v5 returns a maintained profile directly and gives profile bucket definitions their own namespace-scoped resource.

### Remove search behavior from profile calls

<CodeGroup>
```bash Legacy
POST /v4/profile
{"containerTag":"user_1","q":"work preferences","threshold":0.6,"include":{}}
```

```bash v5
POST /ns/user_1/profile
{"filter":{"field":"region","operator":"eq","value":"us-west"},"buckets":["work"]}
```
</CodeGroup>

Remove legacy `q`, `threshold`, and `include`. If the caller needs query-ranked results, issue a separate v5 search request. Move `containerTag` to the path and rename `filters` to singular `filter`.

### Read the v5 profile shape

```json
{
  "profile": {
    "static": ["The user works in design"],
    "dynamic": ["The user is preparing a launch"],
    "buckets": { "work": ["Prefers concise project updates"] }
  }
}
```

`static` and `dynamic` are always returned and cannot be disabled. Omit `buckets` in the request to return every effective custom bucket; pass up to 50 names to narrow only the bucket section.

### Read bucket definitions

<CodeGroup>
```bash Legacy
POST /v4/profile/buckets
{"containerTag":"user_1"}
```

```bash v5
GET /ns/user_1/profile/buckets
```
</CodeGroup>

The response changes from key/description objects to a map:

```json
{"buckets":{"work":"Professional preferences and ongoing work"}}
```

### Add or edit namespace buckets

```bash
PUT /ns/user_1/profile/buckets
{"buckets":{"work":"Professional preferences and ongoing work"}}
```

Send one to 50 name-to-description entries. Existing namespace names are updated, new names are added, and omitted namespace buckets remain unchanged.

### Delete namespace buckets

```bash
DELETE /ns/user_1/profile/buckets
{"buckets":["work"]}
```

Names must be unique. Organization-owned buckets can appear in the effective GET response but cannot be changed or removed through namespace PUT or DELETE calls.

### Verification

- Confirm every profile response contains `static`, `dynamic`, and `buckets`.
- Compare omitted buckets with one-name and multi-name narrowing.
- Add, edit, and delete a namespace bucket without replacing omitted buckets.
- Attempt to mutate an inherited organization bucket and expect the documented error.