MIMRY

Local repo memory for AI coding agents.

If MIMRY saves your agent tokens, please star it.

MIMRY is a command-line tool that tells AI coding agents which files, and which lines in them, to read for a task. It parses a repository into symbols and a dependency graph, keeps the index on your machine, and ranks the files that matter for a task described in plain words. Agents call it from the shell or through its MCP server.

Installation

uv tool install mimry

Requires Python 3.11 or newer on Windows, Linux or macOS. pipx install mimry and pip install mimry also work.

Quick start

Run mimry preflight in your repository with a task description. The first run builds the index.

mimry preflight "Fix session cookie not refreshed when SESSION_REFRESH_EACH_REQUEST is set"

Output on the Flask repository:

Start with
   1  src/flask/sessions.py
      name matches · path matches · connected to other matches
      read first: lines 202-206 (get_cookie_secure), 233-247 (should_set_cookie)
   2  src/flask/ctx.py
      name matches · connected to other matches
      read first: lines 154-206 (copy_current_request_context), 395-403 (session)
   3  src/flask/testing.py
      name matches · connected to other matches
      read first: lines 135-183 (session_transaction), 193-202 (_request_from_builder_args)

The same result is written to .mimry/mimry-out/context/latest.md as a context pack for the agent, with the matched symbols, related files and the project's test commands.

To have your agent use MIMRY on its own, install it for that agent:

mimry install --platform claude-code

Features

Supported agents

mimry install --platform <name> installs a skill that teaches the agent when to use MIMRY, and registers the MCP server where the agent supports it.

✅ means mimry install sets it up, manual means you add the MCP server by hand, and 🚧 means support is in progress.

See docs/agents.md for where each agent's files go and how its MCP server is registered.

claude mcp add --scope user mimry -- mimry-mcp   # Claude Code
codex mcp add mimry -- mimry-mcp                 # Codex

{
  "mcpServers": {
    "mimry": { "command": "mimry-mcp" }
  }
}

Usage

mimry preflight "<task>"            # list the files and lines to read first, and write a context pack
mimry find "<query>"                # rank files for a query
mimry symbol <name>                 # find where a function, class or heading is defined
mimry related "<query>"             # list files connected through imports and calls
mimry explain "<task>"              # show the key files and symbols, and how they connect
mimry why <file> --query "<task>"   # explain why a file ranked
mimry feedback ...                  # record which files helped
mimry status                        # check whether the index is current
mimry doctor                        # diagnose the install and the index

See docs/commands.md for every command and option.

Configuration

A mimry.toml at the repository root controls which files are indexed. Commit it so everyone on the team gets the same index.

[index]
include = ["src/**", "docs/**"]            # index only these paths
exclude = ["**/fixtures/**", "legacy/**"]  # never index these paths
max_file_bytes = 2_000_000                 # size limit per file (default 1 MB)

[index.languages]
".inc" = "php"                             # parse .inc files as PHP
".h" = "cpp"                               # parse .h headers as C++ instead of C

Benchmarks

Tokens an agent read before it found the code each pull request changed, measured on 92 merged pull requests from 12 open-source projects.

See benchmarks/tokens for the method, per-project results and how to reproduce them.

How it works

1. Index. MIMRY parses each file into symbols and edges for imports, calls and inheritance, and stores the index in your user cache directory, outside the repository.
2. Rank. MIMRY matches a task against file names, paths, content, symbols and the graph, and drops imports it cannot resolve rather than guessing.
3. Refresh. Like Git, MIMRY compares file metadata and re-reads only the files that changed.

See docs/how-it-works.md for details.

Privacy

Indexing and search run locally. Credential files are skipped, secret-looking values are redacted from feedback, and untracked files named in .gitignore are not indexed.

Contributing

Bug reports and pull requests are welcome. See CONTRIBUTING.md for setup and checks. MIMRY is in public alpha, and its interfaces may change before 1.0.

License

MIT