huskies: create 476_refactor_split_agents_pool_lifecycle_rs_into_submodules

.huskies/work/1_backlog/475_refactor_deduplicate_lifecycle_rs_move_functions_into_a_shared_parameterised_helper.md

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-name: "Deduplicate lifecycle.rs move functions into a shared parameterised helper"
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-
-# Refactor 475: Deduplicate lifecycle.rs move functions into a shared parameterised helper
-
-## Current State
-
-- TBD
-
-## Desired State
-
-The move_story_to_current, move_story_to_done, move_story_to_merge, move_story_to_qa, and reject_story_from_qa functions share the same pattern: build paths, check idempotency, find source file in one or more stages, rename, clear front matter fields, log. Extract a shared `move_story()` helper parameterised by source stages, target stage, and fields to clear. The named functions become thin wrappers. The existing `move_story_to_stage` function should also use this shared helper. 27 existing tests provide a safety net.
-
-## Acceptance Criteria
-
-- [ ] Single shared move_story helper function parameterised by source stages, target stage, and fields to clear
-- [ ] All existing named move functions (move_story_to_current, move_story_to_done, move_story_to_merge, move_story_to_qa, reject_story_from_qa) become thin wrappers
-- [ ] move_story_to_stage also delegates to the shared helper
-- [ ] All 27 existing tests pass unchanged
-- [ ] Net reduction of at least 150 lines from lifecycle.rs
-
-## Out of Scope
-
-- TBD

.huskies/work/1_backlog/476_refactor_split_agents_pool_lifecycle_rs_into_submodules.md

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+---
+name: "Split agents/pool/lifecycle.rs into submodules"
+---
+
+# 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