feat(arcrun): recipe system + resumable workflow + component registry canon
Three new platform capabilities + one component (kbdb_get) to enable
real AI workflow execution through cypher binding YAML.
## Recipe System (容器 + Recipe 模式)
SDD: .agents/specs/recipe-system/
- prompt_recipe schema (Zod): fragments + inputs + assembly + output
- recipe-expander.ts: expand recipe ref → real prompt by fetching KBDB blocks
+ pulling context fields with transforms (pluck_content / extract_field / etc)
- 7 transform whitelist: json_array / to_string / join / markdown_list /
extract_field / first / pluck_content
- graph-executor hooks: detect node.data.recipe → expand → inject into ctx
- output JSON parser (with markdown fence stripping for Claude-wrapped JSON)
- Stored in RECIPES KV under prompt_recipe:{name}
## Resumable Workflow (webhook callback resume)
SDD: .agents/specs/resumable-workflow/
- WorkflowPaused class + paused-runs.ts (persist/load/consume in EXEC_CONTEXT KV, 24h TTL)
- graph-executor: detect {pending:true, task_id} → persist state → throw WorkflowPaused
- cypher-handlers: catch → return {success:true, paused:true, task_id, run_id}
- POST /workflows/resume route: consume KV state → resumeFromPaused()
- Auto-inject callback_url for claude_api nodes (PUBLIC_BASE_URL or default cypher.arcrun.dev)
- claude_api/main.go: forward callback_url to Mira daemon, default timeout 25s→120s
- Idempotent (consume = load+delete)
## Component Registry Canon
SDD: .agents/specs/component-registry-canon/
- Add POST /components/index-only endpoint (metadata-only, no wasm/sandbox)
- Backfill script (mjs): scan registry/components/*/contract.yaml → submit to KV
- register-component.sh: SSOT for local + CI hook (deploy.yml change in next commit)
- Drop R2 dead storage from submitComponent + types + wrangler
- Schema relaxed: category enum + auth/ai/platform; cold_start 50→500ms; size 2→8MB
## kbdb_get component
- registry/components/kbdb_get/: TinyGo WASM, two modes (block_id / page_name list)
- .component-builds/kbdb_get/: WASI shim worker (kbdb-get.arcrun.dev)
End-to-end validation: AI uses MCP execute_workflow with recipe ref →
cypher-executor expands prompt from KBDB schema/skill blocks + drafts →
claude_api calls Mira daemon → daemon callback fires resume route →
workflow continues. Verified with real 2KB+ Karpathy LLM Wiki draft.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
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canonical_id: "kbdb_get"
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display_name: "KBDB 讀取"
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category: "data"
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version: "v1"
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wasi_target: "preview1"
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stability: "floating"
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runtime_compat:
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- "cf-workers"
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- "workerd"
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- "wazero"
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constraints:
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max_size_kb: 2048
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max_cold_start_ms: 50
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no_network_syscall: false
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no_filesystem_syscall: true
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io_model: "stdin_stdout_json"
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input_schema:
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type: object
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required: [api_key]
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properties:
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api_key:
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type: string
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description: KBDB partner key（pk_live_xxx 或 ak_xxx）
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block_id:
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type: string
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description: 取單一 block。給 block_id 走 GET /blocks/{id}，與 page_name 二擇一
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page_name:
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type: string
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description: 按 page_name 查列表。走 GET /blocks?page_name=...&limit=N
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limit:
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type: integer
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description: page_name 模式下的最大筆數，預設 50
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default: 50
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kbdb_url:
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type: string
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description: KBDB API base（選填，預設 https://kbdb.finally.click）
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default: "https://kbdb.finally.click"
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output_schema:
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type: object
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properties:
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success:
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type: boolean
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blocks:
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type: array
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description: page_name 模式回多個 block；block_id 模式回 1 個（仍包成陣列方便下游 foreach）
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items:
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type: object
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count:
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type: integer
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description: blocks.length
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error:
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type: string
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gherkin_tests:
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- scenario: "缺 api_key"
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given: '{"page_name":"x"}'
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then_contains: '{"success":false'
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- scenario: "block_id 與 page_name 都沒給"
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given: '{"api_key":"pk_live_x"}'
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then_contains: '{"success":false'
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tags: [data, storage, kbdb, get, query, primitive]
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description: "從 KBDB 讀 block。支援兩種模式：(1) block_id 取單一 block；(2) page_name 取列表。透過 host function http_request 呼叫 KBDB GET /blocks 或 /blocks/:id。Mira wiki 合成 / 各 source workflow 讀草稿 / 查 wiki schema 都走這條。"
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config_example: |
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read_schema: # 取單一 block
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api_key: "{{secret.kbdb_key}}"
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page_name: "mira-wiki-schema"
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read_drafts: # 取列表
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api_key: "{{secret.kbdb_key}}"
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page_name: "{{prev.entity_name}}"
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limit: 100
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@@ -0,0 +1,184 @@
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// kbdb_get — 從 KBDB 讀 block（GET /blocks?page_name=... 或 GET /blocks/:id）
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// thin wrapper：透過 host function http_request 呼叫 KBDB API
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//
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//go:build tinygo
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package main
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import (
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"encoding/json"
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"io"
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"os"
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"strconv"
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"unsafe"
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)
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//go:wasmimport u6u http_request
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func hostHttpRequest(
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urlPtr uintptr, urlLen uint32,
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methodPtr uintptr, methodLen uint32,
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headersPtr uintptr, headersLen uint32,
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bodyPtr uintptr, bodyLen uint32,
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outPtr uintptr, outLenPtr uintptr,
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) uint32
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type Input struct {
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KBDBUrl string `json:"kbdb_url"` // optional
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APIKey string `json:"api_key"` // 必填
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BlockID string `json:"block_id"` // 與 page_name 二擇一
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PageName string `json:"page_name"` // 與 block_id 二擇一
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Limit int `json:"limit"` // optional, default 50
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}
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var dummy [1]byte
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func safePtr(b []byte) (uintptr, uint32) {
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if len(b) == 0 {
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return uintptr(unsafe.Pointer(&dummy[0])), 0
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}
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return uintptr(unsafe.Pointer(&b[0])), uint32(len(b))
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}
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func writeError(msg string) {
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out, _ := json.Marshal(map[string]interface{}{"success": false, "error": msg})
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os.Stdout.Write(out)
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}
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// urlEncode：簡易 query string encoder（只處理 KBDB 會用到的字元）
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// 避免引入 net/url（白名單外）
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func urlEncode(s string) string {
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var out []byte
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for i := 0; i < len(s); i++ {
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c := s[i]
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if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') ||
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c == '-' || c == '_' || c == '.' || c == '~' {
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out = append(out, c)
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} else {
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const hex = "0123456789ABCDEF"
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out = append(out, '%', hex[c>>4], hex[c&0x0f])
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}
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}
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return string(out)
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}
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func main() {
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raw, err := io.ReadAll(os.Stdin)
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if err != nil {
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writeError("failed to read stdin: " + err.Error())
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return
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}
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var input Input
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if err := json.Unmarshal(raw, &input); err != nil {
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writeError("invalid input JSON: " + err.Error())
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return
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}
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if input.APIKey == "" {
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writeError("api_key 必填")
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return
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}
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if input.BlockID == "" && input.PageName == "" {
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writeError("block_id 或 page_name 必填其一")
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return
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}
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kbdbURL := input.KBDBUrl
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if kbdbURL == "" {
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kbdbURL = "https://kbdb.finally.click"
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}
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limit := input.Limit
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if limit <= 0 {
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limit = 50
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}
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// 構造 URL：block_id 模式走 /blocks/:id（單一），page_name 模式走 /blocks?page_name=...&limit=N
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var url string
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if input.BlockID != "" {
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url = kbdbURL + "/blocks/" + urlEncode(input.BlockID)
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} else {
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url = kbdbURL + "/blocks?page_name=" + urlEncode(input.PageName) +
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"&limit=" + strconv.Itoa(limit)
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}
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headers := map[string]string{
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"Authorization": "Bearer " + input.APIKey,
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}
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headersBytes, _ := json.Marshal(headers)
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method := "GET"
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urlBytes := []byte(url)
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methodBytes := []byte(method)
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outBuf := make([]byte, 1<<20) // 1MB（list 可能很大）
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var outLen uint32
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urlPtr, urlLen := safePtr(urlBytes)
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methodPtr, methodLen := safePtr(methodBytes)
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headersPtr, headersLenU := safePtr(headersBytes)
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bodyPtr, bodyLenU := safePtr(nil)
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result := hostHttpRequest(
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urlPtr, urlLen,
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methodPtr, methodLen,
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headersPtr, headersLenU,
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bodyPtr, bodyLenU,
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uintptr(unsafe.Pointer(&outBuf[0])), uintptr(unsafe.Pointer(&outLen)),
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)
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if result != 0 {
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writeError("KBDB GET request failed (host_http_request returned non-zero)")
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return
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}
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respStr := string(outBuf[:outLen])
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// 解析回應
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if input.BlockID != "" {
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// 單一 block：KBDB 直接回 block 物件，包成 array 給下游 foreach
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var block map[string]interface{}
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if err := json.Unmarshal([]byte(respStr), &block); err != nil {
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writeError("KBDB returned non-JSON: " + respStr)
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return
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}
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if _, hasErr := block["error"]; hasErr {
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out, _ := json.Marshal(map[string]interface{}{
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"success": false, "error": block["error"],
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})
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os.Stdout.Write(out)
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return
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}
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out, _ := json.Marshal(map[string]interface{}{
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"success": true,
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"blocks": []map[string]interface{}{block},
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"count": 1,
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})
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os.Stdout.Write(out)
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return
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}
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// page_name 列表模式：KBDB 回 {"blocks": [...], "count": N}
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var listResp struct {
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Blocks []map[string]interface{} `json:"blocks"`
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Count int `json:"count"`
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Error interface{} `json:"error"`
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}
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if err := json.Unmarshal([]byte(respStr), &listResp); err != nil {
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writeError("KBDB returned non-JSON: " + respStr)
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return
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}
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if listResp.Error != nil {
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out, _ := json.Marshal(map[string]interface{}{
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"success": false, "error": listResp.Error,
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})
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os.Stdout.Write(out)
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return
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}
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out, _ := json.Marshal(map[string]interface{}{
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"success": true,
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"blocks": listResp.Blocks,
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"count": listResp.Count,
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})
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os.Stdout.Write(out)
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}
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