# mlua-swarm MCP Server

MCP server for mlua-swarm: engine that compiles flow.ir Blueprints and dispatches agent steps.

**Publisher claimed.** No tool list reported, and Pod has not connected to this server.

## Status

Pod has not dialled mlua-swarm yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

## Connect

Published as `ghcr.io/ynishi/mse:0.27.0` on oci. Runs locally.

## Known issues

**22 problems reported by people outside the maintainer team.** Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 12.

### Most discussed

### [Refactor] ID lifecycle audit — canonicalize run_id / task_id / worker_handle / sid / req_id / capability_token and fix six drift observations

# [Refactor] ID lifecycle audit — canonicalize `run_id` / `task_id` / `worker_handle` / `sid` / `req_id` / `capability_token` and fix six drift observations

## Summary

Several distinct identifiers flow through the swarm run pipeline —
`run_id`, `TaskId`, `SessionId`, `WorkerId`, `worker_handle`, the
operator session `sid`, `req_id`, and the embedded `capability_token`.
A short `grep`-based audit surfaces six concrete drift observations,
and the operator-facing mental model (task_id stable acro

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/11) · 2026-07-06 · closed · 3 comments

### [Enhancement] Bump agent-block to 0.33.0 — HTTPS MCP endpoints need the TLS-enabled mcp.connect_http (raises MSRV to 1.88)

## What

Bump `agent-block-core` / `agent-block-types` from `0.31.0` to `0.33.0` in
`[workspace.dependencies]`.

## Why

`mse` reaches an MCP endpoint through agent-block's `mcp.connect_http`. Up to
agent-block 0.31.0 that Streamable HTTP transport was built **without a TLS
backend**, so any `https://` endpoint failed at connect with:

```
ConnectError("invalid URL, scheme is not http")
```

agent-block 0.32.0 fixed it: the `mcp-http` feature now enables rmcp's
`reqwest-tls-no-provider` (rustls 

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/99) · 2026-08-27 · closed · 1 comment

### LaunchAgent should not chdir into a source checkout

## Problem

The bootstrapped LaunchAgent sets `WorkingDirectory` to a source
checkout of this repository. That couples the daemon's ability to start
to the presence of a developer checkout it does not otherwise need at
runtime: the config lives under `~/.mse/`, and `blueprint_ref_base` is
an absolute path pointing outside the checkout.

Move, rename or delete that checkout and `mse serve` becomes
permanently unstartable.

## What it looks like when it happens

`mse serve` exits with **78 (`EX_CO

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/97) · 2026-08-13 · closed · 1 comment

### [Enhancement] Add `mse server` subcommand family for launchd lifecycle management (MCP recovery path completeness)

# [Enhancement] Add `mse server` subcommand family for launchd lifecycle management (MCP recovery path completeness)

## Summary

`mse` binary currently has no first-class subcommand for managing its own server lifecycle (install / bootstrap / bootout / restart under launchd). The install path lives in `scripts/launchd/install.sh`, and mse-mcp is a thin wrapper over binary subcommands, so operations that exist only in the shell script are not reachable through MCP tools.

This creates a recovery

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/69) · 2026-07-19 · closed · 1 comment

### [Enhancement] bp_dsl authoring DX: scaffolding CLI/MCP (`mse bp new`) + lint auto-recovery with concrete fix hints

# [Enhancement] bp_dsl authoring DX: scaffolding CLI/MCP (`mse bp new`) + lint auto-recovery with concrete fix hints

## Summary

Sibling issues (`[Bug] halted_at missing` and `[Enhancement] worker_binding compile-lint`) surface a shared root: authors writing `.bp.lua` from scratch hit compile-lint failures whose fix is mechanical, but the current authoring loop has neither a preventive layer (start from a template that already sets the required fields) nor a curative layer (lint tells you the e

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/62) · 2026-07-17 · closed · 1 comment

### Most recent

### [Enhancement] Task resume — fix & re-execute a failed step (and its downstream) without replaying the whole flow

# [Enhancement] Task resume — fix & re-execute a failed step (and its downstream) without replaying the whole flow

## Summary

The core ask: when a Blueprint run stops (or one step returns a failing
verdict) mid-flow, let the user **fix the Blueprint / agent definition and
resume the task from that step**, without replaying every unchanged upstream
step from scratch.

Fix-then-resume is the normal iterate loop. Between the stop and the resume,
the natural expectation is that the Blueprint itsel

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/71) · 2026-07-19 · open · 0 comments

### [Bug] swarm_status MCP tool returns stale 'running' for completed detach runs

# [Bug] `swarm_status` MCP tool returns stale `running` for completed detach runs

## Summary

After a `detach: true` run completes end-to-end (all spawn frames acknowledged, server writes final `result_ref` and marks the run `done` in the SQLite `RunStore`), calling `mcp__mse__swarm_status(run_id)` still returns `{status: "running"}`. Meanwhile a direct `GET /v1/runs/:id` against the same server returns `status: "done"` with a full `step_entries` list and `result_ref` populated.

The MCP tool r

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/67) · 2026-07-18 · closed · 0 comments

### [Bug] mse bp new pipeline scaffold does not surface init_ctx seeding, causing silent launch failure

# [Bug] `mse bp new pipeline` scaffold does not surface `init_ctx` seeding, causing silent launch failure

## Summary

Blueprints generated by `mse bp new pipeline` pass `mse bp build` compile-lint successfully, but the first `swarm_run` against them fails at flow evaluation with `launch: flow eval: path not found: $.d.<first-stage>`. In detach mode, the run silently stays in `running` state, the joined operator's `pending_wait` never receives a spawn frame, and no obvious error surfaces to the 

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/64) · 2026-07-18 · closed · 0 comments

### feat: file-path upload for worker_submit (@file: sentinel)

## Motivation

Some workers produce large response bodies (multi-KB structured output) and submit them inline via `mcp__mse__mse_worker_submit`. Two problems appear:

1. **Duplicate emission cost**: LLM-driven workers frequently "rehearse" a large response body as an inline text stream before calling the submit tool, then submit the same body again as the tool argument. This effectively doubles output tokens for kilobyte-scale payloads.
2. **Reliability**: Inline body emission couples response q

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/42) · 2026-07-11 · closed · 0 comments

### [Enhancement] Detach the flow-eval driver from the sync launch request (async launch + explicit await)

# [Enhancement] Detach the flow-eval driver from the sync launch request (async launch + explicit await)

## Summary

Today, `POST /v1/tasks` (and the MCP `swarm_run` tool that proxies to it) is a synchronous launch: the HTTP handler drives the in-process flow eval **inline inside its own request future**, wrapped in `tokio::time::timeout(sync_timeout_secs, ...)`. This was an intentional v1 semantic (fail-loud sync launch, see the Guard 2 work): on ceiling expiry the timed-out future is dropped,

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/37) · 2026-07-10 · closed · 1 comment

### [Feature] Structured worker degradation reporting — persist tool failures / fallbacks on the Run record instead of losing them to silent workarounds

# [Feature] Structured worker degradation reporting — persist tool failures / fallbacks on the Run record instead of losing them to silent workarounds

## Summary

LLM workers that hit a tool failure mid-task tend to work around it silently: they fall back to an alternative tool or a weaker method and still submit a plausible-looking result. The engine currently has no channel for this — `mse_worker_submit` / `POST /v1/worker/submit` carries only the result body, so a degraded run and a clean ru

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/32) · 2026-07-09 · closed · 0 comments

### [Feature] Ship a Claude Code plugin bundle (plugins/mse): Blueprint-authoring DX agents + skills

# [Feature] Ship a Claude Code plugin bundle (`plugins/mse`): Blueprint-authoring DX agents + skills

## Summary

Blueprint authoring is the hardest part of adopting mlua-swarm: Flow IR node/expr ops, worker binding, projection placement, and context-supply tiers all have to line up before a Blueprint runs. The building blocks for guided authoring already exist — `mse://api/blueprint-schema`, bundled samples, the agent-md authoring guide (#28), and the `bp_doctor` MCP tool (v0.8.0) — but they ar

[Read the thread](https://github.com/ynishi/mlua-swarm/issues/30) · 2026-07-09 · closed · 1 comment

[See all 17 reports Pod holds for mlua-swarm](/mcp/mlua-swarm/issues) — of 22 qualified upstream.

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