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Plumb MCP Server

LSP-backed IDE intelligence plus concurrency-safe, transactional edits for AI coding agents.

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

Status

Pod has not dialled Plumb 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.

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Known issues

10 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 7.

Most discussed

Validate the remaining experimental LSP adapter (kotlin) against a real Gradle/Maven project

Three LSP adapters are still marked experimental (doc.go + the adapter status table in AGENTS.md): zls (Zig), kotlin-language-server, and vscode-html-language-server. They have mock-transport unit tests and gated (//go:build integration) real-binary tests, but the diagnostics round-trip hasn't been confirmed against a real server.

Why now: #1 found that the real reason typescript-language-server published no diagnostics was a missing textDocument.publishDiagnostics

Read the thread · 2026-06-16 · closed · 2 comments

Initialize _meta pinned-workspace is honoured as a session_start declaration without authenticating the sender

Summary

The serve-proxy replay channel is honoured as a session_start declaration without authenticating its sender: an MCP client initialising a connection can ship _meta["dev.plumbkit/pinned-workspace"], and rung 1 replays it with PinSourceSessionStart — the origin that outranks client roots, defeats the sticky-pin guard's steal refusal, and (since #306's containment guard) is the ONLY origin allowed to pin a home directory or a container of one.

Read the thread · 2026-08-14 · closed · 1 comment

Workspace pin is per-connection, but a client may multiplex many agent sessions over one plumb serve

Symptom

A field report (Cowork / Claude Desktop local-agent-mode, several concurrent sessions on the daemon) describes a connection pinned to ism-app silently drifting, mid-session and with no session_start in between, to two unrelated projects — first cvex, then muster.

find_files(pattern="ism-viewer.html")  -> No files found   (read fine minutes earlier)
read_file("ism-viewer.html")           -> stat .../gitlab/cvex/ism-viewer.html: no such file
session_start(workspace=ism

[Read the thread](https://github.com/plumbkit/plumb/issues/182) · 2026-07-10 · closed · 1 comment

### feat: move_symbol — relocate a declaration between files

## Use case

Architectural refactors frequently **move a declaration from one file to another** — e.g. extract `AgentStore` out of an `AppModel`, or relocate a method/func/type from `A.go` to `B.go` while decoupling packages. plumb has no first-class tool for this.

Today an agent has to compose it by hand:

1. `read_symbol` (or `replace_symbol_body` dry-run) to get the source,
2. `insert_after_symbol` at the destination,
3. `safe_delete_symbol` at the source,

with **no import/reference fix-up*

[Read the thread](https://github.com/plumbkit/plumb/issues/27) · 2026-06-17 · closed · 1 comment

### collab: on-demand knowledge handoff — share_findings on the episodic pipeline

## Motivation

Phase 3 of the config-gated `[collab]` cross-agent sharing capability (phases 1–2: #150, #151).

Plumb's episodic-memory pipeline (summarise → redaction scrub → provenance stamp → markdown memory under `.plumb/memories/` → FTS indexing → `generated_memory_keep` retention) currently fires only when a session goes **idle**. That makes knowledge handoff between agents post-hoc and lossy: an agent that just spent an hour mapping a subsystem has no way to hand those findings to a peer 

[Read the thread](https://github.com/plumbkit/plumb/issues/152) · 2026-07-04 · closed · 0 comments

### Most recent

### Help wanted: test & help port plumb on Windows

plumb has only been validated on macOS and Linux. **Windows is not supported yet** — and we'd love help from someone who runs Windows to (a) confirm exactly where it breaks today and (b) chip away at the port. This is a great issue if you're comfortable with Go on Windows.

## Heads-up: the daemon will not start on Windows today

Two core pieces are POSIX-only:

- **The MCP wire is a Unix domain socket** — `net.Listen("unix", …)` in `internal/cli/daemon.go` (both `plumb.sock` and the `plumb.ctrl

[Read the thread](https://github.com/plumbkit/plumb/issues/8) · 2026-06-16 · open · 0 comments

### plumb setup cursor and plumb setup augment are unverified end-to-end

Of the CLI clients `plumb setup` targets, **cursor-agent** and **auggie** are validated only at the unit level (the written config shape, `internal/cli/setup_clients_test.go`) — not end-to-end. Neither the auth-free connection tier nor the auth tier of the `cmd/clientsmoke` harness drives a real plumb tool call through them:

- **cursor-agent** caches MCP tool lists cloud-side and returns them without spawning `plumb serve`, so no auth-free probe provably reaches a fresh plumb; needs `CURSOR_API

[Read the thread](https://github.com/plumbkit/plumb/issues/4) · 2026-06-15 · open · outside contributor · 0 comments

[See all 10 reports Pod holds for Plumb](/mcp/plumb/issues).

## Firsthand observations

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## For agents

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