fix: regenerate cordis catalog and allowlist the diagnostic fixture

The subagent API surface change staled the committed catalog artifacts;
the snapshot fixture agent is referenced only from its cordis.snapshot.yml,
so knip learns it as an entry like its siblings.

docs/cordis-catalog/services.md

@@ -2099,22 +2099,28 @@ registerContinuableSetup(contribution: ContinuableSetupContribution): () => void
 async drainContinuableDescendants(parents: readonly Agent[]): Promise<void>
 
 /**
- * Enumerate the parent's direct session-backed subagents from the
- * live-preferred session corpus without loading or resuming an Agent. Session
- * query supplies lineage, candidate order, event reads, and live state; this
- * service interprets descriptor mode, activity, and per-child diagnostics
- * without consulting Agent registrations, Activations, or providers.
+ * Enumerate the parent's direct session-backed subagents without loading or
+ * resuming an Agent and without any query seam: the listing merges the live
+ * session store with optional session persistence (live-preferred) and
+ * serves each child's durable mode/label from the registered `subagent`
+ * projection unit — the registry's watermark snapshot for a live child, one
+ * persistence inspection folded through the registry for a cold one. The
+ * projection fold is the single classification authority; per-child
+ * diagnostics relay a fold that served no identity or a failed inspection,
+ * never a list-time descriptor parse. Absent persistence, enumeration is
+ * live-only (a cold child cannot be resumed then either, so its absence is
+ * capability absence, not an error). This service consults no Agent
+ * registrations, Activations, or providers.
  *
- * The trace and exact descriptor read receive `signal`; the full event-list
- * read has no signal parameter, so the scan rechecks cancellation around
- * every await and between candidates. Query rejections that settle after an
- * abort become a stable `SubagentError` with code `CANCELLED`.
+ * Every persistence read receives `signal`, and the listing rechecks
+ * cancellation around each of those awaits. Read rejections that settle
+ * after an abort become a stable `SubagentError` with code `CANCELLED`.
  * @param parentSessionId - parent session whose direct children are listed.
- * @param signal - caller-owned cancellation forwarded where supported and
- *   observed around every query await.
- * @returns children and per-child diagnostics in stable trace order.
- * @throws {@link SubagentError} when session query is unavailable or the
- *   caller cancels the scan.
+ * @param signal - caller-owned cancellation forwarded to persistence reads
+ *   and observed around every read await.
+ * @returns children and per-child diagnostics ordered by `createdAt`, then id.
+ * @throws {@link SubagentError} when the projection registry or the session
+ *   store is not mounted, or the caller cancels the listing.
  */
 listChildren(parentSessionId: SessionId, signal?: AbortSignal): Promise<SubagentListEntry[]>
 

knip.json

@@ -36,6 +36,7 @@
       "entry": [
         "headless-agent/tests/fixtures/cli-mock-llm.ts",
         "headless-agent/tests/fixtures/semantic-checkpoint-agent.ts",
+        "headless-agent/tests/fixtures/subagent-diagnostic-agent.ts",
         "headless-agent/tests/fixtures/subagent-inheritance-agent.ts",
         "headless-agent/tests/fixtures/workspace-context-resume-agent.ts",
         "headless-agent/tests/fixtures/goal-domain/seed-goal.ts",

packages/cordis/tool-cordis/src/api-catalog.ts

@@ -938,7 +938,7 @@ export const SERVICE_API: readonly ServiceApiEntry[] = [
       },
       {
         signature: 'listChildren(parentSessionId: SessionId, signal?: AbortSignal): Promise<SubagentListEntry[]>',
-        jsDoc: '/**\n * Enumerate the parent\'s direct session-backed subagents from the\n * live-preferred session corpus without loading or resuming an Agent. Session\n * query supplies lineage, candidate order, event reads, and live state; this\n * service interprets descriptor mode, activity, and per-child diagnostics\n * without consulting Agent registrations, Activations, or providers.\n *\n * The trace and exact descriptor read receive `signal`; the full event-list\n * read has no signal parameter, so the scan rechecks cancellation around\n * every await and between candidates. Query rejections that settle after an\n * abort become a stable `SubagentError` with code `CANCELLED`.\n * @param parentSessionId - parent session whose direct children are listed.\n * @param signal - caller-owned cancellation forwarded where supported and\n *   observed around every query await.\n * @returns children and per-child diagnostics in stable trace order.\n * @throws {@link SubagentError} when session query is unavailable or the\n *   caller cancels the scan.\n */',
+        jsDoc: '/**\n * Enumerate the parent\'s direct session-backed subagents without loading or\n * resuming an Agent and without any query seam: the listing merges the live\n * session store with optional session persistence (live-preferred) and\n * serves each child\'s durable mode/label from the registered `subagent`\n * projection unit — the registry\'s watermark snapshot for a live child, one\n * persistence inspection folded through the registry for a cold one. The\n * projection fold is the single classification authority; per-child\n * diagnostics relay a fold that served no identity or a failed inspection,\n * never a list-time descriptor parse. Absent persistence, enumeration is\n * live-only (a cold child cannot be resumed then either, so its absence is\n * capability absence, not an error). This service consults no Agent\n * registrations, Activations, or providers.\n *\n * Every persistence read receives `signal`, and the listing rechecks\n * cancellation around each of those awaits. Read rejections that settle\n * after an abort become a stable `SubagentError` with code `CANCELLED`.\n * @param parentSessionId - parent session whose direct children are listed.\n * @param signal - caller-owned cancellation forwarded to persistence reads\n *   and observed around every read await.\n * @returns children and per-child diagnostics ordered by `createdAt`, then id.\n * @throws {@link SubagentError} when the projection registry or the session\n *   store is not mounted, or the caller cancels the listing.\n */',
       },
       {
         signature: 'registerProvider(provider: SubagentProvider): () => void',