IdeA/.ideai/tickets/154/issue.md

id, number, title, status, priority, sprint, links, agentRefs, attachments, createdBy, updatedBy, createdAt, updatedAt, version

id	number	title	status	priority	sprint	links	agentRefs	attachments	createdBy	updatedBy	createdAt	updatedAt	version
551a6639-315d-4ff3-8a01-7ecc077b0e30	154	Foundation: durable agent/chat attachments pipeline with sandbox-safe file access	closed	high	null				kind agent_id agent a6c6ea12-bfc6-4bdc-8031-324102dfa34d	kind agent_id agent a6c6ea12-bfc6-4bdc-8031-324102dfa34d	1785964740314	1786007117802	3

Build a first-class attachment pipeline for agent/custom-chat flows so user-supplied files are persisted, referenced, and readable by agents without prompt-string bricolage. Scope includes durable storage location, DTO/contracts, routing through structured chat flows, and sandbox/readability guarantees for attached files.