Merge remote-tracking branch 'origin/master' into worktree/preset-plane-fallout-p1

The vendored Cordis rescope (`cordis` -> `@deepseek-ai/cordis`,
`@cordisjs/plugin-*` -> `@deepseek-ai/cordis-plugin-*`) collided with this
branch's two added edges. Resolved by taking master's package names and
keeping this branch's additions: `@deepseek-ai/dsh-agent` and
`@deepseek-ai/dsh-system-prompt` peers, the `scopeChainOf` import, and the
`agent/created` type-only edge.

`docs/event-producer-consumer.*` is generated; regenerated after the merge
rather than hand-resolved.

packages/bundle/headless/src/index.ts

@@ -8,8 +8,8 @@
  */
 
 import { randomUUID } from 'node:crypto'
-import type { Context } from 'cordis'
-import z from 'schemastery'
+import type { Context } from '@deepseek-ai/cordis'
+import z from '@deepseek-ai/schemastery'
 import { installModelSelection } from '@deepseek-ai/dsh-agent'
 import type { ModelSelectionRef } from '@deepseek-ai/dsh-agent'
 import type {} from '@deepseek-ai/dsh-agent-default-model'
@@ -17,7 +17,7 @@ import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import { SessionId } from '@deepseek-ai/dsh-session'
 import type { SessionEvent } from '@deepseek-ai/dsh-session'
 // Empty type import carries the loader Context merge for the settlement await.
-import type {} from '@cordisjs/plugin-loader'
+import type {} from '@deepseek-ai/cordis-plugin-loader'
 
 /** Stable Cordis plugin name. */
 export const name = 'headless-runner'
@@ -52,7 +52,7 @@ export interface HeadlessIo {
   exit(code: number): void
 }
 
-declare module 'cordis' {
+declare module '@deepseek-ai/cordis' {
   interface Context {
     /** Process-facing effects provided before the headless tree mounts. */
     headlessIo?: HeadlessIo

packages/bundle/headless/src/invariant.ts

@@ -3,7 +3,7 @@
  * @module @deepseek-ai/dsh-headless/invariant
  */
 
-import type { Context } from 'cordis'
+import type { Context } from '@deepseek-ai/cordis'
 import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
 
 const PACKAGE_NAME = '@deepseek-ai/dsh-headless'