Frontier Signals Workflow

Goal

Aggregate frontier discussions from multiple platforms, keep only AI Agent-related signals via AI filtering, and ingest into POST /api/webhook/signals.

Workflow

Workflow name: 前沿信号聚合（多源+AI Agent过滤）
Workflow ID: bAxNZKGq2ApUUiw9
Status: active
Trigger: every 4 hours (Schedule Trigger)
Activated at: 2026-02-23

Source Research (Endpoints + Extracted Elements)

Source	Endpoint	Node Type	Extracted Elements
Hacker News	`https://hacker-news.firebaseio.com/v0/topstories.json` + `.../item/{id}.json`	HTTP Request	`title`, `url`, `text`, `score`, `descendants`, `time`
GitHub	`https://api.github.com/search/issues`	HTTP Request	`title`, `html_url`, `body`, `comments`, `reactions`, `labels`, `updated_at`
arXiv	`https://export.arxiv.org/api/query?...`	RSS Read	`title`, `link`, `content/contentSnippet`, `pubDate/isoDate`, `categories`
Reddit	`https://www.reddit.com/r/LocalLLaMA/new.json?limit=40`	HTTP Request	`title`, `permalink`, `selftext/url`, `ups`, `num_comments`, `created_utc`
Product Hunt	`https://www.producthunt.com/feed`	RSS Read	`title`, `link`, `content/contentSnippet`, `published/updated`
Hugging Face	`https://huggingface.co/blog/feed.xml`	RSS Read	`title`, `link`, `content/contentSnippet`, `published/updated`

Why These Nodes

Schedule Trigger: periodic ingestion
HTTP Request / RSS Read: source fetching with stable machine-readable endpoints
Code: per-source normalization and schema-safe cleanup
Merge (append): multi-source union
Remove Duplicates: source + sourceUrl dedupe before/after AI
Limit: cap candidate volume before AI
LLM Chain + Structured Output Parser: relevance filtering + structured sections
If: keep only shouldKeep=true
HTTP Request (POST): write to /api/webhook/signals

Target Contract Mapping

The workflow emits payload compatible with SignalWebhookPayloadSchema:

apiKey: manually configured in node 构建 Webhook Payload
signals[]:
- source -> one of:
  - hacker_news
  - github
  - arxiv
  - hugging_face
  - reddit
  - product_hunt
- sourceUrl, title, summary, topic, tags, sections, engagement, hotScore, isHot, publishedAt, isActive

Sections are constrained to:

style: focus | debate | evidence | action | risk
max 6 sections, max 6 items per section

AI Filtering Policy

The AI node does not score ideas by novelty/reliability/feasibility. It only decides whether a signal is about AI Agent topics and then structures content for reading efficiency.

Keep (shouldKeep=true) if discussion is materially agent-related
Drop (shouldKeep=false) if clearly unrelated to AI Agent
Drop low-discussion or low-value question items (shouldKeep=false)
If information is insufficient, default to drop

High-Heat Gate（AI 前硬过滤）

筛掉占位候选 节点会在 AI 前做硬性筛选，减少低价值输入：

source-level minimum engagement:
- hacker_news >= 35
- github >= 8
- reddit >= 25
source-level freshness window:
- hacker_news <= 72h
- github <= 168h
- reddit/arxiv/hugging_face/product_hunt <= 120h
low-value question filtering:
- 求助型单问题 + 短摘要 + 低互动，直接丢弃
per-source candidate cap（AI 前限流）:
- hacker_news 6, github 6, reddit 6, arxiv 4, hugging_face 4, product_hunt 4
strict keyword gate for low-discussion sources:
- arxiv/hugging_face/product_hunt 必须命中 agent 相关关键词（如 agent, agentic, multi-agent, tool calling, mcp, 智能体）才进入 AI

HOT 判定（流程内）

清洗并映射入库字段 Code 节点会基于互动量 + 时间新鲜度计算：

hotScore：0-100
isHot：布尔值，用于页面 HOT 标签与排序优先

该判定只衡量讨论热度，不评价观点对错或质量。

DB 升级（新增 HOT 字段）

由于当前仓库默认忽略 prisma/migrations/*_* 目录，建议在数据库手动执行一次：

ALTER TABLE "signals"
ADD COLUMN IF NOT EXISTS "hotScore" INTEGER NOT NULL DEFAULT 0,
ADD COLUMN IF NOT EXISTS "isHot" BOOLEAN NOT NULL DEFAULT false;

CREATE INDEX IF NOT EXISTS "idx_signal_hot_score" ON "signals"("hotScore");
CREATE INDEX IF NOT EXISTS "idx_signal_active_hot_sort" ON "signals"("isActive", "isHot", "hotScore", "publishedAt");

Manual Configuration (No Env)

This workflow is intentionally configured without $env usage.

Node 构建 Webhook Payload:
- set apiKey to your real webhook key (replace placeholder string)
Node 发送到 Signals Webhook:
- set the target URL to your actual API base (current default is https://agentpark.fun/api/webhook/signals)

Notes

Reddit source uses JSON API with explicit User-Agent headers to reduce 403 blocking risk.
n8n_test_workflow cannot trigger schedule-only workflows via API; runtime verification should be done by waiting for scheduled execution or manual run in n8n UI.

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