store: Pattern: Parallel /simplify agents with isolated worktrees for large refactors

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+---
+id: d75e2afd-8348-4fe6-9ea1-731604505aa6
+type: workflow
+title: "Pattern: Parallel /simplify agents with isolated worktrees for large refactors"
+tags: [sba-scouting, rust, claude-code, workflow, refactoring, parallel, worktree]
+importance: 0.6
+confidence: 0.8
+created: "2026-03-02T02:08:58.862746+00:00"
+updated: "2026-03-02T02:08:58.862746+00:00"
+---
+
+# Parallel /simplify with Isolated Worktree Agents
+
+## Overview
+Successfully ran 17 parallel agents with `isolation: "worktree"` to simultaneously review and simplify every substantive file in the Rust codebase.
+
+## How It Works
+- Each agent gets its own git worktree copy of the repo
+- Agents applied changes directly to the main working tree (not isolated to their worktrees)
+- Run all agents in parallel — no coordination needed for read-heavy simplification tasks
+
+## Results on sba-scouting Rust rewrite
+- 17 agents, 24 files modified
+- Net: -261 lines removed
+- All 105 tests passed after integration
+
+## Common Simplifications Found
+- Duplicated helpers consolidated: `format_rating`, `format_swar`, `tier_style`, `format_relative_time`
+- Heap allocations replaced with stack arrays/HashSets
+- `OnceLock` for invariant hashes (computed once, reused)
+- Transaction wrapping for atomic DB operations
+- `tokio::try_join!` for parallel async DB queries
+
+## When to Use
+- Large refactor/cleanup passes across many files
+- When changes are independent per-file (no cross-file coordination needed)
+- After a feature phase is complete and code needs polish
+
+## Usage
+Use `/simplify` slash command (or equivalent Agent tool call) with `isolation: "worktree"` per file.