feat: Support token caching to reduce LLM costs in Anthropic models (not typically handled automatically by APIs)

assets/config-template.yaml

@@ -240,7 +240,10 @@ theme: null                      # null = the built-in dark theme; set to `light
 left_prompt: null                # If null, uses the built-in default:
                                  #   '{color.red}{model}){color.green}{?session {?agent {agent}>}{session}{?role /}}{!session {?agent {agent}>}}{role}{?rag @{rag}}{color.cyan}{?session )}{!session >}{color.reset} '
 right_prompt: null               # If null, uses the built-in default:
-                                 #   '{color.cyan}{?reasoning_effort [{reasoning_effort}] }{color.purple}{?session {?consume_tokens {consume_tokens}({consume_percent}%)}{!consume_tokens {consume_tokens}}}{color.reset}'
+                                 #   '{color.cyan}{?reasoning_effort [{reasoning_effort}] }{color.purple}{?last_cache_read_tokens ⚡{last_cache_read_tokens} }{?session {?consume_tokens {consume_tokens}({consume_percent}%)}{!consume_tokens {consume_tokens}}}{color.reset}'
+                                 # Token-usage variables (set only when the provider reports usage, so guard them with {?var ...}):
+                                 #   last_input_tokens, last_output_tokens, last_cache_read_tokens, last_cache_creation_tokens (most recent API call)
+                                 #   total_input_tokens, total_output_tokens, total_cache_read_tokens, total_cache_creation_tokens (session cumulative)
 
 # ---- Miscellaneous ----
 user_agent: null                 # Set User-Agent HTTP header, use `auto` for coyote/<current-version>
@@ -282,4 +285,7 @@ sync_models_ttl_hours: 24        # Hours before the synced model catalog is cons
 #     proxy: socks5://127.0.0.1:1080                # Set proxy
 #     connect_timeout: 10                           # Set timeout in seconds for connect to api
 #     read_timeout: 300                             # Set timeout in seconds for a read stall (no bytes received); 0 disables (default: 300)
+#
+# The claude, bedrock, and vertexai clients also support:
+#   prompt_cache: true                              # Enable Anthropic prompt caching (default: true)
 __CLIENTS_BLOCK__