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GitLab MCP: workItem query fails, workItems works

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#985 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
48/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Quiet
Tech stack
gitlab, graphql, typescript
Domain
cli, tooling

Research direction

Start by locating the GitLab MCP tools, their built-in guidance or examples, and the handling around gitlab_execute_custom_query; compare the failing workItem field with the working workItems(iid: ...) query. Done means selecting and implementing one agreed improvement—canonical guidance, schema-aware lookup, or a single suggested-field retry—with coverage for the work-item query behavior.

Written by the indexing model from the issue text.

Description

Observed behavior

When querying a GitLab work item via gitlab_execute_custom_query, my first attempt used the field workItem on Project, which failed with:

GraphQL error: Field 'workItem' doesn't exist on type 'Project' (Did you mean `workItems`?)

Retrying with workItems(iid: "...") on Project succeeded and returned the expected work item.

Why this is worth improving

The GitLab GraphQL schema evidently drifted (either workItem was removed/renamed, or it never existed on Project and only workItems did). The agent-side pattern is:

  1. First call fails with a schema error.
  2. Agent reads the "Did you mean" hint from the error and adjusts.
  3. Second call succeeds.

This works, but it wastes a round-trip on every session that touches work items, and it depends on the agent noticing the hint. A more robust experience would be one of:

  • Auto-retry once when the error message contains a Did you mean suggestion, substituting the suggested field.
  • A schema-aware helper (e.g., gitlab_get_type_fields results cached and surfaced in the tool description) so the agent picks the right field on the first try.
  • Update any built-in guidance/examples in the GitLab MCP tools to reference workItems(iid: ...) { nodes { ... } } as the canonical way to fetch a single work item by IID on a Project.

Impact: minor per-call latency + agent context spent on the schema hint. Not blocking, but repeatable across sessions.


Metadata
Field Value
CLI Version 0.8.10
Platform darwin
Architecture arm64
OS Release 25.5.0
Category improvement
Working Directory feature-1173-parallel-ci-databases
Session ID ses_0c9a0177effeYuBnIpoLd52aQ1
Dominant language
TypeScript
Stars
813
Forks
134
Avg merge
2d 5h
Merged PRs (30d)
63

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  4. Open a pull request that references the issue number.

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