docs: reserve seam for complete capabilities

packages/core/agent-loop/tests/cancel.spec.ts

@@ -485,7 +485,7 @@ describe('Agent.cancel()', () => {
     const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
 
     // A step/start session-event listener fires AFTER step/start is appended
-    // (and after the pre-step seam), so cancelling there lands in the SECOND
+    // (and after the pre-step extension point), so cancelling there lands in the SECOND
     // cancel check (the one that must closeStep() to balance the already-open
     // step) — distinct from a turn-start cancel, caught before the step opens.
     let streamed = false

packages/core/agent-loop/tests/interception.spec.ts

@@ -19,7 +19,7 @@ import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { MockAdapter, textResponse, toolCallResponse } from './mock-adapter.ts'
 
 /**
- * The interception seams introduced by the hooks taxonomy: `agent/pre-step`,
+ * The interception points introduced by the hooks taxonomy: `agent/pre-step`,
  * `agent/session-start`, `agent/turn-stopping`, and the
  * `tools/pre-execute` / `tools/post-execute`
  * split with `additionalContexts` buffering. These verify the canonical event