SimReady Add Feature

Purpose

Use this skill to add a brand-new SimReady feature under the owning package in nv_core/tiers/. A feature is a versioned runtime/use-case contract made from exact requirement IDs and optional feature dependencies.

Use nv_core/sr_specs/docs/guides/features/feature-template.md as the canonical markdown structure for new feature pages.

Do not use this skill for a new version of an existing feature. Use simready-foundation-update-feature for that.

Prerequisites

Before editing, read:

• AGENTS.md
• nv_core/sr_specs/docs/guides/guides.md
• nv_core/sr_specs/docs/guides/features/features.md
• nv_core/sr_specs/docs/guides/naming_conventions.md
• nv_core/sr_specs/docs/guides/features/feature-template.md
• nv_core/sr_specs/docs/shared/features/features.md
• existing neighboring feature markdown and JSON files for the same domain

If the feature will be added to a profile, also read nv_core/sr_specs/docs/guides/profiles/profiles.md and the target profile markdown/TOML entries.

Inputs

Collect or infer:

Input	Requirement
feature_number	Numeric ID such as 025. If absent, inspect existing feature IDs and propose the next appropriate number.
owning_tier	Tier package that owns the feature manifest and narrative page.
runtime	Uppercase runtime suffix such as STANDARD, NEWTON, PHYSX, or ISAAC. Use STANDARD only for OpenUSD-standard behavior with no runtime-specific schemas or attributes.
feature_name	Exact feature name such as FET_025_STANDARD, FET_025_NEWTON, or FET_025_PHYSX; use the FET_###_<RUNTIME> pattern for new feature work.
version	Semantic feature version, usually 0.1.0 for a new feature unless the user states otherwise.
display_name	Human-readable feature name.
runtime_promise	Concrete asset behavior the feature guarantees.
requirements	Existing requirement IDs or new requirement docs/validators needed by the feature.
dependencies	Exact feature names and semantic versions this feature depends on.
use_cases	Runtime, authoring, or validation scenarios the feature supports.
pipelines	Authoring, conversion, validation, or runtime pipelines relevant to the feature.
samples	Representative assets or explicit None when no sample exists yet.
benchmarks	Runtime tests, benchmark suites, or validation evidence, or explicit None when absent.
adapters	Feature/profile adapters that convert to or from this feature, or explicit None.
profile_targets	Optional profiles and versions that should adopt the feature.
validation_strategy	Automated validator, runtime test, manual test, or documented gap.
conform_skill_plan	New conform skill name, existing conform skill to update, or documented reason no conform skill can safely repair the feature.

Naming Rules

• Feature names must use FET_###_<RUNTIME>.
• Runtime suffixes are uppercase and should describe the runtime contract: STANDARD, NEWTON, PHYSX, ISAAC, or another explicit runtime.
• Use STANDARD for OpenUSD features that do not require additional runtime-specific attributes, schemas, or behavior.
• Do not use older compact names or base-neutral suffix names for new feature work.
• Feature versions use dotted semantic versions such as 0.1.0. Do not write bare integer feature versions in new feature markdown or manifests.
• Markdown filenames should be easy to match to the exact feature name.
• JSON manifest filenames should include the exact feature name and semantic version, such as FET_025_STANDARD-0.1.0.json.
• Matching conform skill folders use lowercase runtime suffixes, such as skills/simready-foundation-conform-fet-025-standard/.

Instructions

Use this checklist when changing the repository:

1. Inspect existing feature numbers, names, filenames, and runtime suffixes. Avoid reusing an ID or inventing a new suffix when an existing suffix matches.
2. Define the runtime promise in asset terms before choosing requirements.
3. Prefer existing requirements and validators. Add new requirement docs or validators only when the feature needs a new testable rule.
4. Create the feature markdown page under the owning tier's features/ directory from feature-template.md:
   • preserve these top-level sections: Feature, Description, Dependency Graph, Use Cases, Requirements, Pipelines, Samples, Benchmarks, and Adapters
   • replace every template placeholder with concrete content
   • if a section has no content yet, write None plus a short reason or follow-up instead of leaving placeholder text
   • describe the runtime use case in asset terms
   • list properties, dependencies, profiles, and requirements
   • link each requirement doc and validator implementation when available
   • document testing, samples, manual review, known gaps, and adapter status
5. Create the JSON manifest under the same tier's features/ directory:
   • use a filename that clearly matches the FET_###_<RUNTIME> feature name and semantic version
   • include id, version, display_name, path, and requirements
   • include dependencies only when the feature actually depends on other features
   • use exact semantic dependency versions
   • for a physics runtime feature (e.g. _PHYSX, _NEWTON, _MUJOCO), include a runtime field whose value is the exact USD physics variant-set name to Enable (PhysX, Newton, or MuJoCo); the standalone validator uses it to compose that variant before checking the feature's runtime-specific requirements. Omit runtime for STANDARD, ISAAC, MDL, and packaging features (validated on the neutral base). See the Runtime Variant Field section in guides/features/features.md.
   • avoid circular dependencies
   • keep requirements explicit when feature expansion replaces a base requirement
6. Keep the markdown requirements section and JSON requirements list synchronized.
7. Update nv_core/sr_specs/docs/shared/features/features.md with the new feature row and toctree entry.
8. Update nv_core/sr_specs/docs/shared/features/feature-dependency-graph.md when the feature has dependencies or affects common dependency diagrams.
9. Add a conform skill for the new feature when the feature can produce asset-level validation failures:
   • create skills/simready-foundation-conform-fet-###-<runtime>/SKILL.md
   • include source-of-truth feature/requirement/validator paths
   • define what the skill may repair automatically and what it must block on
   • call out required model/tool capabilities, such as vision, CAD/source data, runtime simulation, or material identity
   • update assets/openai.yaml so the skill is discoverable
   • if the feature is metadata-only, advisory-only, or cannot be repaired safely, document the reason in the feature summary and validation handoff
10. If profile adoption is requested, hand off to simready-foundation-add-profile or simready-foundation-update-profile; do not silently mutate an existing profile version.
11. Validate consistency:

• JSON parses
• manifest id and version match the requested feature name and semantic version
• every dependency feature/version exists
• every requirement ID is documented or intentionally new in the same change
• markdown contains all required template sections
• no placeholder bracket text or template instructional text remains in the new feature
• no semantic feature version remains in the new feature files
• feature markdown and index links resolve by path/name
• the matching conform skill exists or the no-conform-skill rationale is documented

Examples

Example request:

Add a new SimReady Foundation feature FET_025_STANDARD for factory connection points and wire it into feature docs and manifests.

Expected result summary:

changed_files: new docs, manifests, indexes, or validation scaffolding
validation: focused static checks and any relevant docs/build checks
remaining_gaps: requirement, validator, adapter, profile, or runtime-test follow-up

Policies

• Feature versions are immutable once published or used by a profile.
• Keep the feature focused on one runtime promise.
• Do not include requirements just because they are nearby; include only what the feature needs.
• If a technology-specific feature replaces a neutral/base requirement, list the full replacement requirement set explicitly instead of depending on the base feature for conflicting rules.
• Treat the per-profile TOML files in profiles/ as profile source of truth; feature docs should mention profile usage but not replace the TOML.
• Feature authoring and asset repair should evolve together. A new feature that introduces required authored USD data should normally ship with a conform skill for repairing or clearly blocking on that feature.
• Samples, benchmarks, and adapters should point to real assets, real evidence, or real modules. If they are missing, document the gap plainly.
• Runtime-specific feature docs must avoid placeholder requirements. If the runtime schema or runtime behavior is unknown, stop and report the exact missing source needed.

Limitations

• Do not mutate published feature or profile versions in place.
• Do not invent requirement IDs or validator behavior when the contract is ambiguous; record the question.
• Do not skip index, manifest, validation, or downstream follow-up notes.

Troubleshooting

• Error: the new concept overlaps an existing artifact. Solution: update the existing capability, requirement, feature, profile, or adapter instead.
• Error: names or IDs conflict. Solution: re-check naming conventions and nearby indexes before editing further.
• Error: validation strategy is unclear. Solution: document deferred validation and the exact follow-up skill.

Resources

• assets/openai.yaml preserves optional UI metadata for clients that read skill display hints. It is not required for the workflow.

Summary Format

Report:

Field	Meaning
feature_name	New FET_###_<RUNTIME> feature name.
version	New integer feature version.
feature_markdown	Feature documentation path.
feature_manifest	JSON manifest path.
requirements	Requirement IDs included.
dependencies	Feature dependencies included.
samples	Sample assets added or referenced, or none.
benchmarks	Benchmarks added or referenced, or none.
adapters	Adapter paths added or referenced, or none.
profiles_updated	Profiles changed, or none.
conform_skill	New/updated conform skill path, or documented rationale for none.
validation	Checks run and remaining gaps.
next_step	Profile adoption, validator work, runtime test, or review.