chore: initial project setup with agent guide

.agent/get-shit-done/workflows/list-workspaces.md

@@ -0,0 +1,56 @@
+<purpose>
+List all GSD workspaces found in ~/gsd-workspaces/ with their status.
+</purpose>
+
+<required_reading>
+Read all files referenced by the invoking prompt's execution_context before starting.
+</required_reading>
+
+<process>
+
+## 1. Setup
+
+```bash
+INIT=$(node ".agent/get-shit-done/bin/gsd-tools.cjs" init list-workspaces)
+if [[ "$INIT" == @file:* ]]; then INIT=$(cat "${INIT#@file:}"); fi
+```
+
+Parse JSON for: `workspace_base`, `workspaces`, `workspace_count`.
+
+## 2. Display
+
+**If `workspace_count` is 0:**
+
+```
+No workspaces found in ~/gsd-workspaces/
+
+Create one with:
+  /gsd-new-workspace --name my-workspace --repos repo1,repo2
+```
+
+Done.
+
+**If workspaces exist:**
+
+Display a table:
+
+```
+GSD Workspaces (~/gsd-workspaces/)
+
+| Name | Repos | Strategy | GSD Project |
+|------|-------|----------|-------------|
+| feature-a | 3 | worktree | Yes |
+| feature-b | 2 | clone | No |
+
+Manage:
+  cd ~/gsd-workspaces/<name>     # Enter a workspace
+  /gsd-remove-workspace <name>   # Remove a workspace
+```
+
+For each workspace, show:
+- **Name** — directory name
+- **Repos** — count from init data
+- **Strategy** — from WORKSPACE.md
+- **GSD Project** — whether `.planning/PROJECT.md` exists (Yes/No)
+
+</process>