OmniRoute/docs/i18n/phi/src/lib/a2a/README.md

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OmniRoute A2A Server (Filipino)

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Agent-to-Agent Protocol v0.3— Nagbibigay-daan sa sinumang ahente ng AI na gamitin ang OmniRoute bilang isang intelligent na ahente sa pagruruta sa pamamagitan ng JSON-RPC 2.0.

Inilalantad ng A2A Server ang OmniRoute bilang isangfirst-class agentna maaaring matuklasan ng ibang mga ahente, magtalaga ng mga gawain, at makipagtulungan sa paggamit ng A2A Protocol.---

Arkitektura

┌──────────────────────────────────────────────────────────────────┐
│                    Orchestrator Agent                             │
│        (LangChain, CrewAI, AutoGen, Custom Agent)                │
└──────────────────────┬───────────────────────────────────────────┘
                       │  1. GET /.well-known/agent.json  (discover)
                       │  2. POST /a2a  (JSON-RPC 2.0)
                       ▼
┌──────────────────────────────────────────────────────────────────┐
│                     OmniRoute A2A Server                         │
│  ┌────────────────┐  ┌────────────────┐  ┌───────────────────┐  │
│  │  Task Manager  │  │  Skill Engine  │  │  SSE Streaming    │  │
│  │  (lifecycle)   │──│  (registry)    │──│  (real-time)      │  │
│  └────────────────┘  └────────┬───────┘  └───────────────────┘  │
│                               │                                  │
│  Skills:                      │                                  │
│    ├─ smart-routing ──────────┤  ┌────────────────────────────┐  │
│    └─ quota-management ───────┘  │  Routing Decision Logger   │  │
│                                  └────────────────────────────┘  │
└──────────────────────────────────────────────────────────────────┘
                       │
                       ▼  OmniRoute Gateway (internal)
              /v1/chat/completions, /api/combos, /api/usage/quota

Mabilis na Simula

Agent Discovery

Ang bawat A2A-compatible na ahente ay naglalantad ngAgent Cardsa /.well-known/agent.json:```bash curl http://localhost:20128/.well-known/agent.json


**Tugon:**```json
{
  "name": "OmniRoute",
  "description": "Intelligent AI gateway with auto-routing across 50+ providers",
  "url": "http://localhost:20128/a2a",
  "version": "1.8.1",
  "capabilities": {
    "streaming": true,
    "pushNotifications": false
  },
  "skills": [
    {
      "id": "smart-routing",
      "name": "Smart Routing",
      "description": "Routes prompts through OmniRoute intelligent pipeline",
      "tags": ["routing", "llm", "multi-provider", "cost-optimization"],
      "examples": [
        "Write a hello world in Python",
        "Explain quantum computing using the cheapest provider"
      ]
    },
    {
      "id": "quota-management",
      "name": "Quota Management",
      "description": "Natural-language queries about provider quotas",
      "tags": ["quota", "analytics", "cost"],
      "examples": [
        "Which provider has the most quota remaining?",
        "Suggest a free combo for coding"
      ]
    }
  ],
  "authentication": {
    "schemes": ["bearer"],
    "apiKeyHeader": "Authorization"
  }
}

JSON-RPC 2.0 Methods

message/send — Synchronous Execution

Magpadala ng mensahe sa isang kasanayan at tanggapin ang kumpletong tugon.```bash curl -X POST http://localhost:20128/a2a
-H "Content-Type: application/json"
-H "Authorization: Bearer YOUR_KEY"
-d '{ "jsonrpc": "2.0", "id": "1", "method": "message/send", "params": { "skill": "smart-routing", "messages": [{"role": "user", "content": "Write a Python hello world"}], "metadata": {"model": "auto", "combo": "fast-coding"} } }'


**Tugon:**```json
{
  "jsonrpc": "2.0",
  "id": "1",
  "result": {
    "task": { "id": "a1b2c3d4-...", "state": "completed" },
    "artifacts": [{ "type": "text", "content": "print('Hello, World!')" }],
    "metadata": {
      "routing_explanation": "Selected claude-sonnet via provider \"anthropic\" (latency: 1200ms, cost: $0.0030)",
      "cost_envelope": { "estimated": 0.005, "actual": 0.003, "currency": "USD" },
      "resilience_trace": [
        { "event": "primary_selected", "provider": "anthropic", "timestamp": "2026-03-04T..." }
      ],
      "policy_verdict": { "allowed": true, "reason": "within budget and quota limits" }
    }
  }
}

message/stream — SSE Streaming

Kapareho ng mensahe/ipadala ngunit ibinabalik ang Mga Kaganapang Ipinadala ng Server para sa real-time na streaming.```bash curl -N -X POST http://localhost:20128/a2a
-H "Content-Type: application/json"
-H "Authorization: Bearer YOUR_KEY"
-d '{ "jsonrpc": "2.0", "id": "1", "method": "message/stream", "params": { "skill": "smart-routing", "messages": [{"role": "user", "content": "Explain quantum computing"}] } }'


**Mga Kaganapan sa SSE:**```
data: {"jsonrpc":"2.0","method":"message/stream","params":{"task":{"id":"...","state":"working"},"chunk":{"type":"text","content":"Quantum computing..."}}}

: heartbeat 2026-03-04T21:00:00Z

data: {"jsonrpc":"2.0","method":"message/stream","params":{"task":{"id":"...","state":"completed"},"metadata":{...}}}

tasks/get — Query Task Status

curl -X POST http://localhost:20128/a2a \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_KEY" \
  -d '{"jsonrpc":"2.0","id":"2","method":"tasks/get","params":{"taskId":"TASK_UUID"}}'

tasks/cancel — Cancel a Running Task

curl -X POST http://localhost:20128/a2a \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_KEY" \
  -d '{"jsonrpc":"2.0","id":"3","method":"tasks/cancel","params":{"taskId":"TASK_UUID"}}'

Skills Reference

smart-routing

Ang mga ruta ay nag-uudyok sa pamamagitan ng intelligent na pipeline ng OmniRoute na may ganap na pagmamasid.

Mga Parameter (sa metadata):

Parameter Uri Default Paglalarawan
modelo string "awto" Target na modelo (hal., claude-sonnet-4, gpt-4o, auto)
combo string aktibong combo Tukoy na combo na dadaan sa
badyet numero wala Pinakamataas na halaga sa USD para sa kahilingang ito
gampanin string wala Pahiwatig ng tungkulin ng gawain: coding, review, planning, analysis, debugging, documentation

Pagbabalik:

Patlang Paglalarawan
artifacts[].content Ang teksto ng tugon ng LLM
metadata.routing_explanation Nababasa ng tao na paliwanag ng desisyon sa pagruruta
metadata.cost_envelope Tinantyang vs aktwal na gastos sa currency
metadata.resilience_trace Array ng mga kaganapan (primary_selected, fallback_needed, atbp.)
metadata.policy_verdict Kung pinayagan ang kahilingan at bakit ### quota-management

Sumasagot sa mga query sa natural na wika tungkol sa mga quota ng provider.

Mga uri ng query (hinuha mula sa nilalaman ng mensahe):

Pattern ng Query Uri ng Tugon
Naglalaman ng "ranggo", "pinaka quota", "pinakamahusay" Niraranggo ang mga provider ayon sa natitirang quota
Naglalaman ng "libre", "suggest" Naglilista ng mga libreng combo o nagmumungkahi ng mga free-tier na provider
Default Buong buod ng quota na may mga babala para sa mga provider na mababa ang quota ---

Task Lifecycle

submitted ──→ working ──→ completed
                       ──→ failed
              ──────────→ cancelled
Estado Paglalarawan
naisumite Nagawa ang gawain, nakapila para sa pagpapatupad
nagtatrabaho Ang handler ng kasanayan ay nagsasagawa ng
nakumpleto Nagtagumpay ang pagpapatupad, magagamit ang mga artifact
nabigo Nabigo ang pagpapatupad o nag-expire ang gawain (TTL: 5 min default)
kinansela Kinansela ng kliyente sa pamamagitan ng tasks/cancel
  • Terminal states: completed, failed, cancelled (walang karagdagang transition)
  • Ang mga nag-expire na gawain sa isumite o gumagana ay awtomatikong minarkahan bilang bigo
  • Ang mga gawain ay kinokolekta ng basura pagkatapos ng 2× TTL---

Client Examples

Python — Orchestrator Agent

"""
A2A Client — Python example.
Discovers OmniRoute agent, sends a task, and processes the result.
"""
import requests
import json

BASE_URL = "http://localhost:20128"
API_KEY = "your-api-key"
HEADERS = {
    "Content-Type": "application/json",
    "Authorization": f"Bearer {API_KEY}",
}

# 1. Discover agent capabilities
agent_card = requests.get(f"{BASE_URL}/.well-known/agent.json").json()
print(f"Agent: {agent_card['name']} v{agent_card['version']}")
print(f"Skills: {[s['id'] for s in agent_card['skills']]}")

# 2. Send a smart-routing task
response = requests.post(f"{BASE_URL}/a2a", headers=HEADERS, json={
    "jsonrpc": "2.0",
    "id": "task-1",
    "method": "message/send",
    "params": {
        "skill": "smart-routing",
        "messages": [{"role": "user", "content": "Write a Python quicksort implementation"}],
        "metadata": {
            "model": "auto",
            "combo": "fast-coding",
            "budget": 0.10,
        }
    }
})
result = response.json()["result"]
print(f"\n📝 Response: {result['artifacts'][0]['content'][:200]}...")
print(f"🔀 Routing: {result['metadata']['routing_explanation']}")
print(f"💰 Cost: ${result['metadata']['cost_envelope']['actual']}")
print(f"🛡️ Policy: {result['metadata']['policy_verdict']['reason']}")

# 3. Query quota status
quota_resp = requests.post(f"{BASE_URL}/a2a", headers=HEADERS, json={
    "jsonrpc": "2.0",
    "id": "task-2",
    "method": "message/send",
    "params": {
        "skill": "quota-management",
        "messages": [{"role": "user", "content": "Which provider has the most quota remaining?"}],
    }
})
quota_result = quota_resp.json()["result"]
print(f"\n📊 Quota: {quota_result['artifacts'][0]['content']}")

TypeScript — Multi-Agent Orchestrator

/**
 * A2A Client — TypeScript example.
 * Shows agent discovery, task delegation, and streaming.
 */

const BASE_URL = "http://localhost:20128";
const API_KEY = "your-api-key";

interface JsonRpcResponse<T = any> {
  jsonrpc: "2.0";
  id: string | number;
  result?: T;
  error?: { code: number; message: string };
}

async function a2aCall<T>(method: string, params: Record<string, any>): Promise<T> {
  const resp = await fetch(`${BASE_URL}/a2a`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${API_KEY}`,
    },
    body: JSON.stringify({
      jsonrpc: "2.0",
      id: `${method}-${Date.now()}`,
      method,
      params,
    }),
  });
  const json: JsonRpcResponse<T> = await resp.json();
  if (json.error) throw new Error(`[${json.error.code}] ${json.error.message}`);
  return json.result!;
}

// ── Agent Discovery ──
const agentCard = await fetch(`${BASE_URL}/.well-known/agent.json`).then((r) => r.json());
console.log(`Connected to: ${agentCard.name} (${agentCard.skills.length} skills)`);

// ── Smart Routing: Send a coding task ──
const routingResult = await a2aCall("message/send", {
  skill: "smart-routing",
  messages: [{ role: "user", content: "Implement a Redis cache wrapper in TypeScript" }],
  metadata: { model: "claude-sonnet-4", role: "coding" },
});
console.log("Response:", routingResult.artifacts[0].content);
console.log("Provider:", routingResult.metadata.routing_explanation);

// ── Quota Management: Find free alternatives ──
const quotaResult = await a2aCall("message/send", {
  skill: "quota-management",
  messages: [{ role: "user", content: "Suggest free combos for documentation" }],
});
console.log("Free combos:", quotaResult.artifacts[0].content);

// ── Streaming: Real-time response ──
const streamResp = await fetch(`${BASE_URL}/a2a`, {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    Authorization: `Bearer ${API_KEY}`,
  },
  body: JSON.stringify({
    jsonrpc: "2.0",
    id: "stream-1",
    method: "message/stream",
    params: {
      skill: "smart-routing",
      messages: [{ role: "user", content: "Explain microservices architecture" }],
    },
  }),
});

const reader = streamResp.body!.getReader();
const decoder = new TextDecoder();
while (true) {
  const { done, value } = await reader.read();
  if (done) break;
  const chunk = decoder.decode(value);
  for (const line of chunk.split("\n")) {
    if (line.startsWith("data: ")) {
      const event = JSON.parse(line.slice(6));
      if (event.params.chunk) {
        process.stdout.write(event.params.chunk.content);
      }
      if (event.params.task.state === "completed") {
        console.log("\n✅ Stream completed");
      }
    }
  }
}

Python — LangChain A2A Integration

"""
LangChain integration — Use OmniRoute A2A as a custom LLM.
"""
from langchain.llms.base import BaseLLM
from langchain.schema import LLMResult, Generation
import requests
from typing import List, Optional

class OmniRouteA2A(BaseLLM):
    base_url: str = "http://localhost:20128"
    api_key: str = ""
    model: str = "auto"
    combo: Optional[str] = None

    @property
    def _llm_type(self) -> str:
        return "omniroute-a2a"

    def _call(self, prompt: str, stop: Optional[List[str]] = None, **kwargs) -> str:
        response = requests.post(
            f"{self.base_url}/a2a",
            headers={
                "Content-Type": "application/json",
                "Authorization": f"Bearer {self.api_key}",
            },
            json={
                "jsonrpc": "2.0",
                "id": "langchain-1",
                "method": "message/send",
                "params": {
                    "skill": "smart-routing",
                    "messages": [{"role": "user", "content": prompt}],
                    "metadata": {
                        "model": self.model,
                        **({"combo": self.combo} if self.combo else {}),
                    },
                },
            },
        )
        result = response.json()["result"]
        return result["artifacts"][0]["content"]

    def _generate(self, prompts: List[str], stop=None, **kwargs) -> LLMResult:
        return LLMResult(
            generations=[[Generation(text=self._call(p, stop))] for p in prompts]
        )

# Usage
llm = OmniRouteA2A(
    base_url="http://localhost:20128",
    api_key="your-key",
    model="auto",
    combo="fast-coding",
)
result = llm("Write a Python function to merge two sorted lists")
print(result)

Go — A2A Client

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
)

const baseURL = "http://localhost:20128"
const apiKey = "your-api-key"

type JsonRpcRequest struct {
	Jsonrpc string      `json:"jsonrpc"`
	ID      string      `json:"id"`
	Method  string      `json:"method"`
	Params  interface{} `json:"params"`
}

type JsonRpcResponse struct {
	Jsonrpc string      `json:"jsonrpc"`
	ID      string      `json:"id"`
	Result  interface{} `json:"result"`
	Error   *struct {
		Code    int    `json:"code"`
		Message string `json:"message"`
	} `json:"error"`
}

func a2aCall(method string, params interface{}) (*JsonRpcResponse, error) {
	body, _ := json.Marshal(JsonRpcRequest{
		Jsonrpc: "2.0",
		ID:      "go-1",
		Method:  method,
		Params:  params,
	})

	req, _ := http.NewRequest("POST", baseURL+"/a2a", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+apiKey)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	data, _ := io.ReadAll(resp.Body)

	var result JsonRpcResponse
	json.Unmarshal(data, &result)
	return &result, nil
}

func main() {
	// Discover agent
	resp, _ := http.Get(baseURL + "/.well-known/agent.json")
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println("Agent Card:", string(body))

	// Send smart-routing task
	result, _ := a2aCall("message/send", map[string]interface{}{
		"skill":    "smart-routing",
		"messages": []map[string]string{{"role": "user", "content": "Hello from Go!"}},
		"metadata": map[string]interface{}{"model": "auto"},
	})
	out, _ := json.MarshalIndent(result.Result, "", "  ")
	fmt.Println("Result:", string(out))
}

Use Cases

🤖 Use Case 1: Multi-Agent Coding Pipeline

Ang isang ahente ng orkestra ay nagtatalaga ng pagbuo ng code sa OmniRoute, pagkatapos ay ipinapasa ang output sa isang ahente ng pagsusuri.```python def coding_pipeline(task: str): # Step 1: Generate code via OmniRoute A2A code_result = a2a_send("smart-routing", [ {"role": "user", "content": f"Write production-quality code: {task}"} ], metadata={"model": "auto", "role": "coding"}) code = code_result["artifacts"][0]["content"]

# Step 2: Review the code via OmniRoute A2A (different model)
review_result = a2a_send("smart-routing", [
    {"role": "user", "content": f"Review this code for bugs and improvements:\n\n{code}"}
], metadata={"model": "auto", "role": "review"})
review = review_result["artifacts"][0]["content"]

# Step 3: Check costs
print(f"Code cost: ${code_result['metadata']['cost_envelope']['actual']}")
print(f"Review cost: ${review_result['metadata']['cost_envelope']['actual']}")

return {"code": code, "review": review}

### 💡 Use Case 2: Quota-Aware Agent Swarm

Maraming ahente ang nagbabahagi ng quota sa pamamagitan ng OmniRoute, gamit ang kakayahan sa quota para mag-coordinate.```python
async def quota_aware_agent(agent_name: str, task: str):
    # Check quota before starting
    quota = a2a_send("quota-management", [
        {"role": "user", "content": "Which provider has the most quota remaining?"}
    ])
    print(f"[{agent_name}] {quota['artifacts'][0]['content']}")

    # Send request with budget constraint
    result = a2a_send("smart-routing", [
        {"role": "user", "content": task}
    ], metadata={"budget": 0.05})

    policy = result["metadata"]["policy_verdict"]
    if not policy["allowed"]:
        print(f"[{agent_name}] ⚠️ Budget exceeded: {policy['reason']}")
        # Fall back to free combo
        quota = a2a_send("quota-management", [
            {"role": "user", "content": "Suggest free combos"}
        ])
        print(f"[{agent_name}] Free alternatives: {quota['artifacts'][0]['content']}")

    return result

📊 Use Case 3: Real-Time Streaming Dashboard

Ang isang ahente sa pagsubaybay ay nag-stream ng mga tugon at nagpapakita ng pag-unlad sa real-time.```typescript async function streamingDashboard(prompt: string) { const response = await fetch(${BASE_URL}/a2a, { method: "POST", headers: { "Content-Type": "application/json", Authorization: Bearer ${API_KEY} }, body: JSON.stringify({ jsonrpc: "2.0", id: "dash-1", method: "message/stream", params: { skill: "smart-routing", messages: [{ role: "user", content: prompt }] }, }), });

let totalChunks = 0; const reader = response.body!.getReader(); const decoder = new TextDecoder();

while (true) { const { done, value } = await reader.read(); if (done) break;

for (const line of decoder.decode(value).split("\n")) {
  if (line.startsWith("data: ")) {
    const event = JSON.parse(line.slice(6));
    const state = event.params.task.state;

    if (state === "working" && event.params.chunk) {
      totalChunks++;
      process.stdout.write(
        `\r[Chunk ${totalChunks}] ${event.params.chunk.content.slice(0, 50)}...`
      );
    }
    if (state === "completed") {
      const meta = event.params.metadata;
      console.log(
        `\n✅ Done | Cost: $${meta?.cost_envelope?.actual || 0} | Route: ${meta?.routing_explanation || "N/A"}`
      );
    }
    if (state === "failed") {
      console.error(`\n❌ Failed: ${event.params.metadata?.error}`);
    }
  }
}

} }


### 🔁 Use Case 4: Task Polling Pattern

Para sa mga matagal nang gawain, i-poll ang status ng gawain sa halip na maghintay nang sabay-sabay.```python
import time

def poll_task(task_id: str, timeout: int = 60):
    """Poll task status until completion or timeout."""
    start = time.time()
    while time.time() - start < timeout:
        result = requests.post(f"{BASE_URL}/a2a", headers=HEADERS, json={
            "jsonrpc": "2.0",
            "id": "poll-1",
            "method": "tasks/get",
            "params": {"taskId": task_id},
        }).json()

        task = result["result"]["task"]
        state = task["state"]
        print(f"  Task {task_id[:8]}... state={state}")

        if state in ("completed", "failed", "cancelled"):
            return task
        time.sleep(2)

    # Timeout — cancel the task
    requests.post(f"{BASE_URL}/a2a", headers=HEADERS, json={
        "jsonrpc": "2.0",
        "id": "cancel-1",
        "method": "tasks/cancel",
        "params": {"taskId": task_id},
    })
    raise TimeoutError(f"Task {task_id} timed out after {timeout}s")

Error Codes

Code pare-pareho Ibig sabihin
-32700 Error sa pag-parse (di-wastong JSON)
-32600 INVALID_REQUEST Di-wastong kahilingan sa JSON-RPC o hindi awtorisadong
-32601 METHOD_NOT_FOUND Hindi alam na paraan o kasanayan
-32602 INVALID_PARAMS Nawawala o di-wastong mga parameter
-32603 INTERNAL_ERROR Nabigo ang pagpapatupad ng kasanayan
-32001 GAWAIN_HINDI_NATAGPUAN Hindi nakita ang Task ID
-32002 KUMPLETO_MAG-GAWAIN Hindi mabago ang isang nakumpletong gawain
-32003 HINDI AUTHORIZED Di-wasto o nawawala ang API key
-32004 BUDGET_EXCEEDED Ang kahilingan ay lumampas sa naka-configure na badyet
-32005 PROVIDER_UNAVAILABLE Walang available na provider ---

Authentication

Lahat ng hiling na /a2a ay nangangailangan ng isang Bearer token sa pamamagitan ng header ng Authorization:``` Authorization: Bearer YOUR_OMNIROUTE_API_KEY


Kung walang API key na naka-configure sa server (ang `OMNIROUTE_API_KEY` ay walang laman), ang pagpapatotoo ay na-bypass.---

## File Structure

src/lib/a2a/ ├── taskManager.ts # Task lifecycle (create/update/cancel/list), TTL, cleanup ├── taskExecution.ts # Generic task executor with state management ├── streaming.ts # SSE stream formatting, heartbeat, chunk/completion events ├── routingLogger.ts # Routing decision logger (stats, history, retention) └── skills/ ├── smartRouting.ts # Smart routing skill (routes via /v1/chat/completions) └── quotaManagement.ts # Quota management skill (natural-language quota queries)

src/app/a2a/ └── route.ts # Next.js API route handler (JSON-RPC 2.0 dispatch)

open-sse/mcp-server/ └── schemas/a2a.ts # Zod schemas (AgentCard, Task, JSON-RPC, SSE events)


---

## Comparison: MCP vs A2A

| Tampok | MCP Server | A2A Server |
| ----------------- | ---------------------------- | ------------------------------------------------- |
|**Protocol**| Model Context Protocol | Agent-to-Agent Protocol v0.3 |
|**Sasakyan**| stdio / HTTP | HTTP (JSON-RPC 2.0) |
|**Pagtuklas**| Listahan ng tool sa pamamagitan ng MCP | `/.well-known/agent.json` |
|**Granularity**| 16 indibidwal na tool | 2 mataas na antas ng kasanayan |
|**Pinakamahusay para sa**| Mga ahente ng IDE (Cursor, VS Code) | Multi-agent system (LangChain, CrewAI) |
|**Pag-stream**| Hindi suportado | SSE sa pamamagitan ng `mensahe/stream` |
|**Pagsubaybay sa gawain**| Hindi | Buong lifecycle (naisumite → nakumpleto) |
|**Pagmamasid**| Audit log sa bawat tool call | Sobre ng gastos + bakas ng katatagan + hatol ng patakaran |---

## Lisensya

Bahagi ng [OmniRoute](https://github.com/diegosouzapw/OmniRoute) — Lisensya ng MIT.