Remove capitalized duplicates and add deduplication rule to agent

- Remove capitalized duplicate entries from toolNames.json: Agent, Glob,
  Grep, Read, Write, Edit, Skill, ToolSearch (lowercase variants already exist)
- Remove capitalized duplicates from automaticTools.json: Read, Grep, Glob,
  ToolSearch
- Update tool-names.agent.md with case-insensitive deduplication rule to
  prevent re-adding PascalCase variants when lowercase form already exists

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rajbos

.github/agents/tool-names.agent.md

@@ -124,6 +124,7 @@ When adding a new tool to `toolNames.json`, also determine if it belongs in `aut
 - The file is a plain JSON array of tool ID strings
 - Add new entries at the end of the array (before the closing `]`)
 - Keep related tool variants together (e.g., all variants of `read_file`)
+- **Case-insensitive deduplication**: Before adding a tool ID, check if a differently-cased variant (e.g., lowercase equivalent) is already in the array. If `grep` is already there, do **not** add `Grep`. Only add a capitalized variant if the lowercase form is absent.
 
 
 
@@ -134,6 +135,7 @@ When adding a new tool to `toolNames.json`, also determine if it belongs in `aut
 - Insert new MCP entries near existing entries with the same prefix
 - Insert new non-MCP entries alphabetically or near logically related tools
 - Never remove existing entries
+- **Case-insensitive deduplication**: Before adding a new tool ID, check whether a lowercase (or differently-cased) variant already exists. If `grep` is already mapped, do **not** add `Grep`. If `tool_search` is already mapped, do **not** add `ToolSearch`. The lookup code handles exact-match only, so capitalized variants do map differently — but if both would resolve to the *exact same friendly name*, skip the duplicate. Only add a capitalized variant when it has a meaningfully different name or the lowercase form does not exist at all.
 
 ### Validation
 

vscode-extension/src/automaticTools.json

@@ -2,7 +2,6 @@
   "read_file",
   "copilot_readFile",
   "read",
-  "Read",
   "view",
   "view_image",
   "copilot_viewImage",
@@ -22,9 +21,7 @@
 
   "grep_search",
   "grep",
-  "Grep",
   "glob",
-  "Glob",
 
   "semantic_search",
   "copilot_searchCodebase",
@@ -74,7 +71,6 @@
   "tool_replay",
   "copilot_toolReplay",
   "tool_search",
-  "ToolSearch",
 
   "get_task_output",
   "get_output_window_logs",

vscode-extension/src/toolNames.json

@@ -187,7 +187,6 @@
   ,"test_search": "Test Search"
   ,"tool_replay": "Tool Replay"
   ,"tool_search": "Tool Search"
-  ,"ToolSearch": "Tool Search"
   ,"vscode_askQuestions": "VSCode Ask Questions"
   ,"vscode_get_confirmation": "VSCode Get Confirmation"
   ,"vscode_get_confirmation_with_options": "VSCode Get Confirmation With Options"
@@ -317,20 +316,16 @@
   ,"claude-code": "Claude Code"
   ,"copilot-cloud-agent": "Copilot Cloud Agent"
   ,"agent": "Agent"
-  ,"Agent": "Agent"
   ,"copilotcli": "Copilot CLI"
   ,"github.copilot.default": "GitHub Copilot Default"
   ,"github.copilot.workspace": "GitHub Copilot Workspace"
   ,"github.copilot.vscode": "GitHub Copilot VSCode"
   ,"github.copilot-dynamic.platform": "GitHub Copilot Dynamic: Platform"
   ,"glob": "Glob"
-  ,"Glob": "Glob"
   ,"file_glob_search": "File Glob Search"
   ,"grep": "Grep"
-  ,"Grep": "Grep"
   ,"kill_terminal": "Kill Terminal"
   ,"read": "Read"
-  ,"Read": "Read"
   ,"view": "View"
   ,"vscode_editFile_internal": "VSCode Edit File (Internal)"
   ,"vscode_fetchWebPage_internal": "VSCode Fetch Web Page (Internal)"
@@ -344,15 +339,12 @@
   ,"webfetch": "Web Fetch"
   ,"web_fetch": "Web Fetch"
   ,"write": "Write"
-  ,"Write": "Write"
   ,"edit": "Edit"
-  ,"Edit": "Edit"
   ,"search_replace": "Search Replace"
   ,"write_file": "Write File"
   ,"multiedit": "Multi Edit"
   ,"question": "Question"
   ,"skill": "Skill"
-  ,"Skill": "Skill"
   ,"read_skill": "Read Skill"
   ,"task": "Task"
   ,"todowrite": "Todo Write"