* feat: add workflow templates — named workflow shapes for different types of work
Introduces `/gsd start <template>` and `/gsd templates` commands with 8 built-in
workflow templates: bugfix, small-feature, spike, hotfix, refactor, security-audit,
dep-upgrade, and full-project. Each template defines purpose-specific phases so
work gets the right level of ceremony instead of forcing everything through the
full milestone pipeline or /gsd quick.
Includes auto-detection from natural language, --dry-run preview, state tracking
for resume support, git branch management, and artifact directory organization.
* fix: guard workflow templates against concurrent auto-mode sessions
Block /gsd start when auto-mode is active to prevent git branch conflicts
and competing message dispatch. When auto-mode is paused, allow templates
to run with an informational notice.
* feat: add workflow resume and in-progress detection
- /gsd start resume — resumes the most recent in-progress workflow
- /gsd start (no args) — shows in-progress workflow if one exists
- STATE.json tracks artifactDir and completedAt for lifecycle management
- Scans .gsd/workflows/*/STATE.json to find unfinished workflows
* chore: remove copyright headers per project conventions
b0c3ab5781