feat(plugin): block /reset, /refine, /setup, /resume in cowork mode

These skills modify state, write config files, or manage worktrees —
all operations that require a full Claude Code CLI session. Cowork
sessions should only use /elaborate for collaborative planning.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jwaldrip

plugin/skills/refine/SKILL.md

@@ -10,6 +10,20 @@ You are refining an AI-DLC intent or unit specification mid-construction. Your j
 
 ---
 
+## Pre-check: Reject Cowork Mode
+
+```bash
+if [ "${CLAUDE_CODE_IS_COWORK:-}" = "1" ]; then
+  echo "ERROR: /refine cannot run in cowork mode."
+  echo "Run this in a full Claude Code CLI session."
+  exit 1
+fi
+```
+
+If `CLAUDE_CODE_IS_COWORK=1`, stop immediately with the message above. Do NOT proceed.
+
+---
+
 ## Step 1: Load Intent State
 
 ```bash

plugin/skills/reset/SKILL.md

@@ -31,6 +31,18 @@ The work you did is preserved in git. Only the AI-DLC workflow state is cleared.
 
 ## Implementation
 
+### Pre-check: Reject Cowork Mode
+
+```bash
+if [ "${CLAUDE_CODE_IS_COWORK:-}" = "1" ]; then
+  echo "ERROR: /reset cannot run in cowork mode."
+  echo "Run this in a full Claude Code CLI session."
+  exit 1
+fi
+```
+
+If `CLAUDE_CODE_IS_COWORK=1`, stop immediately with the message above. Do NOT proceed.
+
 ### Step 1: Confirm (Optional)
 
 If the task is not complete, warn:

plugin/skills/resume/SKILL.md

@@ -34,6 +34,18 @@ User: /construct
 
 ## Implementation
 
+### Pre-check: Reject Cowork Mode
+
+```bash
+if [ "${CLAUDE_CODE_IS_COWORK:-}" = "1" ]; then
+  echo "ERROR: /resume cannot run in cowork mode."
+  echo "Run this in a full Claude Code CLI session."
+  exit 1
+fi
+```
+
+If `CLAUDE_CODE_IS_COWORK=1`, stop immediately with the message above. Do NOT proceed.
+
 ### Step 1: Find Resumable Intents
 
 If no slug provided, scan multiple sources for active intents:

plugin/skills/setup/SKILL.md

@@ -35,6 +35,20 @@ This skill is **idempotent** — re-running `/setup` preserves existing settings
 
 ---
 
+## Pre-check: Reject Cowork Mode
+
+```bash
+if [ "${CLAUDE_CODE_IS_COWORK:-}" = "1" ]; then
+  echo "ERROR: /setup cannot run in cowork mode."
+  echo "Run this in a full Claude Code CLI session inside your project directory."
+  exit 1
+fi
+```
+
+If `CLAUDE_CODE_IS_COWORK=1`, stop immediately with the message above. Do NOT proceed.
+
+---
+
 ## Phase 0: Load Existing Settings
 
 1. Check if `.ai-dlc/settings.yml` exists using the `Read` tool.