Murlocs

Give every coding agent the right map—and prove the map is still current.

Murlocs turns your repository’s architecture and rules into layered AGENTS.md files, then checks that they stay in sync.

Your repository is a place. Agents need a map.

Useful context lives in source trees, old documents, CI recipes, review habits, and the people who remember why a boundary exists. A long prompt describes some of it once; it cannot reliably say what applies to this path, connect two areas, or prove the guidance matches its reviewed source.

Murlocs makes that knowledge local, versioned, and reviewable:

• one source of truth in .murlocs/manifest.toml, with optional owner-focused layers;
• familiar AGENTS.md maps at the root and where local rules differ;
• explicit invariants, proof references, cross-scope edges, and context budgets;
• checks for schema, ownership, drift, coverage, and declared evidence; and
• a safe path for repositories with existing guidance.

It is map infrastructure, not a hosted service or replacement for engineering judgment.

Start in a minute

Murlocs requires Python 3.14+. Milo powers its CLI, MCP, and agent discovery. Install:

python -m pip install -e .

murlocs init --name "My Repository"
# Describe the repository you actually have in .murlocs/manifest.toml.
murlocs compile
murlocs check

# Ask what applies before working in a path or reviewing a change.
murlocs explain src/my_package/feature.py
murlocs impact --path src/my_package/feature.py

mrr is the same CLI.

From generic instruction to a working map

The core loop

describe the repository  →  compile local maps  →  ask the map at work time  →  verify the map
       manifest/layers        AGENTS.md files        explain + impact            check

What Murlocs verifies—and what it does not

Murlocs checks its manifest and graph, proof links, map ownership, generated-file drift, budgets, and configured coverage. Command-backed invariants name registered checks; manual claims point to textual evidence.

It does not run registered commands during murlocs check, decide a change is correct, authenticate an actor, set merge policy, or turn an assertion into proof. A human or agent still runs repository checks. No coverage roots means coverage is unconfigured—not evaluated.

Use it when the codebase has more context than one prompt can hold

Murlocs fits when agents and contributors need to know:

• which rules apply to a directory;
• who owns a boundary;
• whether generated maps are current after a refactor; or
• how to add guidance without overwriting existing files.

For a tiny, stable project with one obvious convention, a concise hand-written AGENTS.md may be enough. Murlocs earns its place as scopes, owners, and durable claims grow.

Key workflows

Author a map that reflects the real repository

Start with a root map. Split only where ownership or rules need a local scope. One manifest is enough; base, domain, and overlay layers compose the same model. See layered authoring.

murlocs init --coverage-root src --coverage-root tests
murlocs add-scope src/my_package
murlocs compile
murlocs check

Coverage is opt-in. Initialization records only the roots you name; it never guesses them.

Understand a task before changing code

murlocs explain src/my_package/feature.py
murlocs impact --path src/my_package/feature.py --path docs/feature.md

explain returns the scope chain and its rules. impact shows what a changed path needs reviewed, without starting an agent or running repository commands. See changed-path impact.

Change safely and repair only ordinary drift

murlocs --dry-run compile
murlocs check
murlocs --dry-run repair
murlocs repair

compile renders managed maps and updates the lockfile. After a preflighted plan, repair writes only those maps and the lockfile. It refuses semantic findings, unmanaged output, and edited maps; those need owner or agent work.

Migrate deliberately; never silently take ownership

murlocs inventory
murlocs diff --mode semantic
murlocs import --from stewards --output .murlocs/manifest.toml
murlocs --dry-run adopt
murlocs adopt
murlocs prune

init never overwrites an existing AGENTS.md; import creates a candidate but never adopts it. adopt accepts only byte-current legacy-generated maps and saves exact backups; prune moves legacy tooling into that backup. rollback restores the pre-adoption network until maps are edited. User-owned files such as CLAUDE.md are inventoried, never changed. See primary user journeys.

Integrations that preserve the boundary

Murlocs keeps AGENTS.md files portable and local-first. murlocs --mcp offers nine read-only tools: version, inventory, status, diff, check, explain, impact, curate review, and curate check. Writes stay CLI-only. murlocs --llms-txt, JSON, and typed dispatch support discovery.

The GitHub Copilot and Claude Code adapters share the read-only lifecycle contract; the conformance harness tests it. Optional passive Git hooks run checks at commit and push, stay quiet when healthy, and do not replace existing managers or custom hook paths. See the activation lifecycle and outcome envelope for portable receipts; integration output never sets merge policy.

Runtime identity

murlocs version --format json reports a redacted build and installation identity for integrations. See runtime build identity for the contract and publisher boundary.

Find the right detail

Project status and development

Murlocs is an experimental v0.1 implementation. The manifest schema and generated format may change before the first stable release.

Development checks are intentionally separate from guidance verification:

ruff check .
pytest
milo verify src/murlocs/cli.py
murlocs check
murlocs impact --path README.md

The optional bootstrap-murlocs skill inventories a repository and drafts a truthful manifest without treating hand-authored guidance as safely importable.