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trace-mcp Codemod Workflow

Forces Claude to use trace-mcp's apply_codemod for any edit pattern repeated 2+ times instead of firing off repetitive Edit calls.

Dev & CodingIntermediate★ 140⑂ 19AI score 8/10Last updated: Sep 5, 2026

What it does

  • Detects when the same kind of change is needed 2 or more times (one file or many) and routes it through trace-mcp's apply_codemod regex bulk replace instead of repeated Edit calls.
  • Enforces a standard loop: ① preview with dry_run → ② narrow scope via filter_content / multiline → ③ apply with dry_run: false (add confirm_large: true above 20 files) → ④ verify with the test suite or check_quality_gates at scope: "changed".
  • For cross-package or version-aware work (dependency upgrades), it starts with plan_batch_change to get an impact report before rewriting.
  • Calls out anti-patterns: using Edit replace_all for renames (use apply_rename), skipping dry-run, forgetting confirm_large.

Who it's for

  • Developers already running the trace-mcp MCP server.
  • Teams doing frequent refactors, signature changes, or API migrations in large TypeScript/Python codebases.
  • Anyone tired of Claude burning tokens on dozens of near-identical Edit calls.

Examples

  1. Signature change: rewrite extractNodes( to extractNodes(ctx, across src/**/*.ts, limited by filter_content to files that import it.
  2. Async migration: enable multiline to match function foo(...) { blocks and convert them to async function.
  3. Dependency upgrade: run plan_batch_change for lodash 4→5 to map affected files, then codemod the deprecated API calls.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/nikolai-vysotskyi/trace-mcp/HEAD/skills/trace-mcp-codemod/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/trace-mcp-codemod folder from the GitHub repo nikolai-vysotskyi/trace-mcp into my ~/.claude/skills/trace-mcp-codemod/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/nikolai-vysotskyi/trace-mcp.git /tmp/trace-mcp && mkdir -p ~/.claude/skills && cp -r /tmp/trace-mcp/skills/trace-mcp-codemod ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. First connect the trace-mcp MCP server to Claude Code — this skill only works if tools like apply_codemod and plan_batch_change are available (see the repo README for MCP setup).
  2. Clone the repository: git clone https://github.com/nikolai-vysotskyi/trace-mcp.git
  3. Create the skills directory: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r trace-mcp/skills/trace-mcp-codemod ~/.claude/skills/
  5. Restart Claude Code and confirm trace-mcp-codemod appears in your skills list.
  6. Test it with a request like "replace every oldFunction call with newFunction across the project" and always inspect the dry-run preview before applying.
View source on GitHub ↗License: MIT