
Path ownership and integration plan are conflict-safe.
Maintainer changed status to APPROVED.