fix: restore forge case and revert copilot path change

Address PR review feedback:
- Restore forge) case in update_specific_agent since
  src/specify_cli/integrations/forge/__init__.py still exists
- Revert COPILOT_FILE path from .github/agents/ back to .github/
  to stay consistent with Python integration and tests
- Restore FORGE_FILE variable, comments, and usage strings

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Bo Bobson

scripts/bash/update-agent-context.sh

@@ -30,12 +30,12 @@
 #
 # 5. Multi-Agent Support
 #    - Handles agent-specific file paths and naming conventions
-#    - Supports: Claude, Gemini, Copilot, Cursor, Qwen, opencode, Codex, Windsurf, Junie, Kilo Code, Auggie CLI, Roo Code, CodeBuddy CLI, Qoder CLI, Amp, SHAI, Tabnine CLI, Kiro CLI, Mistral Vibe, Kimi Code, Pi Coding Agent, iFlow CLI, Antigravity or Generic
+#    - Supports: Claude, Gemini, Copilot, Cursor, Qwen, opencode, Codex, Windsurf, Junie, Kilo Code, Auggie CLI, Roo Code, CodeBuddy CLI, Qoder CLI, Amp, SHAI, Tabnine CLI, Kiro CLI, Mistral Vibe, Kimi Code, Pi Coding Agent, iFlow CLI, Forge, Antigravity or Generic
 #    - Can update single agents or all existing agent files
 #    - Creates default Claude file if no agent files exist
 #
 # Usage: ./update-agent-context.sh [agent_type]
-# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|junie|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic
+# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|junie|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|forge|generic
 # Leave empty to update all existing agent files
 
 set -e
@@ -63,7 +63,7 @@ AGENT_TYPE="${1:-}"
 # Agent-specific file paths  
 CLAUDE_FILE="$REPO_ROOT/CLAUDE.md"
 GEMINI_FILE="$REPO_ROOT/GEMINI.md"
-COPILOT_FILE="$REPO_ROOT/.github/agents/copilot-instructions.md"
+COPILOT_FILE="$REPO_ROOT/.github/copilot-instructions.md"
 CURSOR_FILE="$REPO_ROOT/.cursor/rules/specify-rules.mdc"
 QWEN_FILE="$REPO_ROOT/QWEN.md"
 AGENTS_FILE="$REPO_ROOT/AGENTS.md"
@@ -74,7 +74,7 @@ AUGGIE_FILE="$REPO_ROOT/.augment/rules/specify-rules.md"
 ROO_FILE="$REPO_ROOT/.roo/rules/specify-rules.md"
 CODEBUDDY_FILE="$REPO_ROOT/CODEBUDDY.md"
 QODER_FILE="$REPO_ROOT/QODER.md"
-# Amp, Kiro CLI, IBM Bob, and Pi all share AGENTS.md — use AGENTS_FILE to avoid
+# Amp, Kiro CLI, IBM Bob, Pi, and Forge all share AGENTS.md — use AGENTS_FILE to avoid
 # updating the same file multiple times.
 AMP_FILE="$AGENTS_FILE"
 SHAI_FILE="$REPO_ROOT/SHAI.md"
@@ -86,6 +86,7 @@ VIBE_FILE="$REPO_ROOT/.vibe/agents/specify-agents.md"
 KIMI_FILE="$REPO_ROOT/KIMI.md"
 TRAE_FILE="$REPO_ROOT/.trae/rules/AGENTS.md"
 IFLOW_FILE="$REPO_ROOT/IFLOW.md"
+FORGE_FILE="$AGENTS_FILE"
 
 # Template file
 TEMPLATE_FILE="$REPO_ROOT/.specify/templates/agent-file-template.md"
@@ -701,12 +702,15 @@ update_specific_agent() {
         iflow)
             update_agent_file "$IFLOW_FILE" "iFlow CLI" || return 1
             ;;
+        forge)
+            update_agent_file "$AGENTS_FILE" "Forge" || return 1
+            ;;
         generic)
             log_info "Generic agent: no predefined context file. Use the agent-specific update script for your agent."
             ;;
         *)
             log_error "Unknown agent type '$agent_type'"
-            log_error "Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|junie|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic"
+            log_error "Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|junie|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|forge|generic"
             exit 1
             ;;
     esac
@@ -754,6 +758,7 @@ update_all_existing_agents() {
     _update_if_new "$AMP_FILE" "Amp"                       || _all_ok=false
     _update_if_new "$KIRO_FILE" "Kiro CLI"                 || _all_ok=false
     _update_if_new "$BOB_FILE" "IBM Bob"                   || _all_ok=false
+    _update_if_new "$FORGE_FILE" "Forge"                   || _all_ok=false
     _update_if_new "$WINDSURF_FILE" "Windsurf"             || _all_ok=false
     _update_if_new "$JUNIE_FILE" "Junie"                || _all_ok=false
     _update_if_new "$KILOCODE_FILE" "Kilo Code"            || _all_ok=false
@@ -794,7 +799,7 @@ print_summary() {
     fi
 
     echo
-    log_info "Usage: $0 [claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|junie|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic]"
+    log_info "Usage: $0 [claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|junie|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|forge|generic]"
 }
 
 #==============================================================================