chore: initial backup of Claude Code configuration

Includes: CLAUDE.md, settings.json, agents, commands, rules, skills,
hooks, contexts, evals, get-shit-done, plugin configs (installed list
and marketplace sources). Excludes credentials, runtime caches,
telemetry, session data, and plugin binary cache.

commands/gsd/new-milestone.md

@@ -0,0 +1,44 @@
+---
+name: gsd:new-milestone
+description: Start a new milestone cycle — update PROJECT.md and route to requirements
+argument-hint: "[milestone name, e.g., 'v1.1 Notifications']"
+allowed-tools:
+  - Read
+  - Write
+  - Bash
+  - Task
+  - AskUserQuestion
+---
+<objective>
+Start a new milestone: questioning → research (optional) → requirements → roadmap.
+
+Brownfield equivalent of new-project. Project exists, PROJECT.md has history. Gathers "what's next", updates PROJECT.md, then runs requirements → roadmap cycle.
+
+**Creates/Updates:**
+- `.planning/PROJECT.md` — updated with new milestone goals
+- `.planning/research/` — domain research (optional, NEW features only)
+- `.planning/REQUIREMENTS.md` — scoped requirements for this milestone
+- `.planning/ROADMAP.md` — phase structure (continues numbering)
+- `.planning/STATE.md` — reset for new milestone
+
+**After:** `/gsd:plan-phase [N]` to start execution.
+</objective>
+
+<execution_context>
+@C:/Users/yaoji/.claude/get-shit-done/workflows/new-milestone.md
+@C:/Users/yaoji/.claude/get-shit-done/references/questioning.md
+@C:/Users/yaoji/.claude/get-shit-done/references/ui-brand.md
+@C:/Users/yaoji/.claude/get-shit-done/templates/project.md
+@C:/Users/yaoji/.claude/get-shit-done/templates/requirements.md
+</execution_context>
+
+<context>
+Milestone name: $ARGUMENTS (optional - will prompt if not provided)
+
+Project and milestone context files are resolved inside the workflow (`init new-milestone`) and delegated via `<files_to_read>` blocks where subagents are used.
+</context>
+
+<process>
+Execute the new-milestone workflow from @C:/Users/yaoji/.claude/get-shit-done/workflows/new-milestone.md end-to-end.
+Preserve all workflow gates (validation, questioning, research, requirements, roadmap approval, commits).
+</process>