story-kit: merge 301_story_dedicated_token_usage_page_in_web_ui

server/src/http/agents.rs

@@ -130,6 +130,26 @@ struct TokenCostResponse {
     agents: Vec<AgentCostEntry>,
 }
 
+/// A single token usage record in the all-usage response.
+#[derive(Object, Serialize)]
+struct TokenUsageRecordResponse {
+    story_id: String,
+    agent_name: String,
+    model: Option<String>,
+    timestamp: String,
+    input_tokens: u64,
+    output_tokens: u64,
+    cache_creation_input_tokens: u64,
+    cache_read_input_tokens: u64,
+    total_cost_usd: f64,
+}
+
+/// Response for the all token usage endpoint.
+#[derive(Object, Serialize)]
+struct AllTokenUsageResponse {
+    records: Vec<TokenUsageRecordResponse>,
+}
+
 /// Returns true if the story file exists in `work/5_done/` or `work/6_archived/`.
 ///
 /// Used to exclude agents for already-archived stories from the `list_agents`
@@ -532,6 +552,42 @@ impl AgentsApi {
             agents,
         }))
     }
+
+    /// Get all token usage records across all stories.
+    ///
+    /// Returns the full history from the persistent token_usage.jsonl log.
+    #[oai(path = "/token-usage", method = "get")]
+    async fn get_all_token_usage(
+        &self,
+    ) -> OpenApiResult<Json<AllTokenUsageResponse>> {
+        let project_root = self
+            .ctx
+            .agents
+            .get_project_root(&self.ctx.state)
+            .map_err(bad_request)?;
+
+        let records = crate::agents::token_usage::read_all(&project_root)
+            .map_err(|e| bad_request(format!("Failed to read token usage: {e}")))?;
+
+        let response_records: Vec<TokenUsageRecordResponse> = records
+            .into_iter()
+            .map(|r| TokenUsageRecordResponse {
+                story_id: r.story_id,
+                agent_name: r.agent_name,
+                model: r.model,
+                timestamp: r.timestamp,
+                input_tokens: r.usage.input_tokens,
+                output_tokens: r.usage.output_tokens,
+                cache_creation_input_tokens: r.usage.cache_creation_input_tokens,
+                cache_read_input_tokens: r.usage.cache_read_input_tokens,
+                total_cost_usd: r.usage.total_cost_usd,
+            })
+            .collect();
+
+        Ok(Json(AllTokenUsageResponse {
+            records: response_records,
+        }))
+    }
 }
 
 #[cfg(test)]