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Reuse the declaration validation path across siblings

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This commit is contained in:
Eric Rakestraw
2026-11-07 17:00:12 +00:00
parent e46d28a924
commit aac0e11ae6
4 changed files with 91 additions and 53 deletions
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26
command.go
View File

@@ -443,30 +443,31 @@ func validateCommandDeclaration(command Command) error {
func validateCommandPlacement(command Command) error { func validateCommandPlacement(command Command) error {
var issues []error var issues []error
collectDeclarationIssues(command, nil, true, &issues) // Keep the grown slice header across recursive calls so siblings reuse capacity.
return errors.Join(issues...) var path []string
} var collectDeclarationIssues func(Command, bool)
collectDeclarationIssues = func(command Command, root bool) {
func collectDeclarationIssues(command Command, parents []string, root bool, issues *[]error) {
if command.record == nil { if command.record == nil {
*issues = append(*issues, errors.New("invalid zero command declaration")) issues = append(issues, errors.New("invalid zero command declaration"))
return return
} }
record := command.record record := command.record
path := append(parents, record.name) length := len(path)
path = append(path, record.name)
defer func() { path = path[:length] }()
var label string var label string
if len(record.issues) > 0 || (record.rootOnly && !root) { if len(record.issues) > 0 || (record.rootOnly && !root) {
label = commandpath.Path(path).String() label = commandpath.Path(path).String()
} }
for _, issue := range record.issues { for _, issue := range record.issues {
if label != "" { if label != "" {
*issues = append(*issues, fmt.Errorf("command %q: %w", label, issue)) issues = append(issues, fmt.Errorf("command %q: %w", label, issue))
} else { } else {
*issues = append(*issues, issue) issues = append(issues, issue)
} }
} }
if record.rootOnly && !root { if record.rootOnly && !root {
*issues = append(*issues, fmt.Errorf("root-only command %q is nested beneath another command", label)) issues = append(issues, fmt.Errorf("root-only command %q is nested beneath another command", label))
} }
if record.invalid || record.absent { if record.invalid || record.absent {
return return
@@ -475,9 +476,12 @@ func collectDeclarationIssues(command Command, parents []string, root bool, issu
if child.record == nil { if child.record == nil {
continue continue
} }
collectDeclarationIssues(child, path, false, issues) collectDeclarationIssues(child, false)
} }
} }
collectDeclarationIssues(command, true)
return errors.Join(issues...)
}
func validateCommandName(name string) error { func validateCommandName(name string) error {
return commandpath.ValidateComponent(name) return commandpath.ValidateComponent(name)

7
docs/roadmap/audit/catalog.md
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@@ -491,8 +491,11 @@ Also discussed in the [responsibility assessment](A1-responsibility.md#machinery
## F22 — P3: Successful declaration validation eagerly formats every full path ## F22 — P3: Successful declaration validation eagerly formats every full path
**Complete.** The walk reuses a scratch path and formats it only for retained **Complete.** The walk retains one shared scratch slice header across siblings,
issues or root-only placement errors. Focused declaration and registry tests pass. truncates on every return, and formats only retained issues or root-only placement
errors. The [R1 follow-up](../remediation.md#r1--p3-declaration-validation-can-still-copy-a-shared-deep-prefix-for-every-sibling)
completes the initial path refactor and records source review, passing focused
and full suites, and a deep branching consumer check.
`collectDeclarationIssues` copies and formats each ancestral path before knowing `collectDeclarationIssues` copies and formats each ancestral path before knowing
whether a diagnostic is needed. A valid depth-N declaration chain incurs Θ(N²) whether a diagnostic is needed. A valid depth-N declaration chain incurs Θ(N²)

9
docs/roadmap/implementation.md
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@@ -564,10 +564,11 @@ Neither finding closes merely because the new tree methods exist.
## Stage 17 — Format declaration paths only for diagnostics ## Stage 17 — Format declaration paths only for diagnostics
**Complete.** Declaration traversal uses the recursive scratch path and formats **Complete.** Declaration traversal now captures one shared scratch slice header,
labels only for emitted issues. Focused declaration, registry and retained-error retaining grown capacity across siblings and truncating on every return. Labels
tests pass offline with Go 1.27.0 and `-mod=readonly`; source review confirms are formatted only for emitted issues. The [R1 follow-up](remediation.md#r1--p3-declaration-validation-can-still-copy-a-shared-deep-prefix-for-every-sibling)
valid paths are not eagerly copied and formatted during this walk. corrects the initial by-value traversal and records source-level complexity
verification, passing focused and full suites, and a deep branching consumer check.
Findings: F22. Source: `command.go` collectDeclarationIssues. Findings: F22. Source: `command.go` collectDeclarationIssues.

58
docs/roadmap/remediation.md
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@@ -1,6 +1,6 @@
# Implementation efficiency remediation # Implementation efficiency remediation
Status: one open P3 efficiency finding. Reviewed source: Status: R1 complete; no open findings. Audited source before remediation:
`1cba65fffe966cb70f48c324baf551502544cbad`. `1cba65fffe966cb70f48c324baf551502544cbad`.
## Scope and architecture ## Scope and architecture
@@ -42,7 +42,7 @@ path, rather than proposing a different algorithm or public contract.
| 14 | Shared token consumption advances through short spellings and consumed values; it does not rescan each complete short cluster. | | 14 | Shared token consumption advances through short spellings and consumed values; it does not rescan each complete short cluster. |
| 15 | Implementation retains the selected context-local memoization and source ordering. No residual independent suffix walks were found. | | 15 | Implementation retains the selected context-local memoization and source ordering. No residual independent suffix walks were found. |
| 16 | Implementation uses the selected resolver tree and owned-path results for distinct-prefix discovery and descendant lookup. Those selected algorithms were not reopened. | | 16 | Implementation uses the selected resolver tree and owned-path results for distinct-prefix discovery and descendant lookup. Those selected algorithms were not reopened. |
| 17 | **R1:** a child's grown path slice is not retained for siblings, allowing repeated deep-prefix copying. | | 17 | **R1 complete:** the traversal now retains grown scratch-path capacity across siblings. |
| 18 | Operation-preparation extraction preserves the selected independent inputs and existing preflight rules; no new repeated algorithm was introduced. | | 18 | Operation-preparation extraction preserves the selected independent inputs and existing preflight rules; no new repeated algorithm was introduced. |
| 19 | Capture extraction preserves existing selector/scope processing. The explicitly deferred indexing work remains outside this audit. | | 19 | Capture extraction preserves existing selector/scope processing. The explicitly deferred indexing work remains outside this audit. |
| 20 | Operand/error attribution extraction preserves the selected dense reconstruction and replay merge, without introducing general sorting. | | 20 | Operand/error attribution extraction preserves the selected dense reconstruction and replay merge, without introducing general sorting. |
@@ -52,7 +52,18 @@ path, rather than proposing a different algorithm or public contract.
## R1 — P3: Declaration validation can still copy a shared deep prefix for every sibling ## R1 — P3: Declaration validation can still copy a shared deep prefix for every sibling
**Code:** [command.go](../../command.go), collectDeclarationIssues lines **Complete.** validateCommandPlacement now owns one path slice captured by its
recursive collectDeclarationIssues visitor. Each node appends its name and
defers truncation to its entry length, including on invalid/absent early returns.
Truncation preserves the grown slice header and capacity for subsequent siblings.
Successful traversal therefore takes O(N) amortized path work with O(D) scratch
storage; diagnostic labels are still formatted only when emitted. Child/issue
order, error wrapping, root-only checks and declaration handling are preserved.
See [remediation verification](#remediation-verification) for the checks performed.
The analysis below records the defect at the audited revision.
**Audited code:** [command.go](../../command.go), collectDeclarationIssues lines
450–479, particularly append at line 456 and recursive calls at line 478. 450–479, particularly append at line 456 and recursive calls at line 478.
validateCommandPlacement starts the walk with nil parents; installation reaches validateCommandPlacement starts the walk with nil parents; installation reaches
it through the candidate validator. it through the candidate validator.
@@ -110,19 +121,16 @@ strings. This needs neither a public API change nor restrictions on declaration
size or depth. It completes the selected design without promising that all App size or depth. It completes the selected design without promising that all App
construction becomes linear. construction becomes linear.
**Verification and status:** a temporary public consumer installed a valid **Audit verification:** a temporary public consumer installed a valid
32-node shared prefix with 64 leaf siblings and dispatched a leaf successfully. 32-node shared prefix with 64 leaf siblings and dispatched a leaf successfully.
The prefix depth was selected at an ordinary slice-capacity boundary. This The prefix depth was selected at an ordinary slice-capacity boundary. This
confirms that the workload shape is accepted; it is not a timing or allocation confirms that the workload shape is accepted; it is not a timing or allocation
measurement. The copying bound follows from the recursive slice-header ownership measurement. The copying bound follows from the recursive slice-header ownership
and append semantics above. and append semantics above.
Use existing declaration/registry behavioral checks to preserve results, and At audit time, Stage 17 and F22 were marked complete without accounting for this
review that grown capacity survives sibling traversal. Include a branching branching case. Their completion evidence now records the shared slice remedy
shape when checking the remedy; a chain alone misses this case. No timing and links to this follow-up.
threshold or benchmark is necessary. Stage 17 and F22 are currently marked
complete; their completion evidence should be corrected to account for this
remaining case when remediation is performed.
## Validation and limits ## Validation and limits
@@ -133,7 +141,29 @@ cached Go 1.27.0 binary with `GOTOOLCHAIN=local`, `GOPROXY=off`, and
Cached successful results were reused for unchanged code. Those suites validate Cached successful results were reused for unchanged code. Those suites validate
behavior, not asymptotic copy costs. behavior, not asymptotic copy costs.
No production code, repository tests, manifests or existing roadmap records were During the audit, no production code, repository tests, manifests or existing
modified. No benchmarks, performance profiles, real-world latency/memory data, roadmap records were modified. No benchmarks, performance profiles, real-world
external services, credentials or publication operations were used. No additional latency/memory data, external services, credentials or publication operations were
ordinary correctness defect was established during this algorithmic review. used. No additional ordinary correctness defect was established during this
algorithmic review.
## Remediation verification
The focused declaration/registry checks passed uncached, including retained
causes, absence, invalid declarations, nested root-only groups and transactional
installation. The independent core suite and aligned three-module suite also
passed offline using cached Go 1.27.0 with `GOTOOLCHAIN=local`, `GOPROXY=off` and
`-mod=readonly`. The aligned command was
`go test -mod=readonly ./... ./integrations/ckconfig/... ./integrations/ckprompt/...`;
the independent core check used `GOWORK=off go test -mod=readonly ./...`.
The temporary public consumer was rerun successfully with a valid depth-32 prefix
and 64 leaf siblings. This checks installation and dispatch for the branching
shape. Source inspection establishes the complexity improvement: all recursive
calls update the same slice header, growth survives return, and each node's
deferred truncation restores its parent's path on every exit. Owned diagnostic
strings are constructed before sibling traversal can change the scratch path.
Existing behavioral tests were reused; no timing/allocation threshold or new
benchmark was introduced. These results concern this validation walk; other
construction phases retain their own costs.