— name: morph-apply description: Fast file editing via Morph Apply API (10,500 tokens/sec, 98% accuracy) allowed-tools: [Bash, Read] — # Morph Fast Apply Fast, AI-powered file editing using the Morph Apply API. Edit files without reading them first. Processes at 10,500 tokens/sec with 98% accuracy. ## When to Use – Fast file edits without reading entire file first – Batch edits to a file (multiple changes in one operation) – When you know what to change but file is large – Large files where reading would consume too many tokens ## Key Pattern: Code Markers Use `// … existing code …` (or language-appropriate comments) to mark where edits go: “`python # … existing code … try: result = process() except Exception as e: log.error(e) # … existing code … “` The API intelligently places your edit in the right location. ## Usage ### Add error handling “`bash uv run python -m runtime.harness scripts/morph_apply.py \ –file "src/auth.py" \ –instruction "Add error handling to login function" \ –code_edit "# … existing code … try: user = authenticate(credentials) except AuthError as e: log.error(f'Auth failed: {e}') raise # … existing code …" “` ### Add logging “`bash uv run python -m runtime.harness scripts/morph_apply.py \ –file "src/api.py" \ –instruction "Add debug logging" \ –code_edit "# … existing code … logger.debug(f'Processing request: {request.id}') # … existing code …" “` ### TypeScript example “`bash uv run python -m runtime.harness scripts/morph_apply.py \ –file "src/types.ts" \ –instruction "Add user validation" \ –code_edit "// … existing code … if (!user) throw new Error('User not found'); if (!user.isActive) throw new Error('User inactive'); // … existing code …" “` ## Parameters | Parameter | Description | |———–|————-| | `–file` | File path to edit (required) | | `–instruction` | Human description of the change (required) | | `–code_edit` | Code snippet with markers showing where to place edit (required) | ## vs Claude's Edit Tool | Tool | Best For | |——|———-| | **morph-apply** | Fast edits, don't need to read file first, large files, batch edits | | **Claude Edit** | Small precise edits when file is already in context | **Use morph-apply when:** – File is not in context and reading it would be expensive – File is very large (>500 lines) – Making multiple related edits at once – You know the context of the change (function name, class, etc.) **Use Claude Edit when:** – File is already in context from prior Read – Very precise edits requiring exact old/new string matching – Small files (<200 lines) ## MCP Server Required Requires `morph` server in mcp_config.json with `MORPH_API_KEY`. ## Performance – **Speed**: 10,500 tokens/sec – **Accuracy**: 98% correct placement – **Token savings**: Don't need to read entire file first