# 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…

- Skill: `ryan-brosas/skills-foundation` (Agent Skill, multi-file: 59 files)
- Install (CLI): `npx skillmds@latest add ryan-brosas/skills-foundation`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ryan-brosas/skills-foundation/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: ryan-brosas (https://skillmd.com/u/ryan-brosas)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ryan-brosas/skills-foundation

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# 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.