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: "if_control"
+display_name: "條件判斷"
+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: [condition]
+  properties:
+    condition:
+      type: string
+      description: 條件運算式，支援 key（truthy）、key == value、key > number、key < number
+    input:
+      type: object
+      description: 條件運算式中參照的變數字典
+output_schema:
+  type: object
+  properties:
+    success:
+      type: boolean
+    data:
+      type: object
+      properties:
+        result:
+          type: boolean
+        branch:
+          type: string
+          enum: ["true", "false"]
+gherkin_tests:
+  - scenario: "條件成立走 true 分支"
+    given: '{"condition":"status == active","input":{"status":"active"}}'
+    then_contains: '"branch":"true"'
+  - scenario: "條件不成立走 false 分支"
+    given: '{"condition":"status == active","input":{"status":"inactive"}}'
+    then_contains: '"branch":"false"'
+  - scenario: "缺少 condition"
+    given: '{"input":{"status":"active"}}'
+    then_contains: '{"success":false'
+tags: [builtin, control, if, condition, branch]
+description: "評估條件運算式，依結果路由到 true 或 false 分支。"
+config_example: |
+  my_if:                                    # 節點名稱（可自訂）
+    condition: "status == active"           # 條件運算式（必填）
+    input:                                  # 條件運算式中參照的變數字典（選填）
+      status: "{{upstream.status}}"