---
title: "Standard Profiles"
description: "Records adopted Agent Instructions, Agent Skills, and Agent Plugins portability profiles and their immutable conformance evidence."
---

> Documentation Index
> Fetch the complete documentation index at: https://nimbus.focal.host/llms.txt
> Use this file to discover all available pages before exploring further.

# Standard Profiles

<a id="standard-profiles"></a>

The independent @skillset/registry standard-profile registry records the portable floor. Provider destination snapshots and Core capability tables stay separate: standards define portable structure while providers define native deltas and runtime evidence.

The Agent Instructions, Agent Skills, and Agent Plugins 1.0 profiles are adopted. Agent Plugins stores the complete pinned plugin.json and mcp.json JSON Schema bodies for offline validation. Each profile also owns its expected feature envelopes for adapter conformance.

Lifecycle and source applicability are the complete selection model. An adopted applicable profile renders inherently; a candidate or retired profile does not participate in normal output, locks, or claims. Workspace, plugin, and frontmatter configuration has no standards selector or opt-out. `compile.targets` remains provider-only, and a provider may consume a compatible standard-owned physical file as a recorded delta.

Every snapshot stores the byte-for-byte body fetched from an immutable raw source revision. The registry records both that revision URL and the matching current raw URL for the same repository path. The current URL is used only by explicit maintenance commands, so a comparison is between the same source format and never an extracted or normalized website response. Normal builds remain offline.

Each adopted profile points to an immutable checked-in candidate conformance receipt. Normal repository checks re-hash that receipt, match its complete profile snapshot to the current registry contract, re-hash the adoption fixture tree, and reproduce the standard-owned output bytes through the ordinary compiler path. This durability check is offline and does not require a clean Git checkout or renderer-commit ancestry; the recorded clean renderer commit remains historical evidence from the candidate run.

| Profile | Immutable revision | Current comparison source |
| --- | --- | --- |
| Agent Instructions | [`agentsmd/agents.md@d001185` README.md](https://raw.githubusercontent.com/agentsmd/agents.md/d001185d792eb6402a58e4cbef1c228b309ec25d/README.md) | [`main` README.md](https://raw.githubusercontent.com/agentsmd/agents.md/main/README.md) |
| Agent Skills | [`agentskills/agentskills@69ef37e` specification](https://raw.githubusercontent.com/agentskills/agentskills/69ef37e9424c0a7ea9dd2293b559e43ec8176379/docs/specification.mdx) | [`main` specification](https://raw.githubusercontent.com/agentskills/agentskills/main/docs/specification.mdx) |
| Agent Plugins 1.0 | [`agentplugins/agent-plugins-spec@1fc1b62` published specification](https://raw.githubusercontent.com/agentplugins/agent-plugins-spec/1fc1b6270e3cc492ec2d24ad7a34277c6d53b9c1/spec/1.0.0.md) and its `schemas/1.0.0/*.schema.json` files | The same specification and schema paths on [`main`](https://raw.githubusercontent.com/agentplugins/agent-plugins-spec/main/spec/1.0.0.md) |

The standard-profile maintenance operation compares an explicitly fetched current raw source with the immutable snapshot. Its update mode is report-only: source drift never changes a snapshot or a lifecycle state without a reviewed registry edit. Reports name the current source URL for every changed or failed snapshot and include the captured request error for failures.

Source: https://nimbus.focal.host/skillset/reference/standard-profiles/index.mdx