devintern

Fetch Linear issues, move workflow states, implement with your coding agent, and open PRs with summaries posted back.

Implement Linear Issues with @devintern/code

@devintern/code can implement work directly from Linear issues: fetch issue details and comments, run a feasibility check, move the issue through your workflow states, execute your AI agent, commit changes, open a pull request, and post results back to the issue.

Prerequisites

  • Bun and @getdevintern/code installed globally
  • Linear Personal API key
  • Git repository for your project

Setup

1. Set the task tracker

In .devintern-code/.env:

TASK_TRACKER=linear

2. Add your Linear API key

LINEAR_API_KEY=lin_api_xxxxxxxxxxxx

Create the key at Linear API settings: under Personal API keys, click Create key, add a label (e.g. DevIntern), and copy the key. It starts with lin_api_ and cannot be viewed again after you leave the page. The key inherits your Linear account permissions.

3. Configure workflow state transitions

Edit .devintern-code/settings.json using the team key (the prefix in identifiers like ENG-42) as the project key:

{
  "linear": {
    "projects": {
      "ENG": {
        "inProgressStatus": "In Progress",
        "todoStatus": "Backlog",
        "prStatus": "In Review"
      }
    }
  }
}

State names must match your team’s workflow states (case-insensitive). @devintern/code moves issues to:

  • inProgressStatus when implementation starts (after the clarity check)
  • prStatus after a pull request is created
  • todoStatus when implementation is incomplete or max turns are reached

See Configuration for all settings fields.

Running an issue

Pass an issue identifier or a full issue URL:

# Identifier
devintern ENG-42 --create-pr

# Full issue URL
devintern https://linear.app/acme/issue/ENG-42/fix-login-bug --create-pr

This workflow:

  1. Fetches the issue description, labels, attachments, and comments
  2. Runs a feasibility assessment (skippable with --skip-clarity-check)
  3. Moves the issue to inProgressStatus (unless --skip-comments is set)
  4. Creates a feature branch, runs your agent, commits, and optionally opens a PR
  5. Moves the issue to prStatus after PR creation
  6. Posts implementation or assessment comments on the issue

Batch processing with —query

Select multiple issues with a Linear IssueFilter expressed as JSON:

devintern --query '{"state":{"name":{"eq":"Todo"}},"team":{"key":{"eq":"ENG"}}}' --create-pr

Plain text works too and matches against issue titles (case-insensitive contains):

devintern --query "login bug" --create-pr

The first 50 matching issues are processed in sequence.

Story points estimation

Linear has a native estimate field, so estimation mode is fully supported:

devintern ENG-42 --estimate

This analyzes the issue, sets the native estimate value, and posts (or updates) an estimation comment with reasoning, risks, and unclear areas.

Limitations

  • Attachments: files hosted on uploads.linear.app are downloaded with your API key. External attachment links (Figma, Google Docs) are passed to the agent as links.
  • Comments: use --skip-comments to skip Linear comments and state transitions for a run.

Troubleshooting

“Missing required Linear environment variables”

Ensure LINEAR_API_KEY is set in .devintern-code/.env.

Issue does not move between states

Confirm the state names in settings.json match your team’s workflow states, and that the project key is the team key from the issue identifier (ENG for ENG-42).

“Workflow state “In Progress” not found for team”

Check spelling against your team’s workflow states in Linear settings. Available states are shown in the error message.

“Invalid Linear IssueFilter JSON”

Quote the JSON filter in single quotes in your shell and validate it against the IssueFilter schema in the Linear GraphQL explorer.