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Reported issues for Huly MCP

Pod holds 15 of 15 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded entirely — a maintainer's release checklist is not a warning to a prospective user.

Back to Huly MCP.

Most discussed

list_comments crashes with 'Connection error' when issue has MarkupContent-object comments

Bug

list_comments returns Connection error while communicating with Huly when an issue has comments whose message field is a MarkupContent object (rather than a ProseMirror JSON string).

Root cause

optionalMarkupToMarkdown (in dist/index.cjs) assumes markup is always a string:

function optionalMarkupToMarkdown(markup, urls, fallback = "") {
  return markup === null || markup === void 0 ? fallback : markupToMarkdownString(markup, urls);
}

`markupToMarkdownStrin

Read the thread · 2026-08-27 · closed · external user · 3 comments

update_issue: raw markdown breaks Huly issue description editor

Problem

Same root cause as #79. When editing issues via update_issue, Huly browse URLs in markdown descriptions get converted to internal reference nodes instead of staying as normal markdown links.

Symptoms

  1. Markdown hyperlinks [text](huly-url) appear as plain text or get stripped in the Huly UI
  2. Content appears mangled after edit even though it's stored correctly in the DB

Root Cause

Same as PR [#82](https://githu

Read the thread · 2026-06-28 · closed · external user · 2 comments

create_card cannot create cards of derived (child) master tags — only top-level types

Summary

create_card rejects any master tag that is a derived type (a child extending another master tag), even though such cards can be created normally in the Huly UI and the type is a fully registered workspace class. Only top-level master tags are accepted.

Environment

Read the thread · 2026-06-07 · closed · external user · 2 comments

edit_document and create_document: raw markdown breaks Huly collaborative editor

Problem

When creating or editing documents via MCP, the content is written as raw markdown to the database. Huly's UI reads documents from a collaborative document (via the collaborator service) using ProseMirror JSON format. Without calling uploadMarkup through the collaborator service, the collaborative document is never properly initialized.

This mirrors the milestone issue (#17) which was fixed in PR #18 for milestones, but documents haven't received the same treatment.

S

Read the thread · 2026-06-03 · closed · external user · 8 comments

Anthropic API rejects 24 tools: input_schema uses anyOf/oneOf/allOf at the root

Summary

When @firfi/huly-mcp is used with any Anthropic Claude client that sends all MCP tools in a single Messages API request (e.g. claude.ai web, claude.ai desktop), the request fails with:

API Error: 400 tools.N.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level

The Anthropic API requires input_schema to have type: "object" at the root. Composition keywords (oneOf / allOf / anyOf) are allowed inside properties, but not at the

Read the thread · 2026-05-26 · closed · external user · 2 comments

create_issue_status: 'findAll failed: Cannot read properties of null' on every call (self-hosted v0.7.353)

What

Every create_issue_status call against my self-hosted Huly v0.7.353 fails with the same null-deref. Read-side tools (get_project_type, list_statuses, etc.) work fine on the same project type — only the write path crashes.

Repro

Three argument shapes, all reliable failures:

// 1. Display names
{ "name": "Coming Next", "category": "backlog",
  "projectType": "Tracker Project", "taskType": "Status" }

// 2. IDs
{ "name": "Coming Next", "category": "backlog",
  "project

[Read the thread](https://github.com/dearlordylord/huly-mcp/issues/34) · 2026-04-30 · closed · outside contributor · 2 comments

### 0.6.0 dist bundle has VERSION hardcoded as 0.5.4

## Description

The `get_version` tool reports `0.5.4` even after updating to `0.6.0` via npm. The `package.json` correctly says `0.6.0`, but the built dist has the old version baked in.

**`dist/index.cjs` line 171239:**
```js
var VERSION = true ? "0.5.4" : "0.0.0-dev";

Root cause

changeset publish (used by the local-release script) skips npm lifecycle scripts, so the prepublishOnly hook never runs. That means pnpm build and pnpm verify-version are skipped, and the stale dist

Read the thread · 2026-04-11 · closed · outside contributor · 1 comment

[Bug]: npx execution fails with EUNSUPPORTEDPROTOCOL due to unresolved workspace: dependencies

Description

When attempting to run the package via npx, the execution immediately fails because npm encounters an unresolved workspace: protocol in the dependency tree.

It appears that @firfi/huly-mcp (or its @hcengineering/* dependencies) was published to the public npm registry without replacing the monorepo workspace: protocols with actual semantic version numbers in the published package.json.

Steps to Reproduce

Run the following command in any standard npm environment:

Read the thread · 2026-03-27 · closed · external user · 5 comments

Most recent

Expose canonical workbench URL on organization and person responses

Summary

Document responses include a url field pointing at the workbench (/document/<slug>-<id>), which makes it trivial for an MCP client to drop a clickable link into a channel message or another doc. Organization and person responses do not include this field, so the client has to either guess the URL pattern or fall back to plain text.

Affected tools

(also any other contact-shaped responses where the entity has a stab

Read the thread · 2026-05-08 · closed · outside contributor · 0 comments

create_event always assigns wrong calendar: getDefaultCalendar uses findOne({}) with no filter

Description

create_event (and create_recurring_event) always assign events to the wrong calendar when a workspace has more than one calendar object.

Root cause

In src/huly/operations/calendar-shared.ts, the function getDefaultCalendar is:

const getDefaultCalendar = (client) => client.findOne(
  calendar.class.Calendar,
  {}  // no filter — takes the first calendar returned by the DB
);

This picks whichever calendar the database returns first, which in practice is th

Read the thread · 2026-05-06 · closed · external user · 1 comment

Milestone descriptions empty in Huly UI — missing uploadMarkup for collaborative document

Problem

Milestone descriptions created or updated via MCP are not rendered in the Huly UI. The description field appears empty ("Add description...") even though the data is correctly stored in the database.

Root cause

The Huly UI reads milestone descriptions from a collaborative document (via the collaborator service), not from the raw Markup field stored in the database.

The Markup ↔ markdown conversion was added in 21fa94e, but createDoc/updateDoc only set the raw `Mark

Read the thread · 2026-04-05 · closed · outside contributor · 0 comments

Comments and component descriptions bypass Markup conversion — markdown not rendered

Problem

Comment operations (addComment, updateComment) and component description operations (createComponent, updateComponent) store the body/description as a raw text string in the message/description field, bypassing ProseMirror Markup conversion. This causes markdown formatting (## headings, **bold**, `code`, lists, tables, etc.) to render as plain text in the Huly UI.

Issue descriptions work correctly because they use uploadMarkup(...) with format `"markdown"

Read the thread · 2026-04-05 · closed · outside contributor · 0 comments

feat: add dueDate and estimation fields to create/update issue

Description

Currently, create_issue and update_issue MCP tools do not support setting due dates or time estimations. These fields exist in Huly's data model (IssueData.dueDate, IssueData.estimation) but are hardcoded to null and 0 respectively.

Requested Change

Expose the following optional parameters in both CreateIssueParams and UpdateIssueParams schemas:

Read the thread · 2026-03-30 · closed · outside contributor · 0 comments

Move bundled dependencies to devDependencies to fix npx installation

Problem

The project bundles all source code into dist/index.cjs via esbuild with only ws as an external dependency. However, all packages (@hcengineering/*, effect, @effect/*, @modelcontextprotocol/sdk, posthog-node, etc.) are listed under dependencies instead of devDependencies.

This means that when end users run npx -y @firfi/huly-mcp@latest, npm/pnpm attempts to install the full dependency tree — including @hcengineering/* packages whose latest versions (0.7.382)

Read the thread · 2026-03-30 · closed · outside contributor · 0 comments

Claude Code MCP setup: special characters in password + self-hosted troubleshooting

Problem

Setting up huly-mcp with Claude Code on Windows fails when HULY_PASSWORD contains special characters (*, %, !, etc.). Additionally, self-hosted Huly has specific gotchas that aren't documented.

Environment

Issues encountered

1. Shell escaping mangles passwords with special characters

Using claude mcp add with -e flag:

claude mcp add huly -e HULY_PASSWORD='my*pass%word!' -- no

[Read the thread](https://github.com/dearlordylord/huly-mcp/issues/7) · 2026-03-16 · closed · outside contributor · 0 comments

The remaining reports are on [the project's issue tracker](https://github.com/dearlordylord/huly-mcp/issues).