# Save edited source over a hosted diagram

> Page: https://docs.plotwork.dev/api/put-user-diagrams-id-source. Index of every page: https://docs.plotwork.dev/llms.txt

Draws the source and puts the new picture in place of the diagram's, keeping its id, name, folder and stable links; the picture link changes, so the answer has the new url.

`PUT /user/diagrams/{id}/source`

## TL;DR

| Question | Answer |
|---|---|
| What does it do? | Save edited source over a hosted diagram. |
| What does it take? | A JSON body of type [`SaveDiagramSourceBody`](https://docs.plotwork.dev/api/schemas.md#savediagramsourcebody). |
| What does it return? | Status 200 with a body of type [`EditedDiagram`](https://docs.plotwork.dev/api/schemas.md#editeddiagram). |
| What can go wrong? | `400` the body is not valid; `401` not signed in; `403` the plan does not include the editor (plan.editor_not_included), the larger picture does not fit the plan (hosting.quota_exceeded), an organisation the account belongs to requires its members to publish to its library (orgs.publish_required), or the request came from an origin that may not make changes; `404` no such diagram; `409` locked (hosting.diagram_locked), saved since (diagram.version_conflict, details.currentversion), or another diagram already has this picture (diagram.duplicate_content); `413` the body is larger than the size cap, or the diagram renders larger than the plan hosts; `422` the diagram source has errors; the diagnostics are in details; `429` too many requests; `502` the diagram could not be stored; `503` hosting is not set up on this server. Every failure uses the one error envelope. |

## What it does

Draws the source and puts the new picture in place of the diagram's, keeping its id, name, folder and stable links; the picture link changes, so the answer has the new url. The replaced picture is kept as a previous version. baseVersion is the publishedAt the editor loaded: a diagram saved since is 409 diagram.version_conflict with details.currentVersion. Needs a plan with the diagram editor (403 plan.editor_not_included).

## Path parameters

| Field | Type | Required | Description |
|---|---|---|---|
| `id` | `string` | yes |  |

## Request body

The body has the type [`SaveDiagramSourceBody`](https://docs.plotwork.dev/api/schemas.md#savediagramsourcebody).

| Field | Type | Required | Description |
|---|---|---|---|
| `source` | `string` | yes | Diagram source; the first line is the header, such as flow "Title" (draw_diagram lists every kind). at least 1 character; at most 50000 characters. |
| `theme` | `"light" \| "dark" \| "auto"` | no | The color scheme to draw it in: light, dark, or auto. Left out, the theme the diagram has. |
| `baseVersion` | `integer` | yes | The diagram's publishedAt (milliseconds since the epoch) when the editor loaded it. If the diagram was saved since, the answer is 409 diagram.version_conflict with details.currentVersion. minimum 0. |

## Responses

| Status | Meaning | Body |
|---|---|---|
| 200 | The diagram as the list shows it, with warnings and changed. | [`EditedDiagram`](https://docs.plotwork.dev/api/schemas.md#editeddiagram) |
| 400 | The body is not valid. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 401 | Not signed in. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 403 | The plan does not include the editor (plan.editor_not_included), the larger picture does not fit the plan (hosting.quota_exceeded), an organisation the account belongs to requires its members to publish to its library (orgs.publish_required), or the request came from an origin that may not make changes. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 404 | No such diagram. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 409 | Locked (hosting.diagram_locked), saved since (diagram.version_conflict, details.currentVersion), or another diagram already has this picture (diagram.duplicate_content). | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 413 | The body is larger than the size cap, or the diagram renders larger than the plan hosts. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 422 | The diagram source has errors; the diagnostics are in details. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 429 | Too many requests. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 502 | The diagram could not be stored. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |
| 503 | Hosting is not set up on this server. | [`ErrorResponse`](https://docs.plotwork.dev/api/schemas.md#errorresponse) |

## Response body

A 200 answer has the type [`EditedDiagram`](https://docs.plotwork.dev/api/schemas.md#editeddiagram).

| Field | Type | Required | Description |
|---|---|---|---|
| `id` | `string` | yes | The handle for managing the diagram (delete). It is not in the link. |
| `url` | `string` | yes | The public address of the SVG. Anyone with the link can see it; the token in it cannot be guessed. |
| `name` | `string \| null` | yes | The label given at publish, or null. |
| `folder` | `string \| null` | yes | The folder it is filed in, such as `Payments/Checkout`, or null for the top level. |
| `theme` | `"light" \| "dark" \| "auto"` | yes | The color scheme it was drawn in: light, dark, or auto. |
| `bytes` | `integer` | yes | Size of the stored SVG in bytes. |
| `createdAt` | `integer` | yes | When it was first published, in milliseconds since the epoch. |
| `publishedAt` | `integer` | yes | When it was last published, in milliseconds since the epoch. Publishing the same diagram again moves it. |
| `expiresAt` | `integer \| null` | yes | When it will be deleted, in milliseconds since the epoch, or null when the plan keeps diagrams until you delete them. |
| `locked` | `boolean` | yes | True while the diagram is locked: it cannot be deleted, renamed or moved until you unlock it. A lock does not stop it expiring on a plan that expires diagrams. |
| `lockedAt` | `integer \| null` | yes | When it was locked, in milliseconds since the epoch, or null when it is not locked. |
| `warnings` | `Diagnostic[]` | yes | Quality warnings from drawing the source, as draw_diagram gives them. Empty for a restore. |
| `warnings[].code` | `"E100" \| "E101" \| "E110" \| "E111" \| "E120" \| "E121" \| "E122" \| "E123" \| "E124" \| "E125" \| "E130" \| "E131" \| "E132" \| "E133" \| "E134" \| "E135" \| "E136" \| "E137" \| "E138" \| "E139" \| "E140" \| "W200" \| "W201" \| "W202" \| "W203" \| "W204" \| "W205" \| "W206" \| "W207" \| "W500" \| "M100" \| "M101" \| "M102" \| "M103" \| "M104" \| "M110" \| "M200" \| "M201" \| "M202" \| "M203" \| "M204" \| "M205" \| "M206" \| "M207" \| "M208" \| "M209" \| "M210" \| "M211" \| "M212" \| "M213" \| "M214" \| "M215" \| "M216" \| "M217" \| "M218" \| "E300" \| "E301" \| "E302" \| "E303" \| "E304" \| "W300" \| "W301" \| "W302" \| "W303" \| "M120" \| "M220" \| "M221" \| "M222" \| "E340" \| "E341" \| "E342" \| "E343" \| "E344" \| "E345" \| "W320" \| "W321" \| "W322" \| "W323" \| "M240" \| "M241" \| "M242" \| "E360" \| "E361" \| "E362" \| "E363" \| "E364" \| "E365" \| "E366" \| "E367" \| "W330" \| "W331" \| "W332" \| "W333" \| "W334" \| "M250" \| "M251" \| "E400" \| "E401" \| "E402" \| "E403" \| "W350" \| "W351" \| "W352" \| "W353" \| "M270" \| "M271" \| "E420" \| "E421" \| "E422" \| "E423" \| "E424" \| "W360" \| "W361" \| "W362" \| "W363" \| "W364" \| "M180" \| "M280" \| "M281" \| "M282" \| "E320" \| "E321" \| "E322" \| "E323" \| "E324" \| "E325" \| "E326" \| "E327" \| "E328" \| "E329" \| "E330" \| "W310" \| "W311" \| "W312" \| "W313" \| "W314" \| "M130" \| "M131" \| "M132" \| "M230" \| "M231" \| "M232" \| "M233" \| "M234" \| "M235" \| "M236" \| "M237" \| "M238" \| "E380" \| "E381" \| "E382" \| "E383" \| "W340" \| "W341" \| "W342" \| "W343" \| "M260" \| "I100" \| "I101" \| "I102" \| "I103" \| "I104" \| "I105" \| "I200" \| "I201" \| "I202" \| "I203" \| "I204" \| "I206" \| "R100" \| "R101" \| "R200" \| "R201" \| "R202" \| "R203" \| "R204" \| "R205" \| "R206" \| "R207" \| "S100" \| "S200" \| "S101" \| "S102" \| "S103" \| "S104" \| "S201" \| "S202" \| "S203"` | yes | Stable code to branch on; E-codes are errors, W-codes are warnings. |
| `warnings[].severity` | `"error" \| "warning"` | yes | Errors stop rendering; warnings never do. |
| `warnings[].message` | `string` | yes | What is wrong, in one sentence. |
| `warnings[].line` | `integer` | yes | 1-based line in the submitted source. minimum 1. |
| `warnings[].column` | `integer` | yes | 1-based column in that line. minimum 1. |
| `warnings[].length` | `integer` | yes | Number of characters the problem covers. minimum 1. |
| `warnings[].hint` | `string \| null` | yes | A concrete suggestion for fixing it, or null. |
| `changed` | `boolean` | yes | False when the source draws the picture the diagram already has: nothing was stored and no version was kept. |

## See also

| Doc | Why |
|---|---|
| [API reference](https://docs.plotwork.dev/api/reference.md) | Every endpoint, and the error envelope |
| [Schemas](https://docs.plotwork.dev/api/schemas.md) | Every request and response type |
| [Tool reference](https://docs.plotwork.dev/mcp/tools.md) | The operations as callable tools |