execute-story

name	execute-story
description	Start autonomous story implementation
argument-hint	<story-id>
user-invocable	true
disable-model-invocation	true
allowed-tools	Bash, Read, Task, AskUserQuestion, TaskCreate, TaskUpdate, TaskList, TaskGet

Execute Story Skill

!node $SAGA_PLUGIN_ROOT/scripts/find.js "$0" --type story

Tasks

Subject	Description	Active Form	Blocked By	Blocks
Resolve story	The saga find command ran above and output a JSON result. Handle the result based on its structure: (1) If found=true: Extract data.storyId as storyId and data.worktreePath and proceed. (2) If found=false with matches array: Use AskUserQuestion to disambiguate with question "Which story do you want to implement?", header "Story", multiSelect false, and options array where each item has label "" and description " (Status: <status>)" for each story in the matches array. After selection, use the selected story's storyId and worktreePath. (3) If found=false with error: Display the error message and suggest using /task-list to see available stories, then stop.	Resolving story	-	Update worktree branch
Update worktree branch	Before starting implementation, ensure the worktree branch has the latest changes from master. Run using Bash: cd "<worktreePath>" && git fetch origin master && git merge origin/master -m "Merge origin/master into story branch" && cd "$SAGA_PROJECT_DIR" where <worktreePath> is data.worktreePath from the resolved story. This ensures workers start with the latest codebase, avoiding merge conflicts later. The final cd returns to the project root before running the worker.	Updating worktree	Resolve story	Run worker
Run worker	Create a tmux session and run the worker inside it. Generate a session name: saga-story-<storyId>-<timestamp> where <timestamp> is the current Unix epoch seconds (use date +%s). Create an output directory at $SAGA_SESSION_DIR if it doesn't exist. Create the tmux session and run the worker: mkdir -p ${SAGA_SESSION_DIR:?} && tmux new-session -d -s "<sessionName>" "node ${SAGA_PLUGIN_ROOT:?}/scripts/worker.js <storyId> --messages-file ${SAGA_SESSION_DIR:?}/<sessionName>.jsonl" Save sessionName and the output file path for the status report.	Running worker	Update worktree branch	Report status
Report status	Output the execution status to the user using the format shown in the Status Output Format section below. Use the storyId, sessionName, and output file path from previous tasks.	Reporting status	Run worker	-

Status Output Format

===============================================================
Starting Autonomous Story Implementation
===============================================================

Story: <storyId>
Worktree: .saga/worktrees/<storyId>/
Session: <sessionName>
Output: $SAGA_SESSION_DIR/<sessionName>.jsonl

The implementation is now running in a detached tmux session.
The worker orchestrates headless Claude runs using native Tasks tools.

Monitor progress:
  - tail -f $SAGA_SESSION_DIR/<sessionName>.jsonl
  - tmux attach -t <sessionName>

The worker will exit with one of these statuses:
  Exit 0   - All tasks completed successfully, PR marked ready
  Exit 1   - Error occurred
  Exit 2   - Max cycles or timeout reached

===============================================================

Notes

• The worker script handles the full pipeline: worktree setup, draft PR creation, task hydration, headless run loop, and PR readiness marking
• The worker manages its own execution loop (max cycles, timeout, model selection) via defaults
• Headless runs use native Claude Code Tasks tools (TaskList, TaskGet, TaskUpdate) for task tracking
• Workers operate within the worktree context with scope enforcement via SAGA_STORY_ID