diff --git a/src/app/sessions.ts b/src/app/sessions.ts
index 1acaf68..67e334f 100644
--- a/src/app/sessions.ts
+++ b/src/app/sessions.ts
@@ -54,13 +54,17 @@ declare module '@deepseek-ai/cordis' {
 }
 /**
  * The DSH tools an Executor Session works with: files, search, the shell and its jobs, the web, skills, its todo list and
- * subagents. It gets no other tool the profile has, whenever it was registered: none that asks or shows a person something,
- * changes the profile, schedules work or starts goals outside the worker slots, the pause and a person's hold, starts or
- * messages other Sessions, or edits documents.
+ * subagents, and the context-management tools of an attached context-management plugin when the profile has one, so a
+ * long worker can compress consumed history. It gets no other tool the profile has, whenever it was registered: none that
+ * asks or shows a person something, changes the profile, schedules work or starts goals outside the worker slots, the pause
+ * and a person's hold, starts or messages other Sessions, or edits documents.
  */
 export const SHELL_TOOL = process.platform === 'win32' ? 'pwsh' : 'bash'
+/** Context-management tools of an attached context-management plugin, present only when the profile has one. */
+const CONTEXT_TOOLS = ['compress', 'decompress', 'search_context', 'acp_status', 'acp_cache']
 const WORK_TOOLS = ['read', 'write', 'edit', 'read_image', 'glob', 'grep', SHELL_TOOL, 'job_output', 'job_list', 'job_kill', 'web_search',
-  'web_fetch', 'skill', 'todo_write', 'subagent', 'list_subagent_models', 'send_message', 'list_agents', 'interrupt_agent']
+  'web_fetch', 'skill', 'todo_write', 'subagent', 'list_subagent_models', 'send_message', 'list_agents', 'interrupt_agent',
+  ...CONTEXT_TOOLS]
 /** What the main Session is told when it would wait: what it waits for comes to it, and a waiting step holds back the next. */
 const NO_WAIT = 'Reports, follow_up notices, new candidates and a background job\'s end with its output arrive by themselves as messages; '
   + 'end the turn instead of waiting for them.'
@@ -272,7 +276,8 @@ export class Sessions {
     const register = this.registerTool(agent, binding)
     for (const tool of host.tools(agent, ticket)) register(tool.name, tool.description, tool.schema, tool.execute)
     if (master) {
-      binding.disposers.push(agent.ctx.tools.restrict({ allow: ['skill', SHELL_TOOL, 'read', 'read_image', 'job_output', 'job_list', 'job_kill'] }),
+      binding.disposers.push(agent.ctx.tools.restrict({ allow: ['skill', SHELL_TOOL, 'read', 'read_image', 'job_output', 'job_list', 'job_kill',
+        ...CONTEXT_TOOLS].filter(name => agent.ctx.tools.get(name, scopeParentOf(agent))) }),
         agent.ctx.tools.guard(execution => noWait(execution, () => this.routed(agent))))
     } else {
       // An Executor Session keeps the profile's work tools it has, which DSH requires to be known; its own tools are not masked.