Merge pull request #1872 from Automattic/fix/1838-cloudflare-memory-boot

Run WordPress within Cloudflare Worker memory limits

Author: chubes4

package-lock.json

@@ -90,6 +90,7 @@
     "wp-codebox:source": "node bin/wp-codebox-source.mjs",
     "generate:browser-fanout-aggregation-runtime": "tsx scripts/generate-browser-fanout-aggregation-runtime.ts",
     "generate:fanout-aggregation-contract": "tsx scripts/generate-fanout-aggregation-contract-fixture.ts",
+    "generate:cloudflare-mdi-runtime-bundle": "node scripts/build-cloudflare-mdi-runtime-bundle.mjs",
     "smoke": "tsx scripts/run-smoke.ts",
     "test:redaction": "tsx tests/redaction.test.ts",
     "test:cloudflare-runtime": "tsx tests/cloudflare-runtime.test.ts && node ./node_modules/typescript/bin/tsc -p packages/runtime-cloudflare --noEmit",

package.json

@@ -2,7 +2,9 @@
 
 This additive integration is the first acceptance gate for [wp-codebox#1838](https://github.com/Automattic/wp-codebox/issues/1838). It compiles the current PHP 8.5 Asyncify Wasm asset for workerd, boots WordPress through Playground with the current SQLite integration release, executes PHP, and returns a Codebox runtime-command-result envelope containing the stable `wp-codebox/cloudflare-runtime-health/v1` health payload.
 
-The Worker owns Cloudflare transport and isolate lifecycle. Full WordPress initialization requires the paid-plan five-minute CPU allowance, declared as `limits.cpu_ms: 300000`; Cloudflare's fixed 128 MB isolate memory limit remains unchanged. This gate uses one Playground PHP instance per isolate; Durable Objects will serialize site mutation in a later gate. The response identifies the generic `wordpress-playground` backend and `wordpress` environment; callers do not receive Cloudflare binding or limit details. Runtime snapshots, restore, R2, serialization, and cold restoration are deferred to later gates.
+The Worker owns Cloudflare transport, PHP-WASM execution, and the caller-owned disposable SQLite cache. [MDI PR #126](https://github.com/Automattic/markdown-database-integration/pull/126), pinned at `94b9f875ffb8402d5e8eb726893a12324e20f45c`, supplies the constrained public primary runtime: normal MDI driver SQL writes are explicitly flushed to deterministic relative Markdown/JSON paths. R2 stores immutable canonical revisions and the current pointer; the Durable Object owns only the persisted lease, base-revision validation, and CAS pointer promotion. SQLite is never uploaded. This preserves cold reconstruction from canonical R2 files and concurrent mutation serialization without expanding MDI's storage-only boundary.
+
+Existing evidence covers full WordPress initialization and canonical R2 revision behavior. This update changes the source relationship from ad hoc writes to MDI's public constrained runtime, adds source-level bundle and mutation guards, and supports local packaging verification. It does not claim a new remote deployment.
 
 ## Verification
 

packages/runtime-cloudflare/README.md

@@ -5,6 +5,7 @@
   "type": "module",
   "dependencies": {
     "@automattic/wp-codebox-core": "file:../runtime-core",
+    "@php-wasm/stream-compression": "^3.1.45",
     "@php-wasm/universal": "3.1.45",
     "@php-wasm/web-8-5": "3.1.45",
     "@wp-playground/wordpress": "3.1.45"

packages/runtime-cloudflare/assets/markdown-database-integration-runtime.zip

@@ -1,7 +1,13 @@
 declare module "@php-wasm/universal" {
   export class PHP {
     constructor(runtimeId: number)
-    run(request: { code: string }): Promise<{ text: string }>
+    run(request: { code: string }): Promise<{ bytes: Uint8Array; text: string }>
+    isDir(path: string): boolean
+    listFiles(path: string): string[]
+    mkdir(path: string): void
+    readFileAsBuffer(path: string): Uint8Array
+    writeFile(path: string, data: Uint8Array): void
+    exit(code?: number): void
   }
 
   export function loadPHPRuntime(loader: {

packages/runtime-cloudflare/assets/markdown-primary-bootstrap-index.sqlite

@@ -0,0 +1,4 @@
+declare module "*.sqlite" {
+  const database: ArrayBuffer
+  export default database
+}