Merge remote-tracking branch 'origin/master' into session-query-tool

# Conflicts:
#	docs/architecture.i18n.yaml

packages/context/session-reference/README.md

@@ -5,7 +5,7 @@
 ## Public API
 
 - `listCandidates(agent, query?, limit?)` lists sessions other than `agent.id`, filters case-insensitively by id or cwd, and ranks same-cwd, cwd-less, then other-cwd records while preserving `listSessions()` creation order within each group. Each selected candidate uses its latest log-backed title as the mention label and falls back to the session id; titles and message bodies are not searched.
-- `prepare(agent, content, references, signal?)` preserves first-mention order, deduplicates ids, rejects self-reference and more than the configured distinct-source limit, reads every source in parallel, and returns detached content plus zero or one aggregated `HookContext`. Any invalid reference, failed read, cancellation, or budget failure rejects before the host calls `send()` or `steer()`.
+- `prepare(agent, content, references, signal?)` preserves first-mention order, deduplicates ids, rejects self-reference and more than the configured distinct-source limit, reads every source in parallel, and returns detached content plus zero or one aggregated `HookContext`. Any invalid reference, failed read, cancellation, or budget failure rejects before the host calls `followup()` or `steer()`.
 - `encodeSessionReferenceUri()` and `decodeSessionReferenceUri()` implement `dsh-session:<base64url(JSON.stringify(sessionId))>` so every JavaScript string id round-trips exactly. `formatSessionReferenceMention()` emits `@[label](uri)`, and `parseSessionReferenceText()` replaces Markdown mentions or bare canonical URIs with readable `@label` text while returning structured references. Explicit Markdown mentions reject every malformed URI; bare text is considered a reference only when a non-empty base64url-shaped payload follows the scheme, and a matching noncanonical candidate still fails. Empty or punctuation-only scheme mentions remain ordinary discussion text.
 
 ## Snapshot semantics

packages/context/session-reference/src/projection.ts

@@ -57,7 +57,6 @@ function projectSessionConversation(snapshot: SessionSurfaceSnapshot): Projected
         break
       }
       case 'tool/result':
-      case 'context/message':
         break
       /* v8 ignore next 2 -- SurfaceEventType is closed and every variant is handled above. */
       default:

packages/context/session-reference/tests/session-reference.spec.ts

@@ -78,7 +78,7 @@ function appendConversation(session: Session): void {
     { surfaceOp: 'append' },
   )
   session.append(
-    'context/message',
+    'user/message',
     { content: [{ type: 'text', text: 'workspace secret' }], source: { kind: 'plugin', plugin: 'workspace' } },
     { surfaceOp: 'append' },
   )