diff --git a/SYSTEM_PROMPT.md b/SYSTEM_PROMPT.md
index 489104db..64ed8555 100644
--- a/SYSTEM_PROMPT.md
+++ b/SYSTEM_PROMPT.md
@@ -121,9 +121,8 @@ currency signs, for example `\$10`.
 
 ## Skills
 
-Available native OpenResearch skills:
-
-{skill_names}
+Native OpenResearch skills start with `orx-`. Prioritize these skills for
+OpenResearch workflows.
 
 Use the available OpenResearch skills whenever their descriptions match the user
 task; the skills provide instructions on how to use relevant CLI commands and
diff --git a/src/commands/up.rs b/src/commands/up.rs
index 119e839e..854f5e11 100644
--- a/src/commands/up.rs
+++ b/src/commands/up.rs
@@ -8370,7 +8370,11 @@ async fn set_chat_configuration(
                 .ok_or_else(|| not_found("project"))?;
             let session_id = id.clone();
             let (cwd, _) = tokio::task::spawn_blocking(move || {
-                local::opencode::ensure_playbook(&project, &session_id, None)
+                local::opencode::ensure_playbook(
+                    &project,
+                    &session_id,
+                    Some(local::harness::acp::SESSION_SKILLS_DIR),
+                )
             })
             .await
             .map_err(bad_request)?
diff --git a/src/local/harness/acp.rs b/src/local/harness/acp.rs
index 1514b7d8..44eaae19 100644
--- a/src/local/harness/acp.rs
+++ b/src/local/harness/acp.rs
@@ -20,6 +20,8 @@ use crate::store::Store;
 
 mod auth;
 
+pub(crate) const SESSION_SKILLS_DIR: &str = ".agents/skills";
+
 static DISCOVERY_SLOTS: tokio::sync::Semaphore = tokio::sync::Semaphore::const_new(2);
 
 pub struct Acp(pub Definition);
@@ -71,6 +73,10 @@ impl Harness for Acp {
         true
     }
 
+    fn session_skills_dir(&self) -> Option<&'static str> {
+        Some(SESSION_SKILLS_DIR)
+    }
+
     async fn detect_snapshot(&self) -> Option<HarnessInfo> {
         Some(self.detection())
     }
@@ -197,7 +203,7 @@ async fn run_turn(ctx: &mut TurnCtx, definition: &Definition) -> Result<()> {
     let project = ctx.project.clone();
     let session_id = ctx.session_id.clone();
     let (cwd, _) = tokio::task::spawn_blocking(move || {
-        crate::local::opencode::ensure_playbook(&project, &session_id, None)
+        crate::local::opencode::ensure_playbook(&project, &session_id, Some(SESSION_SKILLS_DIR))
     })
     .await??;
     let host = ctx.host.acp.clone();
diff --git a/src/local/opencode.rs b/src/local/opencode.rs
index e06c3602..5ef52ede 100644
--- a/src/local/opencode.rs
+++ b/src/local/opencode.rs
@@ -237,11 +237,6 @@ fn playbook_md(project: &LocalProject, state: &ProjectState) -> String {
          {compute_default_source}; load **`orx-compute`** and read `orx compute instructions show` before configuring or launching"
     );
     let project_state = project_state_md(project, state);
-    let skill_names = super::agent_skills::skills(super::agent_skills::SkillSet::Local)
-        .iter()
-        .map(|skill| format!("- `{}`: {}", skill.name, skill.description))
-        .collect::<Vec<_>>()
-        .join("\n");
     let template = SYSTEM_PROMPT
         .split_once("-->\n\n")
         .map(|(_, rest)| rest)
@@ -254,7 +249,6 @@ fn playbook_md(project: &LocalProject, state: &ProjectState) -> String {
         .replace("{compute_bullet}", &compute_bullet)
         .replace("{artifacts}", &artifacts)
         .replace("{project_state}", &project_state)
-        .replace("{skill_names}", &skill_names)
 }
 
 /// Keep the files we drop into the checkout out of `git status` / accidental
@@ -1413,9 +1407,10 @@ mod tests {
         assert!(md.contains("Use the available OpenResearch skills"));
         assert!(md.contains("execute important user flows"));
         assert!(!md.contains("orx skill <name>"));
-        // Native catalogs may abbreviate descriptions; preserve routing context here.
+        assert!(md.contains("Native OpenResearch skills start with `orx-`"));
+        assert!(md.contains("Load the relevant skill before acting"));
         for skill in agent_skills::skills(SkillSet::Local) {
-            assert!(md.contains(&format!("- `{}`: {}", skill.name, skill.description)));
+            assert!(!md.contains(&format!("- `{}`:", skill.name)));
         }
         assert!(md.contains("orx-compute"));
         assert!(md.contains("helping the user across the research process"));
@@ -1434,7 +1429,6 @@ mod tests {
         let md = playbook_md(&project, &ProjectState::default());
         assert!(md.contains("default target"));
         assert!(md.contains("orx-compute"));
-        assert!(md.contains("orx-instances"));
         assert!(!md.contains("## Cardinal rules"));
         assert!(!md.contains("## Command index"));
         assert!(!md.contains("## The auto-research loop"));