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feat: Wire A2A inter-agent messaging into orchestrator + API#45

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groupthinking merged 1 commit intomainfrom
feat/a2a-wiring
Feb 28, 2026
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feat: Wire A2A inter-agent messaging into orchestrator + API#45
groupthinking merged 1 commit intomainfrom
feat/a2a-wiring

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Connect A2A framework to agent orchestrator. Adds inter-agent context sharing after parallel execution, A2A send/log API endpoints, and frontend service methods.

- Add A2AContextMessage dataclass to AgentOrchestrator for lightweight
  inter-agent context sharing during parallel task execution
- Auto-broadcast agent results to peer agents after parallel execution
- Add send_a2a_message() and get_a2a_log() methods to orchestrator
- Add POST /api/v1/agents/a2a/send endpoint for frontend-to-agent messaging
- Add GET /api/v1/agents/a2a/log endpoint to query message history
- Extend frontend agentService with sendA2AMessage() and getA2ALog()

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot AI review requested due to automatic review settings February 28, 2026 18:05
@groupthinking groupthinking merged commit ee035ff into main Feb 28, 2026
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@groupthinking groupthinking deleted the feat/a2a-wiring branch February 28, 2026 18:05
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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the multi-agent system by introducing robust Agent-to-Agent (A2A) communication capabilities. It allows agents to share context and information seamlessly after parallel execution, and provides programmatic interfaces for sending and logging these inter-agent messages. This integration paves the way for more sophisticated and collaborative agent behaviors.

Highlights

  • A2A Inter-Agent Messaging: The core A2A (Agent-to-Agent) messaging framework has been integrated into the agent orchestrator, enabling agents to communicate and share context.
  • Automated Context Sharing: After parallel execution of agents, their outputs are now automatically broadcasted as context-share messages to other participating agents, facilitating collaborative workflows.
  • New API Endpoints: Dedicated API endpoints (/api/v1/agents/a2a/send and /api/v1/agents/a2a/log) have been added to allow external systems to send A2A messages and retrieve message logs.
  • Frontend Service Methods: New frontend service methods (sendA2AMessage and getA2ALog) were introduced to interact with the new A2A API endpoints.
Changelog
  • apps/web/src/lib/services/agent-service.ts
    • Added sendA2AMessage method to send inter-agent messages.
    • Added getA2ALog method to retrieve A2A message logs, with optional conversation filtering.
  • src/youtube_extension/backend/api/v1/router.py
    • Implemented a new POST endpoint /agents/a2a/send for sending A2A messages.
    • Implemented a new GET endpoint /agents/a2a/log for retrieving A2A message logs, supporting conversation ID and limit parameters.
  • src/youtube_extension/services/agents/adapters/agent_orchestrator.py
    • Introduced A2AContextMessage dataclass to structure inter-agent messages.
    • Added an internal _a2a_log list to store A2A messages within the orchestrator.
    • Implemented logic to automatically broadcast agent outputs as A2A context-share messages to other agents after successful parallel task execution.
    • Added send_a2a_message method to the AgentOrchestrator for sending and logging A2A messages, including delivery to recipient agents.
    • Added get_a2a_log method to the AgentOrchestrator to retrieve stored A2A messages, with filtering and limiting capabilities.
Activity
  • No human activity has been recorded on this pull request yet.
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Code Review

This pull request effectively wires up the A2A inter-agent messaging framework, adding new API endpoints and integrating context sharing into the agent orchestrator. The changes are logical and well-structured. My review focuses on improving adherence to the repository's style guide, ensuring consistency with existing patterns like dependency injection, and addressing a potential memory leak in the message logging implementation. Overall, these are solid additions that enhance the agent framework's capabilities.

Comment on lines +1230 to +1232
async def send_a2a_message(
body: dict[str, Any] = {},
):
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high

The function signature uses dict[str, Any] for the request body, which violates the style guide's requirement for "strict type hinting". Using a Pydantic model provides automatic validation, better API documentation, and improved type safety.

You should define a A2ASendMessageRequest model in models.py and use it here. For example:

# In models.py
from pydantic import BaseModel, Field
# ...
class A2ASendMessageRequest(BaseModel):
    sender: Optional[str] = "frontend"
    recipient: str
    content: dict[str, Any] = Field(default_factory=dict)
    conversation_id: Optional[str] = None

Then, you can update the function signature and body to use this model, which also allows you to remove the manual validation for recipient.

Suggested change
async def send_a2a_message(
body: dict[str, Any] = {},
):
async def send_a2a_message(
body: A2ASendMessageRequest, # Define this Pydantic model in models.py
):
References
  1. The function uses dict[str, Any] for the request body instead of a strictly typed Pydantic model, which is required by the coding standards. (link)

self.logger = logging.getLogger("agent_orchestrator")
self._agents: dict[str, BaseAgent] = {}
self._agent_types: dict[str, type[BaseAgent]] = {}
self._a2a_log: list[A2AContextMessage] = []
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high

The _a2a_log is an in-memory list that is appended to but never cleared or capped. In a long-running process, this will lead to unbounded memory growth and eventually cause performance issues or crashes. To prevent this, you should use a capped collection, such as collections.deque with a maxlen.

You'll need to from collections import deque.

Suggested change
self._a2a_log: list[A2AContextMessage] = []
self._a2a_log: "deque[A2AContextMessage]" = deque(maxlen=1000) # Using a capped collection

if not recipient:
raise HTTPException(status_code=400, detail="recipient is required")

orch = AgentOrchestrator()
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medium

AgentOrchestrator is instantiated directly. This endpoint should use the existing dependency injection pattern (Depends(get_agent_orchestrator_service)) to ensure it uses the shared global instance and maintains consistency with other endpoints. Please add orch: AgentOrchestrator = Depends(get_agent_orchestrator_service) to the function signature and remove this line.

limit: int = 50,
):
"""Return recent A2A inter-agent messages."""
orch = AgentOrchestrator()
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medium

AgentOrchestrator is instantiated directly. This endpoint should use the existing dependency injection pattern (Depends(get_agent_orchestrator_service)) to ensure it uses the shared global instance and maintains consistency with other endpoints. Please add orch: AgentOrchestrator = Depends(get_agent_orchestrator_service) to the function signature and remove this line.

Comment on lines +331 to +349
def get_a2a_log(
self,
conversation_id: str | None = None,
limit: int = 50,
) -> list[dict[str, Any]]:
"""Return recent A2A messages, optionally filtered by conversation."""
msgs = self._a2a_log
if conversation_id:
msgs = [m for m in msgs if m.conversation_id == conversation_id]
return [
{
"sender": m.sender,
"recipient": m.recipient,
"content": m.content,
"conversation_id": m.conversation_id,
"timestamp": m.timestamp,
}
for m in msgs[-limit:]
]
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medium

This function can be improved for type safety and robustness:

  1. Return Type: Returning list[dict[str, Any]] is not strictly typed. You can return list[A2AContextMessage] directly, as FastAPI can serialize dataclasses. This aligns better with the style guide's emphasis on strict typing.
  2. Slicing with Deque: If _a2a_log is converted to a deque to prevent memory leaks (as suggested in another comment), the msgs[-limit:] slice will fail when no conversation_id is provided. Deques do not support negative slicing.

Here's a revised implementation that addresses both points and is robust for both list and deque.

    def get_a2a_log(
        self,
        conversation_id: str | None = None,
        limit: int = 50,
    ) -> list[A2AContextMessage]:
        """Return recent A2A messages, optionally filtered by conversation."""
        if conversation_id:
            # Filtering creates a list, so negative slicing is safe here.
            return [m for m in self._a2a_log if m.conversation_id == conversation_id][-limit:]

        # If self._a2a_log is a deque, convert to list for slicing.
        # This is safe but could be optimized for very large deques if performance is critical.
        return list(self._a2a_log)[-limit:]
References
  1. The function returns a list[dict[str, Any]] which is not strictly typed. The suggestion improves this by returning a list of strongly-typed A2AContextMessage objects. (link)

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Pull request overview

This PR connects A2A-style inter-agent messaging to the agent orchestrator, exposes that functionality via new API v1 endpoints, and adds corresponding frontend service methods to send messages and fetch logs.

Changes:

  • Added an in-orchestrator A2A message log plus helper methods to send messages and query the log.
  • Added /api/v1/agents/a2a/send and /api/v1/agents/a2a/log endpoints for sending and inspecting A2A messages.
  • Added frontend agentService methods to call the new A2A endpoints.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File Description
src/youtube_extension/services/agents/adapters/agent_orchestrator.py Introduces A2A message dataclass, in-memory A2A log, and “broadcast” logging after parallel execution.
src/youtube_extension/backend/api/v1/router.py Adds A2A send/log endpoints under the Agents tag.
apps/web/src/lib/services/agent-service.ts Adds sendA2AMessage and getA2ALog client helpers for the new endpoints.

Comment on lines +1242 to +1248
orch = AgentOrchestrator()
msg = await orch.send_a2a_message(
sender=sender,
recipient=recipient,
content=content,
conversation_id=conversation_id,
)
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send_a2a_message/get_a2a_log create a fresh AgentOrchestrator() per request, which bypasses the app’s orchestrator singleton from get_agent_orchestrator_service() (and therefore has no registered agent types and an empty _a2a_log). This makes message delivery/log retrieval effectively non-functional across requests. Use the DI-provided orchestrator (e.g., orch: AgentOrchestrator = Depends(get_agent_orchestrator_service)) instead of instantiating a new one here.

Copilot uses AI. Check for mistakes.
Comment on lines +1231 to +1233
body: dict[str, Any] = {},
):
"""Send a context-share or tool-request message between agents."""
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Avoid using a mutable default for the request body (body: dict[str, Any] = {}), as it is shared at function definition time and can lead to surprising behavior. Prefer a required Pydantic model (recommended) or at least body: dict[str, Any] | None = None with body = body or {} inside.

Suggested change
body: dict[str, Any] = {},
):
"""Send a context-share or tool-request message between agents."""
body: dict[str, Any] | None = None,
):
"""Send a context-share or tool-request message between agents."""
body = body or {}

Copilot uses AI. Check for mistakes.
Comment on lines +200 to +212
# A2A context sharing: broadcast each agent's output to all others
if orchestration_result.success and len(orchestration_result.results) > 1:
conv_id = str(uuid.uuid4())
for sender_name, sender_result in orchestration_result.results.items():
for recipient_name in orchestration_result.results:
if recipient_name != sender_name:
msg = A2AContextMessage(
sender=sender_name,
recipient=recipient_name,
content={"type": "context_share", "output": sender_result.output},
conversation_id=conv_id,
)
self._a2a_log.append(msg)
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The “A2A context sharing” block only appends messages to _a2a_log; it doesn’t actually deliver them to recipient agents. Since none of the agents (and not even BaseAgent) define receive_context, this code currently cannot share context as described. Consider either (1) calling send_a2a_message(...) for each sender/recipient pair (and defining a receive_context contract on BaseAgent), or (2) renaming/commenting this as logging-only if that’s the intent.

Copilot uses AI. Check for mistakes.
Comment on lines 60 to +63
self.logger = logging.getLogger("agent_orchestrator")
self._agents: dict[str, BaseAgent] = {}
self._agent_types: dict[str, type[BaseAgent]] = {}
self._a2a_log: list[A2AContextMessage] = []
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_a2a_log is an in-memory list with no retention policy, and the broadcast path stores each agent’s full output for every sender/recipient pair. With a long-lived orchestrator singleton this can grow unbounded and retain large payloads (transcripts, etc.). Consider capping the log (e.g., deque with maxlen), truncating/storing summaries, or making logging opt-in via config.

Copilot uses AI. Check for mistakes.
Comment on lines +1224 to +1268
@router.post(
"/agents/a2a/send",
response_model=ApiResponse,
summary="Send an A2A message between agents",
tags=["Agents"],
)
async def send_a2a_message(
body: dict[str, Any] = {},
):
"""Send a context-share or tool-request message between agents."""
sender = body.get("sender", "frontend")
recipient = body.get("recipient")
content = body.get("content", {})
conversation_id = body.get("conversation_id")

if not recipient:
raise HTTPException(status_code=400, detail="recipient is required")

orch = AgentOrchestrator()
msg = await orch.send_a2a_message(
sender=sender,
recipient=recipient,
content=content,
conversation_id=conversation_id,
)
return ApiResponse.success({
"conversation_id": msg.conversation_id,
"timestamp": msg.timestamp,
})


@router.get(
"/agents/a2a/log",
response_model=ApiResponse,
summary="Get A2A message log",
tags=["Agents"],
)
async def get_a2a_log(
conversation_id: Optional[str] = None,
limit: int = 50,
):
"""Return recent A2A inter-agent messages."""
orch = AgentOrchestrator()
log = orch.get_a2a_log(conversation_id=conversation_id, limit=limit)
return ApiResponse.success({"messages": log, "count": len(log)})
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New A2A endpoints and orchestrator behavior are introduced here, but there are no accompanying tests. There are already unit tests covering API v1 models and orchestrator behavior in tests/; adding tests for /api/v1/agents/a2a/send, /api/v1/agents/a2a/log, and the expected context-sharing/logging semantics would help prevent regressions and keep coverage in line with repo expectations.

Copilot generated this review using guidance from repository custom instructions.
self.logger = logging.getLogger("agent_orchestrator")
self._agents: dict[str, BaseAgent] = {}
self._agent_types: dict[str, type[BaseAgent]] = {}
self._a2a_log: list[A2AContextMessage] = []
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Bug: The _a2a_log list in the singleton AgentOrchestrator is appended to without any cleanup mechanism, causing it to grow indefinitely and risk a memory leak.
Severity: HIGH

Suggested Fix

Implement a retention policy for the _a2a_log. A simple approach is to cap its size using a collections.deque with a maxlen or by manually trimming the list after each append to ensure it does not exceed a predefined limit.

Prompt for AI Agent
Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: src/youtube_extension/services/agents/adapters/agent_orchestrator.py#L63

Potential issue: The `_a2a_log` list within the `AgentOrchestrator` class accumulates
`A2AContextMessage` objects from agent-to-agent communications. Because the
`AgentOrchestrator` is instantiated as a long-lived singleton, this log grows
indefinitely without any clearing or trimming mechanism. In a production environment
with continuous operation, this unbounded growth will lead to excessive memory
consumption, eventually causing the service to crash with an out-of-memory error.

Did we get this right? 👍 / 👎 to inform future reviews.

groupthinking added a commit that referenced this pull request Mar 4, 2026
…51)

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* chore: Add generated browser profile cache and data for notebooklm.

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* feat: Add generated Chrome profile cache and code cache files and update associated profile data.

* Update `notebooklm` Chrome profile cache, code cache, GPU cache, and safe browsing data.

* chore(deps): bump the npm_and_yarn group across 4 directories with 5 updates

Bumps the npm_and_yarn group with 3 updates in the / directory: [ajv](https://github.com/ajv-validator/ajv), [hono](https://github.com/honojs/hono) and [qs](https://github.com/ljharb/qs).
Bumps the npm_and_yarn group with 3 updates in the /docs/knowledge_prototypes/mcp-servers/fetch-mcp directory: [@modelcontextprotocol/sdk](https://github.com/modelcontextprotocol/typescript-sdk), [ajv](https://github.com/ajv-validator/ajv) and [hono](https://github.com/honojs/hono).
Bumps the npm_and_yarn group with 1 update in the /scripts/archive/software-on-demand directory: [ajv](https://github.com/ajv-validator/ajv).
Bumps the npm_and_yarn group with 2 updates in the /scripts/archive/supabase_cleanup directory: [next](https://github.com/vercel/next.js) and [qs](https://github.com/ljharb/qs).


Updates `ajv` from 8.17.1 to 8.18.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.17.1...v8.18.0)

Updates `hono` from 4.11.7 to 4.12.1
- [Release notes](https://github.com/honojs/hono/releases)
- [Commits](honojs/hono@v4.11.7...v4.12.1)

Updates `qs` from 6.14.1 to 6.15.0
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.14.1...v6.15.0)

Updates `@modelcontextprotocol/sdk` from 1.25.2 to 1.26.0
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](modelcontextprotocol/typescript-sdk@v1.25.2...v1.26.0)

Updates `ajv` from 8.17.1 to 8.18.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.17.1...v8.18.0)

Updates `hono` from 4.11.5 to 4.12.1
- [Release notes](https://github.com/honojs/hono/releases)
- [Commits](honojs/hono@v4.11.7...v4.12.1)

Updates `qs` from 6.14.1 to 6.15.0
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.14.1...v6.15.0)

Updates `ajv` from 8.17.1 to 8.18.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.17.1...v8.18.0)

Updates `next` from 15.4.10 to 15.5.10
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.4.10...v15.5.10)

Updates `qs` from 6.14.1 to 6.15.0
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.14.1...v6.15.0)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: hono
  dependency-version: 4.12.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: qs
  dependency-version: 6.15.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: "@modelcontextprotocol/sdk"
  dependency-version: 1.26.0
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: hono
  dependency-version: 4.12.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: qs
  dependency-version: 6.15.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: next
  dependency-version: 15.5.10
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: qs
  dependency-version: 6.15.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>

* chore(deps): bump minimatch

Bumps the npm_and_yarn group with 1 update in the /scripts/archive/supabase_cleanup directory: [minimatch](https://github.com/isaacs/minimatch).


Updates `minimatch` from 3.1.2 to 3.1.4
- [Changelog](https://github.com/isaacs/minimatch/blob/main/changelog.md)
- [Commits](isaacs/minimatch@v3.1.2...v3.1.4)

---
updated-dependencies:
- dependency-name: minimatch
  dependency-version: 3.1.4
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>

* chore(deps): bump the npm_and_yarn group across 2 directories with 1 update

Bumps the npm_and_yarn group with 1 update in the / directory: [hono](https://github.com/honojs/hono).
Bumps the npm_and_yarn group with 1 update in the /docs/knowledge_prototypes/mcp-servers/fetch-mcp directory: [hono](https://github.com/honojs/hono).


Updates `hono` from 4.12.1 to 4.12.2
- [Release notes](https://github.com/honojs/hono/releases)
- [Commits](honojs/hono@v4.12.1...v4.12.2)

Updates `hono` from 4.12.1 to 4.12.2
- [Release notes](https://github.com/honojs/hono/releases)
- [Commits](honojs/hono@v4.12.1...v4.12.2)

---
updated-dependencies:
- dependency-name: hono
  dependency-version: 4.12.2
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: hono
  dependency-version: 4.12.2
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>

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The core pipeline previously required the Python backend to be running.
When deployed to Vercel (https://v0-uvai.vercel.app/), the backend is
unavailable, causing all video analysis to fail immediately.

Changes:
- /api/video: Falls back to frontend-only pipeline (transcribe + extract)
  when the Python backend is unreachable, with 15s timeout
- /api/transcribe: Adds Gemini fallback when OpenAI is unavailable, plus
  8s timeout on backend probe to avoid hanging on Vercel
- layout.tsx: Loads Google Fonts via <link> instead of next/font/google
  to avoid build failures in offline/sandboxed CI environments
- page.tsx: Replace example URLs with technical content (3Blue1Brown
  neural networks, Karpathy LLM intro) instead of rick roll / zoo videos
- gemini_service.py: Gate Vertex AI import behind GOOGLE_CLOUD_PROJECT
  env var to prevent 30s+ hangs on the GCE metadata probe
- agent_gap_analyzer.py: Fix f-string backslash syntax errors (Python 3.11)

https://claude.ai/code/session_015Pd3a6hinTenCNrPRGiZqE

* Potential fix for code scanning alert no. 4518: Server-side request forgery

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

* Initial plan

* Potential fix for code scanning alert no. 4517: Server-side request forgery

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

* Initial plan

* Fix review feedback: timeout cleanup, transcript_segments shape, ENABLE_VERTEX_AI boolean parsing

Co-authored-by: groupthinking <154503486+groupthinking@users.noreply.github.com>

* fix: clearTimeout in finally blocks, transcript_segments shape, ENABLE_VERTEX_AI boolean parsing

Co-authored-by: groupthinking <154503486+groupthinking@users.noreply.github.com>

* Update src/youtube_extension/services/ai/gemini_service.py

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

* Update apps/web/src/app/api/video/route.ts

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

* Update apps/web/src/app/api/video/route.ts

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

* Initial plan

* Initial plan

* Fix: move clearTimeout into .finally() to prevent timer leaks on fetch abort/error

Co-authored-by: groupthinking <154503486+groupthinking@users.noreply.github.com>

* Fix clearTimeout not called in finally blocks for AbortController timeouts

Co-authored-by: groupthinking <154503486+groupthinking@users.noreply.github.com>

* Fix: Relative URLs in server-side fetch calls fail in production - fetch('/api/transcribe') and fetch('/api/extract-events') use relative URLs which don't resolve correctly in server-side Next.js code on production deployments like Vercel.

This commit fixes the issue reported at apps/web/src/app/api/video/route.ts:101

## Bug Analysis

**Why it happens:**
In Next.js API routes running on the server (Node.js runtime), the `fetch()` API requires absolute URLs. Unlike browsers which have an implicit base URL (the current origin), server-side code has no context for resolving relative URLs like `/api/transcribe`. The Node.js fetch implementation will fail to resolve these relative paths, resulting in TypeError or connection errors.

**When it manifests:**
- **Development (localhost:3000)**: Works accidentally because the request URL contains the host
- **Production (Vercel)**: Fails because the relative URL cannot be resolved to a valid absolute URL without proper host context

**What impact it has:**
The frontend-only pipeline fallback (Strategy 2) in lines 101-132 is completely broken in production. When the backend is unavailable (common on Vercel), the code attempts to use `/api/transcribe` and `/api/extract-events` serverless functions but fails due to unresolvable relative URLs. This causes the entire video analysis endpoint to fail when the backend is unavailable.

## Fix Explanation

**Changes made:**
1. Added a `getBaseUrl(request: Request)` helper function that extracts the absolute base URL from the incoming request object using `new URL(request.url)`
2. Updated line 108: `fetch('/api/transcribe', ...)` → `fetch(`${baseUrl}/api/transcribe`, ...)`
3. Updated line 127: `fetch('/api/extract-events', ...)` → `fetch(`${baseUrl}/api/extract-events`, ...)`

**Why it solves the issue:**
- The incoming `request` object contains the full URL including protocol and host
- By constructing an absolute URL from the request, we ensure the fetch calls work in both development and production
- This approach is more reliable than environment variables because it uses the actual request context, handling reverse proxies and different deployment configurations correctly

Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
Co-authored-by: groupthinking <garveyht@gmail.com>

* Initial plan

* chore(deps): bump the npm_and_yarn group across 1 directory with 1 update

Bumps the npm_and_yarn group with 1 update in the /docs/knowledge_prototypes/mcp-servers/fetch-mcp directory: [minimatch](https://github.com/isaacs/minimatch).


Updates `minimatch` from 3.1.2 to 3.1.5
- [Changelog](https://github.com/isaacs/minimatch/blob/main/changelog.md)
- [Commits](isaacs/minimatch@v3.1.2...v3.1.5)

Updates `minimatch` from 5.1.6 to 5.1.9
- [Changelog](https://github.com/isaacs/minimatch/blob/main/changelog.md)
- [Commits](isaacs/minimatch@v3.1.2...v3.1.5)

---
updated-dependencies:
- dependency-name: minimatch
  dependency-version: 3.1.5
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: minimatch
  dependency-version: 5.1.9
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix: validate BACKEND_URL before using it

Skip backend calls entirely when BACKEND_URL is not configured or
contains an invalid value (like a literal ${...} template string).
This prevents URL parse errors on Vercel where the env var may not
be set.

https://claude.ai/code/session_015Pd3a6hinTenCNrPRGiZqE

* fix: resolve embeddings package build errors (#41)

- Create stub types for Firebase Data Connect SDK in src/dataconnect-generated/
- Fix import path from ../dataconnect-generated to ./dataconnect-generated (rootDir constraint)
- Add explicit type assertions for JSON responses (predictions, access_token)
- All 6 TypeScript errors resolved, clean build verified

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat: Gemini SDK upgrade + VideoPack schema alignment (#43)

* chore: Update generated Chrome profile cache and session data for notebooklm.

* chore: refresh notebooklm Chrome profile data, including Safe Browsing lists, caches, and session files.

* Update local application cache and database files within the NotebookLM Chrome profile.

* chore: update Chrome profile cache and Safe Browsing data files.

* feat: upgrade Gemini to @google/genai SDK with structured output, search grounding, video URL processing, and extend VideoPack schema

- Upgrade extract-events/route.ts from @google/generative-ai to @google/genai
- Add Gemini responseSchema with Type system for structured output enforcement
- Add Google Search grounding (googleSearch tool) to Gemini calls
- Upgrade transcribe/route.ts to @google/genai with direct YouTube URL processing via fileData
- Add Gemini video URL fallback chain: direct video → text+search → other strategies
- Extend VideoPackV0 schema with Chapter, CodeCue, Task models
- Update versioning shim for new fields
- Export new types from videopack __init__

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat: wire CloudEvents pipeline + Chrome Built-in AI fallback (#44)

- Add TypeScript CloudEvents publisher (apps/web/src/lib/cloudevents.ts)
  emitting standardized events at each video processing stage
- Wire CloudEvents into /api/video route (both backend + frontend strategies)
- Wire CloudEvents into FastAPI backend router (process_video_v1 endpoint)
- Add Chrome Built-in AI service (Prompt API + Summarizer API) for
  on-device client-side transcript analysis when API keys are unavailable
- Add useBuiltInAI React hook for component integration
- Add .next/ to .gitignore

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat: wire A2A inter-agent messaging into orchestrator + API (#45)

- Add A2AContextMessage dataclass to AgentOrchestrator for lightweight
  inter-agent context sharing during parallel task execution
- Auto-broadcast agent results to peer agents after parallel execution
- Add send_a2a_message() and get_a2a_log() methods to orchestrator
- Add POST /api/v1/agents/a2a/send endpoint for frontend-to-agent messaging
- Add GET /api/v1/agents/a2a/log endpoint to query message history
- Extend frontend agentService with sendA2AMessage() and getA2ALog()

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat: add LiteRT-LM setup script and update README (#46)

- Add setup.sh to download lit CLI binary and .litertlm model
- Support macOS arm64 and x86_64 architectures
- Auto-generate .env with LIT_BINARY_PATH and LIT_MODEL_PATH
- Add .gitignore for bin/, models/, .env
- Update README with Quick Setup section

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat: implement Gemini agentic video analysis with Google Search grounding (#47)

- Create gemini-video-analyzer.ts: single Gemini call with googleSearch
  tool for transcript extraction AND event analysis (PK=998 pattern)
- Add youtube-metadata.ts: scrapes title, description, chapters from
  YouTube without API key
- Update /api/video: Gemini agentic analysis as primary strategy,
  transcribe→extract chain as fallback
- Fix /api/transcribe: remove broken fileData.fileUri, use Gemini
  Google Search grounding as primary, add metadata context, filter
  garbage OpenAI results
- Fix /api/extract-events: accept videoUrl without requiring transcript,
  direct Gemini analysis via Google Search when no transcript available

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: support Vertex_AI_API_KEY as Gemini key fallback

Create shared gemini-client.ts that resolves API key from:
GEMINI_API_KEY → GOOGLE_API_KEY → Vertex_AI_API_KEY

All API routes now use the shared client instead of
hardcoding process.env.GEMINI_API_KEY.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: use Vertex AI Express Mode for Vertex_AI_API_KEY

When only Vertex_AI_API_KEY is set (no GEMINI_API_KEY), the client
now initializes in Vertex AI mode with vertexai: true + apiKey.
Uses project uvai-730bb and us-central1 as defaults.

Also added GOOGLE_CLOUD_PROJECT env var to Vercel.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: Vertex AI Express Mode compatibility — remove responseSchema+googleSearch conflict (#48)

Vertex AI does not support controlled generation (responseSchema) combined
with the googleSearch tool. This caused 400 errors on every Gemini call.

Changes:
- gemini-client.ts: Prioritize Vertex_AI_API_KEY, support GOOGLE_GENAI_USE_VERTEXAI env var
- gemini-video-analyzer.ts: Remove responseSchema, enforce JSON via prompt instructions
- extract-events/route.ts: Same fix for extractWithGemini and inline Gemini calls
- Strip markdown code fences from responses before JSON parsing

Tested end-to-end with Vertex AI Express Mode key against multiple YouTube videos.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: restore full PK=998 pattern — responseSchema + googleSearch + gemini-3-pro-preview (#49)

The previous fix (PR #48) was a shortcut — it removed responseSchema when
the real issue was using gemini-2.5-flash which doesn't support
responseSchema + googleSearch together on Vertex AI.

gemini-3-pro-preview DOES support the combination. This commit restores
the exact PK=998 pattern:

- gemini-video-analyzer.ts: Restored responseSchema with Type system,
  responseMimeType, e22Snippets field, model → gemini-3-pro-preview
- extract-events/route.ts: Restored geminiResponseSchema, Type import,
  responseMimeType, model → gemini-3-pro-preview
- transcribe/route.ts: model → gemini-3-pro-preview

Tested with Vertex AI Express Mode key on two YouTube videos.
Both return structured JSON with events, transcript, actions,
codeMapping, cloudService, e22Snippets, architectureCode, ingestScript.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat: end-to-end pipeline — YouTube URL to deployed software (#50)

- Add /api/pipeline route for full end-to-end pipeline
  (video analysis → code generation → GitHub repo → Vercel deploy)
- Add deployPipeline() action to dashboard store with stage tracking
- Add 🚀 Deploy button to dashboard alongside Analyze
- Show pipeline results (live URL, GitHub repo, framework) in video cards
- Fix deployment_manager import path in video_processing_service
- Wire pipeline to backend /api/v1/video-to-software endpoint
- Fallback to Gemini-only analysis when no backend available

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: add writable directories to Docker image for deployment pipeline

Create /app/generated_projects, /app/youtube_processed_videos, and
/tmp/uvai_data directories in Dockerfile to fix permission denied
errors in the deployment and video processing pipeline on Railway.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: security hardening, video-specific codegen, API consistency

- CORS: replace wildcard/glob with explicit allowed origins in both entry points
- Rate limiting: enable 60 req/min with 15 burst on backend
- API auth: add optional X-API-Key middleware for pipeline endpoints
- Codegen: generate video-specific HTML/CSS/JS from analysis output
- API: accept both 'url' and 'video_url' via Pydantic alias
- Deploy: fix Vercel REST API payload format (gitSource instead of gitRepository)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: Vercel deployment returning empty live_url

Root causes fixed:
- Case mismatch in _poll_deployment_status: compared lowercased status
  against uppercase success_statuses list, so READY was never matched
- Vercel API returns bare domain URLs without https:// prefix; added
  _ensure_https() to normalize them
- Poll requests were missing auth headers, causing 401 failures
- _deploy_files_directly fallback returned fake simulated URLs that
  masked real failures; removed in favor of proper error reporting
- _generate_deployment_urls only returned URLs from 'success' status
  deployments, discarding useful fallback URLs from failed deployments

Improvements:
- On API failure (permissions, plan limits), return a Vercel import URL
  the user can click to deploy manually instead of an empty string
- Support VERCEL_ORG_ID team scoping on deploy and poll endpoints
- Use readyState field (Vercel v13 API) for initial status check
- Add 'canceled' to failure status list in poll loop
- Poll failures are now non-fatal; initial URL is used as fallback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: harden slim entry point — CORS, rate limiting, auth, security headers

- Add uvaiio.vercel.app to CORS allowed origins
- Add slowapi rate limiting (60 req/min)
- Add API key auth middleware (optional via EVENTRELAY_API_KEY)
- Add security headers (X-Content-Type-Options, X-Frame-Options, X-XSS-Protection)
- Fixes production gap where slim main.py had none of the backend/main.py protections

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: resolve Pydantic Config/model_config conflict breaking Railway deploy

The VideoToSoftwareRequest model had both 'model_config = ConfigDict(...)' and
'class Config:' which Pydantic v2 rejects. Merged into single model_config.
This was causing the v1 router to fail loading, making /api/v1/health return 404.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>
Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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