feat: Add skill discovery, loading, and invocation (#3444)

Adds a skills system that lets users define reusable LLM instructions as `SKILL.md` files with YAML frontmatter.

1 files changed, 14 insertions, 0 deletions

diff --git a/crates/atuin-ai/src/tui/view/turn.rs b/crates/atuin-ai/src/tui/view/turn.rs
index 98ae5eff..9f4460eb 100644
--- a/crates/atuin-ai/src/tui/view/turn.rs
+++ b/crates/atuin-ai/src/tui/view/turn.rs
@@ -151,6 +151,8 @@ pub(crate) enum ToolRenderData {
         query: String,
         filter_modes: Vec<HistorySearchFilterMode>,
     },
+    /// Skill loading — read-only, auto-approved.
+    SkillLoad { _name: String },
     /// Server-side tool — no client rendering data available.
     Remote,
 }
@@ -257,6 +259,15 @@ impl<'a> TurnBuilder<'a> {
             ConversationEvent::SystemContext { .. } => {
                 // Not rendered in the TUI — only sent to the API
             }
+            ConversationEvent::SkillInvocation {
+                name, arguments, ..
+            } => {
+                let display = match arguments {
+                    Some(args) => format!("/{name} {args}"),
+                    None => format!("/{name}"),
+                };
+                self.add_user_message(&display);
+            }
         }
     }
 
@@ -459,6 +470,9 @@ impl<'a> TurnBuilder<'a> {
                     query: history.query.clone(),
                     filter_modes: history.filter_modes.clone(),
                 },
+                ClientToolCall::LoadSkill(skill) => ToolRenderData::SkillLoad {
+                    _name: skill.name.clone(),
+                },
             }
         } else {
             // Not in tracker → server-side tool