Reconcile the completed facade planning record
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# CommandKit public facade implementation
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# CommandKit facade planning record
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Status: accepted facade and adapter boundary; implementation pending.
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Status: initial public facade and internal adapter implemented.
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Date: 2026-10-06.
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Original planning: 2026-10-06. Reconciled: 2026-10-07.
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[ADR 0003](../adr/0003-public-facade.md) owns the root facade, internal adapter,
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alternatives, and rationale. The [architecture policy](../policy/architecture.md)
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owns normative dependency and public-surface rules. This roadmap tracks exact API
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work, illustrative package organization, and implementation evidence.
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## Authority and current owners
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The [dispatcher roadmap](02-dispatch.md) tracks registry and typed inputs; the
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[backend roadmap](03-backend.md) tracks Cobra/pflag translation. The CLI plan
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retains command and operator-contract proposals and their approval status.
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[ADR 0003](../adr/0003-public-facade.md) owns the facade/adapter decision and its
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rationale. The [architecture policy](../policy/architecture.md) owns normative
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dependency and public-surface boundaries.
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## 1. Current status
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Root public declarations, private implementation state, and the internal
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Cobra/pflag adapter exist. Exact contracts belong in Go declarations and GoDoc;
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the [consumer guide](../consumers/guide.md) explains their use. The
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[internal overview](../internal/overview.md) owns the actual package inventory,
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and [go.mod](../../go.mod) owns dependency versions.
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The root `commandkit` facade and internal Cobra/pflag isolation are accepted.
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No public declarations, implementation packages, adapter, dependency versions,
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or boundary checker exist yet. There is no public backend selection facility.
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The [initial target](initial.md) and [completed implementation plan](implementation.md)
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record the chosen layout and delivered API work. The initial implementation
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requires no further facade package construction.
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## 2. API and internal representation design
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## Retired package exploration
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1. Design root-owned registration, binding, provider, invocation, and outcome
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contracts around demonstrated consumer needs. Application input types remain
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application-owned.
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2. Identify internal definitions and private callbacks that let implementation
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invoke typed handlers without importing the root facade or exposing backend
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structures. Separate fresh input lifetime from registration and dependencies.
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3. Use private state and explicit forwarding/conversions, preserving ownership,
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callback lifetime, presence, supported error identity, and cancellation.
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4. Translate backend-owned failures without returning backend objects, including
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through errors or loosely typed values. Preserve useful application error
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identity according to the selected invocation contract.
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5. Select any public dependency types deliberately. Standard context/stream
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contracts are appropriate; ConfigKit/PromptKit types require an API choice.
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Early illustrations considered an `internal/engine` for registration and
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coordination and an `internal/command` for shared declarations, with a root
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limited mainly to forwarding. Those were possible layouts, not required
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packages, and are superseded as active implementation targets.
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### Illustrative package layout
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The selected root contains straightforward private implementation alongside its
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public contracts; the internal adapter isolates backend machinery. Consult the
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internal overview for current responsibilities instead of treating the early
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package table as an inventory or expansion checklist.
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| Package | Possible responsibility |
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| --- | --- |
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| Root `commandkit` | Consumer facade, selected contracts, and conversions. |
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| `internal/engine` | Registry, ownership checks, capability installation, and invocation coordination. |
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| `internal/command`, if needed | Shared definitions and contracts independent of the backend. |
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| `internal/cobra` | Cobra/pflag integration, bindings, and diagnostic translation. |
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## Completed boundary work
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These names and splits are illustrative, not an implemented inventory or required
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package-per-concern layout. Select cohesive packages during implementation. A
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narrow internal engine/adapter interface may be useful where actual interaction
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justifies it. Do not require a public backend interface or a second implementation.
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The initial work established root-owned public named types and handles, selected
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integration dependencies, typed callback/value semantics, backend-neutral bridge
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metadata/results, and adaptation of backend-owned failures. API design,
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package-selection, and initial documentation tasks are complete.
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## 3. Boundary protection and consumer evidence
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The completed plan records review of public declarations and dependency direction,
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plus consumer behavior through the real adapter. Earlier suggestions to adopt
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ConfigKit/ReleaseKit-style automated export scanners were validation possibilities,
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not a requirement to add a checker. Future automation remains a maintenance
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choice under the [testing policy](../policy/testing.md) when its protection
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justifies its cost.
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With implementation, introduce proportionate checks for:
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## Future backend replacement
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- Compiled public exports, including aliases, fields, signatures, constraints,
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callbacks, and promoted methods exposing internal or backend types.
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- Import direction: internal production code must not import root, and Cobra/pflag
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types and operations belong in the adapter.
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- Consumer behavior through the actual adapter, including conversions, fresh
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state, public error identity, and selected invocation semantics.
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ConfigKit and ReleaseKit provide precedents for compiled API and import checks;
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reuse the approach where it protects this boundary without copying their entire
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validation suites or domain restrictions.
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## 4. Completion and later replacement
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Introduce GoDoc, consumer guidance, implemented CLI reference, and internal
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inventory with their corresponding code. Those become canonical owners of exact
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API and current behavior; ADRs retain decision rationale.
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A later backend replacement should preserve the public Go API and selected CLI
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behavior, or follow the release policy for deliberate incompatible behavior.
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Protecting signatures alone is insufficient evidence for parsing, help,
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diagnostics, report, and status compatibility. This is future maintenance scope,
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not an instruction to implement or exercise a replacement now.
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A later replacement remains possible behind the accepted boundary. It must
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preserve the public API and selected CLI behavior or follow the
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[release policy](../policy/release.md) for deliberate incompatible changes.
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Signature isolation alone does not prove behavioral compatibility; parsing,
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help, diagnostic delivery, reports, and outcomes remain relevant to that review.
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Replacement and public backend selection are outside the initial delivered scope.
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@@ -105,16 +105,18 @@ Owner: [03-backend.md](03-backend.md).
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Owner: [04-facade.md](04-facade.md).
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- [ ] Remove the pending status and claims that public declarations,
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- [x] Remove the pending status and claims that public declarations,
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implementation packages, the adapter, and dependency versions do not exist.
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- [ ] Retire the illustrative `internal/engine` and `internal/command` layout as
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- [x] Retire the illustrative `internal/engine` and `internal/command` layout as
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an active implementation target. Link to the actual root and internal adapter
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inventory without creating another maintained package reference.
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- [ ] Retire completed API/boundary design and documentation tasks. Preserve
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- [x] Retire completed API/boundary design and documentation tasks. Preserve
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legitimate future backend replacement considerations.
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- [ ] Keep old automated boundary-checker suggestions clearly historical or
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- [x] Keep old automated boundary-checker suggestions clearly historical or
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optional; do not turn them into a new implementation requirement.
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**Completion:** Recorded facade completion, retired illustrative extra packages, and preserved backend replacement and proportionate-check considerations.
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## D-05: close the preparation checklist
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Owner: [initial-plan.md](initial-plan.md).
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