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+---
+name: "Split agents/pool/lifecycle.rs into submodules"
+agent: coder-opus
+---
+
+# Refactor 476: Split agents/pool/lifecycle.rs into submodules
+
+## Current State
+
+- TBD
+
+## Desired State
+
+pool/lifecycle.rs is 1812 lines with 4 public functions (start_agent, stop_agent, wait_for_agent, remove_agents_for_story) plus 29 tests. start_agent is by far the largest — it handles agent selection, worktree creation, process spawning, and completion callbacks. Split into submodules: start.rs (agent start + selection logic), stop.rs (stop + cleanup), wait.rs (wait_for_agent), with tests co-located in each module.
+
+## Acceptance Criteria
+
+- [ ] pool/lifecycle.rs split into submodules (e.g. start.rs, stop.rs, wait.rs)
+- [ ] Each submodule contains its related tests
+- [ ] All 29 existing tests pass unchanged
+- [ ] Public API unchanged — re-export from pool/mod.rs if needed
+- [ ] No functional changes, purely structural
+
+## Out of Scope
+
+- TBD