mlparty 0.2.2

An agent-native platform for ML experiment tracking and lineage/knowledge.

Every existing tracker is human-dashboard-first: great at scalars-over-time, silent about why a run exists and how it relates to the others. ml-party treats a run's abstract, typed relationships, and reproducibility contract as first-class data — a durable, queryable lab notebook that agents write (over MCP) and query, and that humans read live (CLI + web viewer). It is also a full local tracker: metrics, artifacts, checkpoints, all stored locally; mirroring to W&B/MLflow is a future optional adapter, not the product.

Core ideas:

• The write contract is the product. run_start pre-registers intent (title, purpose, hypothesis, full parameters) and auto-captures the repro tuple (source snapshot, env lock, invocation, hardware, outer-git provenance). run_finalize refuses without method + result/verdict + reproduce — refusals are machine-readable {missing, invalid}. Failures are knowledge (run_fail); silent deaths become abandoned.
• Internal git per experiment. Every run snapshots the actually-running source (allowlisted, size-capped, secrets denied) as a commit in a bare internal repo. A run references a commit — a launch-arg sweep is many runs on one commit, distinguished by mandatory parameters. Declared derives_from lineage becomes the commit's parent; every run gets its own ref (no races).
• A knowledge graph over it. Typed nodes (project / experiment / run / note), a controlled edge vocabulary (derives-from, supersedes, refutes, …), hybrid BM25(+optional embeddings)+graph retrieval that downranks superseded/refuted beliefs. Knowledge is append-only; correction is an edge.
• Boards: agents author whole views. An agent logs a self-contained HTML page as an artifact and the UI renders it sandboxed — comparison dashboards, demo galleries, live reports that fetch current data from the read-only API at view time (boards guide).
• Run control through registered templates. Users register shell templates with typed placeholders — the allowlist; agents invoke them with validated, shell-quoted values (never commands), and every invocation is recorded in the graph, edged to the run it controlled. Restart is never a mutation: a new run, derives-from the old (run-control guide).
• Local-first, remote-ready. Writers always write a local spool store; spool-and-flush sync ships runs to a served store over three idempotent streams (remote-tracking guide). Multi-user auth (roles, per-user tokens, UI login) activates with the first mlp user add (deployment guide).

Quickstart

Requirements: Linux or macOS (Windows via WSL — the store relies on POSIX file locking) and Python ≥ 3.11. The web UI ships prebuilt in the wheel; nothing to compile.

pip install mlparty

mlp init --root .mlparty                    # create a store (+ MCP registration)
python -m mlparty.demo &                    # a real run: contract + live metrics
mlp ui                                      # → http://127.0.0.1:7327

Open the browser: the demo run is streaming its loss curve live. It went through the full lifecycle a real training does — pre-registered with purpose/hypothesis/parameters, source snapshotted, metrics streamed, then finalized with a verdict. Click into it: Overview | Metrics | Artifacts | Code.

Let an agent drive it

mlp init registered the MCP server in ./.mcp.json, so agents started in this project (Claude Code and compatible clients) pick it up automatically — approve it once when asked. The server is self-teaching: the full tracking workflow rides in its MCP instructions, so "use ml-party for this run" is all an agent needs to hear. Other setups: mlp connect registers an existing store into another project; mlp mcp-config prints the snippet for other MCP clients.

Instrument a training script

The agent brackets the run over MCP and launches your script with ML_PARTY_STORE/ML_PARTY_RUN set; the script attaches as the second writer:

import mlparty

h = mlparty.attach()                        # env-var handshake (inert without ML_PARTY_RUN)
h.log_metric("loss", loss, step=step)       # streams to the live view
h.log_artifact("ckpt/best.pt")
h.finalize(method=..., result={"summary": ..., "verdict": "confirmed",
                               "metrics": {"wer": 0.048}},
           reproduce="python train.py --lr 1e-3")
# unhandled exceptions auto-fail the run with the traceback

CLI mirror: mlp status / runs / show <ref> / tail <run> / query "…" / diff <a> <b> / janitor / rebuild-index.

Web viewer

mlp ui serves a read-only SPA: experiments → runs → tabbed run pages with live SSE metric dashboards, a finder-style artifact browser (image/audio/ video viewers, an .npy/.npz tensor slicer), agent-authored boards, the lineage graph, search, and diff. Remote box → tunnel like TensorBoard: ssh -L 7327:localhost:7327 <box>. For a shared server with logins and sync ingest, see the deployment guide and the remote-tracking guide.

From source

For development, or to run an unreleased revision — needs Node ≥ 20, since the UI bundle is built rather than downloaded:

git clone https://github.com/paul-krug/ml-party && cd ml-party
python -m venv .venv && .venv/bin/pip install -e .
(cd ui && npm install && npm run build)     # web UI bundle, once
.venv/bin/python -m pytest tests/ -q

Contributions: CONTRIBUTING.md for the flow and the maintainer-only paths, AGENTS.md for conventions, SECURITY.md for the trust model.

Design

• User guide (rendered from docs/): tracking runs, the web UI, boards, run control, MCP setup & tools, remote tracking, deployment & auth.
• DESIGN.md — the living design document (ontology, contract, internal-git model, storage, surfaces, remote mode, forward design).
• AGENTS.md — conventions for agents/contributors working in this repo (incl. the doc-sync rule). Planning lives in the repo's GitHub Project, not in tracked files.

Layering: pydantic ontology → journal-first store (journal.jsonl is the source of truth; SQLite/FTS5 is a rebuildable index) → dulwich internal-git engine → MlParty core API → thin frontends (MCP server, mlp CLI, in-process client, read-only HTTP+SSE for the viewer).

Status

Beta (0.x): APIs may still move between minor versions; the store format is journal-first and rebuildable, and every release migrates it forward. Licensed Apache-2.0.

Tests: .venv/bin/python -m pytest tests/ -q