Rewrite the main-agent citation contract to a single [n] channel and sync
the orphaned system_prompt_composer surface to match; drop stale
[citation:chunk_id] / <chunk_index> references from dynamic_context and
provider hints. Reuse the shared hybrid search in the deliverables report
(citations omitted for now) and delete the orphaned report KB helper.
Remove the dead eager KnowledgePriorityMiddleware wiring (knowledge_priority
+ stack) and its legacy browse test. Update ADR 0001 to reflect the cutover.
web_search now registers each result as a WEB_RESULT (locator {url}) and
renders a <web_results> block of <document view="excerpt"> [n] passages,
returning Command(update={messages, citation_registry}) like
search_knowledge_base. Collapse the duplicate research-subagent web_search
into the shared tool and teach the prompts to cite web hits with [n].
The main agent's search_knowledge_base tool runs the hybrid spine, renders
a <retrieved_context> of numbered [n] passages, and persists the registry.
KB subagent prompts teach citing [n] from <document view="full"> reads
(evidence.chunk_ids -> evidence.citations). Delete the now-unused
search->read highlighting hand-off: the kb_matched_chunk_ids state field,
its reducer default, the tool's _matched_chunk_ids writer, and the dead
KnowledgePriorityMiddleware writes.
Add the checkpointed CitationRegistry (load/merge helpers + state field)
and a lightweight CitationStateMiddleware so subagents can register into
the same conversation registry. Resolve [n] -> [citation:<payload>] at
stream finalize from the registry, polymorphically by source type.
Add a shared document_render package that renders sources as
<document view="excerpt|full"> blocks with server-assigned [n] passage
labels (KB locator {document_id, chunk_id}, web locator {url}). Wire the
KB read backend (kb_postgres) and read_file to the new renderer and drop
the legacy per-document XML renderer (document_xml, retrieved_context) and
the old chunk_index / matched="true" / <chunk id> read format.
Mirror search_threads visibility in the referenced-chat resolver: a
search-space owner can now @-mention legacy threads that predate creator
tracking (null created_by_id), instead of those being silently dropped.
Thread mentioned_thread_ids from the route through the orchestrator into
input-state assembly, resolve them for the requesting user, and append
the rendered referenced-chat block to the agent's query context.
Add the referenced_chat_context slice: models for the data shapes, a
fail-closed resolver that fetches mentioned threads and their visible
turns under the same access rules as thread search, and a transcript
renderer that emits a budgeted <referenced_chat_context> block. When a
chat exceeds the per-reference character budget, recent turns are kept
and any leftover budget is filled with the overflowing turn's tail, with
truncation markers signalling the cut.
Extend the chat contract so a turn can reference other conversations:
add the "thread" kind to MentionedDocumentInfo and a mentioned_thread_ids
field on NewChatRequest and RegenerateRequest.
