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workflows-mcp-server MCP Server

Store, query, and create YAML workflow playbooks for LLM agents.

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

Status

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Connect

Published as @cyanheads/workflows-mcp-server on npm. Runs locally.

Known issues

19 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

docs(readme): document versioned workflow filenames

Use case

The README's workflow_create section describes the permanent workflow path without the version segment, but the implementation writes versioned filenames so multiple versions can coexist. The docs should match the current storage behavior.

Proposed behavior

Update the README bullet under workflow_create from:

categories/<slugified-category>/<slugified-name>-workflow.yaml

to the actual shape:

categories/<slugified-category>/<slugified-name>-<slugifie

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/14) · 2026-07-01 · closed · 1 comment

### feat(tool-defs): tighten client-facing workflow descriptions and empty-list context

The current tool catalog works, but several descriptions expose implementation details or coach the reader instead of describing the API surface. Tightening these strings would make `tools/list` easier for clients to use and reduce accidental coupling to local file layout.

## Proposal

Revise the tool descriptions, parameter descriptions, output descriptions, and empty-result text to be behavior-oriented and client-facing. Keep details that directly affect caller behavior, but avoid implementat

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/13) · 2026-07-01 · closed · 1 comment

### bug(seed): bundled research visualization workflow is missing category metadata

### Server version

0.1.2

### mcp-ts-core version

0.10.6

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

stdio

### OS

macOS 26.1

### Description

The bundled permanent workflow at `workflows-yaml/categories/research-visualization/pubmed-research-with-cosmograph-visualization-workflow.yaml` has no `category:` field. Startup logs a warning for it, and category-filtered `workflow_list` calls cannot match it by category even though it lives under a category directory.

### St

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/12) · 2026-07-01 · closed · 1 comment

### bug(config): missing WORKFLOWS_DIR leaves watcher and snapshot disabled

### Server version

0.1.2

### mcp-ts-core version

0.10.6

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

HTTP (Streamable HTTP)

### OS

macOS 26.1

### Description

When `WORKFLOWS_DIR` points at a directory that does not exist yet, startup continues and the server reports ready, but the filesystem watcher exits immediately and `_index.json` cannot be written. This can happen on first-run installs where users have not created the workflow root before starting the server.

#

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/11) · 2026-07-01 · closed · 1 comment

### bug(workflow_create): categories that slugify empty write into categories root

### Server version

0.1.2

### mcp-ts-core version

0.10.6

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

HTTP (Streamable HTTP)

### OS

macOS 26.1

### Description

`workflow_create` rejects whitespace-only categories, but it does not reject categories that contain no slug-safe characters. A category like `!!!` passes validation, slugifies to an empty string, and writes the workflow directly under `categories/` rather than under a category directory.

### Steps to reproduce

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/10) · 2026-07-01 · closed · 1 comment

### Most recent

### feat(config): default MCP_SESSION_MODE to stateless across env, Docker, and src

`Dockerfile` sets `ENV MCP_SESSION_MODE="stateless"`, but `.env.example` sets `MCP_SESSION_MODE=auto` (uncommented). The container and the same code run via `bunx`, `npm start`, or from source therefore resolve to different session modes — stateless in Docker, stateful everywhere else, since the framework schema defaults to `auto` and `auto` resolves to `stateful`.

Related: cyanheads/mcp-ts-core#376

## Proposal

Make stateless this server's single, explicit default across every surface, so the

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/23) · 2026-08-22 · open · 0 comments

### bug(index): temporary entries shadow permanent workflows with the same key

### Server version

0.2.0

### mcp-ts-core version

0.10.10

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

A temporary and permanent workflow can share the same `name@version`. The rebuild scans permanent files first and temporary files second into one `Map`, so the temporary entry replaces the permanent entry. The permanent file remains on disk but disappears from `workflow_list`, `workflow_get` returns the temp copy, and `workflow_de

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/19) · 2026-07-16 · open · 0 comments

### bug(validation): create tools accept whitespace-only workflow content

### Server version

0.2.0

### mcp-ts-core version

0.10.10

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

`workflow_create`, `workflow_create_temp`, and the index schema use `z.string().min(1)` for several meaningful fields. Whitespace-only descriptions, authors, step server names, and step tool names therefore pass validation, are written to disk, and remain indexed. The permanent tool already applies a semantic whitespace check to `

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/22) · 2026-07-16 · open · 0 comments

### bug(temp): temporary workflows persist across sessions with no expiry path

### Server version

0.2.0

### mcp-ts-core version

0.10.10

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

The public surface describes temporary workflows as session-scoped, short-lived, and self-expiring, but `workflow_create_temp` writes ordinary YAML files and startup re-indexes every file under `temp/`. There is no expiry metadata, cleanup, or delete path, so temporary workflows persist indefinitely while `workflow_delete` refuses

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/18) · 2026-07-16 · open · 0 comments

### feat(workflow_create_temp): report overwrite outcomes with output-path parity

### Server version

0.2.0

### mcp-ts-core version

0.10.10

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Use case

`workflow_create_temp` documents overwrite semantics, but every call returns `status: "created"` even when it replaced an existing draft. Its `content[]` output also adds a temporary-workflow notice that is absent from `structuredContent`, so clients consuming the two MCP result paths do not receive the same complete result context.

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/20) · 2026-07-16 · open · 0 comments

### bug(storage): slug-derived filenames collide for distinct workflow keys

### Server version

0.2.0

### mcp-ts-core version

0.10.10

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

Workflow identity is `name@version`, but file identity is built from lossy slugs of both fields. Distinct valid keys can therefore map to one path. Permanent creation misreports the second distinct key as already existing; temporary creation silently overwrites the first file and removes that version from the index.

Related: #7, 

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/21) · 2026-07-16 · open · 0 comments

### feat(workflow_delete): require explicit confirmation for destructive deletes

### Use case

`workflow_delete` is marked `destructiveHint: true`, but the handler deletes immediately without an elicitation/confirmation step. A call that omits `version` also deletes the highest available version immediately, which is documented behavior from #5 but still a high-blast-radius default for an irreversible operation. A confirmation gate protects any client (or agent-driven call) from an accidental or under-specified delete before the file is unlinked.

Related: #5

## Proposal

A

[Read the thread](https://github.com/cyanheads/workflows-mcp-server/issues/17) · 2026-07-03 · open · 0 comments

[See all 17 reports Pod holds for workflows-mcp-server](/mcp/workflows-mcp-server/issues) — of 19 qualified upstream.

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