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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Agents can create and assign issues to other agents, and commonly escalate to their org-chart manager (`reports_to`) when they hit something outside their authority > - Issue assignment already refuses terminated and pending-approval assignees, but accepts paused assignees from any actor > - A paused agent never runs, so agent-initiated escalations to a paused manager become invisible dead letters — accepted silently, never picked up, never surfaced > - This pull request refuses paused assignees when the assigning actor is an agent, at the single normalization helper all four assignment paths flow through > - The benefit is that agent-routed work can no longer silently vanish into a paused agent's queue ## Linked Issues or Issue Description Fixes #10641 ## What Changed - `normalizeIssueAssigneeAgentReference` (used by issue create, both child-create routes, and issue update) now throws a 409 when an **agent** actor assigns to a **paused** agent, with a message naming the alternatives: assign an invokable agent, leave the issue unassigned, or escalate to a board operator. - Board/user actors are unchanged and may still assign to paused agents deliberately — the pause state is visible in the UI, and staging work for a later unpause is a legitimate workflow. Terminated / pending-approval / invalid-org-chain refusals are unchanged for all actors. - This matches the existing precedent for watchdogs ("Cannot assign watchdog to an agent that is not invokable") using the same conflict-error shape. ## Verification - `pnpm vitest run server/src/__tests__/issue-assignee-invokability-routes.test.ts` — new coverage: agent PATCH → paused assignee 409 (no update call), agent child-create → paused assignee 409 (no create call), agent assignment to an invokable agent still 200, board assignment to a paused agent still 200. - Neighboring suites unchanged: `issue-update-comment-wakeup-routes`, `issue-agent-mutation-ownership-routes`, `issue-create-deduplication-routes`, `issue-watchdogs-routes` (97 tests). - `cd server && pnpm run typecheck`. ## Risks - Low. The only behavior change is a new 409 for agent actors assigning to paused agents — previously a silent dead-letter. Agents that relied on this (escalation flows) now get an actionable error instead; human workflows are untouched. ## Model Used Claude Fable 5 (`claude-fable-5`, Anthropic) via Claude Code — extended thinking, agentic tool use. No other models involved. ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [ ] All Paperclip CI gates are green - [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge