diff --git a/scripts/fish/update-agent-context.fish b/scripts/fish/update-agent-context.fish
new file mode 100644
index 0000000000..d0f6596d7b
--- /dev/null
+++ b/scripts/fish/update-agent-context.fish
@@ -0,0 +1,770 @@
+#!/usr/bin/env fish
+
+# Update agent context files with information from plan.md (Fish shell version)
+#
+# This script maintains AI agent context files by parsing feature specifications 
+# and updating agent-specific configuration files with project information.
+#
+# MAIN FUNCTIONS:
+# 1. Environment Validation
+#    - Verifies git repository structure and branch information
+#    - Checks for required plan.md files and templates
+#    - Validates file permissions and accessibility
+#
+# 2. Plan Data Extraction
+#    - Parses plan.md files to extract project metadata
+#    - Identifies language/version, frameworks, databases, and project types
+#    - Handles missing or incomplete specification data gracefully
+#
+# 3. Agent File Management
+#    - Creates new agent context files from templates when needed
+#    - Updates existing agent files with new project information
+#    - Preserves manual additions and custom configurations
+#    - Supports multiple AI agent formats and directory structures
+#
+# 4. Content Generation
+#    - Generates language-specific build/test commands
+#    - Creates appropriate project directory structures
+#    - Updates technology stacks and recent changes sections
+#    - Maintains consistent formatting and timestamps
+#
+# 5. Multi-Agent Support
+#    - Handles agent-specific file paths and naming conventions
+#    - Supports: Claude, Gemini, Copilot, Cursor, Qwen, opencode, Codex, Windsurf, Kilo Code, Auggie CLI, Roo Code, CodeBuddy CLI, Qoder CLI, Amp, SHAI, or Amazon Q Developer CLI
+#    - Can update single agents or all existing agent files
+#    - Creates default Claude file if no agent files exist
+#
+# Usage: ./update-agent-context.fish [agent_type]
+# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|shai|q|bob|qoder
+# Leave empty to update all existing agent files
+
+#==============================================================================
+# Configuration and Global Variables
+#==============================================================================
+
+# Get script directory and load common functions
+set SCRIPT_DIR (dirname (status --current-filename))
+source "$SCRIPT_DIR/common.fish"
+
+# Get all paths and variables from common functions
+eval (get_feature_paths)
+
+set NEW_PLAN "$IMPL_PLAN"  # Alias for compatibility with existing code
+set AGENT_TYPE $argv[1]
+
+# Agent-specific file paths  
+set CLAUDE_FILE "$REPO_ROOT/CLAUDE.md"
+set GEMINI_FILE "$REPO_ROOT/GEMINI.md"
+set COPILOT_FILE "$REPO_ROOT/.github/agents/copilot-instructions.md"
+set CURSOR_FILE "$REPO_ROOT/.cursor/rules/specify-rules.mdc"
+set QWEN_FILE "$REPO_ROOT/QWEN.md"
+set AGENTS_FILE "$REPO_ROOT/AGENTS.md"
+set WINDSURF_FILE "$REPO_ROOT/.windsurf/rules/specify-rules.md"
+set KILOCODE_FILE "$REPO_ROOT/.kilocode/rules/specify-rules.md"
+set AUGGIE_FILE "$REPO_ROOT/.augment/rules/specify-rules.md"
+set ROO_FILE "$REPO_ROOT/.roo/rules/specify-rules.md"
+set CODEBUDDY_FILE "$REPO_ROOT/CODEBUDDY.md"
+set QODER_FILE "$REPO_ROOT/QODER.md"
+set AMP_FILE "$REPO_ROOT/AGENTS.md"
+set SHAI_FILE "$REPO_ROOT/SHAI.md"
+set Q_FILE "$REPO_ROOT/AGENTS.md"
+set BOB_FILE "$REPO_ROOT/AGENTS.md"
+
+# Template file
+set TEMPLATE_FILE "$REPO_ROOT/.specify/templates/agent-file-template.md"
+
+# Global variables for parsed plan data
+set NEW_LANG ""
+set NEW_FRAMEWORK ""
+set NEW_DB ""
+set NEW_PROJECT_TYPE ""
+
+#==============================================================================
+# Utility Functions
+#==============================================================================
+
+function log_info
+    echo "INFO: $argv"
+end
+
+function log_success
+    echo "✓ $argv"
+end
+
+function log_error
+    echo "ERROR: $argv" >&2
+end
+
+function log_warning
+    echo "WARNING: $argv" >&2
+end
+
+# Cleanup function for temporary files
+function cleanup
+    rm -f /tmp/agent_update_*_%self
+    rm -f /tmp/manual_additions_%self
+end
+
+# Set up cleanup trap
+trap cleanup EXIT INT TERM
+
+#==============================================================================
+# Validation Functions
+#==============================================================================
+
+function validate_environment
+    # Check if we have a current branch/feature (git or non-git)
+    if test -z "$CURRENT_BRANCH"
+        log_error "Unable to determine current feature"
+        if test "$HAS_GIT" = "true"
+            log_info "Make sure you're on a feature branch"
+        else
+            log_info "Set SPECIFY_FEATURE environment variable or create a feature first"
+        end
+        exit 1
+    end
+    
+    # Check if plan.md exists
+    if not test -f "$NEW_PLAN"
+        log_error "No plan.md found at $NEW_PLAN"
+        log_info "Make sure you're working on a feature with a corresponding spec directory"
+        if test "$HAS_GIT" != "true"
+            log_info "Use: export SPECIFY_FEATURE=your-feature-name or create a new feature first"
+        end
+        exit 1
+    end
+    
+    # Check if template exists (needed for new files)
+    if not test -f "$TEMPLATE_FILE"
+        log_warning "Template file not found at $TEMPLATE_FILE"
+        log_warning "Creating new agent files will fail"
+    end
+end
+
+#==============================================================================
+# Plan Parsing Functions
+#==============================================================================
+
+function extract_plan_field
+    set field_pattern $argv[1]
+    set plan_file $argv[2]
+    
+    set result (grep "^\*\*$field_pattern\*\*: " "$plan_file" 2>/dev/null | \
+        head -1 | \
+        sed "s|^\*\*$field_pattern\*\*: ||" | \
+        sed 's/^[ \t]*//;s/[ \t]*$//' | \
+        grep -v "NEEDS CLARIFICATION" | \
+        grep -v "^N/A\$")
+    
+    if test -n "$result"
+        echo "$result"
+    else
+        echo ""
+    end
+end
+
+function parse_plan_data
+    set plan_file $argv[1]
+    
+    if not test -f "$plan_file"
+        log_error "Plan file not found: $plan_file"
+        return 1
+    end
+    
+    if not test -r "$plan_file"
+        log_error "Plan file is not readable: $plan_file"
+        return 1
+    end
+    
+    log_info "Parsing plan data from $plan_file"
+    
+    set -g NEW_LANG (extract_plan_field "Language/Version" "$plan_file")
+    set -g NEW_FRAMEWORK (extract_plan_field "Primary Dependencies" "$plan_file")
+    set -g NEW_DB (extract_plan_field "Storage" "$plan_file")
+    set -g NEW_PROJECT_TYPE (extract_plan_field "Project Type" "$plan_file")
+    
+    # Log what we found
+    if test -n "$NEW_LANG"
+        log_info "Found language: $NEW_LANG"
+    else
+        log_warning "No language information found in plan"
+    end
+    
+    if test -n "$NEW_FRAMEWORK"
+        log_info "Found framework: $NEW_FRAMEWORK"
+    end
+    
+    if test -n "$NEW_DB"; and test "$NEW_DB" != "N/A"
+        log_info "Found database: $NEW_DB"
+    end
+    
+    if test -n "$NEW_PROJECT_TYPE"
+        log_info "Found project type: $NEW_PROJECT_TYPE"
+    end
+end
+
+function format_technology_stack
+    set lang $argv[1]
+    set framework $argv[2]
+    set parts
+    
+    # Add non-empty parts
+    if test -n "$lang"; and test "$lang" != "NEEDS CLARIFICATION"
+        set -a parts "$lang"
+    end
+    if test -n "$framework"; and test "$framework" != "NEEDS CLARIFICATION"; and test "$framework" != "N/A"
+        set -a parts "$framework"
+    end
+    
+    # Join with proper formatting
+    if test (count $parts) -eq 0
+        echo ""
+    else if test (count $parts) -eq 1
+        echo "$parts[1]"
+    else
+        # Join multiple parts with " + "
+        set result "$parts[1]"
+        for i in (seq 2 (count $parts))
+            set result "$result + $parts[$i]"
+        end
+        echo "$result"
+    end
+end
+
+#==============================================================================
+# Template and Content Generation Functions
+#==============================================================================
+
+function get_project_structure
+    set project_type $argv[1]
+    
+    if string match -q "*web*" "$project_type"
+        echo "backend/\\nfrontend/\\ntests/"
+    else
+        echo "src/\\ntests/"
+    end
+end
+
+function get_commands_for_language
+    set lang $argv[1]
+    
+    switch "$lang"
+        case "*Python*"
+            echo "cd src && pytest && ruff check ."
+        case "*Rust*"
+            echo "cargo test && cargo clippy"
+        case "*JavaScript*" "*TypeScript*"
+            echo "npm test \\&\\& npm run lint"
+        case "*"
+            echo "# Add commands for $lang"
+    end
+end
+
+function get_language_conventions
+    set lang $argv[1]
+    echo "$lang: Follow standard conventions"
+end
+
+function create_new_agent_file
+    set target_file $argv[1]
+    set temp_file $argv[2]
+    set project_name $argv[3]
+    set current_date $argv[4]
+    
+    if not test -f "$TEMPLATE_FILE"
+        log_error "Template not found at $TEMPLATE_FILE"
+        return 1
+    end
+    
+    if not test -r "$TEMPLATE_FILE"
+        log_error "Template file is not readable: $TEMPLATE_FILE"
+        return 1
+    end
+    
+    log_info "Creating new agent context file from template..."
+    
+    if not cp "$TEMPLATE_FILE" "$temp_file"
+        log_error "Failed to copy template file"
+        return 1
+    end
+    
+    # Replace template placeholders
+    set project_structure (get_project_structure "$NEW_PROJECT_TYPE")
+    set commands (get_commands_for_language "$NEW_LANG")
+    set language_conventions (get_language_conventions "$NEW_LANG")
+    
+    # Escape special characters for sed
+    set escaped_lang (printf '%s\n' "$NEW_LANG" | sed 's/[\[\.*^$()+{}|]/\\&/g')
+    set escaped_framework (printf '%s\n' "$NEW_FRAMEWORK" | sed 's/[\[\.*^$()+{}|]/\\&/g')
+    set escaped_branch (printf '%s\n' "$CURRENT_BRANCH" | sed 's/[\[\.*^$()+{}|]/\\&/g')
+    
+    # Build technology stack and recent change strings conditionally
+    if test -n "$escaped_lang"; and test -n "$escaped_framework"
+        set tech_stack "- $escaped_lang + $escaped_framework ($escaped_branch)"
+    else if test -n "$escaped_lang"
+        set tech_stack "- $escaped_lang ($escaped_branch)"
+    else if test -n "$escaped_framework"
+        set tech_stack "- $escaped_framework ($escaped_branch)"
+    else
+        set tech_stack "- ($escaped_branch)"
+    end
+
+    if test -n "$escaped_lang"; and test -n "$escaped_framework"
+        set recent_change "- $escaped_branch: Added $escaped_lang + $escaped_framework"
+    else if test -n "$escaped_lang"
+        set recent_change "- $escaped_branch: Added $escaped_lang"
+    else if test -n "$escaped_framework"
+        set recent_change "- $escaped_branch: Added $escaped_framework"
+    else
+        set recent_change "- $escaped_branch: Added"
+    end
+
+    set substitutions \
+        "s|\[PROJECT NAME\]|$project_name|" \
+        "s|\[DATE\]|$current_date|" \
+        "s|\[EXTRACTED FROM ALL PLAN.MD FILES\]|$tech_stack|" \
+        "s|\[ACTUAL STRUCTURE FROM PLANS\]|$project_structure|g" \
+        "s|\[ONLY COMMANDS FOR ACTIVE TECHNOLOGIES\]|$commands|" \
+        "s|\[LANGUAGE-SPECIFIC, ONLY FOR LANGUAGES IN USE\]|$language_conventions|" \
+        "s|\[LAST 3 FEATURES AND WHAT THEY ADDED\]|$recent_change|"
+    
+    for substitution in $substitutions
+        if not sed -i.bak -e "$substitution" "$temp_file"
+            log_error "Failed to perform substitution: $substitution"
+            rm -f "$temp_file" "$temp_file.bak"
+            return 1
+        end
+    end
+    
+    # Convert \n sequences to actual newlines
+    set newline (printf '\n')
+    sed -i.bak2 "s/\\\\n/$newline/g" "$temp_file"
+    
+    # Clean up backup files
+    rm -f "$temp_file.bak" "$temp_file.bak2"
+    
+    return 0
+end
+
+function update_existing_agent_file
+    set target_file $argv[1]
+    set current_date $argv[2]
+    
+    log_info "Updating existing agent context file..."
+    
+    # Use a single temporary file for atomic update
+    set temp_file (mktemp)
+    if test $status -ne 0
+        log_error "Failed to create temporary file"
+        return 1
+    end
+    
+    # Process the file in one pass
+    set tech_stack (format_technology_stack "$NEW_LANG" "$NEW_FRAMEWORK")
+    set new_tech_entries
+    set new_change_entry ""
+    
+    # Prepare new technology entries
+    if test -n "$tech_stack"; and not grep -q "$tech_stack" "$target_file"
+        set -a new_tech_entries "- $tech_stack ($CURRENT_BRANCH)"
+    end
+    
+    if test -n "$NEW_DB"; and test "$NEW_DB" != "N/A"; and test "$NEW_DB" != "NEEDS CLARIFICATION"; and not grep -q "$NEW_DB" "$target_file"
+        set -a new_tech_entries "- $NEW_DB ($CURRENT_BRANCH)"
+    end
+    
+    # Prepare new change entry
+    if test -n "$tech_stack"
+        set new_change_entry "- $CURRENT_BRANCH: Added $tech_stack"
+    else if test -n "$NEW_DB"; and test "$NEW_DB" != "N/A"; and test "$NEW_DB" != "NEEDS CLARIFICATION"
+        set new_change_entry "- $CURRENT_BRANCH: Added $NEW_DB"
+    end
+    
+    # Check if sections exist in the file
+    set has_active_technologies 0
+    set has_recent_changes 0
+    
+    if grep -q "^## Active Technologies" "$target_file" 2>/dev/null
+        set has_active_technologies 1
+    end
+    
+    if grep -q "^## Recent Changes" "$target_file" 2>/dev/null
+        set has_recent_changes 1
+    end
+    
+    # Process file line by line
+    set in_tech_section false
+    set in_changes_section false
+    set tech_entries_added false
+    set changes_entries_added false
+    set existing_changes_count 0
+    
+    while read -l line
+        # Handle Active Technologies section
+        if test "$line" = "## Active Technologies"
+            echo "$line" >> "$temp_file"
+            set in_tech_section true
+            continue
+        else if test "$in_tech_section" = "true"; and string match -qr '^##[[:space:]]' "$line"
+            # Add new tech entries before closing the section
+            if test "$tech_entries_added" = "false"; and test (count $new_tech_entries) -gt 0
+                for entry in $new_tech_entries
+                    echo "$entry" >> "$temp_file"
+                end
+                set tech_entries_added true
+            end
+            echo "$line" >> "$temp_file"
+            set in_tech_section false
+            continue
+        else if test "$in_tech_section" = "true"; and test -z "$line"
+            # Add new tech entries before empty line in tech section
+            if test "$tech_entries_added" = "false"; and test (count $new_tech_entries) -gt 0
+                for entry in $new_tech_entries
+                    echo "$entry" >> "$temp_file"
+                end
+                set tech_entries_added true
+            end
+            echo "$line" >> "$temp_file"
+            continue
+        end
+        
+        # Handle Recent Changes section
+        if test "$line" = "## Recent Changes"
+            echo "$line" >> "$temp_file"
+            # Add new change entry right after the heading
+            if test -n "$new_change_entry"
+                echo "$new_change_entry" >> "$temp_file"
+            end
+            set in_changes_section true
+            set changes_entries_added true
+            continue
+        else if test "$in_changes_section" = "true"; and string match -qr '^##[[:space:]]' "$line"
+            echo "$line" >> "$temp_file"
+            set in_changes_section false
+            continue
+        else if test "$in_changes_section" = "true"; and string match -q "- *" "$line"
+            # Keep only first 2 existing changes
+            if test $existing_changes_count -lt 2
+                echo "$line" >> "$temp_file"
+                set existing_changes_count (math $existing_changes_count + 1)
+            end
+            continue
+        end
+        
+        # Update timestamp
+        if string match -qr '\*\*Last updated\*\*:.*[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]' "$line"
+            echo "$line" | sed "s/[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]/$current_date/" >> "$temp_file"
+        else
+            echo "$line" >> "$temp_file"
+        end
+    end < "$target_file"
+    
+    # Post-loop check: if we're still in the Active Technologies section and haven't added new entries
+    if test "$in_tech_section" = "true"; and test "$tech_entries_added" = "false"; and test (count $new_tech_entries) -gt 0
+        for entry in $new_tech_entries
+            echo "$entry" >> "$temp_file"
+        end
+        set tech_entries_added true
+    end
+    
+    # If sections don't exist, add them at the end of the file
+    if test $has_active_technologies -eq 0; and test (count $new_tech_entries) -gt 0
+        echo "" >> "$temp_file"
+        echo "## Active Technologies" >> "$temp_file"
+        for entry in $new_tech_entries
+            echo "$entry" >> "$temp_file"
+        end
+        set tech_entries_added true
+    end
+    
+    if test $has_recent_changes -eq 0; and test -n "$new_change_entry"
+        echo "" >> "$temp_file"
+        echo "## Recent Changes" >> "$temp_file"
+        echo "$new_change_entry" >> "$temp_file"
+        set changes_entries_added true
+    end
+    
+    # Move temp file to target atomically
+    if not mv "$temp_file" "$target_file"
+        log_error "Failed to update target file"
+        rm -f "$temp_file"
+        return 1
+    end
+    
+    return 0
+end
+
+#==============================================================================
+# Main Agent File Update Function
+#==============================================================================
+
+function update_agent_file
+    set target_file $argv[1]
+    set agent_name $argv[2]
+    
+    if test -z "$target_file"; or test -z "$agent_name"
+        log_error "update_agent_file requires target_file and agent_name parameters"
+        return 1
+    end
+    
+    log_info "Updating $agent_name context file: $target_file"
+    
+    set project_name (basename "$REPO_ROOT")
+    set current_date (date +%Y-%m-%d)
+    
+    # Create directory if it doesn't exist
+    set target_dir (dirname "$target_file")
+    if not test -d "$target_dir"
+        if not mkdir -p "$target_dir"
+            log_error "Failed to create directory: $target_dir"
+            return 1
+        end
+    end
+    
+    if not test -f "$target_file"
+        # Create new file from template
+        set temp_file (mktemp)
+        if test $status -ne 0
+            log_error "Failed to create temporary file"
+            return 1
+        end
+        
+        if create_new_agent_file "$target_file" "$temp_file" "$project_name" "$current_date"
+            if mv "$temp_file" "$target_file"
+                log_success "Created new $agent_name context file"
+            else
+                log_error "Failed to move temporary file to $target_file"
+                rm -f "$temp_file"
+                return 1
+            end
+        else
+            log_error "Failed to create new agent file"
+            rm -f "$temp_file"
+            return 1
+        end
+    else
+        # Update existing file
+        if not test -r "$target_file"
+            log_error "Cannot read existing file: $target_file"
+            return 1
+        end
+        
+        if not test -w "$target_file"
+            log_error "Cannot write to existing file: $target_file"
+            return 1
+        end
+        
+        if update_existing_agent_file "$target_file" "$current_date"
+            log_success "Updated existing $agent_name context file"
+        else
+            log_error "Failed to update existing agent file"
+            return 1
+        end
+    end
+    
+    return 0
+end
+
+#==============================================================================
+# Agent Selection and Processing
+#==============================================================================
+
+function update_specific_agent
+    set agent_type $argv[1]
+    
+    switch "$agent_type"
+        case "claude"
+            update_agent_file "$CLAUDE_FILE" "Claude Code"
+        case "gemini"
+            update_agent_file "$GEMINI_FILE" "Gemini CLI"
+        case "copilot"
+            update_agent_file "$COPILOT_FILE" "GitHub Copilot"
+        case "cursor-agent"
+            update_agent_file "$CURSOR_FILE" "Cursor IDE"
+        case "qwen"
+            update_agent_file "$QWEN_FILE" "Qwen Code"
+        case "opencode"
+            update_agent_file "$AGENTS_FILE" "opencode"
+        case "codex"
+            update_agent_file "$AGENTS_FILE" "Codex CLI"
+        case "windsurf"
+            update_agent_file "$WINDSURF_FILE" "Windsurf"
+        case "kilocode"
+            update_agent_file "$KILOCODE_FILE" "Kilo Code"
+        case "auggie"
+            update_agent_file "$AUGGIE_FILE" "Auggie CLI"
+        case "roo"
+            update_agent_file "$ROO_FILE" "Roo Code"
+        case "codebuddy"
+            update_agent_file "$CODEBUDDY_FILE" "CodeBuddy CLI"
+        case "qoder"
+            update_agent_file "$QODER_FILE" "Qoder CLI"
+        case "amp"
+            update_agent_file "$AMP_FILE" "Amp"
+        case "shai"
+            update_agent_file "$SHAI_FILE" "SHAI"
+        case "q"
+            update_agent_file "$Q_FILE" "Amazon Q Developer CLI"
+        case "bob"
+            update_agent_file "$BOB_FILE" "IBM Bob"
+        case "*"
+            log_error "Unknown agent type '$agent_type'"
+            log_error "Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|amp|shai|q|bob|qoder"
+            exit 1
+    end
+end
+
+function update_all_existing_agents
+    set found_agent false
+    
+    # Check each possible agent file and update if it exists
+    if test -f "$CLAUDE_FILE"
+        update_agent_file "$CLAUDE_FILE" "Claude Code"
+        set found_agent true
+    end
+    
+    if test -f "$GEMINI_FILE"
+        update_agent_file "$GEMINI_FILE" "Gemini CLI"
+        set found_agent true
+    end
+    
+    if test -f "$COPILOT_FILE"
+        update_agent_file "$COPILOT_FILE" "GitHub Copilot"
+        set found_agent true
+    end
+    
+    if test -f "$CURSOR_FILE"
+        update_agent_file "$CURSOR_FILE" "Cursor IDE"
+        set found_agent true
+    end
+    
+    if test -f "$QWEN_FILE"
+        update_agent_file "$QWEN_FILE" "Qwen Code"
+        set found_agent true
+    end
+    
+    if test -f "$AGENTS_FILE"
+        update_agent_file "$AGENTS_FILE" "Codex/opencode"
+        set found_agent true
+    end
+    
+    if test -f "$WINDSURF_FILE"
+        update_agent_file "$WINDSURF_FILE" "Windsurf"
+        set found_agent true
+    end
+    
+    if test -f "$KILOCODE_FILE"
+        update_agent_file "$KILOCODE_FILE" "Kilo Code"
+        set found_agent true
+    end
+
+    if test -f "$AUGGIE_FILE"
+        update_agent_file "$AUGGIE_FILE" "Auggie CLI"
+        set found_agent true
+    end
+    
+    if test -f "$ROO_FILE"
+        update_agent_file "$ROO_FILE" "Roo Code"
+        set found_agent true
+    end
+
+    if test -f "$CODEBUDDY_FILE"
+        update_agent_file "$CODEBUDDY_FILE" "CodeBuddy CLI"
+        set found_agent true
+    end
+
+    if test -f "$SHAI_FILE"
+        update_agent_file "$SHAI_FILE" "SHAI"
+        set found_agent true
+    end
+
+    if test -f "$QODER_FILE"
+        update_agent_file "$QODER_FILE" "Qoder CLI"
+        set found_agent true
+    end
+
+    if test -f "$Q_FILE"
+        update_agent_file "$Q_FILE" "Amazon Q Developer CLI"
+        set found_agent true
+    end
+    
+    if test -f "$BOB_FILE"
+        update_agent_file "$BOB_FILE" "IBM Bob"
+        set found_agent true
+    end
+    
+    # If no agent files exist, create a default Claude file
+    if test "$found_agent" = "false"
+        log_info "No existing agent files found, creating default Claude file..."
+        update_agent_file "$CLAUDE_FILE" "Claude Code"
+    end
+end
+
+function print_summary
+    echo
+    log_info "Summary of changes:"
+    
+    if test -n "$NEW_LANG"
+        echo "  - Added language: $NEW_LANG"
+    end
+    
+    if test -n "$NEW_FRAMEWORK"
+        echo "  - Added framework: $NEW_FRAMEWORK"
+    end
+    
+    if test -n "$NEW_DB"; and test "$NEW_DB" != "N/A"
+        echo "  - Added database: $NEW_DB"
+    end
+    
+    echo
+
+    log_info "Usage: "(status --current-filename)" [claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|codebuddy|shai|q|bob|qoder]"
+end
+
+#==============================================================================
+# Main Execution
+#==============================================================================
+
+function main
+    # Validate environment before proceeding
+    validate_environment
+    
+    log_info "=== Updating agent context files for feature $CURRENT_BRANCH ==="
+    
+    # Parse the plan file to extract project information
+    if not parse_plan_data "$NEW_PLAN"
+        log_error "Failed to parse plan data"
+        exit 1
+    end
+    
+    # Process based on agent type argument
+    set success true
+    
+    if test -z "$AGENT_TYPE"
+        # No specific agent provided - update all existing agent files
+        log_info "No agent specified, updating all existing agent files..."
+        if not update_all_existing_agents
+            set success false
+        end
+    else
+        # Specific agent provided - update only that agent
+        log_info "Updating specific agent: $AGENT_TYPE"
+        if not update_specific_agent "$AGENT_TYPE"
+            set success false
+        end
+    end
+    
+    # Print summary
+    print_summary
+    
+    if test "$success" = "true"
+        log_success "Agent context update completed successfully"
+        exit 0
+    else
+        log_error "Agent context update completed with errors"
+        exit 1
+    end
+end
+
+# Execute main function
+main