arcrun — AI workflow execution engine (clean history)

Self-hosted 開源：WASM 零件 + recipe + cypher-executor，跑在你自己的 Cloudflare。此為重建的乾淨歷史起點（移除曾誤 commit 的 GCP SA 金鑰，舊歷史保留在 richblack/arcrun 與本地 backup 分支）。含： - acr init --self-hosted installer（建 KV/R2 + codeload 拉預編譯 wasm + wrangler deploy + seed recipe） - recipe push 把關（資料外流提醒 + 打通檢查） - 19 個正當零件預編譯 wasm（claude_api/km_writer/kbdb_upsert_block 排除：違反 DECISIONS §1） - CLI / cypher-executor / registry / 完整 SDD Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-03 15:52:38 +08:00
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+canonical_id: "string_ops"
+display_name: "字串操作"
+category: "logic"
+version: "v1"
+wasi_target: "preview1"
+stability: "floating"
+runtime_compat:
+  - "cf-workers"
+  - "workerd"
+  - "wazero"
+constraints:
+  max_size_kb: 2048
+  max_cold_start_ms: 50
+  no_network_syscall: true
+  no_filesystem_syscall: true
+  io_model: "stdin_stdout_json"
+input_schema:
+  type: object
+  required: [operation, input]
+  properties:
+    operation:
+      type: string
+      enum: [upper, lower, trim, capitalize, replace, split, join, includes, starts_with, ends_with, length, substring]
+    input:
+      type: string
+    args:
+      type: object
+      description: 操作參數（依 operation 而定）
+output_schema:
+  type: object
+  properties:
+    success:
+      type: boolean
+    data:
+      type: object
+      properties:
+        result: {}
+        operation:
+          type: string
+gherkin_tests:
+  - scenario: "upper 操作"
+    given: '{"operation":"upper","input":"hello"}'
+    then_contains: '"result":"HELLO"'
+  - scenario: "replace 操作"
+    given: '{"operation":"replace","input":"hello world","args":{"from":"world","to":"u6u"}}'
+    then_contains: '"result":"hello u6u"'
+  - scenario: "不支援的 operation"
+    given: '{"operation":"unknown","input":"test"}'
+    then_contains: '{"success":false'
+tags: [builtin, data, string, transform, text]
+description: "字串操作：upper/lower/trim/capitalize/replace/split/join/includes/starts_with/ends_with/length/substring。"
+config_example: |
+  my_string_op:                           # 節點名稱（可自訂）
+    operation: "replace"                  # 運算類型（必填），可選值：upper/lower/trim/capitalize/replace/split/join/includes/starts_with/ends_with/length/substring
+    input: "hello world"                  # 輸入字串（必填）
+    args:                                 # 操作參數，依 operation 而定（選填）
+      from: "world"                       # replace 用：要被取代的子字串
+      to: "arcrun"                        # replace 用：取代後的字串