diff --git a/packages/context/tmux-context/tests/fixtures/tmux-context-driver.ts b/packages/context/tmux-context/tests/fixtures/tmux-context-driver.ts
new file mode 100644
index 0000000000..45a8aa147a
--- /dev/null
+++ b/packages/context/tmux-context/tests/fixtures/tmux-context-driver.ts
@@ -0,0 +1,17 @@
+#!/usr/bin/env node
+/** Test driver that sends two turns through one Headless Loader composition. */
+/* eslint-disable @typescript-eslint/no-unsafe-call */
+
+import { boot, resolveConfigPath } from '@deepseek-ai/dsh-app-boot'
+import { runOneShot } from '@deepseek-ai/dsh-cli-demo/src/cli.ts'
+
+const configPath = process.argv[2]
+if (configPath === undefined) throw new Error('tmux-context driver requires a config path')
+
+const ctx = await boot('tmux-context-e2e', resolveConfigPath(configPath, undefined))
+try {
+  await runOneShot(ctx, { task: 'first' })
+  await runOneShot(ctx, { task: 'second' })
+} finally {
+  await ctx.fiber.dispose()
+}
diff --git a/packages/context/tmux-context/tests/fixtures/tmux-context-mock-bash.ts b/packages/context/tmux-context/tests/fixtures/tmux-context-mock-bash.ts
new file mode 100644
index 0000000000..3e9540abff
--- /dev/null
+++ b/packages/context/tmux-context/tests/fixtures/tmux-context-mock-bash.ts
@@ -0,0 +1,46 @@
+import type { Context } from 'cordis'
+import { BashExecutor } from '@deepseek-ai/dsh-bash'
+import type { BashExecRequest, BashExecSpec, BashProcess, BashRunResult } from '@deepseek-ai/dsh-bash'
+
+/**
+ * Deterministic `ctx.bash` for the tmux-context Loader fixture: any command
+ * (the plugin's `tmux display-message`) returns a fixed tab-delimited reading,
+ * so the injected tmux location is stable without a real tmux server. `start()`
+ * throws — tmux-context must never spawn a background process.
+ */
+class TmuxMockBash extends BashExecutor {
+  override resolve(request: BashExecRequest): BashExecSpec {
+    return {
+      command: request.command,
+      workdir: request.workdir ?? process.cwd(),
+      timeoutMs: request.timeoutMs ?? 60_000,
+      stdoutMaxBytes: request.stdoutMaxBytes ?? 64_000,
+      signal: request.signal,
+      sandboxPolicy: request.sandboxPolicy,
+    }
+  }
+
+  override run(_spec: BashExecSpec): Promise<BashRunResult> {
+    const line = ['work', '0', 'editor', '1', '%3', '1', '1', 'a1b2,80x24,0,0,4'].join('\\t')
+    return Promise.resolve({
+      exitCode: 0,
+      signal: null,
+      timedOut: false,
+      aborted: false,
+      timeoutMs: 60_000,
+      stdout: { text: `${line}\n`, truncated: false },
+      stderr: { text: '', truncated: false },
+    })
+  }
+
+  override start(): BashProcess {
+    throw new Error('tmux-context must never start a background task')
+  }
+}
+
+export const name = 'tmux-context-mock-bash'
+
+/** Register the deterministic `ctx.bash` executor for the fixture. */
+export function apply(ctx: Context): void {
+  ctx.plugin(TmuxMockBash)
+}
diff --git a/packages/context/tmux-context/tests/fixtures/tmux-context-mock-llm.ts b/packages/context/tmux-context/tests/fixtures/tmux-context-mock-llm.ts
new file mode 100644
index 0000000000..2f6c7a6408
--- /dev/null
+++ b/packages/context/tmux-context/tests/fixtures/tmux-context-mock-llm.ts
@@ -0,0 +1,22 @@
+import type { Context } from 'cordis'
+import { LlmAdapter, type StreamChunk } from '@deepseek-ai/dsh-llm'
+
+/** Deterministic one-step adapter for the tmux-context Loader fixture. */
+class TmuxContextMockAdapter extends LlmAdapter {
+  async * stream(): AsyncIterable<StreamChunk> {
+    const text = 'tmux context sampled'
+    yield { type: 'block-start', index: 0, blockType: 'text' }
+    yield { type: 'text-delta', index: 0, text }
+    yield { type: 'block-end', index: 0, block: { type: 'text', text } }
+    yield { type: 'usage', usage: { inputTokens: 1, outputTokens: 1 } }
+    yield { type: 'finish', reason: { kind: 'stop' } }
+  }
+}
+
+export const name = 'tmux-context-mock-llm'
+export const inject = ['llm']
+
+/** Register the test-only `tmux-context-mock` adapter. */
+export function apply(ctx: Context): void {
+  ctx.llm.registerAdapter(['tmux-context-mock'], new TmuxContextMockAdapter())
+}
diff --git a/packages/context/tmux-context/tests/fixtures/tmux-context.cordis.yml b/packages/context/tmux-context/tests/fixtures/tmux-context.cordis.yml
new file mode 100644
index 0000000000..419922a0e3
--- /dev/null
+++ b/packages/context/tmux-context/tests/fixtures/tmux-context.cordis.yml
@@ -0,0 +1,21 @@
+# Test-only composition: keep tmux-context opt-in while exercising its real Loader/app path.
+# A deterministic mock ctx.bash returns a fixed tmux reading, so the injected location
+# is stable without a real tmux server on the test host.
+- id: tmux-context-mock-llm
+  name: './tmux-context-mock-llm.ts'
+
+- id: bash
+  name: './tmux-context-mock-bash.ts'
+
+- id: tmux-context
+  name: '@deepseek-ai/dsh-tmux-context'
+
+- id: cli-agent
+  name: '@deepseek-ai/dsh-cli-demo'
+  config:
+    provider: tmux-context-mock
+    model: tmux-context-mock
+    persona: 'Test the tmux-context plugin.'
+    persistenceRoot: './.sessions'
+    persistenceCompression: 'none'
+    workspaceContext: false
diff --git a/packages/context/tmux-context/tests/tmux-context.e2e.ts b/packages/context/tmux-context/tests/tmux-context.e2e.ts
index 06e3c1f3f5..386a326624 100644
--- a/packages/context/tmux-context/tests/tmux-context.e2e.ts
+++ b/packages/context/tmux-context/tests/tmux-context.e2e.ts
@@ -5,16 +5,8 @@ import { describe, expect, it } from 'vitest'
 import { type SessionEvent } from '@deepseek-ai/dsh-session'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
 
-// Keep the Loader config under examples so both modes exercise the same deployable
-// topology: local fixture source plus bare plugins owned by the examples workspace.
-const driver = fileURLToPath(new URL(
-  '../../../../examples/headless-agent/tests/fixtures/tmux-context-driver.ts',
-  import.meta.url,
-))
-const configPath = fileURLToPath(new URL(
-  '../../../../examples/headless-agent/tests/fixtures/tmux-context.cordis.yml',
-  import.meta.url,
-))
+const driver = fileURLToPath(new URL('./fixtures/tmux-context-driver.ts', import.meta.url))
+const configPath = fileURLToPath(new URL('./fixtures/tmux-context.cordis.yml', import.meta.url))
 const repoTsconfig = fileURLToPath(new URL('../../../../tsconfig.json', import.meta.url))
 
 async function jsonlFiles(dir: string): Promise<string[]> {