How do I install the Skills Foundation skill?

Run npx skillmds@latest add ryan-brosas/skills-foundation in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Skills Foundation safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Skills Foundation?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Skills Foundation free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Skills Foundation?

ryan-brosas (@ryan-brosas) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Skills Foundation by ryan-brosas — Agent Skill

Name: Skills Foundation
Author: ryan-brosas

Skills Foundation

Use when porting anthropics/skills contracts — progressive disclosure, trigger-description authoring, validation gate + packager exclusions + multiline parsing, eval-driven description optimizer + trigger matrix report + seven-file JSON schema plane, skill eval harness + judge pipeline + review viewer, MCP eval harness + response truncation/paging contract, OOXML unpack/edit/rezip internals, docx run-merge + redline + comment anchoring + tracked-changes acceptance + redlining validator, pptx corruption ladder + chart/slide validators + slide registration + thumbnail grids + clean GC, xlsx recalc gate + formula portability, office toolkit triplication + XSD baseline-diff gate + mc:Ignorable preprocess + validator CLI family routing + pptx order-repair hook + docx ID constraint/repair, PDF form-fill fork + coordinate systems + bbox gate + structure extraction + tool ladder + validation overlay, render-verify loop, black-box script discipline, soffice AF_UNIX shim, artifact scaffold+bundle, webapp-test server…

ryan-brosas Updated Sep 17, 2026

File contents

Skills (anthropics): Agent-Skill Implementation Contracts

Foundation contract

This is a cold, source-specific foundation, not an operational procedure. It is historical, revision-pinned evidence rather than timeless guidance. Current project source, tests, requirements, and runtime behavior outrank this projection and decide what ships.

Provenance and revision

Source record: skills; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
Recorded revision: main@3b3fad9.
Full provenance, coverage caveats, boundaries, and preserved evidence: references/index.md.

Topic map

Representative topics: Skill format; Skill evaluation; DOCX editing; OOXML pipeline; PPTX creation; PPTX editing; XLSX integrity; QA.
Scope and retrieval questions: references/index.md#use-this-for.
Complete capsule chooser: references/index.md#load-the-matching-source-dump.
Detailed grouped map: references/index.md#capsule-map.
Source limitations and portability boundaries: references/index.md#boundaries.

Retrieval

Open the index, choose one capsule matching the active question, and load only that capsule. Revalidate its cited source and revision before relying on it. Do not bulk-load the inventory, treat historical claims as current truth, or apply this foundation as a procedure.

---name: skills-foundationdescription: Use when porting anthropics/skills contracts — progressive disclosure, trigger-description authoring, validation gate + packager exclusions + multiline parsing, eval-driven description optimizer + trigger matrix report + seven-file JSON schema plane, skill eval harness + judge pipeline + review viewer, MCP eval harness + response truncation/paging contract, OOXML unpack/edit/rezip internals, docx run-merge + redline + comment anchoring + tracked-changes acceptance + redlining validator, pptx corruption ladder + chart/slide validators + slide registration + thumbnail grids + clean GC, xlsx recalc gate + formula portability, office toolkit triplication + XSD baseline-diff gate + mc:Ignorable preprocess + validator CLI family routing + pptx order-repair hook + docx ID constraint/repair, PDF form-fill fork + coordinate systems + bbox gate + structure extraction + tool ladder + validation overlay, render-verify loop, black-box script discipline, soffice AF_UNIX shim, artifact scaffold+bundle, webapp-test server…---# Skills (anthropics): Agent-Skill Implementation Contracts## Foundation contractThis is a cold, source-specific foundation, not an operational procedure. It ishistorical, revision-pinned evidence rather than timeless guidance. Currentproject source, tests, requirements, and runtime behavior outrank thisprojection and decide what ships.## Provenance and revision- Source record: `skills`; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.- Recorded revision: `main@3b3fad9`.- Full provenance, coverage caveats, boundaries, and preserved evidence: `references/index.md`.## Topic map- Representative topics: Skill format; Skill evaluation; DOCX editing; OOXML pipeline; PPTX creation; PPTX editing; XLSX integrity; QA.- Scope and retrieval questions: `references/index.md#use-this-for`.- Complete capsule chooser: `references/index.md#load-the-matching-source-dump`.- Detailed grouped map: `references/index.md#capsule-map`.- Source limitations and portability boundaries: `references/index.md#boundaries`.## RetrievalOpen the index, choose one capsule matching the active question, and load onlythat capsule. Revalidate its cited source and revision before relying on it. Donot bulk-load the inventory, treat historical claims as current truth, or applythis foundation as a procedure.

Frequently asked questions