Issues pane: live roadmap view (dependency order, blocked/ready, live work) toggled with the milestone view #13

Request (owner, 2026-10-12)

The issues pane should become a live roadmap: a to-do list of the issues still to resolve, in execution and dependency order.

• A toggle switches between this roadmap and today's milestone view.
• Each row shows whether the issue is blocked or ready.
• Each row shows a live indicator when the issue is being worked on now, connected to its thread, branch, worktree, pull request or delegated worker.

Today

• apps/web/src/components/issues/issueTree.logic.ts: groupIssuesByMilestone groups by milestone and sorts each group by updatedAt, newest first. Nothing in it reflects order or dependencies.
• packages/contracts/src/issue.ts: IssueSummary has no dependency or sub-issue fields.
• T3 already has live work state (IssueWorkStatus in packages/contracts/src/issueWork.ts, ThreadLinkedIssue in threadIssue.ts), but it only covers repository-managed issue work.

Design

1. Dependencies come from GitHub's native issue relationships only. Use the Issue blockedBy/blocking connections (also issueDependenciesSummary) and the parent/subIssues connections. Do not parse issue bodies.
   • Add blockedBy: IssueRef[] (open and closed) and parent: IssueRef | null to IssueSummary.
   • A blocker in another repository is shown but not ordered.
2. The view toggle is "Milestones | Roadmap" in the pane header, remembered per repository. The milestone view stays exactly as it is today.
3. Roadmap order. The list holds open issues only.
   • Run a topological sort over open blocker → blocked edges; closed blockers impose nothing. An open sub-issue also comes before its parent.
   • Break ties by milestone, in the milestone view's group order, then by issue number, oldest first.
   • If a cycle remains, list those issues by number and badge them "dependency cycle".
   • Sections, top to bottom:
     • In progress: has live work.
     • Ready: no open blockers.
     • Blocked: shows "blocked by #a, #b", each a link.
   • Within each section the topological order holds.
4. Live indicator.

   • An animated "working" icon shows while any linked thread, task or worker has a running turn. A distinct icon shows for waiting on you, and a quiet icon for linked but idle.

   • The tooltip lists each linked thread's title, branch, worktree and pull request. A click opens the thread.

   • Link sources:

     • (a) existing repository-managed issue work and ThreadLinkedIssue;
     • (b) a pull request linked to a thread (link_pull_request) that references the issue;
     • (c) a new link_issue MCP tool, mirroring link_pull_request, so any thread or delegated child can register the issue it works on without becoming repository-managed issue work.

     Today delegate_task's issue parameter fails with "repository orchestrator is unavailable or paused" unless a repository orchestrator owns the issue, so plain orchestrator threads cannot link their workers.

5. Liveness. The view refreshes on the existing issue refresh path. Dependency, label and work-state changes appear without a reload.

Acceptance (tannerpolley/ePC-SAFT, which records native Blocked by)

• Roadmap lists failed to refresh available models pingdotgg/t3code#431 before feat(web): add theme system with light/dark/night modes and compact u… pingdotgg/t3code#432, and fix: add Claude Code health check and error guidance pingdotgg/t3code#423 before [(likely) Low-ish Priority] Utilize Electron Fuses pingdotgg/t3code#439 before No way to reopen window pingdotgg/t3code#435. Open external link doesn't work - MacOS pingdotgg/t3code#434 comes after fix: add Claude Code health check and error guidance pingdotgg/t3code#423.
• feat(web): add theme system with light/dark/night modes and compact u… pingdotgg/t3code#432, [(likely) Low-ish Priority] Utilize Electron Fuses pingdotgg/t3code#439, No way to reopen window pingdotgg/t3code#435 and Open external link doesn't work - MacOS pingdotgg/t3code#434 show "blocked by" their open blockers.
• An issue whose linked builder thread is running shows the working icon, and clicking it opens that thread. The icon clears when the thread stops.
• Toggling back shows the unchanged milestone view.
• Closing a blocker moves the blocked issue to Ready on the next refresh.

Out of scope

Editing dependencies from T3, manual ranking, and closed issues in the roadmap.