Version History

Overview

Canvas apps have built-in version control. Every time you publish config changes or deploy a new code bundle, an immutable version record is created with:

A content hash (SHA-256) — like a git commit SHA
A commit message (required) — describes what changed
A full config snapshot — serialized as diffable JSON files
Who published and when

You can list all versions, diff any two versions, download previous bundles, and restore (rollback) to any version instantly.

How versioning works

There are two ways a new version is created:

Action	What creates the version	What’s captured
Publish (`POST /v1/apps/{id}/publish`)	Config snapshot (sections, meta, auth, theme, etc.)	Content hash of config, message, config as JSON files
Deploy (`POST /v1/apps/{id}/deploy`)	Code bundle upload (React/JS build)	Asset manifest with file hashes, message, optional source files

Both paths create a VersionRecord in the app’s versions array. The version number auto-increments.

Content hashing

When you publish, Mixpeek generates a deterministic SHA-256 hash of your entire config snapshot. This hash changes only when the config actually changes — identical publishes produce the same hash.

v1  →  hash: d733b11021fa  →  "Initial release"
v2  →  hash: e186b986ff96  →  "feat: add custom HTML search interface"
v3  →  hash: d733b11021fa  →  "revert: back to original config"  (same hash as v1!)

Config as diffable files

Your app config is serialized into individual JSON files for each top-level key. This makes version diffs meaningful:

meta.json          →  {"title": "Product Search", "logo_url": "..."}
theme.json         →  {"colors": {"primary": "#FC5185"}}
sections.json      →  [{"type": "search", ...}]
auth_config.json   →  {"mode": "clerk", "clerk_allowed_providers": [...]}
custom_html.json   →  "<div id=\"app\">...</div>"

Listing versions

curl https://api.mixpeek.com/v1/apps/$APP_ID/versions \
  -H "Authorization: Bearer $API_KEY"

Response:

{
  "versions": [
    {
      "version": 2,
      "s3_version_id": "e186b986ff96",
      "message": "feat: add custom HTML search interface",
      "deployed_by": "int_40ed22c147907235",
      "deployed_at": "2026-03-27T13:10:00Z",
      "environment": "production"
    },
    {
      "version": 1,
      "s3_version_id": "d733b11021fa",
      "message": "Initial release",
      "deployed_by": "int_40ed22c147907235",
      "deployed_at": "2026-03-27T13:09:00Z",
      "environment": "production"
    }
  ],
  "total": 2
}

Viewing version details

Get full metadata for a specific version, including the source files snapshot and which environments it’s active in:

curl https://api.mixpeek.com/v1/apps/$APP_ID/versions/1 \
  -H "Authorization: Bearer $API_KEY"

Response:

{
  "version": 1,
  "s3_version_id": "d733b11021fa",
  "message": "Initial release",
  "deployed_by": "int_40ed22c147907235",
  "deployed_at": "2026-03-27T13:09:00Z",
  "environment": "production",
  "source_files": {
    "meta.json": "{\"title\": \"Product Search\"}",
    "theme.json": "{\"colors\": {\"primary\": \"#FC5185\"}}",
    "sections.json": "[]"
  },
  "is_active": {
    "staging": false,
    "production": true
  }
}

Diffing versions

Compare any two versions to see what changed — like git diff v1..v2:

curl https://api.mixpeek.com/v1/apps/$APP_ID/versions/1/diff/2 \
  -H "Authorization: Bearer $API_KEY"

Response:

{
  "app_id": "app_abc123",
  "from_version": 1,
  "to_version": 2,
  "summary": {
    "added": 1,
    "removed": 0,
    "modified": 0,
    "unchanged": 7
  },
  "source_diff": {
    "custom_html.json": "--- v1/custom_html.json\n+++ v2/custom_html.json\n@@ -0,0 +1 @@\n+\"<div><h1>Custom Search</h1></div>\""
  }
}

The summary counts file-level changes (based on content hashes). The source_diff provides unified diffs of the actual content — the same format as git diff.

Rollback

Quick rollback (one level)

Restore the previous published config instantly:

curl -X POST https://api.mixpeek.com/v1/apps/$APP_ID/rollback \
  -H "Authorization: Bearer $API_KEY"

Restore any version

For deploy-based versions (code bundles), restore any specific version to any environment:

curl -X POST https://api.mixpeek.com/v1/apps/$APP_ID/versions/3/restore \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"environment": "production"}'

This is instant — no rebuild required. The previous assets are always retained in S3.

Download a version’s bundle

Download the original zip bundle for any deployed version and work locally:

Download the bundle

curl https://api.mixpeek.com/v1/apps/$APP_ID/versions/2/download \
  -H "Authorization: Bearer $API_KEY"

Response:

{
  "download_url": "https://s3.amazonaws.com/...",
  "version": 2,
  "asset_prefix": "apps/my-app/dep_abc123",
  "expires_in": 3600
}

Download and extract

curl -o bundle.zip "$DOWNLOAD_URL"
unzip bundle.zip -d my-app/

Edit files locally

Make your changes to the extracted source.

Re-zip and deploy

cd my-app && zip -r ../updated.zip .
# Upload and deploy as usual (see Deploy from Code)

Git metadata

When deploying via CI/CD or the CLI, you can attach git metadata to each version for full traceability:

curl -X POST https://api.mixpeek.com/v1/apps/$APP_ID/deploy \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "source": "cli_upload",
    "bundle_s3_key": "$BUNDLE_KEY",
    "message": "fix: search results pagination",
    "git_commit_sha": "a1b2c3d4e5f6",
    "git_commit_message": "fix: search results pagination",
    "git_author": "Jane Smith <jane@example.com>"
  }'

Git metadata appears in version detail responses and Studio’s version history panel.

If you connect a GitHub repository via POST /v1/apps/{id}/connect-repo, deploys are triggered automatically on push. Git metadata is captured from the webhook payload — no manual fields needed.

Version record fields

Field	Type	Description
`version`	`int`	Auto-incrementing version number
`s3_version_id`	`string`	Content hash (publish) or S3 version ID (deploy)
`asset_prefix`	`string`	S3 path prefix for deployed assets
`asset_manifest`	`object`	Map of `{relative_path: {s3_key, hash, size}}`
`source_files`	`object`	Map of `{path: content}` for source-level diffs
`deployed_by`	`string`	Internal ID of the user who published/deployed
`deployed_at`	`string`	ISO 8601 timestamp
`environment`	`string`	`"staging"` or `"production"`
`message`	`string`	Commit message (required)
`build_duration_ms`	`int`	Build time in milliseconds (deploy only)
`git_commit_sha`	`string`	Git SHA (if provided)
`git_commit_message`	`string`	Git commit message (if provided)
`git_author`	`string`	Git author (if provided)

Canvas

​Overview

​How versioning works

​Content hashing

​Config as diffable files

​Listing versions

​Viewing version details

​Diffing versions

​Rollback

​Quick rollback (one level)

​Restore any version

​Download a version’s bundle

​Git metadata

​Version record fields

​Related

Overview

How versioning works

Content hashing

Config as diffable files

Listing versions

Viewing version details

Diffing versions

Rollback

Quick rollback (one level)

Restore any version

Download a version’s bundle

Git metadata

Version record fields

Related