feat: Implement MCPOrchestrator._execute_on_server for true E2E execution - #1038
feat: Implement MCPOrchestrator._execute_on_server for true E2E execution#1038google-labs-jules[bot] wants to merge 14 commits into
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- Implement real JSON-RPC over HTTP execution using `aiohttp` to replace the `NotImplementedError` stub, enabling true end-to-end MCP workflow capabilities. - Manage `aiohttp.ClientSession` lifecycle within the orchestrator's start/stop loop, reusing connections to optimize performance. - Provide a robust one-off fallback session handler for un-orchestrated execution contexts. - Handle and re-raise exceptions seamlessly for logging and monitoring. - Add comprehensive `aioresponses`-based mocking and unit tests covering successful HTTP calls, response errors, and payload data logic.
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Dependency Review✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.Snapshot WarningsEnsure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice. Scanned FilesNone |
Agent Completion Truth Gate: BLOCKEDReasons: Machine-readable verdict{
"details": {
"invalid_fields": [
"issue.number",
"policy.agent_login",
"policy.run_id"
]
},
"reasons": [
"invalid_payload"
],
"verdict": "blocked"
} |
![vercel[bot]](https://avatars.githubusercontent.com/in/8329?s=60&v=4){kind=small}
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Automated pre-review scan (holding at the human merge gate — not merging). Blocking-ish nit
Coordination
Session handling looks correct: CI status: real checks (CI, CodeQL, Coverage, Security Scan) were still Generated by Claude Code |
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Review — _execute_on_server implementation
Solid first cut. The ephemeral-vs-pooled session handling is correct (reuse self.session when orchestration is running, otherwise create a short-lived session and close it in finally — no leak), the JSON-RPC 2.0 envelope is well-formed, and the error-path test coverage (HTTP 500 + JSON-RPC error) is good. A few things to address before this merges:
1. Accidental duplicate + stray whitespace in self.metrics (should fix).
The diff adds a second "total_tasks": 0, key (plus blank lines) to the metrics dict:
self.metrics = {
"total_tasks": 0, # <-- duplicate, remove
"total_tasks": 0,
"completed_tasks": 0,Harmless at runtime (Python keeps the last key) but clearly unintended. Please drop the duplicate key and the stray blank lines introduced here, in start_orchestration, and inside the except aiohttp.ClientError block.
2. timeout=task.timeout passes a bare int to session.post (robustness).
task.timeout is an int (seconds). aiohttp's per-request timeout expects a ClientTimeout; a bare number is coerced but the behavior is version-dependent and has been deprecation-prone. Prefer being explicit:
timeout=aiohttp.ClientTimeout(total=task.timeout)Note the aioresponses-based tests mock the transport, so they don't actually exercise timeout handling — this wouldn't surface in CI.
3. Auth-token injection is a headline feature but isn't asserted (test gap).
test_successful_execution registers the server with auth_token="secret" but never checks that Authorization: Bearer secret was actually sent. Since token injection is one of the main points of this PR, please assert on the recorded request headers (aioresponses exposes m.requests) so the auth path is genuinely covered.
4. Optional — exception chaining.
raise RuntimeError(f"MCP server execution failed: {e}") inside except aiohttp.ClientError as e: drops the cause; raise RuntimeError(...) from e preserves the traceback. Minor (CI lint is currently green), but nicer for debugging.
Merge blocker is not the code. The red checks — agent-completion/truth-gate (invalid_payload: missing issue.number / policy.agent_login / policy.run_id), PR Governance, and Canonical issue and evidence — are failing because this PR has no linked canonical issue / evidence payload, not because of anything in the diff. The code-quality checks (lint-python, bandit, dependency-review) are green. That governance linkage needs to be sorted (or the gate satisfied) before this can merge; I'm leaving this as a comment, not request-changes, since items 1–4 are minor and the real gate is process, not correctness.
Generated by Claude Code
The new MCPOrchestrator._execute_on_server tests imported `aioresponses`, which was never declared as a dev dependency — CI failed with `ModuleNotFoundError: No module named 'aioresponses'` (3 failing tests). Declaring the dependency alone does not fix it: aioresponses 0.7.9 is incompatible with aiohttp 3.14 (ClientResponse now requires `stream_writer`), so the tests would still error out once the module was installed. Rewrite the three tests to mock the aiohttp session with unittest.mock — no external dependency and version-proof — and add coverage for both the pooled-session reuse path and the create-and-close fallback path. Also tidy the orchestrator change introduced alongside the tests: - group `import aiohttp` as a third-party import (ruff I001) - annotate `self.session: Optional[aiohttp.ClientSession]` (mypy strict) - drop a duplicated `total_tasks` key from the metrics dict - chain the re-raised RuntimeError with `from e` (ruff B904) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QdsNW4BxCUySyXJ42PRpJC
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The #1040 remediates this — it builds on this branch's commit Generated by Claude Code |
Controller reconciliation receipt — 2026-07-27
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…rkflow_governance.py)
Controller containment receipt — 2026-07-27
This is containment evidence, not #898 progress credit. #1038 remains draft and outside active execution until one existing focused child issue and a valid issue-bound receipt are attached. |
…rator.py after provider overwrite
…py after provider overwrite
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Contained another unsafe provider overwrite at
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2 participants
Status
Draft and outside active #898 execution. No focused child issue or valid issue-bound receipt exists. PR #1040 remains a draft duplicate; its useful test repair is preserved in this canonical branch.
Outcome
Implements
MCPOrchestrator._execute_on_serverwithaiohttpJSON-RPC execution, optional bearer authentication, pooled-session reuse, bounded temporary-session fallback, and dependency-free unit tests usingunittest.mock.Latest containment — 2026-07-27
Provider head
843b0532193da9ebf0089779635877e401e0cbc8again:fail_underfrom88.1833to75.0;aioresponsesto production requirements;NotImplementedError;The controller restored all five affected files through additive commits on this same branch. Final exact head
b3c347aebec92dd69977819c8508742a96e38bb4is 12 commits ahead of trusted265f411989b4887d8e90c78fc8f9e438abae3dbdwith zero changed files.Exact-head evidence
88.1833; the guardrail requires>= 88.1833.Execution receipt
google-labs-jules[bot]/ task7365924146265499223groupthinking/eventrelay-blocker-watch-20260727T1808Zfeature/implement-mcp-orchestrator-execution-7365924146265499223/ feat: Implement MCPOrchestrator._execute_on_server for true E2E execution #10382026-07-27T17:49:06Z2026-07-27T18:15:37Zb3c347aebec92dd69977819c8508742a96e38bb4Next executable action
Bind one existing focused child issue and a valid issue-bound receipt before this can enter active execution. Until then, do not credit progress to #898, mark ready, or merge.
No merge, branch deletion, workflow approval, credential change, ruleset weakening, or production mutation is authorized.