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Zinc stores package facts, exact work bytes, and current pointers.

It sits over Limbo and works with Circuitry and packages:

Layer	Responsibility
Circuitry	Confirms shaped YAML and variable flow.
Zinc	Stores package facts, fragments, heads, and config.
Packages	Provide software, settings, shapes, scripts, and docs.
Limbo	Stores rows and bytes.

Main pages

Page	Use it for
Architecture	How the layers fit together.
Fragments and Heads	What Zinc stores and why.
Packages	Package identity and manifest facts.
Package Software	How packages run through a file boundary.
Shapes	How Zinc stores and confirms shape files.
Executor	The run loop that advances work.
URI Reference	zinc:// paths for reading store and package facts.
Update	Checking for and applying Zinc updates.

Boundary

Zinc remembers:

• package name, version, root, and source facts
• raw shape bytes
• package request bytes
• package result bytes
• fragment and head identities
• opaque config values

Zinc does not interpret package settings, model responses, shell behavior, provider behavior, or output schemas.