diff --git a/docs/config-catalog.md b/docs/config-catalog.md
index 4cac932a6f..53e5142dff 100644
--- a/docs/config-catalog.md
+++ b/docs/config-catalog.md
@@ -394,7 +394,7 @@ export interface DeepSeekCatalogModel {
 }
 ```
 
-Source: [`packages/llm/llm-deepseek/src/index.ts:36`](../packages/llm/llm-deepseek/src/index.ts)
+Source: [`packages/llm/llm-deepseek/src/index.ts:33`](../packages/llm/llm-deepseek/src/index.ts)
 
 ## `@deepseek-ai/dsh-llm-pi-ai`
 
diff --git a/packages/llm/llm-deepseek/README.md b/packages/llm/llm-deepseek/README.md
index 7da98cdebf..a4b43342e4 100644
--- a/packages/llm/llm-deepseek/README.md
+++ b/packages/llm/llm-deepseek/README.md
@@ -4,6 +4,8 @@ DeepSeek chat-completions adapter for the harness LLM seam: hand-rolled `fetch`
 
 A second, library-backed implementation of the same seam exists in `@deepseek-ai/dsh-llm-pi-ai`. This package always owns the `deepseek` provider route; mounting a pi-ai profile with `provider: deepseek` in the same context throws `LlmError('DUPLICATE_ADAPTER')` by design.
 
+The package root exposes the Cordis plugin contract and `DeepSeekAdapter`; wire serialization, SSE parsing, and chunk translation helpers are not part of that root contract.
+
 ## Config
 
 ```yaml
diff --git a/packages/llm/llm-deepseek/src/index.ts b/packages/llm/llm-deepseek/src/index.ts
index 695831b1bd..f9f223b6ff 100644
--- a/packages/llm/llm-deepseek/src/index.ts
+++ b/packages/llm/llm-deepseek/src/index.ts
@@ -11,12 +11,9 @@ import type {} from '@deepseek-ai/dsh-llm'
 import { DeepSeekAdapter } from './adapter.ts'
 import type { DeepSeekCatalogModel } from './adapter.ts'
 
-export { DeepSeekAdapter, httpErrorCode } from './adapter.ts'
+export { DeepSeekAdapter } from './adapter.ts'
 export type { DeepSeekAdapterOptions, DeepSeekCatalogModel } from './adapter.ts'
-export { serializeMessages, serializeRequest } from './serialize.ts'
 export type { RequestDefaults } from './serialize.ts'
-export { DONE, parseSse } from './sse.ts'
-export { mapFinishReason, mapUsage, translate } from './translate.ts'
 export type * from './types.ts'
 
 export const name = 'llm-deepseek'
diff --git a/packages/llm/llm-deepseek/tests/adapter.spec.ts b/packages/llm/llm-deepseek/tests/adapter.spec.ts
index d1fc163651..77a8f1d8a4 100644
--- a/packages/llm/llm-deepseek/tests/adapter.spec.ts
+++ b/packages/llm/llm-deepseek/tests/adapter.spec.ts
@@ -4,7 +4,8 @@ import { afterEach, describe, expect, it, vi } from 'vitest'
 import { Context } from 'cordis'
 import LlmService, { LlmError, userAgent } from '@deepseek-ai/dsh-llm'
 import * as LlmDeepSeek from '@deepseek-ai/dsh-llm-deepseek'
-import { DeepSeekAdapter, httpErrorCode } from '@deepseek-ai/dsh-llm-deepseek'
+import { DeepSeekAdapter } from '@deepseek-ai/dsh-llm-deepseek'
+import { httpErrorCode } from '../src/adapter.ts'
 import { assemble } from './assemble.ts'
 
 /** One scripted behavior for the next request the mock server receives. */
@@ -236,6 +237,19 @@ describe('DeepSeekAdapter against a mock server', () => {
 })
 
 describe('plugin registration and config', () => {
+  it('keeps wire helpers off the package root', () => {
+    for (const helper of [
+      'httpErrorCode',
+      'serializeMessages',
+      'serializeRequest',
+      'DONE',
+      'parseSse',
+      'mapFinishReason',
+      'mapUsage',
+      'translate',
+    ]) expect(LlmDeepSeek).not.toHaveProperty(helper)
+  })
+
   it('registers the deepseek provider and unregisters on dispose (HMR safety)', async () => {
     const server = await mockServer([])
     const ctx = new Context()
diff --git a/packages/llm/llm-deepseek/tests/serialize.spec.ts b/packages/llm/llm-deepseek/tests/serialize.spec.ts
index 0a5d10e23b..8d3b190ed1 100644
--- a/packages/llm/llm-deepseek/tests/serialize.spec.ts
+++ b/packages/llm/llm-deepseek/tests/serialize.spec.ts
@@ -1,7 +1,7 @@
 import { describe, expect, it } from 'vitest'
 import { CallId } from '@deepseek-ai/dsh-llm'
 import type { ContentBlock, GenerateOptions, Message } from '@deepseek-ai/dsh-llm'
-import { serializeMessages, serializeRequest } from '@deepseek-ai/dsh-llm-deepseek'
+import { serializeMessages, serializeRequest } from '../src/serialize.ts'
 
 function request(overrides: Partial<GenerateOptions> = {}): GenerateOptions {
   return { provider: 'deepseek', model: 'deepseek-v4-flash', messages: [], ...overrides }
diff --git a/packages/llm/llm-deepseek/tests/sse.spec.ts b/packages/llm/llm-deepseek/tests/sse.spec.ts
index 2fc297bbec..b18862e4f3 100644
--- a/packages/llm/llm-deepseek/tests/sse.spec.ts
+++ b/packages/llm/llm-deepseek/tests/sse.spec.ts
@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest'
 import { LlmError } from '@deepseek-ai/dsh-llm'
-import { DONE, parseSse } from '@deepseek-ai/dsh-llm-deepseek'
+import { DONE, parseSse } from '../src/sse.ts'
 
 /** Build a byte stream from string fragments (fragments = network reads). */
 async function* bytes(...fragments: (string | Uint8Array)[]): AsyncGenerator<Uint8Array> {
diff --git a/packages/llm/llm-deepseek/tests/translate.spec.ts b/packages/llm/llm-deepseek/tests/translate.spec.ts
index d6968faed5..e62cebc4af 100644
--- a/packages/llm/llm-deepseek/tests/translate.spec.ts
+++ b/packages/llm/llm-deepseek/tests/translate.spec.ts
@@ -1,7 +1,8 @@
 import { describe, expect, it } from 'vitest'
 import { BlockAssembler, LlmError } from '@deepseek-ai/dsh-llm'
 import type { StreamChunk } from '@deepseek-ai/dsh-llm'
-import { DONE, mapFinishReason, mapUsage, translate } from '@deepseek-ai/dsh-llm-deepseek'
+import { DONE } from '../src/sse.ts'
+import { mapFinishReason, mapUsage, translate } from '../src/translate.ts'
 
 async function* feed(...payloads: (string | object)[]): AsyncGenerator<string> {
   for (const payload of payloads) {
diff --git a/packages/llm/llm-pi-ai/README.md b/packages/llm/llm-pi-ai/README.md
index 22369dc187..cb2abc8205 100644
--- a/packages/llm/llm-pi-ai/README.md
+++ b/packages/llm/llm-pi-ai/README.md
@@ -2,6 +2,8 @@
 
 Generic multi-provider adapter for the harness LLM seam backed by [`@earendil-works/pi-ai`](https://www.npmjs.com/package/@earendil-works/pi-ai). One plugin instance owns an explicit list of provider profiles; every request selects a profile with `GenerateOptions.provider` and resolves `GenerateOptions.model` dynamically from pi-ai's installed catalog.
 
+The package root exposes the Cordis plugin contract and `PiAiAdapter`; profile resolution, model construction, replay conversion, and stream conversion remain package-internal.
+
 ## Config
 
 Configure credentials and deployment-specific transport settings per provider. Omitting `apiKey` delegates authentication to pi-ai's provider-native ambient discovery. `baseURL` overrides only the endpoint of the selected catalog model, preserving its API family and compatibility metadata, so private proxies such as `https://proxy.example.com:8443` remain supported.
diff --git a/packages/llm/llm-pi-ai/src/index.ts b/packages/llm/llm-pi-ai/src/index.ts
index cbd0dcd435..ab08f21b81 100644
--- a/packages/llm/llm-pi-ai/src/index.ts
+++ b/packages/llm/llm-pi-ai/src/index.ts
@@ -27,12 +27,8 @@ import { Config, resolveProfiles } from './config.ts'
 
 export { PiAiAdapter } from './adapter.ts'
 export type { PiAiAdapterOptions } from './adapter.ts'
-export { Config, resolveProfiles } from './config.ts'
+export { Config } from './config.ts'
 export type { PiAiProviderProfile } from './config.ts'
-export { toPiContext } from './context.ts'
-export { toPiReplayState } from './replay.ts'
-export type { PiAiReplayState } from './replay.ts'
-export { mapStopReason, mapUsage, toStreamChunks } from './stream.ts'
 
 export const name = 'llm-pi-ai'
 export const inject = ['llm']
diff --git a/packages/llm/llm-pi-ai/tests/adapter.spec.ts b/packages/llm/llm-pi-ai/tests/adapter.spec.ts
index 1767447d7d..559c36bf27 100644
--- a/packages/llm/llm-pi-ai/tests/adapter.spec.ts
+++ b/packages/llm/llm-pi-ai/tests/adapter.spec.ts
@@ -4,7 +4,8 @@ import { afterEach, describe, expect, it, vi } from 'vitest'
 import { Context } from 'cordis'
 import LlmService, { LlmError, userAgent } from '@deepseek-ai/dsh-llm'
 import * as LlmPiAi from '@deepseek-ai/dsh-llm-pi-ai'
-import { PiAiAdapter, resolveProfiles } from '@deepseek-ai/dsh-llm-pi-ai'
+import { PiAiAdapter } from '@deepseek-ai/dsh-llm-pi-ai'
+import { resolveProfiles } from '../src/config.ts'
 import { assemble } from './assemble.ts'
 
 interface MockServer {
@@ -180,6 +181,18 @@ describe('PiAiAdapter provider routing', () => {
 })
 
 describe('provider profile lifecycle', () => {
+  it('keeps adapter helpers off the package root', () => {
+    for (const helper of [
+      'resolveProfiles',
+      'toPiContext',
+      'toPiReplayState',
+      'toPiAssistant',
+      'mapStopReason',
+      'mapUsage',
+      'toStreamChunks',
+    ]) expect(LlmPiAi).not.toHaveProperty(helper)
+  })
+
   it('registers every profile atomically and unregisters on dispose', async () => {
     const ctx = new Context()
     await ctx.plugin(LlmService)
diff --git a/packages/llm/llm-pi-ai/tests/convert.spec.ts b/packages/llm/llm-pi-ai/tests/convert.spec.ts
index 50955f0607..2b405c7c91 100644
--- a/packages/llm/llm-pi-ai/tests/convert.spec.ts
+++ b/packages/llm/llm-pi-ai/tests/convert.spec.ts
@@ -2,7 +2,9 @@ import { describe, expect, it } from 'vitest'
 import { CallId, LlmError } from '@deepseek-ai/dsh-llm'
 import type { ContentBlock, StreamChunk } from '@deepseek-ai/dsh-llm'
 import type { AssistantMessage, AssistantMessageEvent, Usage } from '@earendil-works/pi-ai'
-import { mapStopReason, mapUsage, toPiContext, toPiReplayState, toStreamChunks } from '@deepseek-ai/dsh-llm-pi-ai'
+import { toPiContext } from '../src/context.ts'
+import { toPiReplayState } from '../src/replay.ts'
+import { mapStopReason, mapUsage, toStreamChunks } from '../src/stream.ts'
 
 function usage(input = 0, output = 0, cacheRead = 0, cacheWrite = 0): Usage {
   return {