Subagent Orchestrator

When to Use This Skill

• User wants to extract BlazeMeter results and Datadog metrics via subagents
• User mentions "subagent workflow", "subagent orchestrator", or "run the extractors"
• User wants to offload BlazeMeter and Datadog MCP work to subagents to save context

What This Skill Does

1. Collects inputs from the user
2. Invokes the blazemeter-extractor subagent to populate artifacts/{test_run_id}/blazemeter/
3. Extracts timestamps via subagent return (primary) or test_config.json (fallback)
4. Invokes the datadog-extractor subagent to populate artifacts/{test_run_id}/datadog/
5. Writes an orchestrator_manifest.json with execution results
6. STOPS — does NOT proceed to PerfAnalysis, PerfReport, or Confluence

After this skill completes, the user can continue with the performance-testing-workflow skill starting from Step 4 (PerfAnalysis).

Architecture

User Prompt (test_run_id, env_name, ...)
  │
  ▼
Orchestrator (this skill)
  │
  ├── blazemeter-extractor subagent
  │     └── artifacts/{test_run_id}/blazemeter/
  │           ├── test-results.csv
  │           ├── aggregate_performance_report.csv
  │           ├── test_config.json
  │           ├── jmeter.log (or jmeter-*.log)
  │           ├── public_report.json
  │           ├── sessions/session_manifest.json
  │           └── subagent_manifest.json
  │
  ├── [extract start_time / end_time]
  │
  ├── datadog-extractor subagent
  │     └── artifacts/{test_run_id}/datadog/
  │           ├── host_metrics_*.csv or k8s_metrics_*.csv
  │           ├── logs_*.csv
  │           ├── apm_traces_*.csv (if traces exist)
  │           ├── kpi_metrics_*.csv (if requested)
  │           └── subagent_manifest.json
  │
  └── orchestrator_manifest.json
        └── artifacts/{test_run_id}/orchestrator_manifest.json

Platform Notes

mcpServers YAML field: Confirmed that Cursor does NOT enforce the mcpServers field in subagent frontmatter. Both subagents see all configured MCP servers. Tool isolation is enforced via prompt-level instructions in each subagent's system prompt. The mcpServers field is retained in the YAML for forward compatibility and for Claude Code users where it IS enforced.

Execution

Follow these steps exactly, in order.

Step 1 — Collect Inputs

Ask the user for the following values. Do not proceed until all required values are collected.

REQUIRED:
  test_run_id = [BlazeMeter test run ID — e.g., "12345678"]
  env_name    = [Datadog environment name — e.g., "QA", "UAT"]

OPTIONAL:
  test_name       = [informational label for the test run]
  log_query_type  = [Datadog log query type — default: "all_errors"]
  apm_query_type  = [Datadog APM query type — default: "all_errors"]
  kpi_query_names = [list of KPI query group keys — default: none]

Step 2 — Initialize Task Tracking

Create task items to monitor progress:

• BlazeMeter subagent invocation
• Timestamp handoff (primary + fallback)
• Datadog subagent invocation
• Orchestrator manifest generation

Step 3 — Invoke BlazeMeter Subagent

Action: Invoke the blazemeter-extractor subagent with the following prompt:

Extract BlazeMeter test results for test_run_id: {test_run_id}.
{Include test_name if provided: "Test name: {test_name}"}

Follow all instructions in your system prompt including writing the
subagent_manifest.json file.

After the subagent returns:

1. Parse the JSON block from the subagent's response
2. Record the full JSON response for the orchestrator manifest
3. Extract status, start_time, end_time, and notes
4. Record whether JSON parsing succeeded or failed

Save:

• bz_status = parsed status value
• bz_start_time = parsed start_time value (may be null)
• bz_end_time = parsed end_time value (may be null)
• bz_return_json = the full parsed JSON object

If bz_status is "failed", warn the user but continue to Step 4 to attempt the fallback timestamp mechanism.

Step 4 — Timestamp Handoff (Primary + Fallback)

This step uses two approaches for getting timestamps. Record results for both.

4a. Primary Approach — From Subagent Return JSON

Check if bz_start_time and bz_end_time from Step 3 are non-null and valid ISO 8601.

Record:

• primary_handoff_success = true/false
• primary_start_time = value or null
• primary_end_time = value or null

4b. Fallback Approach — From test_config.json File

Attempt to read artifacts/{test_run_id}/blazemeter/test_config.json.

If the file exists, extract start_time and end_time from it.

Note: The test_config.json format may differ from ISO 8601 (e.g., "2026-02-26 07:42:33 UTC" instead of "2026-02-26T07:42:33Z"). Normalize to ISO 8601 before passing to Datadog if using the fallback.

Record:

• fallback_file_exists = true/false
• fallback_start_time = value or null
• fallback_end_time = value or null

4c. Determine Effective Timestamps

Use the primary approach values if available. Fall back to the file-based values if the primary approach returned null. If both are null, record the failure.

Record:

• effective_start_time = the value that will be passed to Datadog
• effective_end_time = the value that will be passed to Datadog
• timestamp_source = "subagent_return" or "test_config_file" or "none"

If timestamp_source is "none", warn the user that Datadog extraction cannot proceed without timestamps. Stop and report the failure.

Step 5 — Invoke Datadog Subagent

Action: Invoke the datadog-extractor subagent with the following prompt:

Extract Datadog metrics for the following test run:

  test_run_id: {test_run_id}
  env_name:    {env_name}
  start_time:  {effective_start_time}
  end_time:    {effective_end_time}
  {Include if provided: "log_query_type: {log_query_type}"}
  {Include if provided: "apm_query_type: {apm_query_type}"}
  {Include if provided: "kpi_query_names: {kpi_query_names}"}

Follow all instructions in your system prompt including writing the
subagent_manifest.json file.

After the subagent returns:

1. Parse the JSON block from the subagent's response
2. Record the full JSON response for the orchestrator manifest
3. Extract status, env_type, and notes
4. Record whether JSON parsing succeeded or failed

Save:

• dd_status = parsed status value
• dd_return_json = the full parsed JSON object

Step 6 — Write Orchestrator Manifest

Write artifacts/{test_run_id}/orchestrator_manifest.json with the following structure:

{
  "orchestrator": "subagent-orchestrator",
  "orchestrator_version": "1.0.0",
  "test_run_id": "<test_run_id>",
  "env_name": "<env_name>",
  "execution_timestamp": "<ISO 8601 UTC>",
  "subagents": {
    "blazemeter": {
      "invocation_success": "<true | false>",
      "return_json_parsed": "<true | false>",
      "return_json": "<full bz_return_json or null>",
      "subagent_manifest_exists": "<true | false — check artifacts/{test_run_id}/blazemeter/subagent_manifest.json>"
    },
    "timestamp_handoff": {
      "primary_approach": {
        "source": "subagent_return",
        "success": "<true | false>",
        "start_time": "<value or null>",
        "end_time": "<value or null>"
      },
      "fallback_approach": {
        "source": "test_config_file",
        "file_exists": "<true | false>",
        "success": "<true | false>",
        "start_time": "<value or null>",
        "end_time": "<value or null>"
      },
      "effective_source": "<subagent_return | test_config_file | none>",
      "effective_start_time": "<value or null>",
      "effective_end_time": "<value or null>"
    },
    "datadog": {
      "invocation_success": "<true | false>",
      "return_json_parsed": "<true | false>",
      "return_json": "<full dd_return_json or null>",
      "subagent_manifest_exists": "<true | false — check artifacts/{test_run_id}/datadog/subagent_manifest.json>"
    }
  },
  "artifact_validation": {
    "blazemeter_folder_exists": "<true | false>",
    "blazemeter_files": {
      "test_results_csv": "<true | false>",
      "aggregate_performance_report_csv": "<true | false>",
      "test_config_json": "<true | false>",
      "jmeter_log": "<true | false>",
      "session_manifest_json": "<true | false>",
      "public_report_json": "<true | false>"
    },
    "datadog_folder_exists": "<true | false>",
    "datadog_files": {
      "infrastructure_metrics_csv": "<true | false>",
      "logs_csv": "<true | false>",
      "apm_traces_csv": "<true | false>",
      "kpi_metrics_csv": "<true | false | not_applicable>"
    }
  },
  "overall_assessment": {
    "blazemeter_extraction": "success | partial | failed | not_attempted",
    "datadog_extraction": "success | partial | failed | not_attempted",
    "ready_for_perfanalysis": "<true | false>"
  }
}

Step 7 — Report Results to User

Present a clear summary to the user:

1. BlazeMeter Subagent Results
   • Status (success/partial/failed)
   • Files written to artifacts/{test_run_id}/blazemeter/
   • Any errors or warnings
2. Timestamp Handoff Results
   • Which approach worked (primary, fallback, both, neither)
   • Effective timestamps used
3. Datadog Subagent Results
   • Status (success/partial/failed)
   • Files written to artifacts/{test_run_id}/datadog/
   • Any errors or warnings
4. Overall Assessment
   • Are artifacts ready for PerfAnalysis?
5. Manifest Locations
   • artifacts/{test_run_id}/orchestrator_manifest.json
   • artifacts/{test_run_id}/blazemeter/subagent_manifest.json
   • artifacts/{test_run_id}/datadog/subagent_manifest.json
6. Next Steps
   • If artifacts are ready, the user can continue with the performance-testing-workflow skill starting from Step 4 (PerfAnalysis) to complete the pipeline.

Error Handling

• If a subagent fails to invoke entirely, record it in the orchestrator manifest and continue to the next step.
• If JSON parsing of a subagent return fails, record the raw text response in the manifest under a raw_response field.
• Do NOT retry subagent invocations. Each subagent handles its own retries internally.
• Do NOT modify any existing Rules, Skills, or MCP source code.
• If the orchestrator itself encounters an error writing the manifest, report the error directly to the user with the full error message.

Related Files

• Production E2E orchestration skill: .cursor/skills/performance-testing-workflow/SKILL.md
• BlazeMeter subagent: .cursor/agents/blazemeter-extractor.md
• Datadog subagent: .cursor/agents/datadog-extractor.md
• MCP error handling rules: .cursor/rules/mcp-error-handling.mdc
• Skill execution rules: .cursor/rules/skill-execution-rules.mdc
• Prerequisites: .cursor/rules/prerequisites.mdc