story-kit: create 310_story_bot_delete_command_removes_a_story_from_the_pipeline

.story_kit/work/1_backlog/310_story_bot_delete_command_removes_a_story_from_the_pipeline.md

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+---
+name: "Bot delete command removes a story from the pipeline"
+---
+
+# Story 310: Bot delete command removes a story from the pipeline
+
+## User Story
+
+As a project owner in a Matrix room, I want to type "{bot_name} delete {story_number}" to remove a story/bug/spike from the pipeline, so that I can clean up obsolete or duplicate work items from chat.
+
+## Acceptance Criteria
+
+- [ ] '{bot_name} delete {number}' finds the story/bug/spike by number across all pipeline stages and deletes the file
+- [ ] Confirms deletion with the story name and stage it was in
+- [ ] Returns a friendly message if no story with that number exists
+- [ ] Stops any running agent on the story before deleting
+- [ ] Removes the worktree if one exists for the story
+- [ ] Registered in the command registry so it appears in help output
+- [ ] Handled at bot level without LLM invocation
+- [ ] Commits the deletion to git
+
+## Out of Scope
+
+- TBD