# at.atjam.signup

> Published by [atjam.at](https://lexicon.garden/identity/did:plc:b5bxdq5jyv3tvkyscu42xr7u)

✓ This is the authoritative definition for this NSID.

## Description

A declaration of intent to participate in a specific round. The participant's DID is implicit (the record creator). When the round's joinMode is 'hosted' or 'network', a signup is only valid for readers when it strong-refs an at.atjam.invitation written by a valid inviter.

## Links

- [View on Lexicon Garden](https://lexicon.garden/lexicon/did:plc:b5bxdq5jyv3tvkyscu42xr7u/at.atjam.signup)
- [Documentation](https://lexicon.garden/lexicon/did:plc:b5bxdq5jyv3tvkyscu42xr7u/at.atjam.signup/docs)
- [Examples](https://lexicon.garden/lexicon/did:plc:b5bxdq5jyv3tvkyscu42xr7u/at.atjam.signup/examples)

## Definitions

### `at.atjam.signup`

**Type**: `record`

Declares the record creator's intent to participate in the referenced round.

**Key**: `tid`

| Property | Type | Required | Description |
|----------|------|----------|-------------|
| `note` | `string` | No | Optional note from the participant (e.g. what they plan to do). |
| `round` | `ref` → `com.atproto.repo.strongRef` | Yes | Strong-ref to the at.atjam.round record. |
| `createdAt` | `string` (datetime) | Yes |  |
| `invitation` | `ref` → `com.atproto.repo.strongRef` | No | Strong-ref to an at.atjam.invitation that authorizes this signup. Required by readers when round.joinMode is 'hosted' or 'network'; ignored when 'open'. The invitation's invitee DID MUST match this signup's creator DID — consumers validate this relationship. |

## Raw Schema

```json
{
  "id": "at.atjam.signup",
  "defs": {
    "main": {
      "key": "tid",
      "type": "record",
      "record": {
        "type": "object",
        "required": [
          "round",
          "createdAt"
        ],
        "properties": {
          "note": {
            "type": "string",
            "maxLength": 3000,
            "description": "Optional note from the participant (e.g. what they plan to do).",
            "maxGraphemes": 300
          },
          "round": {
            "ref": "com.atproto.repo.strongRef",
            "type": "ref",
            "description": "Strong-ref to the at.atjam.round record."
          },
          "createdAt": {
            "type": "string",
            "format": "datetime"
          },
          "invitation": {
            "ref": "com.atproto.repo.strongRef",
            "type": "ref",
            "description": "Strong-ref to an at.atjam.invitation that authorizes this signup. Required by readers when round.joinMode is 'hosted' or 'network'; ignored when 'open'. The invitation's invitee DID MUST match this signup's creator DID — consumers validate this relationship."
          }
        }
      },
      "description": "Declares the record creator's intent to participate in the referenced round."
    }
  },
  "$type": "com.atproto.lexicon.schema",
  "lexicon": 1,
  "description": "A declaration of intent to participate in a specific round. The participant's DID is implicit (the record creator). When the round's joinMode is 'hosted' or 'network', a signup is only valid for readers when it strong-refs an at.atjam.invitation written by a valid inviter."
}
```