linear-to-github

name	linear-to-github
description	Convert Linear tickets — explicit IDs or whole groups (e.g. a project, label, or milestone) — into GitHub issues in JesusFilm/core on the Next Steps org project board.
disable-model-invocation	true

Linear → GitHub

Convert Linear tickets into GitHub issues, one issue per ticket (phased migration, ENG-3688). The GitHub side runs entirely through the gh CLI (conventions: docs/agents/issue-tracker.md); the Linear side through the Linear MCP tools.

• Repo: JesusFilm/core
• Board: the Next Steps org project (#8) — the only Project converted issues land on; its Status field, labels, milestones, and stable IDs are the contract in docs/agents/github-projects.md (the board doc).
• Provenance marker: <!-- linear:ENG-XXXX --> as the last line of the issue body — the idempotency key.

Process

1. Resolve the ticket set

Arguments are any mix of:

• Ticket IDs or URLs (ENG-1234) — taken as-is.
• Group selectors — a Linear project, label, milestone, cycle, or team-plus-state; anything the Linear MCP list_issues can filter on. Expand each selector with the matching filter, paging until exhausted; for a project milestone, list the project's issues and keep those in that milestone.

Group expansion keeps open tickets (backlog, unstarted, started); completed and canceled tickets join the set only when the user asks for them. Dedupe across selectors.

Confirmation gate. Before converting, show the resolved set (count + ID — title lines) and get the user's go-ahead.

Done when every argument is expanded, the set is deduped, and the user has confirmed it.

2. Choose the set's board home

Ask the invoker (in the same exchange as step 1's confirmation) where the set lands — one home is enough:

• A feature — the feature:<kebab-name> label, optionally plus its <feature>: <stage> phase milestone. List the existing labels to pick from:

  gh label list --repo JesusFilm/core --json name --jq '[.[].name | select(startswith("feature:"))]'
  

  Create a new one before use:

  gh label create "feature:<kebab-name>" --repo JesusFilm/core --color 0e7c86
  

• Or a bug/improvement — the rolling bugs / improvements milestones. The milestone is the whole home: no label of any kind (there are no Bug/Improvement labels on this board).

Milestones are one per issue. List them, or create a missing phase (formats in the board doc):

gh api repos/JesusFilm/core/milestones --jq '.[].title'
gh api repos/JesusFilm/core/milestones -f title="<feature>: <stage>"

Plus anything else the invoker wants as labels (e.g. ai-auto-workflow).

New feature label → new view. Views are UI-only — prompt the user to add the feature's view on the board (recipe in the board doc).

The choices apply to every ticket in the set; the invoker can name per-ticket exceptions. Done when each ticket has its home decided and anything newly named exists in the repo.

3. Fetch each ticket from Linear

Fetch the full ticket: title, description, comments, labels, project milestone, parent and sub-issue relations, attachments (Linear MCP: get_issue with relations, plus list_comments).

Then follow the context one hop: the parent's description, and any ticket the description or comments lean on — enough of each to know what it contributes. One hop is the boundary; no crawling the graph.

Tickets in a completed or canceled state are reported and skipped — convert one only when the user asked for it by ID, noting the closed state in the report.

Done when every ticket has every field listed above plus its one-hop context in hand (empty is fine; unfetched is not).

4. Check for an existing conversion

For each ticket, find its converted issue: search the visible footer text, then confirm the exact marker — GitHub search does not reliably match inside HTML comments, and a false miss here duplicates the issue:

gh issue list --repo JesusFilm/core --search 'ENG-XXXX in:body' --state all --json number,url,body

A candidate counts only when its body contains the literal <!-- linear:ENG-XXXX --> — mere mentions of the ticket in other converted issues also match the search. Issues created earlier in the same run count without searching (search indexing lags fresh issues).

A confirmed hit puts that ticket in update mode (reuse the found issue number); none puts it in create mode.

Done when every ticket is marked create or update, update tickets carrying their issue number.

5. Author the issue

The GitHub issue is authored, not transcribed — deliberately not one-to-one with the Linear description. Interpret everything step 3 fetched — description, comments, parent, leaned-on tickets — and write the issue that combines it: what to do, the context that shapes it, decisions that landed in comments or relatives. Each point taken from beyond the ticket's own description links its source. The bar: workable from GitHub alone, no Linear tab open.

Linear ticket mentions anywhere in the authored body become plain links — to the mention's GitHub issue if already converted (marker search as in step 4), otherwise to its Linear URL.

The fixed sections around the authored content:

• Relations: parent and sub-issues as links, resolved the same way. Omit the section when there are none.
• Attachments: the original Linear URLs, kept rather than re-hosted (uploads.linear.app needs a Linear session — say so). Omit the section when there are none.
• History from Linear: each comment as author, date, and text — the verbatim record behind the synthesis; in the body, not gh issue comment posts (gh would misattribute them to the converting account).
• Footer: provenance line and marker, recording the original Linear labels and milestone as text (the backfill source for the deferred mapping below).

The authored issue: what to do and the context that shapes it, synthesized from the ticket, its comments, parent, and leaned-on tickets — sources linked.

Relations

• Parent: ENG-1111 – title
• Sub-issue: ENG-2222 – title

Attachments

• name (requires Linear access)

History from Linear

Author Name (2026-07-08):

Comment text.

---

Converted from Linear ENG-XXXX · Linear labels: a, b · milestone: M

Done when every ticket has an authored body that is workable standalone — every load-bearing reference distilled in or linked to a converted GitHub issue — ending in its provenance marker.

6. Create or update, then confirm board placement

Write each ticket's body to its own temp file (body-ENG-XXXX.md), then per mode, with the step-2 home — --label and/or --milestone as chosen:

gh issue create --repo JesusFilm/core --title "..." --body-file body-ENG-XXXX.md --label "<step-2 label>"   # create
gh issue edit <number> --repo JesusFilm/core --title "..." --body-file body-ENG-XXXX.md --add-label "<step-2 label>"   # update

Per-ticket failure: record it in the report and continue with the remaining tickets.

Board placement: put every issue on the board and set its Status to Triage explicitly — the auto-add workflow can lag or leave items at No status:

item=$(gh project item-add 8 --owner JesusFilm --url <issue-url> --format json --jq .id)   # idempotent; returns the item id
gh project item-edit --id "$item" --project-id <project-id> --field-id <status-field-id> --single-select-option-id <triage-option-id>   # IDs in the board doc

The token needs the project scope (gh auth refresh -s project). Set a different Status only on request (option IDs in the board doc).

Relation fix-up (multi-ticket runs): after the whole set exists, recompose and gh issue edit every member whose Relations or mentions still point at Linear for a ticket this run converted — the step-4 search now resolves them.

Done when every ticket has an issue URL, its step-2 home, a board placement at Triage (or the requested Status), and no member links to Linear for a ticket converted in this run.

7. Comment back on Linear

Post one comment on each Linear ticket: Converted to GitHub: <issue-url>. Skip when any existing comment already contains that URL. Leave the ticket's state untouched.

Done when every converted ticket has a Linear comment linking its GitHub issue, freshly posted or pre-existing.

8. Report

A table: Linear ID → GitHub issue URL, mode (created / updated / skipped + reason / failed + error), board Status, labels and milestone applied.

Done when every input ticket has a row.

Automatic mapping — deferred

Inferring GitHub labels/milestone from Linear metadata is deferred; each run's choices come from the invoker (step 2). The originals ride in the issue footer as the backfill source — record the mapping table here when it's decided.