Resource Inspection Implementation Review

Scope And Results

Reviewed the twelve stages of implementation.md against the accepted feature roadmap and the current code and documentation at f083ad5. The implementation commits run from 8add7c4 through f083ad5, following planning commit 8563379.

The selected code architecture is implemented. Resource inspection delegates from the facade through the internal engine to captured configuration records; execution keeps its backend-completed targets, and requirement discovery keeps its lightweight metadata path. Public projections detach mutable values. Typed sources use ordinary ConfigKit mapping, composition, and resource context.

The initial review identified one documentation finding. The subsequent algorithmic review adds one low-priority optimization opportunity. No correctness defect or unintended new restriction or guarantee was identified in the reviewed implementation. The resource-oriented profile result and changed post-handoff null fallback are deliberately selected compatibility changes, not accidental regressions.

Findings

R1. Reconcile Remaining Inspection Contract Documentation [P2]

Status: Open. Affected stages: 1, 11, and final reconciliation in 12.

Locations:

Package GoDoc, lines 50–68: the JSON section still explicitly lists ProfileInspection and PromptInspection among values without stable JSON representations.
Configuration migration guidance, lines 133–139: it still says that InspectProfile applies backend completion.

These statements contradict the implemented result contracts in resource_inspection.go, the method GoDoc in engine.go, and the updated consumer guidance. The result types now deliberately own JSON/YAML keys, nesting, and omission semantics. Profile inspection reports only the resolved profile's fields; backend-completed settings belong to request preparation.

Impact: Consumers consulting package documentation are told that the new generic rendering contract is unavailable. Consumers following the migration guide may still expect backend endpoints, credential sources, or provider defaults in a profile report even though those fields can now be absent. This undermines the primary migration and reporting purpose of the feature.

Required correction:

Update the package GoDoc's serialization description to include the selected resource-result contract and remove the contradictory exclusions. Link to the result/method owners for details. Preserve the distinction from source inputs, provenance inspection, and unrelated values without a serialization contract; do not add byte-format, ordering, or round-trip guarantees.
Replace the migration guide's backend-completion claim with the resolved resource boundary and point readers needing completed request settings to the existing preparation APIs/current consumer guidance.
Check the remaining current documentation for equivalent stale claims. Published historical release notes should remain unchanged.

Verification: Review the rendered package GoDoc and the affected migration passage against the implemented types and method behavior; check edited local links and whitespace. This is a documentation correction and does not require another implementation path, compatibility field, or new runtime test.

R2. Hoist The Prompt Presence Lookup Out Of The Input Loop [P3]

Status: Open for consideration. Affected stage: 4.

Location: Prompt resource projection, InspectPrompt, lines 77–85, especially state.promptMetadata[id][i] at line 81.

Every input repeats a lookup in the same map using the same prompt ID. The map and selected metadata slice do not change during the loop; only the slice index changes. This loop organization was not an algorithm selected by the roadmap.

Complexity: Let I be the selected prompt's input count, M its message count, and L the prompt ID's byte length. With expected hash-table probing, map lookup is constant in the number of catalog entries, but hashing a string key can still cost O(L). The current loop can therefore spend O(I × L) on repeated key processing, for O(L + I × L + I + M) total adapter projection time. Valid resource IDs have no fixed length limit. Go 1.27.3's ordinary string-map lookup hashes the supplied key on each lookup; its small-map fast path is an optimization, not a general elimination of this cost.

Potential refactoring: Fetch presence := state.promptMetadata[id] once before iterating over the inputs and use presence[i].required. This changes the projection bound to O(L + I + M) with constant additional storage. The existing O(I + M) result allocation and public ownership copies remain unchanged. No new cache, API, validation, or ID limit is needed.

This is a modest loop-invariant hoist, not a claim that inspection is quadratic in catalog size. When ID length is treated as a fixed small constant, both versions are linear in inputs/messages; the improvement removes an avoidable multiplicative dependence when IDs and input counts grow independently.

Verification: Existing inherited-input presence and generic encoding tests should continue to pass, including absent versus explicit false. Source review can verify that the invariant lookup is outside the loop. No timing threshold, real-world performance study, or test of an exact map-call count is needed.

Stage-By-Stage Review Record

Stage	Evidence inspected and result
1 — Result declarations	`resource_inspection.go` and nested diagnostic tags in `backends.go` match the selected fields and optional-pointer representation. Package-level serialization documentation still needs R1.
2 — Null interpretation	`captureExecutionProfile` uses configured pointer/map presence; profile-only tri-state capture is removed. Target and isolation tests cover null/omission fallback, inherited null, empty-string clearing, map overlay, and the required-key rule.
3 — Backend/profile resources	`internal/configuration/resources.go` reads indexed resolved records, not completed targets. Adapter tests cover partial/inherited profiles, derived queue defaults, missing IDs, and configured/inherited diagnostics.
4 — Prompt resources	Prompt capture retains the resolved record, materialized messages, and required/repair presence. Prompt tests cover inherited imported text and omitted versus explicit values; inspection does not reopen sources or resolve referenced profiles/schemas.
5 — Facade wiring	The internal engine's resource interface delegates to the snapshot after namespace qualification. Root conversion detaches pointers, collections, and nested diagnostics; backend not-found mapping is local to `InspectBackend`. Public error and cancellation tests pass.
6 — Existing consumers	Superseded runner wrappers and their dedicated tests are removed. Execution helpers and the narrow requirement repository remain. Existing profile, inheritance, source, namespace, bundle, and preparation-example tests are migrated.
7 — Generic encoding	`resource_serialization_test.go` encodes real results with ordinary JSON and YAML encoders and checks semantic keys, omission, explicit values, empty collections, diagnostic objects, and provider nulls. The existing YAML dependency is direct; its version is unchanged.
8 — Isolation/selection	Public tests cover scoped backend lookup, qualified bypass, no namespace fallback, independent results, concurrent inspection/mutation, offline references, execution fallback, and retained null provenance.
9 — Typed sources	`prompts.go` and `BackendSource` use explicit mapping construction with optional pointers/collections and sibling `extends`. They do not validate incomplete records, resolve inheritance, or read content files.
10 — Real composition	Typed-source tests cover snapshots, layered completion, nested settings, order, inheritance, explicit values, relative file context, invalid final definitions, and empty top-level input.
11 — Documentation	Main consumer, format, and internal guidance, README, and the unpublished v0.20.0 release note reflect the selected changes. Two remaining current-documentation contradictions require R1.
12 — Combined validation	Race-enabled suite, vet, module tidy comparison, formatting, and changed Markdown link-target checks pass. The documentation finding prevents declaring reconciliation fully complete.

Validation Performed

Using Go 1.27.3 with GOTOOLCHAIN=local, GOWORK=off, and GOPROXY=off:

go test -race ./... passed, including the maintained offline examples.
go vet ./... passed.
go mod tidy -diff reported no changes.
Formatting checks on surviving changed Go files and git diff --check passed.
Local link targets in the changed Markdown documents exist.

The review made no production-code or test changes. These checks do not include live provider diagnostics, release publication, or downstream application changes.

Algorithmic Review

This follow-up reviewed the same production revision, now at repository commit 101a284 (the intervening commit adds only this review document). It used static loop, call-path, ownership, and data-size analysis, not performance measurements. The existing architecture, testing, and documentation policies apply. Explicitly selected algorithms and dependency-owned composition/encoding were not reopened.

Stage	Algorithmic assessment
1 — Result declarations	Types and tags introduce no traversal algorithm. Optional values preserve presence without requiring consumer-side reconstruction.
2 — Null interpretation	The fixed set of profile-field checks is constant-sized. Existing backend-provider overlay and target materialization are retained decisions, not new algorithms to redesign in this audit.
3 — Backend/profile resources	Resolved-record indexes are captured once. Individual inspection selects one record rather than scanning the catalog; public provider-map detachment visits the selected value graph.
4 — Prompt resources	Input and message loops visit their respective sequences once, but the input loop has the avoidable repeated string-key lookup described in R2. Scalar presence capture does not scan all prompts for each input.
5 — Facade wiring	Namespace qualification is proportional to ID length. Pointer projection is fixed-field work; nested provider copying is proportional to the copied value graph. No per-field whole-catalog lookup is introduced.
6 — Existing consumers	Removed wrappers do not leave a second resolution pass. Requirement discovery continues using the narrow metadata/snapshot path, rather than copying the expanded resource report.
7 — Generic encoding	Standard JSON/YAML encoding and presence-aware result types are selected planning decisions. No Promptkit serialization round trip or generic reflection layer was added.
8 — Isolation/selection	Inspection itself performs no admission, provider work, schema compilation, or file reads. Caller-owned copies scale with the selected report rather than unrelated resources.
9 — Typed sources	Constructors iterate once over supplied records and their nested input/message sequences, then delegate snapshotting to ConfigKit. These are additive nested sizes, not an all-inputs-by-all-messages cross product.
10 — Real composition	Tests exercise the dependency-owned loading path; no second inheritance resolver or normalization pass was added for typed sources.
11 — Documentation	No production algorithm; the previously recorded documentation correction remains R1. No additional performance guarantee is selected.
12 — Combined validation	The reviewed new production paths contain no additional cross-resource quadratic scan or correctness defect requiring a finding. Existing successful suite/vet results remain applicable because production code is unchanged.

The R2 complexity analysis accounts for string-key processing, rather than assuming every map lookup is free of key-size cost. The selected Go toolchain's internal/runtime/maps/runtime_faststr.go was inspected to confirm that point. No production implementation, test, benchmark, dependency, or public contract was changed by this follow-up.

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