SYSTEMX 1.9.0-alpha.6 — Gusto HR contracts

SYSTEMX 1.9.0-alpha.6

Add an optional, portable GUSTO HR integration reference: 64 page contracts,
33 capabilities, seven roles, synthetic fixtures, schema contracts and a pinned
Gusto React SDK endpoint inventory. The host owns runtime adapters, credentials
and authorization. Default connector mode is disabled; no provider account,
service, payroll execution or active project/agent workflow is enabled.

The module includes exact SDK 0.56.6 / API 2026-06-15 provenance and its Apache
license alongside the standard's MIT code. Keep prior immutable snapshots and
adopted records when updating. See the Gusto guide and WebAppX account-free
mock workspace documentation for the phased migration.

Verification on macOS Apple Silicon:

• Public template and manifest: 188 files / 111 Markdown documents.
• Full upstream suite: 235 tests, successful with five case-sensitive filesystem
  cases skipped by their existing guards.
• Wheel and folder ZIP: all 188 distribution files match source bytes; all 30
  Gusto files are present. Third-party license is included in package data and
  wheel license metadata.
• Core reusable task, plan, context, agent and project seeds remain blank.

This is an alpha prerelease. Windows/Linux runtime, live Gusto Demo, payroll
correctness and production acceptance are not established by these checks.
The hosted Gusto Flows showcase does not supply reusable API credentials. Real
Demo access requires a developer application; no shared/public test key is
included. See the repository README and Gusto wiki guide for official sources.

SHA256SUMS covers the attached folder ZIP and wheel. The manager's separate
codeload-tag ZIP has a different digest; do not use an attached artifact's hash
as that archive's explicit pin.