fix: standardize on file extension .yaml instead of a mix of yml and yaml

bmad-core/agents/bmad-master.md

@@ -2,7 +2,7 @@
 
 CRITICAL: Read the full YML to understand your operating params, start activation to alter your state of being, follow startup instructions, stay in this being until told to exit this mode:
 
-```yml
+```yaml
 root: .bmad-core
 IDE-FILE-RESOLUTION: Dependencies map to files as {root}/{type}/{name}.md where root=".bmad-core", type=folder (tasks/templates/checklists/utils), name=dependency name.
 REQUEST-RESOLUTION: Match user requests to your commands/dependencies flexibly (e.g., "draft story"→*create→create-next-story task, "make a new prd" would be dependencies->tasks->create-doc combined with the dependencies->templates->prd-tmpl.md), or ask for clarification if ambiguous.

bmad-core/agents/dev.md

@@ -2,7 +2,7 @@
 
 CRITICAL: Read the full YML, start activation to alter your state of being, follow startup section instructions, stay in this being until told to exit this mode:
 
-```yml
+```yaml
 root: .bmad-core
 IDE-FILE-RESOLUTION: Dependencies map to files as {root}/{type}/{name}.md where root=".bmad-core", type=folder (tasks/templates/checklists/utils), name=dependency name.
 REQUEST-RESOLUTION: Match user requests to your commands/dependencies flexibly (e.g., "draft story"→*create→create-next-story task, "make a new prd" would be dependencies->tasks->create-doc combined with the dependencies->templates->prd-tmpl.md), or ask for clarification if ambiguous.
@@ -16,7 +16,7 @@ agent:
 
 startup:
   - Announce: Greet the user with your name and role, and inform of the *help command.
-  - CRITICAL: Load .bmad-core/core-config.yml and read devLoadAlwaysFiles list and devDebugLog values
+  - CRITICAL: Load .bmad-core/core-config.yaml and read devLoadAlwaysFiles list and devDebugLog values
   - CRITICAL: Load ONLY files specified in devLoadAlwaysFiles. If any missing, inform user but continue
   - CRITICAL: Do NOT load any story files during startup unless user requested you do
   - CRITICAL: Do NOT begin development until told to proceed

bmad-core/agents/pm.md

@@ -2,7 +2,7 @@
 
 CRITICAL: Read the full YML, start activation to alter your state of being, follow startup section instructions, stay in this being until told to exit this mode:
 
-```yml
+```yaml
 root: .bmad-core
 IDE-FILE-RESOLUTION: Dependencies map to files as {root}/{type}/{name}.md where root=".bmad-core", type=folder (tasks/templates/checklists/utils), name=dependency name.
 REQUEST-RESOLUTION: Match user requests to your commands/dependencies flexibly (e.g., "draft story"→*create→create-next-story task, "make a new prd" would be dependencies->tasks->create-doc combined with the dependencies->templates->prd-tmpl.md), or ask for clarification if ambiguous.

bmad-core/agents/po.md

@@ -2,7 +2,7 @@
 
 CRITICAL: Read the full YML, start activation to alter your state of being, follow startup section instructions, stay in this being until told to exit this mode:
 
-```yml
+```yaml
 root: .bmad-core
 IDE-FILE-RESOLUTION: Dependencies map to files as {root}/{type}/{name}.md where root=".bmad-core", type=folder (tasks/templates/checklists/utils), name=dependency name.
 REQUEST-RESOLUTION: Match user requests to your commands/dependencies flexibly (e.g., "draft story"→*create→create-next-story task, "make a new prd" would be dependencies->tasks->create-doc combined with the dependencies->templates->prd-tmpl.md), or ask for clarification if ambiguous.

bmad-core/data/bmad-kb.md

@@ -161,11 +161,11 @@ npx bmad-method install
 5. **MUST switch to Dev agent** for implementation
 6. Keep planning and coding in separate chat sessions
 
-## Core Configuration (core-config.yml)
+## Core Configuration (core-config.yaml)
 
-**New in V4**: The `bmad-core/core-config.yml` file is a critical innovation that enables BMAD to work seamlessly with any project structure, providing maximum flexibility and backwards compatibility.
+**New in V4**: The `bmad-core/core-config.yaml` file is a critical innovation that enables BMAD to work seamlessly with any project structure, providing maximum flexibility and backwards compatibility.
 
-### What is core-config.yml?
+### What is core-config.yaml?
 
 This configuration file acts as a map for BMAD agents, telling them exactly where to find your project documents and how they're structured. It enables:
 
@@ -337,7 +337,7 @@ The BMAD-Method is built around a modular architecture centered on the `bmad-cor
 
 #### 2. Agent Teams (`bmad-core/agent-teams/`)
 - **Purpose**: Define collections of agents bundled together for specific purposes
-- **Examples**: `team-all.yml` (comprehensive bundle), `team-fullstack.yml` (full-stack development)
+- **Examples**: `team-all.yaml` (comprehensive bundle), `team-fullstack.yaml` (full-stack development)
 - **Usage**: Creates pre-packaged contexts for web UI environments
 
 #### 3. Workflows (`bmad-core/workflows/`)

bmad-core/tasks/create-brownfield-story.md

@@ -28,7 +28,7 @@ Create detailed, implementation-ready stories for brownfield projects where trad
 
 #### 0.1 Check Workflow Plan
 
-- Load core-config.yml and check if `workflow.trackProgress: true`
+- Load core-config.yaml and check if `workflow.trackProgress: true`
 - If yes, check for active plan at `workflow.planFile`
 - If plan exists:
   - Verify story creation aligns with current plan step

bmad-core/tasks/create-next-story.md

@@ -10,12 +10,12 @@ To identify the next logical story based on project progress and epic definition
 
 [[LLM: CRITICAL - This MUST be your first step]]
 
-- Load `.bmad-core/core-config.yml` from the project root
+- Load `.bmad-core/core-config.yaml` from the project root
 - If the file does not exist:
-  - HALT and inform the user: "core-config.yml not found. This file is required for story creation. You can:
-    1. Copy it from GITHUB BMAD-METHOD/bmad-core/core-config.yml and configure it for your project
+  - HALT and inform the user: "core-config.yaml not found. This file is required for story creation. You can:
+    1. Copy it from GITHUB BMAD-METHOD/bmad-core/core-config.yaml and configure it for your project
     2. Run the BMAD installer against your project to upgrade and add the file automatically
-    Please add and configure core-config.yml before proceeding."
+    Please add and configure core-config.yaml before proceeding."
 - Extract the following key configurations:
   - `devStoryLocation`: Where to save story files
   - `prd.prdSharded`: Whether PRD is sharded or monolithic

bmad-core/tasks/shard-doc.md

@@ -8,20 +8,20 @@
 
 ## Primary Method: Automatic with markdown-tree
 
-[[LLM: First, check if markdownExploder is set to true in bmad-core/core-config.yml. If it is, attempt to run the command: `md-tree explode {input file} {output path}`.
+[[LLM: First, check if markdownExploder is set to true in bmad-core/core-config.yaml. If it is, attempt to run the command: `md-tree explode {input file} {output path}`.
 
 If the command succeeds, inform the user that the document has been sharded successfully and STOP - do not proceed further.
 
 If the command fails (especially with an error indicating the command is not found or not available), inform the user: "The markdownExploder setting is enabled but the md-tree command is not available. Please either:
 
 1. Install @kayvan/markdown-tree-parser globally with: `npm install -g @kayvan/markdown-tree-parser`
-2. Or set markdownExploder to false in bmad-core/core-config.yml
+2. Or set markdownExploder to false in bmad-core/core-config.yaml
 
 **IMPORTANT: STOP HERE - do not proceed with manual sharding until one of the above actions is taken.**"
 
 If markdownExploder is set to false, inform the user: "The markdownExploder setting is currently false. For better performance and reliability, you should:
 
-1. Set markdownExploder to true in bmad-core/core-config.yml
+1. Set markdownExploder to true in bmad-core/core-config.yaml
 2. Install @kayvan/markdown-tree-parser globally with: `npm install -g @kayvan/markdown-tree-parser`
 
 I will now proceed with the manual sharding process."

bmad-core/tasks/update-workflow-plan.md

@@ -8,7 +8,7 @@ Update the status of steps in an active workflow plan, mark completions, add not
 
 ### 0. Load Plan Configuration
 
-[[LLM: First load core-config.yml to get plan settings]]
+[[LLM: First load core-config.yaml to get plan settings]]
 
 Check workflow configuration:
 

bmad-core/templates/architecture-tmpl.md

@@ -396,7 +396,7 @@ After presenting the structure, apply `tasks#advanced-elicitation` protocol to r
 {{project-root}}/
 ├── .github/                    # CI/CD workflows
 │   └── workflows/
-│       └── main.yml
+│       └── main.yaml
 ├── .vscode/                    # VSCode settings (optional)
 │   └── settings.json
 ├── build/                      # Compiled output (git-ignored)

bmad-core/templates/fullstack-architecture-tmpl.md

@@ -288,7 +288,7 @@ Use appropriate format for the chosen API style. If no API (e.g., static site),
 
 ^^CONDITION: has_rest_api^^
 
-```yml
+```yaml
 openapi: 3.0.0
 info:
   title:
@@ -644,8 +644,8 @@ After presenting this section, apply `tasks#advanced-elicitation` protocol]]
 {{project-name}}/
 ├── .github/                    # CI/CD workflows
 │   └── workflows/
-│       ├── ci.yml
-│       └── deploy.yml
+│       ├── ci.yaml
+│       └── deploy.yaml
 ├── apps/                       # Application packages
 │   ├── web/                    # Frontend application
 │   │   ├── src/

bmad-core/utils/plan-management.md

@@ -13,7 +13,7 @@ Provides utilities for agents and tasks to interact with workflow plans, check p
 ```
 Check for workflow plan:
 1. Look for docs/workflow-plan.md (default location)
-2. Check core-config.yml for custom plan location
+2. Check core-config.yaml for custom plan location
 3. Return plan status (exists/not exists)
 ```