v1.8.2: tool loop cap-hit summary + tool call UI compaction

Old hardcoded MAX_TOOL_LOOP_DEPTH=15 replaced by per-agent
max_tool_calls (1-100, AGENTS.md frontmatter) with defaults: 30 for
read-only-only agents, 10 for agents that include any non-read-only
tool, 15 for raw chat. When the loop hits cap, fire one final summary
call with tools disabled, stream the wrap-up into the in-flight
assistant message, then insert a system sentinel with
metadata.kind='cap_hit'. The sentinel renders an amber bubble with a
Continue button (latest sentinel only) that POSTs to a new
/api/chats/:id/continue route to extend. Hard ceiling: 3 cap-hits per
chat (2 continues max) — third sentinel reports can_continue=false.

Error frames carry a machine-readable reason code alongside human
error text. Failed messages persist the reason via
metadata.kind='error' so the bubble renders specifics on reload (WS
error frame is one-shot).

Tool call UI rewired: ToolCallLine renders inline (↳ name args
spinner/check/✗, expand-on-tap for args+result); ToolCallGroup
collapses 3+ consecutive same-tool runs into a compact card.
MessageList owns a three-pass pre-render (flatten + fold tool
results onto matching runs by id + group same-tool runs + number
sentinels). MessageBubble drops tool rendering and adds the
sentinel / error-reason branches. ToolCallCard deleted.

Roadmap follow-up logged: add explicit max_tool_calls: 30 to the 6
agents in /data/AGENTS.md and /opt/boocode/AGENTS.md post-ship for
discoverability (defaults handle behavior identically).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/server/src/services/agents.ts

@@ -29,6 +29,9 @@ interface ParsedFrontmatter {
   tools?: string[];
   description?: string;
   model?: string;
+  // v1.8.2: optional per-agent tool-loop budget. Absent → inference resolves
+  // from the agent's toolset at runtime.
+  max_tool_calls?: number;
 }
 
 function stripQuotes(s: string): string {
@@ -89,6 +92,21 @@ function parseFrontmatter(yaml: string): { data: ParsedFrontmatter; errors: stri
       data.description = stripQuotes(valueRaw);
     } else if (key === 'model') {
       data.model = stripQuotes(valueRaw);
+    } else if (key === 'max_tool_calls') {
+      // v1.8.2: 1..100 inclusive integer. Out-of-range values are skipped
+      // with a warning rather than throwing — agents shouldn't be unusable
+      // because of a typo on a defaulted field. Non-numeric or non-integer
+      // still hard-fails the block, matching `temperature` behavior.
+      const n = Number(valueRaw);
+      if (Number.isInteger(n) && n >= 1 && n <= 100) {
+        data.max_tool_calls = n;
+      } else if (Number.isInteger(n)) {
+        console.warn(
+          `agents: max_tool_calls ${n} out of range 1-100, ignoring (falling back to default)`,
+        );
+      } else {
+        errors.push(`max_tool_calls must be an integer 1-100 (got "${valueRaw}")`);
+      }
     }
     // Unknown keys silently ignored — forward-compat.
   }
@@ -177,6 +195,7 @@ function parseAgentSection(section: RawSection): Omit<Agent, 'source'> {
     temperature: typeof fm.temperature === 'number' ? fm.temperature : DEFAULT_TEMPERATURE,
     tools: filteredTools,
     model: typeof fm.model === 'string' && fm.model.length > 0 ? fm.model : null,
+    max_tool_calls: typeof fm.max_tool_calls === 'number' ? fm.max_tool_calls : null,
   };
 }