Cosmos SDK Migration Server

An MCP (Model Context Protocol) server for migrating Cosmos SDK chains from v0.50+ to v0.54.

This repository packages the migration server, the YAML migration specs, the orchestration guide, and the bundled upgrade-doc resources it exposes over MCP.

Install

pip install cosmos-migration-mcp

Or for local development:

git clone https://github.com/cosmos/cosmos-sdk-migration-mcp.git
cd cosmos-sdk-migration-mcp
pip install -e .

Run

The package exposes a cosmos-migration-mcp console script:

cosmos-migration-mcp

You can also run it as a module:

python -m cosmos_migration_mcp

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "cosmos-migration": {
      "command": "cosmos-migration-mcp"
    }
  }
}

Claude Code

claude mcp add cosmos-migration -- cosmos-migration-mcp

Reference

• Canonical Cosmos SDK Upgrade Guide — The official upstream source for breaking changes and migration instructions for all Cosmos SDK versions.

This MCP server bundles snapshots of the v0.54 upgrade documentation and migration specs. Always consult the canonical upstream guide for the latest information and breaking changes.

Tools

Tool	Description
scan_chain_tool	Detect SDK version and which specs apply to a chain
get_migration_plan	Preview all changes without modifying files
apply_spec	Apply a single spec, including go.mod edits, arg rewrites, and special cases
verify_spec_tool	Run verification checks for one spec
verify_all_specs	Run verification for an explicit spec list or for currently detectable specs
verify_build	Run go build ./... and return structured results
run_go_mod_tidy	Run go mod tidy and return structured results
run_tests	Run go test ./... and return structured results
show_diff	Show git diff of changes in the chain directory
list_specs	List all available migration specs
get_spec	Get full content of a specific spec
check_warnings	Check for fatal blocks and warnings

Resources

URI	Description
specs://v50-to-v54/{id}	Read a spec as YAML text
specs://v50-to-v54/index	List all specs with metadata
agents://orchestration	Read the bundled orchestration guide
docs://upgrading/v0.54	Read the bundled v0.54 upgrade guide
docs://upgrade-checklist/v0.54	Read the bundled upgrade checklist section
docs://changelog/v0.54-breaking	Read the bundled v0.54 breaking changes section
docs://release-notes/v0.54	Read the bundled v0.54 release notes

Prompts

Prompt	Description
migrate_chain	Full workflow: scan → plan → apply → verify → report
assess_chain	Scan-only: detect version, estimate effort, no changes
debug_build_failure	Diagnose post-migration build errors