Phase-agent wrapper that drives TDD implementation from an approved plan (CTL-449 Initiative 1 Phase 3). Reads thoughts/shared/plans/*-<ticket>.md, delegates the red→green→refactor cycle to /catalyst-dev:implement-plan, commits each plan phase as it lands, and transitions the Linear ticket to inProgress. Dispatched as a claude --bg job by phase-agent-dispatch, which invokes it via slash command — hence user-invocable: true.
$npx -y skills add coalesce-labs/catalyst --skill phase-implementInstalls into the current project.
Run `npx skills use "https://github.com/coalesce-labs/catalyst" --skill "coalesce-labs/catalyst/phase-implement"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/coalesce-labs/catalyst" that are relevant to the current task. Run `npx skills add "https://github.com/coalesce-labs/catalyst"` and select the relevant skills, then follow their instructions.