chore: initial project setup with agent guide

.agent/skills/gsd-settings/SKILL.md

@@ -0,0 +1,32 @@
+---
+name: gsd-settings
+description: Configure GSD workflow toggles and model profile
+---
+
+
+<objective>
+Interactive configuration of GSD workflow agents and model profile via multi-question prompt.
+
+Routes to the settings workflow which handles:
+- Config existence ensuring
+- Current settings reading and parsing
+- Interactive 5-question prompt (model, research, plan_check, verifier, branching)
+- Config merging and writing
+- Confirmation display with quick command references
+</objective>
+
+<execution_context>
+@.agent/get-shit-done/workflows/settings.md
+</execution_context>
+
+<process>
+**Follow the settings workflow** from `@.agent/get-shit-done/workflows/settings.md`.
+
+The workflow handles all logic including:
+1. Config file creation with defaults if missing
+2. Current config reading
+3. Interactive settings presentation with pre-selection
+4. Answer parsing and config merging
+5. File writing
+6. Confirmation display
+</process>