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

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: