---
slug: "Subject"
name: "Subject"
type: "Data Structures"
layer: "Infrastructure"
ref: "Subject#433d"
sema_id: "sema:Subject#mh:SHA-256:433d8e6354d25b4350f39a8c2b06f29beac943adb62b677efa3bbb9bb5d0802c"
tags: ["Infrastructure","Data Structures"]
updated: 2026-11-11
mindscape: "bootstrap"
index_url: https://mindscape.world/scapes/bootstrap.json
url: https://mindscape.world/bootstrap/Subject/
related: ["Act","Judge","PURECheck"]
---

# Subject

The target of an operation

Layer: Infrastructure · Category: Data Structures

## Mechanism

The target entity of an observation, evaluation, or [Act](https://mindscape.world/scapes/bootstrap/Act.md). It represents the 'Who' or 'What' in a subject-object relationship.

## Invariants

—

## Failure modes

—

## Data schema

```json
{
  "type": "object",
  "required": [
    "subject_id",
    "entity_type"
  ],
  "properties": {
    "subject_id": {
      "type": "string",
      "description": "Unique identifier for the subject"
    },
    "entity_type": {
      "type": "string",
      "description": "What kind of entity (agent, artifact, system)"
    },
    "reference": {
      "type": "string",
      "description": "Pointer to the actual entity"
    }
  }
}
```

## Builds on

- [Act](https://mindscape.world/scapes/bootstrap/Act.md) (Infrastructure; References)

## Used by

- [Judge](https://mindscape.world/scapes/bootstrap/Judge.md) (Infrastructure; Accepts)
- [PURECheck](https://mindscape.world/scapes/bootstrap/PURECheck.md) (Mind; Accepts)

## Identity

- Sema ID: `sema:Subject#mh:SHA-256:433d8e6354d25b4350f39a8c2b06f29beac943adb62b677efa3bbb9bb5d0802c`
- Ref: `Subject#433d`
- Supersedes:
  - `sema:Subject#mh:SHA-256:788f7cb48e982144f15691fa0259a8b4f620e6eaf4447129c95f23d8e3008d1e`
  - `sema:Subject#mh:SHA-256:7aaa0d310dda5a0ab3ba4c5fa3ed122af604aafe3e7666a808071760b1292587`

## Links

- [Pattern page](https://mindscape.world/bootstrap/Subject/)
- [View in the interactive graph](https://mindscape.world/bootstrap/#Subject)
- [JSON](https://mindscape.world/scapes/bootstrap/Subject.json)
- [Index of all patterns](https://mindscape.world/scapes/bootstrap.json)