speckit-implement

Invoke the speckit-implement skill in a project containing a .specify directory with tasks.md and plan.md. It parses the task phases, respects sequential and parallel [P] dependencies, executes each task, and marks completed tasks as [X] in tasks.md.

The project needs a .specify directory with a feature folder containing tasks.md and plan.md, plus the check-prerequisites.sh script. If tasks are missing or incomplete, run the tasks generation command first to create the task breakdown.

It scans all checklist files in the feature's checklists directory and displays a status table. If any checklist has incomplete items, it stops and asks whether to proceed, only continuing after explicit user confirmation.

Hooks are defined in .specify/extensions.yml under hooks.before_implement and hooks.after_implement. Mandatory hooks execute automatically before or after implementation, while optional hooks are displayed as suggestions with their commands and prompts.

Execution halts if a non-parallel task fails, with an error message providing debugging context. For parallel tasks marked [P], successful tasks continue while failed ones are reported, and the skill suggests next steps if implementation cannot proceed.