# Lh Basis Foundation

> Use when porting LinkedIn identity resolution, runtime type-guard kernels, or automation-domain payload validation — Linked Helper v2 domain-kernel contracts: person/organization/chat/message external-identifier families with hash→memberId decoding, guard-composition data models without classes, property+method-surface aggregate duck-typing, recursive message-template node validators, polymorphic list-payload guards, cross-layer DB collision error mining, source-conditional collect-info schema, interval/credit-limit guards, presence/absence discriminator pairs for campaign/action/result family splits with postpone-reason tagged unions, positional-trap CSV-import rejection taxonomies, signed result-status domains, and getDay()-compatible week-working schedule maps.

- Skill: `ryan-brosas/lh-basis-foundation` (Agent Skill, multi-file: 32 files)
- Install (CLI): `npx skillmds@latest add ryan-brosas/lh-basis-foundation`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ryan-brosas/lh-basis-foundation/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Marketing & Growth
- Author: ryan-brosas (https://skillmd.com/u/ryan-brosas)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ryan-brosas/lh-basis-foundation

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# LH Basis (Linked Helper v2.130.5 ingest): Domain-Kernel Foundation

## 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: `lh-basis`; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
- Recorded revision: `?@? (non-Git curated source)`.
- Full provenance, coverage caveats, boundaries, and preserved evidence:
  `references/index.md`.

## Topic map

- Representative topics: Identity type algebra; Hash id decoding; Guard kernel
  composition; Template node tree; List payload shapes; Collision error
  mining; Source-scoped schemas; Organization identifiers.
- 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.