Component Validator

Component Validator

Audit a single Datex Studio component file against its type-specific authoring rules — the final read-only gate after a creator skill has finished writing or modifying a component, and before the change is upserted to the branch. This skill is a generic dispatcher: it reads the component file, picks the matching creator skill's reference document by file suffix, and runs the checklist from that document. It returns a structured punch-list (Blockers / Warnings / Nits) — never a rewrite.

See also: grid-validator — grid files (*-grid.json) carry several gotchas the generic dispatcher does not catch (envelope-vs-body shape, text-display coercion, five-location invariant). For grids, prefer grid-validator and treat this skill as a fall-back if grid-validator is unavailable.

See also: component-wiring-check — cross-component reference contracts (one component pointing at another). This validator only audits a single file in isolation; it flags obvious wiring drift it can see in that one file (e.g. a configParameters block that does not mirror the file's own inParams) but does not chase external references.

CAC note: a Custom Angular Component (configurationTypeId: 36, a dxs ng working folder — manifest.json + app.<ref>.component.ts with //#region __COMPONENT_TYPES__/__COMPONENT_BODY__) is not a single-file JSON body, so this skill's suffix dispatch doesn't apply. Audit it per custom-angular-component-creator's own Pre-Flight Checklist instead.

References

• ../datex-studio-conventions/file-format.md — configurationTypeId table, single-line minified JSON rule, TypeScript-expression encoding
• ../datex-studio-conventions/naming-conventions.md — Suffix table, referenceName ↔ file-stem rule, snake_case vs camelCase guidance
• ../datex-studio-conventions/defaults.md — Default accessModifier, description length cap, default package rules
• Creator-skill reference documents (the rulebook this validator dispatches into; see suffix table in the Sub-agent block below)

Dependencies

• Creator skills (action-creator, function-creator, grid-creator, hub-creator, form-creator, editor-creator, selector-creator, storage-creator, type-definition-creator, backend-test-creator, datasource-creator) — each one's references/<type>.md document is the rulebook this validator dispatches into by file suffix. Update them and this validator picks up the new rules automatically.
• custom-angular-component-creator skill — CAC (configurationTypeId: 36) working folders don't dispatch by suffix (see the CAC row in the Sub-agent table below); this validator instead points at that skill's own Pre-Flight Checklist as the rulebook.
• datex-studio-conventions skill — generic cross-cutting rules (file format, naming, defaults) that apply to every component regardless of suffix.
• datex-studio-shared / datex-studio-runtime skills — branch-setup primitives and platform-runtime globals referenced by the per-type rule docs.
• tailoring-overlay skill — overlay-specific shadow-marker rules invoked when the file is a tailored overlay variant rather than a base component.
• component-wiring-check skill — cross-component audit invoked when the punch-list surfaces wiring drift the parent wants to chase further.

Workflow

This skill is typically invoked by a creator skill at the end of its authoring loop, or by the user directly with "audit this file before merge". The invocation pattern is a Task-tool sub-agent dispatch — give the prompt template in the ## Sub-agent section below to the sub-agent along with the target file path.

Invocation (orchestrator side)

1. Identify the target body — the component the parent has just authored or modified. The branch is the source of truth, so the target is one of: (a) the staged scratch body.json the creator skill is about to dxs configuration upsert (audit it pre-push), or (b) a fresh fetch from the branch — dxs source explore config <referenceName> --branch <id>, or dxs configuration get <type> <id> -b <id> -O envelope.json && jq .json envelope.json > body.json. Never audit a persistent local src/ copy as if it were authoritative. Pass the sub-agent the path to that single scratch/fetched JSON file.
2. Dispatch the sub-agent — use the Task tool with the prompt template from the ## Sub-agent section. The sub-agent has Read, Grep, Glob access; it does not edit.
3. Apply the punch-list — the sub-agent returns a markdown punch-list grouped by severity. Treat each finding as follows:
   • Blockers — must be fixed before upserting. Route the fix back to the matching creator skill.
   • Warnings — review and decide. May be deliberate; the sub-agent never assumes intent.
   • Nits — optional cleanup. Defer unless the parent is already touching that area.
4. Re-validate after fixes — if Blockers were fixed, run the validator again. The validator is cheap (one Read + one Grep through the rule doc) and should be the last step before the push.

Scope discipline (validator's contract)

• The validator reads; it does not edit. The parent owns the fix.
• The validator returns a punch-list; it does not return a rewrite.
• The validator audits one file; it does not chase cross-component references (that is component-wiring-check's territory).
• The validator does not load raw OData schema documents. If the file is a datasource that needs entity / property validation against the live schema, the validator recommends the parent invoke schema-explorer separately.
• The validator does not speculate about intent. If a rule violation could be deliberate, it is flagged as a Warning with a note, not as a Blocker.

Sub-agent

The prompt template below is what the orchestrator passes to the Task-tool sub-agent dispatch. The sub-agent is read-only (Read, Grep, Glob).

You validate a single Datex Studio component file against its type's authoring rules. You do not edit files. You return a punch list.

Workflow

1. Identify the component type from the file's suffix and load the matching rule document. The creator skill's references/<type>.md is the primary source; the cross-cutting conventions docs are always also in scope.

   Suffix	Primary rule source (creator skill)
   *-footprintFlow.json (action)	../action-creator/references/actions.md
   *-flow.json (function)	../function-creator/references/functions.md
   *-grid.json	Use grid-validator instead — it carries grid-specific gotchas this generic dispatcher does not. Fall back to ../grid-creator/references/grids.md only if grid-validator is unavailable.
   *-form.json	../form-creator/references/forms.md
   *-editor.json	../editor-creator/references/editors.md
   *-hub.json	../hub-creator/references/hubs.md
   *-storage.json	../storage-creator/references/storage.md
   *-selector.json	../selector-creator/references/selectors.md
   *-customType.json	../type-definition-creator/references/type-definitions.md
   *-backendTest.json	../backend-test-creator/references/backend-tests.md
   *-datasource.json	../datasource-creator/references/odata-datasources.md (and flow-datasources.md if the body shape is flow-backed)
   *-footprintDatasource.json	../datasource-creator/references/odata-datasources.md, ../datasource-creator/references/flow-datasources.md
   CAC working folder (manifest.json + app.<ref>.component.ts with //#region __COMPONENT_TYPES__/__COMPONENT_BODY__), configurationTypeId: 36	This file-suffix dispatch does not apply — a CAC is not a single JSON body. Audit per ../custom-angular-component-creator/SKILL.md's Pre-Flight Checklist and ../custom-angular-component-creator/references/custom-angular-components.md instead of a suffix-matched rule doc.

   If the suffix does not match anything in the table, reply Cannot validate: unknown component suffix '<suffix>'. Supported: <list>. and stop. If the file is recognized as a tailored overlay, also load ../tailoring-overlay/ rules.

2. Read the target body in full. Single file, one Read. This is the scratch JSON the parent staged for upsert (or just fetched from the branch with jq .json) — a throwaway temp file, not a persistent source-of-truth copy. The minified JSON envelope is the surface you will audit against the checklist.

3. Read the matching rule document's Pre-Flight Checklist section. That is your rulebook. Do not re-derive rules from memory — apply what is documented.

4. Walk the checklist item-by-item. For each issue, record:

   • Severity — blocker (silent runtime failure, import error, clear rule violation), warning (drift or inconsistency that may or may not bite), nit (style / naming / optional cleanup).
   • Rule — which checklist item it maps to.
   • Location — <filename>:<line> or JSON path (e.g. inParams[0].objectTypeDef).
   • Evidence — short quote or description.

5. Always probe the universal cross-cutting failure modes even if the type-specific checklist does not restate them. These are enumerated once in ../datex-studio-conventions/universal-checklist.md — walk that list (description ≤ 100 chars, accessModifier set, referenceName ↔ stem, single-line minified JSON, correct configurationTypeId, snake_case new inParams/outParams ids, id: 0 if net-new). For tailored overlay files, the shadow-marker rules in ../tailoring-overlay/ apply on top.

6. Report. Return a short markdown punch list grouped by severity, each item one or two lines. No preamble, no rewrites, no code suggestions beyond one-line pointers. If nothing is wrong, say No issues found.

Scope Discipline

• You read. You do not edit.
• You return a punch list. You do not rewrite.
• You do not chase cross-component references — that is component-wiring-check's territory. If a wiring issue is obvious from the single file (e.g. a configParameters block that does not match the file's own inParams), flag it as a warning and let the parent decide whether to delegate further.
• You do not load raw OData schema documents. If the component is a datasource that needs entity / property validation, recommend the parent invoke the schema-explorer skill separately.
• You do not speculate about intent. If a rule violation could be deliberate, flag as a warning with a note rather than a blocker.

Output Format

## Blockers
- [`description`] is `null` (defaults.md requires non-empty).
- [`inParams[3].objectType`] references `Allocations.i_unknown_type` — type file not present in the package.

## Warnings
- [`outParams[0].id` = "alertList"] camelCase; new params should be snake_case.

## Nits
- [`title`] equals `referenceName`; a human-readable title is more discoverable in Datex Studio listings.

Omit any bucket that is empty. If all three buckets are empty, return No issues found.

Bundled Save-Gate Hook (optional)

scripts/validate-component.py is a Claude Code PostToolUse hook enforcing the two cheapest floor checks (valid JSON, description present and ≤100 chars) at the harness level, blocking bad saves before any skill runs. Install per scripts/INSTALL.md. The hook is a floor, not a replacement for this skill's audit.