feat: Claude Code slash commands for Task Master (#774)

* Fix Cursor deeplink installation with copy-paste instructions (#723)

* fix: expand-task (#755)

* docs: Update o3 model price (#751)

* docs: Auto-update and format models.md

* docs: Auto-update and format models.md

* feat: Add Claude Code task master commands

Adds Task Master slash commands for Claude Code under /project:tm/ namespace

---------

Co-authored-by: Joe Danziger <joe@ticc.net>
Co-authored-by: Ralph Khreish <35776126+Crunchyman-ralph@users.noreply.github.com>
Co-authored-by: Volodymyr Zahorniak <7808206+zahorniak@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: neno-is-ooo <204701868+neno-is-ooo@users.noreply.github.com>

.claude/commands/tm/add-subtask/from-task.md

@@ -0,0 +1,71 @@
+Convert an existing task into a subtask.
+
+Arguments: $ARGUMENTS
+
+Parse parent ID and task ID to convert.
+
+## Task Conversion
+
+Converts an existing standalone task into a subtask of another task.
+
+## Argument Parsing
+
+- "move task 8 under 5"
+- "make 8 a subtask of 5"
+- "nest 8 in 5"
+- "5 8" → make task 8 a subtask of task 5
+
+## Execution
+
+```bash
+task-master add-subtask --parent=<parent-id> --task-id=<task-to-convert>
+```
+
+## Pre-Conversion Checks
+
+1. **Validation**
+   - Both tasks exist and are valid
+   - No circular parent relationships
+   - Task isn't already a subtask
+   - Logical hierarchy makes sense
+
+2. **Impact Analysis**
+   - Dependencies that will be affected
+   - Tasks that depend on converting task
+   - Priority alignment needed
+   - Status compatibility
+
+## Conversion Process
+
+1. Change task ID from "8" to "5.1" (next available)
+2. Update all dependency references
+3. Inherit parent's context where appropriate
+4. Adjust priorities if needed
+5. Update time estimates
+
+## Smart Features
+
+- Preserve task history
+- Maintain dependencies
+- Update all references
+- Create conversion log
+
+## Example
+
+```
+/project:tm/add-subtask/from-task 5 8
+→ Converting: Task #8 becomes subtask #5.1
+→ Updated: 3 dependency references
+→ Parent task #5 now has 1 subtask
+→ Note: Subtask inherits parent's priority
+
+Before: #8 "Implement validation" (standalone)
+After:  #5.1 "Implement validation" (subtask of #5)
+```
+
+## Post-Conversion
+
+- Show new task hierarchy
+- List updated dependencies
+- Verify project integrity
+- Suggest related conversions

.claude/commands/tm/add-subtask/index.md

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+Add a subtask to a parent task.
+
+Arguments: $ARGUMENTS
+
+Parse arguments to create a new subtask or convert existing task.
+
+## Adding Subtasks
+
+Creates subtasks to break down complex parent tasks into manageable pieces.
+
+## Argument Parsing
+
+Flexible natural language:
+- "add subtask to 5: implement login form"
+- "break down 5 with: setup, implement, test"
+- "subtask for 5: handle edge cases"
+- "5: validate user input" → adds subtask to task 5
+
+## Execution Modes
+
+### 1. Create New Subtask
+```bash
+task-master add-subtask --parent=<id> --title="<title>" --description="<desc>"
+```
+
+### 2. Convert Existing Task
+```bash
+task-master add-subtask --parent=<id> --task-id=<existing-id>
+```
+
+## Smart Features
+
+1. **Automatic Subtask Generation**
+   - If title contains "and" or commas, create multiple
+   - Suggest common subtask patterns
+   - Inherit parent's context
+
+2. **Intelligent Defaults**
+   - Priority based on parent
+   - Appropriate time estimates
+   - Logical dependencies between subtasks
+
+3. **Validation**
+   - Check parent task complexity
+   - Warn if too many subtasks
+   - Ensure subtask makes sense
+
+## Creation Process
+
+1. Parse parent task context
+2. Generate subtask with ID like "5.1"
+3. Set appropriate defaults
+4. Link to parent task
+5. Update parent's time estimate
+
+## Example Flows
+
+```
+/project:tm/add-subtask to 5: implement user authentication
+→ Created subtask #5.1: "implement user authentication"
+→ Parent task #5 now has 1 subtask
+→ Suggested next subtasks: tests, documentation
+
+/project:tm/add-subtask 5: setup, implement, test
+→ Created 3 subtasks:
+  #5.1: setup
+  #5.2: implement  
+  #5.3: test
+```
+
+## Post-Creation
+
+- Show updated task hierarchy
+- Suggest logical next subtasks
+- Update complexity estimates
+- Recommend subtask order