singularity-forge/docs/git-strategy.md
Jeremy McSpadden 2042a30232 feat: workflow mode system (solo/team) with /gsd mode command (#651)
* feat: add workflow mode system (solo/team) with /gsd mode command

Introduces a `mode` preference that bundles sensible defaults for solo
developers vs team workflows, replacing the need to manually configure
5-8 individual git preferences.

* fix: resolve TS2339 — use string narrowing for ctx.ui.select return type
2026-03-16 11:04:51 -06:00

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# Git Strategy
GSD uses git worktrees for milestone isolation and sequential commits within each milestone. The strategy is fully automated — you don't need to manage branches manually.
## Branching Model
```
main ─────────────────────────────────────────────────────────
│ ↑
└── milestone/M001 (worktree) ────────────────────────┘
commit: feat(S01/T01): core types
commit: feat(S01/T02): markdown parser
commit: feat(S01/T03): file writer
commit: docs(M001/S01): workflow docs
...
→ squash-merged to main as single commit
```
### Key Properties
- **One worktree per milestone** — all work happens in `.gsd/worktrees/<MID>/`
- **Sequential commits on one branch** — no per-slice branches, no merge conflicts within a milestone
- **Squash merge to main** — when the milestone completes, all commits are squashed into one clean commit on main
- **Worktree teardown** — after merge, the worktree and branch are cleaned up
### Commit Format
Commits use conventional commit format with scope:
```
feat(S01/T01): core type definitions
feat(S01/T02): markdown parser for plan files
fix(M001/S03): bug fixes and doc corrections
docs(M001/S04): workflow documentation
```
## Worktree Management
### Automatic (Auto Mode)
Auto mode creates and manages worktrees automatically:
1. When a milestone starts, a worktree is created at `.gsd/worktrees/<MID>/` on branch `milestone/<MID>`
2. Planning artifacts from `.gsd/milestones/` are copied into the worktree
3. All execution happens inside the worktree
4. On milestone completion, the worktree is squash-merged to the integration branch
5. The worktree and branch are removed
### Manual
Use the `/worktree` (or `/wt`) command for manual worktree management:
```
/worktree create
/worktree switch
/worktree merge
/worktree remove
```
## Workflow Modes
Instead of configuring each git setting individually, set `mode` to get sensible defaults for your workflow:
```yaml
mode: solo # personal projects — auto-push, squash, simple IDs
mode: team # shared repos — unique IDs, push branches, pre-merge checks
```
| Setting | `solo` | `team` |
|---|---|---|
| `git.auto_push` | `true` | `false` |
| `git.push_branches` | `false` | `true` |
| `git.pre_merge_check` | `false` | `true` |
| `git.merge_strategy` | `"squash"` | `"squash"` |
| `git.isolation` | `"worktree"` | `"worktree"` |
| `git.commit_docs` | `true` | `true` |
| `unique_milestone_ids` | `false` | `true` |
Mode defaults are the lowest priority — any explicit preference overrides them. For example, `mode: solo` with `git.auto_push: false` gives you everything from solo except auto-push.
Existing configs without `mode` work exactly as before — no defaults are injected.
## Git Preferences
Configure git behavior in preferences:
```yaml
git:
auto_push: false # push after commits
push_branches: false # push milestone branch
remote: origin
snapshots: false # WIP snapshot commits
pre_merge_check: false # pre-merge validation
commit_type: feat # override commit type prefix
main_branch: main # primary branch name
commit_docs: true # commit .gsd/ to git
```
### `commit_docs: false`
When set to `false`, GSD adds `.gsd/` to `.gitignore` and keeps all planning artifacts local-only. Useful for teams where only some members use GSD, or when company policy requires a clean repository.
## Self-Healing
GSD includes automatic recovery for common git issues:
- **Detached HEAD** — automatically reattaches to the correct branch
- **Stale lock files** — removes `index.lock` files from crashed processes
- **Orphaned worktrees** — detects and offers to clean up abandoned worktrees
Run `/gsd doctor` to check git health manually.
## Native Git Operations
Since v2.16, GSD uses libgit2 via native bindings for read-heavy operations in the dispatch hot path. This eliminates ~70 process spawns per dispatch cycle, improving auto-mode throughput.