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.agents/skills/cloudflare-deploy/references/wrangler/configuration.md

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+# Wrangler Configuration
+
+Configuration reference for wrangler.jsonc (recommended).
+
+## Config Format
+
+**wrangler.jsonc recommended** (v3.91.0+) - provides schema validation.
+
+```jsonc
+{
+  "$schema": "./node_modules/wrangler/config-schema.json",
+  "name": "my-worker",
+  "main": "src/index.ts",
+  "compatibility_date": "2025-01-01",  // Use current date
+  "vars": { "API_KEY": "dev-key" },
+  "kv_namespaces": [{ "binding": "MY_KV", "id": "abc123" }]
+}
+```
+
+## Field Inheritance
+
+Inheritable: `name`, `main`, `compatibility_date`, `routes`, `triggers`
+Non-inheritable (define per env): `vars`, bindings (KV, D1, R2, etc.)
+
+## Environments
+
+```jsonc
+{
+  "name": "my-worker",
+  "vars": { "ENV": "dev" },
+  "env": {
+    "production": {
+      "name": "my-worker-prod",
+      "vars": { "ENV": "prod" },
+      "route": { "pattern": "example.com/*", "zone_name": "example.com" }
+    }
+  }
+}
+```
+
+Deploy: `wrangler deploy --env production`
+
+## Routing
+
+```jsonc
+// Custom domain (recommended)
+{ "routes": [{ "pattern": "api.example.com", "custom_domain": true }] }
+
+// Zone-based
+{ "routes": [{ "pattern": "api.example.com/*", "zone_name": "example.com" }] }
+
+// workers.dev
+{ "workers_dev": true }
+```
+
+## Bindings
+
+```jsonc
+// Variables
+{ "vars": { "API_URL": "https://api.example.com" } }
+
+// KV
+{ "kv_namespaces": [{ "binding": "CACHE", "id": "abc123" }] }
+
+// D1
+{ "d1_databases": [{ "binding": "DB", "database_id": "abc-123" }] }
+
+// R2
+{ "r2_buckets": [{ "binding": "ASSETS", "bucket_name": "my-assets" }] }
+
+// Durable Objects
+{ "durable_objects": { 
+  "bindings": [{ 
+    "name": "COUNTER", 
+    "class_name": "Counter",
+    "script_name": "my-worker"  // Required for external DOs
+  }] 
+} }
+{ "migrations": [{ "tag": "v1", "new_sqlite_classes": ["Counter"] }] }
+
+// Service Bindings
+{ "services": [{ "binding": "AUTH", "service": "auth-worker" }] }
+
+// Queues
+{ "queues": {
+  "producers": [{ "binding": "TASKS", "queue": "task-queue" }],
+  "consumers": [{ "queue": "task-queue", "max_batch_size": 10 }]
+} }
+
+// Vectorize
+{ "vectorize": [{ "binding": "VECTORS", "index_name": "embeddings" }] }
+
+// Hyperdrive (requires nodejs_compat_v2 for pg/postgres)
+{ "hyperdrive": [{ "binding": "HYPERDRIVE", "id": "hyper-id" }] }
+{ "compatibility_flags": ["nodejs_compat_v2"] }  // For pg/postgres
+
+// Workers AI
+{ "ai": { "binding": "AI" } }
+
+// Workflows
+{ "workflows": [{ "binding": "WORKFLOW", "name": "my-workflow", "class_name": "MyWorkflow" }] }
+
+// Secrets Store (centralized secrets)
+{ "secrets_store": [{ "binding": "SECRETS", "id": "store-id" }] }
+
+// Constellation (AI inference)
+{ "constellation": [{ "binding": "MODEL", "project_id": "proj-id" }] }
+```
+
+## Workers Assets (Static Files)
+
+Recommended for serving static files (replaces old `site` config).
+
+```jsonc
+{
+  "assets": {
+    "directory": "./public",
+    "binding": "ASSETS",
+    "html_handling": "auto-trailing-slash",  // or "none", "force-trailing-slash"
+    "not_found_handling": "single-page-application"  // or "404-page", "none"
+  }
+}
+```
+
+Access in Worker:
+```typescript
+export default {
+  async fetch(request, env) {
+    // Try serving static asset first
+    const asset = await env.ASSETS.fetch(request);
+    if (asset.status !== 404) return asset;
+    
+    // Custom logic for non-assets
+    return new Response("API response");
+  }
+}
+```
+
+## Placement
+
+Control where Workers run geographically.
+
+```jsonc
+{
+  "placement": {
+    "mode": "smart"  // or "off"
+  }
+}
+```
+
+- `"smart"`: Run Worker near data sources (D1, Durable Objects) to reduce latency
+- `"off"`: Default distribution (run everywhere)
+
+## Auto-Provisioning (Beta)
+
+Omit resource IDs - Wrangler creates them and writes back to config on deploy.
+
+```jsonc
+{ "kv_namespaces": [{ "binding": "MY_KV" }] }  // No id - auto-provisioned
+```
+
+After deploy, ID is added to config automatically.
+
+## Advanced
+
+```jsonc
+// Cron Triggers
+{ "triggers": { "crons": ["0 0 * * *"] } }
+
+// Observability (tracing)
+{ "observability": { "enabled": true, "head_sampling_rate": 0.1 } }
+
+// Runtime Limits
+{ "limits": { "cpu_ms": 100 } }
+
+// Browser Rendering
+{ "browser": { "binding": "BROWSER" } }
+
+// mTLS Certificates
+{ "mtls_certificates": [{ "binding": "CERT", "certificate_id": "cert-uuid" }] }
+
+// Logpush (stream logs to R2/S3)
+{ "logpush": true }
+
+// Tail Consumers (process logs with another Worker)
+{ "tail_consumers": [{ "service": "log-worker" }] }
+
+// Unsafe bindings (access to arbitrary bindings)
+{ "unsafe": { "bindings": [{ "name": "MY_BINDING", "type": "plain_text", "text": "value" }] } }
+```
+
+## See Also
+
+- [README.md](./README.md) - Overview and commands
+- [api.md](./api.md) - Programmatic API
+- [patterns.md](./patterns.md) - Workflows
+- [gotchas.md](./gotchas.md) - Common issues