# Complexity Review Report

**Branch**: feat/134-system-prompt-support -> main
**Date**: 2026-04-18T23:49

## Issues in Your Changes (BLOCKING)

_No blocking complexity issues found._

## Issues in Code You Touched (Should Fix)

### HIGH

**`createOrchestration()` is 257 lines -- exceeds 200-line CRITICAL threshold** - `src/services/orchestration-manager.ts:60-316`
**Confidence**: 85%
- Problem: The `createOrchestration` method spans 257 lines. This PR adds 25 more lines (the `hasCustomSystemPrompt`, `finalSystemPrompt`, `finalUserPrompt`, and `operationalContract` destructuring) to an already large method. The method handles input validation, state file setup, orchestration persistence, compensation logic, prompt construction, loop creation, conditional status updates, event emission, and logging -- at least 8 distinct responsibilities in a single method.
- Impact: The sheer length makes it hard to review changes in isolation. A developer modifying prompt logic must mentally load the entire compensation flow, state file setup, and conditional update logic. This increases the risk of introducing bugs in adjacent sections.
- Fix: Extract coherent sections into private methods. The prompt/systemPrompt section (lines 205-249) is a natural extraction point:
  ```typescript
  private buildFinalPrompts(
    request: OrchestratorCreateRequest,
    orchestration: Orchestration,
    stateFilePath: string,
    validatedWorkingDirectory: string,
    agent: AgentProvider,
  ): { finalSystemPrompt: string; finalUserPrompt: string } {
    const { systemPrompt: orchestratorSystemPrompt, userPrompt, operationalContract } =
      buildOrchestratorPrompt({ ... });
    const hasCustomSystemPrompt = Boolean(request.systemPrompt?.trim());
    const finalSystemPrompt = hasCustomSystemPrompt ? request.systemPrompt! : orchestratorSystemPrompt;
    const finalUserPrompt = hasCustomSystemPrompt
      ? `${operationalContract}\n\n${userPrompt}`
      : userPrompt;
    return { finalSystemPrompt, finalUserPrompt };
  }
  ```
  Similarly, the input validation block (lines 73-103) and state file setup (lines 109-151) could be extracted. This would bring each method under 50 lines.

## Pre-existing Issues (Not Blocking)

### MEDIUM

**`buildOrchestratorPrompt` function is 120 lines with a 78-line template literal** - `src/services/orchestrator-prompt.ts:43-162`
**Confidence**: 82%
- Problem: The function body is 120 lines, mostly a single template literal (the system prompt) spanning lines 56-134. While the logic is straightforward (string interpolation), the sheer visual density makes it difficult to spot interpolation errors or missing sections when modifying the prompt.
- Impact: The new `operationalContract` (lines 141-159) partially duplicates content from the `systemPrompt` literal above it (state file, working dir, beat CLI commands, constraints). If either section is updated, the other must be kept in sync manually -- a maintenance hazard.
- Fix: Extract shared prompt sections into named constants or helper functions to reduce duplication:
  ```typescript
  const stateFileSection = (path: string) => `STATE FILE: ${path}\nRead this file at the START...`;
  const constraintsSection = (maxWorkers: number, maxDepth: number) =>
    `CONSTRAINTS:\n- Max concurrent workers: ${maxWorkers}\n- Max delegation depth: ${maxDepth}`;
  ```
  Then compose both `systemPrompt` and `operationalContract` from these shared building blocks.

## Suggestions (Lower Confidence)

- **`cleanupWorkerState` nesting depth reaches 4 levels** - `src/implementations/event-driven-worker-pool.ts:284-319` (Confidence: 65%) -- The new try/catch around `cleanup()` adds a 4th nesting level inside `if (worker?.task.systemPrompt) > if (agentResult.ok) > try`. This is within the "Warning" range per metrics but not actionable since the logic is already correctly guarded.

- **Test setup duplication in adapter cleanup tests** - `tests/unit/implementations/event-driven-worker-pool.test.ts:818-913` (Confidence: 70%) -- Three tests in the "adapter cleanup delegation" describe block each create a full adapter + registry + pool inline. A shared `createPoolWithCleanupAdapter(cleanupFn)` helper would reduce 30 lines of repeated setup.

## Summary
| Category | CRITICAL | HIGH | MEDIUM | LOW |
|----------|----------|------|--------|-----|
| Blocking | 0 | 0 | 0 | - |
| Should Fix | - | 1 | 0 | - |
| Pre-existing | - | - | 1 | 0 |

**Complexity Score**: 7/10
**Recommendation**: APPROVED_WITH_CONDITIONS

The changes introduced by this PR are individually clean and well-structured. The `hasCustomSystemPrompt` / `operationalContract` logic is easy to follow. The one concern is that they increase the size of an already-long method (`createOrchestration`, 257 lines). The HIGH should-fix item recommends extracting the prompt construction section into a private method to keep the orchestration create flow manageable as features continue to accumulate. This is not a merge blocker but should be addressed soon to prevent the method from becoming truly unwieldy.
