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* fix(daemon): scope claim-time comment fetches to the task's workspace (MUL-4252) The daemon claim path embeds the triggering comment and every coalesced comment's full text into the agent prompt, but fetched them with an unscoped `GetComment(id)` — a task row carrying a foreign comment UUID would pull another workspace's comment text into the prompt. On a shared SaaS backend (tens of thousands of workspaces in one DB) that is a tenant boundary hole, latent today only because task rows are server-written. Switch all three claim/reconcile GetComment calls to GetCommentInWorkspace, scoped by the runtime's workspace (claim path) or the issue's workspace (completion reconcile). The task's issue workspace is already asserted equal to the runtime workspace, so same-workspace delivery is unchanged; a foreign UUID now resolves to "missing" and is skipped — matching buildCoalescedCommentData's documented behavior. Adds DB-backed claim tests: same-workspace trigger comment is still delivered; a foreign-workspace comment's content never surfaces. Co-authored-by: multica-agent <github@multica.ai> * fix(cli): extend the workdir guardrail to --attachment paths (MUL-4252) #5167 fenced --description-file/--content-file to the working directory but left --attachment uncovered — the same /tmp stale-file leak in image form: an agent that writes chart.png to a machine-shared path and attaches it could upload another run's (possibly another workspace's) stale file. Apply ensureAttachmentWithinWorkdir to each local --attachment path in `issue create` and `comment add` (URL values are still skipped upstream), reusing #5167's symlink-resolving fileWithinWorkingDir and the existing --allow-external-file escape hatch. Rejection happens before the issue is created, so a bad path never yields a half-created issue. Co-authored-by: multica-agent <github@multica.ai> * fix(service): scope trigger-summary + originator resolution to the task's workspace (MUL-4252) PR review P1: the claim-time full-comment fetch was already scoped, but the trigger_summary snapshot (first ~200 chars) still leaked. On the real enqueue/merge paths a foreign comment UUID flowed through buildCommentTriggerSummary / resolveOriginatorFromTriggerComment, which used an unscoped GetComment; the truncated text was stored on the task row and later returned in the claim / task-history response (handler/agent.go trigger_summary). Thread the issue's workspace through both helpers (and their exported merge-path wrappers) and switch to GetCommentInWorkspace, so a cross-workspace comment resolves to "missing": trigger_summary stays NULL and no foreign originator is inherited. Every caller already has the issue's WorkspaceID in scope (enqueue, mention/leader, deferred fallback, merge, completion reconcile). Rework the claim test to drive the REAL TaskService.EnqueueTaskForIssue path (which snapshots the summary) and assert the stored row's trigger_summary + originator_user_id stay NULL and the claim response carries neither the foreign body nor the foreign summary. Verified the test fails when the summary fetch is left unscoped. Co-authored-by: multica-agent <github@multica.ai> * fix(cli): validate all --attachment paths before uploading any in comment add (MUL-4252) PR review P2: `issue comment add` checked-read-uploaded each attachment in one loop, so a valid workdir attachment followed by an invalid (external / symlink-escaping) one uploaded the first file — orphaning it as an issue-level attachment — then aborted before posting the comment, and a retry duplicated it. Extract the URL-filter + workdir-guard + read step `issue create` already used into a shared collectLocalAttachments helper and have comment add use it: every attachment is validated and read up front, and nothing is uploaded unless all pass. Adds a command-level test asserting a valid-then-external attachment pair aborts with ZERO upload requests and no comment (fails against the old interleaved loop). Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: J <j@multica.ai> Co-authored-by: multica-agent <github@multica.ai>