Initial commit

commands/split.md

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+---
+allowed-tools: Bash(jj log:*), Bash(jj diff:*), Bash(jj status:*), Bash(jj new:*), Bash(jj move:*), Bash(jj describe:*), Bash(~/bin/jj-ai-desc.py:*)
+argument-hint: <pattern>
+description: Split unwanted changes into new child commit with AI description
+model: claude-haiku-4-5
+---
+
+!# Validate pattern argument
+
+if [ -z "$ARGUMENTS" ]; then
+echo "❌ **Error: Pattern required**"
+echo ""
+echo "**Usage:** \`/jj:split <pattern>\`"
+echo ""
+echo "**Common patterns:**"
+echo "- \`test\` - Test and spec files"
+echo "- \`docs\` - Documentation (*.md, README, CHANGELOG)"
+echo "- \`config\` - Config files (*.json, *.yaml, *.toml)"
+echo "- Custom glob patterns (e.g., \`*.md\`, \`src/**/*.test.ts\`)"
+echo ""
+echo "**What it does:**"
+echo "1. Keeps wanted changes in current commit (@)"
+echo "2. Moves unwanted (matching pattern) changes to new child commit"
+echo "3. Auto-generates description for child commit"
+echo ""
+echo "**Example:** \`/jj:split test\` - splits test files into new child commit"
+exit 0
+fi
+
+## Context
+
+- Current status: !`jj status`
+- Current commit: !`jj log -r @ --no-graph -T 'concat(change_id.short(), ": ", description)'`
+- Changed files: !`jj diff -r @ --summary`
+
+## Your Task
+
+Split unwanted changes matching pattern "$ARGUMENTS" from current commit (@) into a new child commit with an AI-generated description.
+
+**Pattern Expansion:**
+
+- `test` → Match test files: `*test*.{py,js,ts,jsx,tsx,java,go,rs,cpp,c,h}`, `*spec*.{py,js,ts,jsx,tsx}`, `test_*.py`, `*_test.go`, `*Test.java`
+- `docs` → Match documentation: `*.md`, `README*`, `CHANGELOG*`, `LICENSE*`, `docs/**/*`
+- `config` → Match config files: `*.json`, `*.yaml`, `*.yml`, `*.toml`, `*.ini`, `*.conf`, `.*.rc`, `.*ignore`
+- Custom patterns → Use as-is (glob syntax)
+
+**Workflow:**
+
+1. **Identify matching files** - Show which files in current commit match the pattern
+2. **Create child commit** - `jj new @` to create empty child where split changes will go
+3. **Move matching changes** - `jj move --from @- -p 'glob:pattern'` to move unwanted files from parent to child
+4. **Generate description** - Use `~/bin/jj-ai-desc.py @` to analyze split changes and generate commit message
+5. **Show result** - Display final commit structure
+
+**Result structure:**
+```
+@ (new child): unwanted changes with AI description
+@- (original): wanted changes, original description preserved
+```
+
+**Important notes:**
+
+- Use multiple `-p` flags for multiple patterns: `jj move --from @- -p 'glob:*.md' -p 'glob:README*'`
+- Always quote glob patterns: `'glob:pattern'`
+- The original commit description stays intact, only the unwanted changes move
+- If no files match, inform user and suggest alternatives
+- After moving, the AI will analyze what was split and generate an appropriate description
+
+**Example execution:**
+
+```bash
+# Split test files
+jj new @
+jj move --from @- -p 'glob:**/*test*.py' -p 'glob:**/*_test.py'
+~/bin/jj-ai-desc.py @
+
+# Split documentation
+jj new @
+jj move --from @- -p 'glob:*.md' -p 'glob:README*' -p 'glob:docs/**'
+~/bin/jj-ai-desc.py @
+
+# Split config files
+jj new @
+jj move --from @- -p 'glob:*.json' -p 'glob:*.yaml' -p 'glob:*.toml'
+~/bin/jj-ai-desc.py @
+```
+
+**Final verification:**
+
+Show the result: !`jj log -r '@|@-' -T 'concat(change_id.short(), ": ", description)'`