nacl-sa-validate: Research & Knowledge for AI Agents | OpenAgentSkill

Overview

Validate NaCl SA graph consistency, connectivity, requirements, form-domain traceability, UC-form coverage, cross-module rules, feature requests, staleness closure, decision provenance, screen state machines, behavior slices, domain error taxonomy, cache & degradation policies, and BA-to-SA coverage. Use when checking SA quality or says `/nacl-sa-validate`.

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NaCl SA Validate For Codex

Validate the SA graph without writing to it. This workflow reports findings and coverage only; repairs belong to the relevant SA skill and require confirmation.

Read ../nacl-core/SKILL.md, ../references/migration-rules.md, and ../references/verification-vocabulary.md before using this workflow.

Goal Compatibility

This skill can be a target behind nacl-goal only through the validate:module:<MOD-ID> alias. Reference ../nacl-goal/SKILL.md and ../references/goal-codex-contract.md.

Codex itself must not claim that Anthropic /goal ran unless the runtime exposes it and evidence exists. Load the packaged validate proof method as an internal reference only; it is not a project-cwd command. Validation truth is surfaced through GOAL_PROOF. Use the closed Codex status vocabulary when the wrapper cannot run.

Workflow

Levels:

internal: SA-only checks.
ba-cross: BA-to-SA traceability checks.
full: internal plus BA-to-SA checks.
Scoped validation may limit checks to specific modules, use cases, entities, or feature requests when the user provides scope.

Pre-flight:

Verify graph read tooling.
Count canonical SA nodes and report whether the graph has data. The canonical set includes the SA-extension labels: Decision, the screen-machine labels, Slice, DomainError/ErrorPresentation, CachePolicy/DegradationRule, and APIEndpoint; a future L14+ level must extend this set in the same change.
Detect schema drift by comparing labels and relationship types with the SA schema when introspection is available. Known neighbor-layer labels (BA family incl. EntityState/GlossaryTerm/SystemContext; TL family Task/Wave/IntakeItem; legacy RuntimeContract) and zero-count constraint-registered label tokens are NOT drift findings.
Check BA layer availability before BA-to-SA levels. When full is requested but the BA layer is empty, run the complete internal set (L1-L13) and skip the BA-to-SA cross-checks with a warning in the report.
Audit exemption properties used by deeper checks: has_ui, system_only, shared, internal, field_category, and anchor_exempt (L3.7).

Internal checks:

L1 data consistency: required ids, names, property types, duplicate ids, and orphan nodes.
L2 connectivity: modules contain use cases and entities, entities have attributes, enums connect to attributes, and core edges are present.
L3 requirements: use cases have requirements, requirements are typed and linked, and BA rules mapped to requirements are not orphaned. L3.7 (CRITICAL): every must-anchor requirement (class functional|validation|behavioral|interface, read as coalesce(rq.rq_type,rq.req_type,rq.type,'unknown') — real graphs store the class in any of the three) has a REALIZED_BY edge to the step/field/form that implements it — functional/behavioral -> ActivityStep, validation -> FormField, interface -> Form|Screen; the overloaded reserved type values (nfr|adr|question|assumption) and nodes flagged anchor_exempt=true are exempt. L3.7b (WARNING) cross-checks the target label against the class; L3.8 (WARNING, opt-in once any REALIZED_BY exists) flags System steps no requirement realizes.
L4 form-domain traceability: input fields have MAPS_TO, attributes used by forms exist, and internal attributes are exempt only when flagged.
L5 UC-form validation: UI use cases have forms, user steps reference forms when appropriate, and forms are linked to use cases.
L6 cross-module consistency: entities are owned by one module unless marked shared, relationships crossing modules are intentional, and dependencies are recorded.
L7 feature request consistency: FeatureRequest ids are collision-free, linked UCs exist, and requested new or modified scope is traceable.
L8 staleness closure: no node carries review_status='stale' (read with coalesce(n.review_status,'current')). A stale node is a downstream of an upstream change that was never re-synced; stale_origin/stale_since give the lineage. CRITICAL. In scoped runs, restrict to the changed node's dependents.
L9 decision provenance: every active FeatureRequest has IMPLEMENTS -> :Decision; every non-superseded :Decision has a JUSTIFIES edge and a non-empty rationale; superseded decisions carry status='superseded'. L9.1–L9.3 CRITICAL, L9.4 WARNING. L9.1 exempts grandfathered FRs via coalesce(fr.decision_exempt,false)=false; L9.5 (INFO) lists grandfathered FRs so the debt stays visible. Decisions are the graph-native "why" — never stored as standalone markdown. Closing this gap on a pre-provenance project follows the provenance-gap-closure runbook (honest backfill from the FR's own recorded rationale; grandfather only when none is recoverable).

BA-to-SA checks:

XL6: automated BA workflow steps are covered by AUTOMATES_AS use cases, and non-BA UCs are explicitly marked system-only when applicable.
XL7: BA entities and attributes are realized as domain entities and attributes, with external documents handled explicitly.
XL

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File metadata

name: nacl-sa-validate
description: |
  Validate NaCl SA graph consistency, connectivity, requirements, form-domain
  traceability, UC-form coverage, cross-module rules, feature requests, staleness
  closure, decision provenance, screen state machines, behavior slices, domain
  error taxonomy, cache & degradation policies, and BA-to-SA coverage. Use when
  checking SA quality or says `/nacl-sa-validate`.

View original text

---
name: nacl-sa-validate
description: |
  Validate NaCl SA graph consistency, connectivity, requirements, form-domain
  traceability, UC-form coverage, cross-module rules, feature requests, staleness
  closure, decision provenance, screen state machines, behavior slices, domain
  error taxonomy, cache & degradation policies, and BA-to-SA coverage. Use when
  checking SA quality or says `/nacl-sa-validate`.
---

# NaCl SA Validate For Codex

Validate the SA graph without writing to it. This workflow reports findings and
coverage only; repairs belong to the relevant SA skill and require confirmation.

Read `../nacl-core/SKILL.md`, `../references/migration-rules.md`, and
`../references/verification-vocabulary.md` before using this workflow.

## Goal Compatibility

This skill can be a target behind `nacl-goal` only through the
`validate:module:<MOD-ID>` alias. Reference `../nacl-goal/SKILL.md` and
`../references/goal-codex-contract.md`.

Codex itself must not claim that Anthropic `/goal` ran unless the runtime
exposes it and evidence exists. Load
[`the packaged validate proof method`](../../nacl-goal/checks/validate.sh) as
an internal reference only; it is not a project-cwd command. Validation truth
is surfaced through GOAL_PROOF. Use the closed Codex status vocabulary when
the wrapper cannot run.

## Workflow

Levels:

- `internal`: SA-only checks.
- `ba-cross`: BA-to-SA traceability checks.
- `full`: internal plus BA-to-SA checks.
- Scoped validation may limit checks to specific modules, use cases, entities,
  or feature requests when the user provides scope.

Pre-flight:

1. Verify graph read tooling.
2. Count canonical SA nodes and report whether the graph has data. The
   canonical set includes the SA-extension labels: `Decision`, the screen-machine
   labels, `Slice`, `DomainError`/`ErrorPresentation`, `CachePolicy`/`DegradationRule`,
   and `APIEndpoint`; a future L14+ level must extend this set in the same change.
3. Detect schema drift by comparing labels and relationship types with the SA
   schema when introspection is available. Known neighbor-layer labels
   (BA family incl. `EntityState`/`GlossaryTerm`/`SystemContext`; TL family
   `Task`/`Wave`/`IntakeItem`; legacy `RuntimeContract`) and zero-count
   constraint-registered label tokens are NOT drift findings.
4. Check BA layer availability before BA-to-SA levels. When `full` is
   requested but the BA layer is empty, run the complete internal set
   (L1-L13) and skip the BA-to-SA cross-checks with a warning in the report.
5. Audit exemption properties used by deeper checks: `has_ui`, `system_only`,
   `shared`, `internal`, `field_category`, and `anchor_exempt` (L3.7).

Internal checks:

- L1 data consistency: required ids, names, property types, duplicate ids, and
  orphan nodes.
- L2 connectivity: modules contain use cases and entities, entities have
  attributes, enums connect to attributes, and core edges are present.
- L3 requirements: use cases have requirements, requirements are typed and
  linked, and BA rules mapped to requirements are not orphaned. L3.7 (CRITICAL):
  every must-anchor requirement (class functional|validation|behavioral|interface,
  read as `coalesce(rq.rq_type,rq.req_type,rq.type,'unknown')` — real graphs store the
  class in any of the three) has a `REALIZED_BY` edge to the step/field/form that
  implements it — `functional`/`behavioral` -> `ActivityStep`, `validation` ->
  `FormField`, `interface` -> `Form`|`Screen`; the overloaded reserved `type` values
  (nfr|adr|question|assumption) and nodes flagged `anchor_exempt=true` are exempt. L3.7b (WARNING) cross-checks the target label against the class; L3.8
  (WARNING, opt-in once any REALIZED_BY exists) flags System steps no requirement realizes.
- L4 form-domain traceability: input fields have `MAPS_TO`, attributes used by
  forms exist, and internal attributes are exempt only when flagged.
- L5 UC-form validation: UI use cases have forms, user steps reference forms
  when appropriate, and forms are linked to use cases.
- L6 cross-module consistency: entities are owned by one module unless marked
  shared, relationships crossing modules are intentional, and dependencies are
  recorded.
- L7 feature request consistency: `FeatureRequest` ids are collision-free,
  linked UCs exist, and requested new or modified scope is traceable.
- L8 staleness closure: no node carries `review_status='stale'` (read with
  `coalesce(n.review_status,'current')`). A stale node is a downstream of an
  upstream change that was never re-synced; `stale_origin`/`stale_since` give the
  lineage. CRITICAL. In scoped runs, restrict to the changed node's dependents.
- L9 decision provenance: every active `FeatureRequest` has
  `IMPLEMENTS -> :Decision`; every non-superseded `:Decision` has a `JUSTIFIES`
  edge and a non-empty `rationale`; superseded decisions carry
  `status='superseded'`. L9.1–L9.3 CRITICAL, L9.4 WARNING. L9.1 exempts
  grandfathered FRs via `coalesce(fr.decision_exempt,false)=false`; L9.5 (INFO)
  lists grandfathered FRs so the debt stays visible. Decisions are the
  graph-native "why" — never stored as standalone markdown. Closing this gap on
  a pre-provenance project follows the provenance-gap-closure runbook (honest
  backfill from the FR's own recorded rationale; grandfather only when none is
  recoverable).
- L10 screen state machines (SA-extension connectivity): no orphaned
  `Screen`/`ScreenState`/`ScreenEvent`/`Transition`/`ScreenEffect`/`AnalyticsEvent`
  nodes; every extension node has its required parent edge (`HAS_SCREEN`,
  `HAS_STATE`, `HAS_EVENT`, `HAS_TRANSITION`, `TRIGGERS`, `EMITS`); every Screen
  has `RENDERS -> Form` (exempt via `coalesce(scr.formless,false)=false`);
  load/mutate effects have `CALLS -> APIEndpoint`, navigate effects
  `NAVIGATES_TO -> Screen`, analytics effects `EMITS -> AnalyticsEvent`; every
  reified Transition has exactly one same-screen `FROM_STATE`/`TO_STATE`/`ON_EVENT`;
  no two transitions share `(from_state, on_event)` unless all are guarded
  (determinism); exactly one `is_initial=true` state per screen and every
  non-initial state is reachable from it; error states have an escape transition
  (exempt via `coalesce(st.terminal,false)=false`; missing user-triggered escape
  is WARNING); effect edges target correct labels; kind vocabularies are
  canonical (`state_kind` ∈ initial|loading|busy|content|empty|error,
  `event_kind` ∈ user|system|lifecycle, `effect_kind` ∈
  load|mutate|navigate|analytics). A graph with zero Screen nodes passes L10
  cleanly. Label-qualify every query — `HAS_STATE` and `TRIGGERS` names are
  shared with the BA layer.
- L11 behavior slices (SA-extension connectivity): no orphaned `Slice` nodes;
  every Slice has its parent `(:UseCase)-[:HAS_SLICE]->`; every Slice has at
  least one behavioral anchor — `COVERS -> ScreenState|Transition` and/or
  `(sl:Slice)-[:CALLS]-> APIEndpoint` (no exemption flag by design: anchorless
  behavior text belongs in `UseCase.acceptance_criteria`, not in a node);
  COVERS targets belong to a screen of the slice's own UC; every slice of a
  planned UC (one that `GENERATES` tasks) has `VERIFIED_BY -> Task` owned by
  that UC (self-healing: `nacl-tl-plan` re-links on re-plan); `VERIFIED_BY`
  and `CALLS` targets carry correct labels; no slice has an empty `then`
  (CRITICAL — the unverifiable-behavior failure, mirror of the L9.3 empty
  rationale); `slice_kind` ∈ happy|alternate|error|edge (WARNING); machine
  elements of slice-adopting UCs not covered by any slice are WARNING;
  a UC with slices but no happy-kind slice is INFO. A graph with zero Slice
  nodes passes L11 cleanly. Label-qualify `CALLS` by source — the name is
  shared with `ScreenEffect -> APIEndpoint`.
- L12 domain error taxonomy (SA-extension connectivity): no orphaned
  `DomainError`/`ErrorPresentation` nodes; every DomainError has its parent
  `(:Module)-[:HAS_ERROR]->` and ≥1 incoming `(api:APIEndpoint)-[:MAY_RAISE]->`
  (no exemption flag by design: an error observable at no API surface is an
  implementation detail, not a domain error; provisional endpoints satisfy the
  anchor); every ErrorPresentation has its parent
  `(:DomainError)-[:PRESENTED_AS]->` and ≥1 incoming
  `(st:ScreenState)-[:SHOWS]->`; `HANDLES` runs ScreenState -> DomainError and
  obeys the channel rule — the handling state's screen has a
  `ScreenEffect-CALLS` to an endpoint that MAY_RAISE the error (deliberately
  NO same-UC rule: errors are shared module vocabulary); MAY_RAISE /
  PRESENTED_AS / SHOWS targets carry correct labels; SHOWS closes the
  triangle (a state never shows a presentation of an error it does not
  handle); no blank `DomainError.code` (the API-envelope join key) or
  `ErrorPresentation.message` (user-language text, never the internal code;
  for `silent` presentations it documents the observable absence) — both
  CRITICAL; `error_kind` ∈ validation|not_found|conflict|permission|
  rate_limit|external|internal and `presentation_kind` ∈ toast|banner|inline|
  modal|fullscreen|silent (WARNING); errors raisable through a screen's own
  calls that no state handles are WARNING; handled errors with no shown
  presentation are WARNING; error-kind slices covering error states that
  handle no catalogued error are INFO. A graph with zero DomainError nodes
  passes L12 cleanly. All five edge names are unshared (no label-qualification
  hazard, unlike L10/L11).
- L13 cache & degradation policies (SA-extension connectivity): no orphaned
  `CachePolicy`/`DegradationRule` nodes; every CachePolicy has its parent
  `(:Module)-[:HAS_CACHE]->` (the cache catalog is module-scoped shared
  vocabulary, like the error catalog) and ≥1 outgoing
  `(cp)-[:CACHES]->(:APIEndpoint)` (no exemption flag by design: a policy
  caching no surface is dead vocabulary; provisional endpoints satisfy the
  anchor); every DegradationRule has its parent
  `(:UseCase)-[:HAS_DEGRADATION]->` (rules are UC-scoped behavior, like
  slices — deliberately asymmetric to the module-scoped catalog) and ≥1
  anchor — `ON_ERROR -> DomainError` and/or `DEGRADES_TO -> ScreenState`
  (no exemption; an anchorless rule is unreachable prose); error-triggered
  rules (`trigger_kind='error'`) REQUIRE `ON_ERROR`; `DEGRADES_TO` targets a
  state of a screen of the rule's OWN UC (same-UC rule), and for
  error-triggered rules the target's screen must actually call (via
  `ScreenEffect-CALLS`) an endpoint that MAY_RAISE one of the rule's
  ON_ERROR errors (channel rule); HAS_CACHE / CACHES / HAS_DEGRADATION /
  ON_ERROR / DEGRADES_TO targets carry correct labels; no blank
  `invalidation_kind` (the load-bearing cache contract — when the cache
  stops lying), no `ttl`-kind policy without `ttl_seconds`, no blank
  `behavior` (the observable degraded behavior, mirror of `slice.then`) —
  all CRITICAL; `storage_kind` ∈ memory|local_storage|indexed_db|cache_api|
  http|server|cdn, `invalidation_kind` ∈ ttl|event|manual|session|never,
  `trigger_kind` ∈ error|offline|capability, `fallback_kind` ∈ cached_data|
  static_content|alternate_provider|alternate_ui|skip_unit|backoff
  (WARNING); a backoff fallback on an explicitly `retryable=false` error is
  WARNING (retryable consistency — the consumer of the Phase-3 groundwork);
  cached surfaces whose retryable/external errors no rule degrades are
  WARNING (anchored on CACHES, so error-only graphs stay silent);
  `cached_data` rules that meet no CachePolicy through their errors' raisers
  or their screen's calls are INFO; two same-storage policies on one
  endpoint are WARNING. A graph with zero CachePolicy/DegradationRule nodes
  passes L13 cleanly. All five edge names are unshared (second phase in a
  row).

BA-to-SA checks:

- XL6: automated BA workflow steps are covered by `AUTOMATES_AS` use cases, and
  non-BA UCs are explicitly marked system-only when applicable.
- XL7: BA entities and attributes are realized as domain entities and
  attributes, with external documents handled explicitly.
- XL

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

License: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
Low GitHub adoption signal
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 25 GitHub stars
Stars/forks activity: 25 stars, 3 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

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Source & usage notes

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Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: ITSalt/NaCl
License: MIT
Version: Unknown
Last GitHub push: Aug 3, 2026
Registry updated: Sep 12, 2026
Instruction path: codex-plugin-src/workflow-overlays/nacl-sa-validate/SKILL.md @ a76a4e6364e7

Version reported in registry metadata; check source releases before relying on it.

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49/100

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      "avg_output_quality": null,
      "production_outcomes": 0,
      "last_outcome_at": null,
      "label": "No agent outcome data yet"
    },
    "auto_install": {
      "allowed": false,
      "sandbox_required": true,
      "reason": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
    },
    "best_for": [
      "research",
      "agent-skill"
    ],
    "known_risks": [
      "AI review approval is missing",
      "Low GitHub adoption signal",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 25 GitHub stars",
      "Stars/forks activity: 25 stars, 3 forks; issue activity unavailable in current metadata",
      "Dependency/runtime risk: command execution surface, credential or environment access",
      "Permission surface: secrets or environment access, shell or command execution"
    ]
  },
  "agent_proven": {
    "version": "agent-proven-v1",
    "score": 0,
    "tier": "unproven",
    "label": "Needs first agent run",
    "summary": "No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.",
    "metrics": {
      "totalOutcomes": 0,
      "successfulOutcomes": 0,
      "failedOutcomes": 0,
      "installAttempts": 0,
      "installSuccessRate": null,
      "successRate": null,
      "recentSuccessRate": null,
      "recentFailureRate": null,
      "riskBlocked": 0,
      "setupRequired": 0,
      "notRelevant": 0,
      "avgOutputQuality": null,
      "avgTimeToUsefulMs": null,
      "productionOutcomes": 0,
      "humanReviewRequired": 0,
      "uniqueAgents": 0,
      "lastOutcomeAt": null
    },
    "signals": [],
    "penalties": [
      "No real agent outcome evidence yet"
    ]
  },
  "audit": {
    "score": 68,
    "risk_level": "needs_review",
    "risk_label": "Needs review",
    "warnings": [
      "Dependency or permission surface needs review",
      "Permission surface may require sandboxing",
      "Low GitHub adoption signal",
      "AI review approval is missing",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 25 GitHub stars",
      "Stars/forks activity: 25 stars, 3 forks; issue activity unavailable in current metadata"
    ]
  },
  "safety_gate": {
    "tier": "blocked",
    "label": "Blocked for auto-install",
    "auto_install_policy": "block",
    "auto_install_allowed": false,
    "human_review_required": true,
    "blocked": true,
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
  },
  "quality": {
    "score": 49,
    "label": "Needs review"
  },
  "supply": {
    "track": "Research and knowledge work",
    "scenario": "Research agents",
    "maintenance": "2mo since push",
    "risk": "Needs review"
  },
  "alternative_skills": [],
  "do_not_use_when": [
    "teams that need a vendor-supported SLA",
    "production agents without a repository review",
    "Low GitHub adoption signal",
    "No OpenAgentSkill engagement data yet",
    "High-risk permission hints: Shell or command execution, Secrets or environment access",
    "Dependency or permission surface needs review",
    "Permission surface may require sandboxing",
    "AI review approval is missing"
  ],
  "agent_contract": {
    "task_input": "Use nacl-sa-validate in an agent workflow",
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
    "install_policy": "block",
    "minimum_review_before_use": [
      "Trust: 67/100 Manual review",
      "Audit: 68/100 Needs review",
      "Safety: 20/100 Avoid automatic install",
      "Review repository, license, install command, and permission surface before production use."
    ],
    "expected_agent_output": {
      "selected_skill": "itsalt-nacl-sa-validate (nacl-sa-validate)",
      "install_command": "npx skills add ITSalt/NaCl --skill nacl-sa-validate",
      "risk_summary": "Needs review; Blocked for auto-install; Review before production",
      "verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
    }
  },
  "outcome_feedback": {
    "endpoint": "https://www.openagentskill.com/api/agent/outcome",
    "method": "POST",
    "requires_resolve_event_id": true,
    "event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
    "expected_outcomes": [
      "success",
      "failed",
      "not_relevant",
      "blocked_by_risk",
      "setup_required"
    ],
    "payload_template": {
      "event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
      "skill_slug": "itsalt-nacl-sa-validate",
      "task": "Use nacl-sa-validate in an agent workflow",
      "agent": "codex",
      "outcome": "success",
      "install_used": true,
      "risk_blocked": false,
      "setup_required": false,
      "task_success": true,
      "output_quality": 4,
      "error_type": null,
      "human_review_required": false,
      "workspace": "sandbox",
      "time_to_useful_ms": 120000,
      "notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
    }
  },
  "endpoints": {
    "web": "https://www.openagentskill.com/skills/itsalt-nacl-sa-validate",
    "api": "https://www.openagentskill.com/api/agent/skills/itsalt-nacl-sa-validate",
    "audit": "https://www.openagentskill.com/skills/itsalt-nacl-sa-validate/audit",
    "eval": "https://www.openagentskill.com/api/agent/evals?slug=itsalt-nacl-sa-validate&task=Use%20nacl-sa-validate%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20nacl-sa-validate%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20nacl-sa-validate%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/itsalt-nacl-sa-validate/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/itsalt-nacl-sa-validate"
  }
}

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Creator: ITSalt
Source: ITSalt/NaCl
Indexed by: OpenAgentSkill community index

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L13 cache & degradation policies (SA-extension connectivity): no orphaned CachePolicy/DegradationRule nodes; every CachePolicy has its parent (:Module)-[:HAS_CACHE]-> (the cache catalog is module-scoped shared vocabulary, like the error catalog) and ≥1 outgoing (cp)-[:CACHES]->(:APIEndpoint) (no exemption flag by design: a policy caching no surface is dead vocabulary; provisional endpoints satisfy the anchor); every DegradationRule has its parent (:UseCase)-[:HAS_DEGRADATION]-> (rules are UC-scoped behavior, like slices — deliberately asymmetric to the module-scoped catalog) and ≥1 anchor — ON_ERROR -> DomainError and/or DEGRADES_TO -> ScreenState (no exemption; an anchorless rule is unreachable prose); error-triggered rules (trigger_kind='error') REQUIRE ON_ERROR; DEGRADES_TO targets a state of a screen of the rule's OWN UC (same-UC rule), and for error-triggered rules the target's screen must actually call (via ScreenEffect-CALLS) an endpoint that MAY_RAISE one of the rule's ON_ERROR errors (channel rule); HAS_CACHE / CACHES / HAS_DEGRADATION / ON_ERROR / DEGRADES_TO targets carry correct labels; no blank invalidation_kind (the load-bearing cache contract — when the cache stops lying), no ttl-kind policy without ttl_seconds, no blank behavior (the observable degraded behavior, mirror of slice.then) — all CRITICAL; storage_kind ∈ memory|local_storage|indexed_db|cache_api| http|server|cdn, invalidation_kind ∈ ttl|event|manual|session|never, trigger_kind ∈ error|offline|capability, fallback_kind ∈ cached_data| static_content|alternate_provider|alternate_ui|skip_unit|backoff (WARNING); a backoff fallback on an explicitly retryable=false error is WARNING (retryable consistency — the consumer of the Phase-3 groundwork); cached surfaces whose retryable/external errors no rule degrades are WARNING (anchored on CACHES, so error-only graphs stay silent); cached_data rules that meet no CachePolicy through their errors' raisers or their screen's calls are INFO; two same-storage policies on one endpoint are WARNING. A graph with zero CachePolicy/DegradationRule nodes passes L13 cleanly. All five edge names are unshared (second phase in a row).