feat: migrate commands to skills

.claude/skills/mode-switching/SKILL.md

@@ -0,0 +1,91 @@
+---
+name: mode-switching
+argument-hint: "[mode name]"
+description: >
+  Use when the user wants to switch behavioral modes for the session — adjusting communication style, output format, and problem-solving approach. Trigger for keywords like "mode", "switch mode", "brainstorm mode", "token-efficient", "deep-research mode", "implementation mode", "review mode", "orchestration mode", or any request to change how Claude responds for the remainder of the session.
+---
+
+# Mode Switching
+
+## When to Use
+
+- User wants to change response style for the session
+- Switching between exploration and execution phases
+- Optimizing for token efficiency during high-volume work
+- Entering focused review or deep-research mode
+
+## When NOT to Use
+
+- One-off format requests ("give me a shorter answer") — just comply directly
+- Switching tools or skills — modes affect style, not capabilities
+
+---
+
+## Available Modes
+
+| Mode | Description | Best For |
+|------|-------------|----------|
+| `default` | Balanced responses, mix of explanation and code | General tasks |
+| `brainstorm` | More questions, multiple alternatives, explore trade-offs | Design, ideation |
+| `token-efficient` | Minimal explanations, code-only where possible | High-volume, cost savings |
+| `deep-research` | Thorough analysis, citations, confidence levels | Investigation, audits |
+| `implementation` | Jump straight to code, progress indicators | Executing plans |
+| `review` | Look for issues first, severity levels, actionable feedback | Code review, QA |
+| `orchestration` | Task breakdown, parallel execution, result aggregation | Complex parallel work |
+
+## Mode Activation
+
+```
+/mode brainstorm              # Switch for session
+/mode                         # Show current mode
+/mode default                 # Reset
+```
+
+## Per-Command Override
+
+Modes can be overridden for a single command without changing the session mode:
+
+```
+/feature --mode=implementation "add user profiles"
+/review --mode=deep-research src/auth/
+/plan --mode=brainstorm "design payment flow"
+```
+
+## Recommended Workflows
+
+### Feature Development
+
+```
+brainstorm → implementation → review → default
+```
+
+### Bug Investigation
+
+```
+deep-research → implementation → default
+```
+
+### Cost-Conscious Session
+
+```
+token-efficient → [work on tasks] → default
+```
+
+---
+
+## Mode Files
+
+Mode definitions: `.claude/modes/`
+
+Customize modes by editing these files. Each mode adjusts:
+- Communication style and verbosity
+- Output format preferences
+- Problem-solving approach
+- When to ask questions vs proceed
+
+---
+
+## Related Skills
+
+- `writing-concisely` — The token-efficient mode activates this skill's patterns
+- `brainstorming` — The brainstorm mode uses this skill's questioning approach