Merge remote-tracking branch 'origin/master' into codex/project-instruction-files

# Conflicts:
#	docs/config-catalog.md
#	docs/cordis-catalog/events.md
#	docs/cordis-catalog/services.md
#	docs/core-data-structures/core.md
#	docs/event-producer-consumer.md
#	docs/persistence-catalog.md
#	docs/rfc/implemented/feature/2026-06-15-code-mode.md
#	docs/rfc/implemented/feature/2026-06-30-interception-seams.md
#	docs/rfc/proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md
#	docs/tool-execution-pipeline.md
#	packages/cordis/tool-cordis/src/api-catalog.ts
#	packages/core/agent-core/tests/agent-core.spec.ts
#	packages/core/agent-loop/src/agent.ts
#	packages/core/agent/README.md
#	packages/core/session/src/index.ts
#	packages/core/tools/README.md
#	packages/core/tools/src/index.ts
#	pnpm-lock.yaml
#	scripts/gen-doc-graphs.ts
#	scripts/type-equiv.manifest.json

packages/ui/stdio-agent/tests/stdio-agent.spec.ts

@@ -4,7 +4,7 @@ import { join } from 'node:path'
 import { tmpdir } from 'node:os'
 import { Context } from 'cordis'
 import Loader from '@cordisjs/plugin-loader'
-import { AgentId } from '@deepseek-ai/dsh-agent'
+import { AgentId, agentEvents, type Agent } from '@deepseek-ai/dsh-agent'
 import type { Message } from '@deepseek-ai/dsh-llm'
 import { TOOL_ORDER_REST } from '@deepseek-ai/dsh-system-prompt'
 import * as stdioAgent from '../src/index.ts'
@@ -43,10 +43,11 @@ async function isolatedSkillsConfig(catalogDescriptionMaxLength?: number): Promi
 }
 
 async function composePrefix(ctx: Context): Promise<Message[]> {
+  const agent = { session: { header: { cwd: '/tmp' } } } as unknown as Agent
   const empty: Message[] = []
-  return await ctx.waterfall(
-    'agent/session-prefix', { session: { header: { cwd: '/tmp' } } } as never,
-    empty, new AbortController().signal, () => Promise.resolve(empty),
+  return await agentEvents(ctx, agent).waterfall(
+    'agent/session-prefix', empty, new AbortController().signal,
+    () => Promise.resolve(empty),
   )
 }