Fix opencode-local adapter: parser, UI, CLI, and environment tests

- Move costUsd to top-level return field in parseOpenCodeJsonl (out of usage)
- Fix session-not-found regex to match "Session not found" pattern
- Use callID for toolUseId in UI stdout parser, add status/metadata header
- Fix CLI formatter: separate tool_call/tool_result lines, split step_finish
- Enable createIfMissing for cwd validation in environment tests
- Add empty OPENAI_API_KEY override detection
- Classify ProviderModelNotFoundError as warning during model discovery
- Make model discovery best-effort when no model is configured

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/adapters/opencode-local/src/server/parse.ts

@@ -27,8 +27,8 @@ export function parseOpenCodeJsonl(stdout: string) {
     inputTokens: 0,
     cachedInputTokens: 0,
     outputTokens: 0,
-    costUsd: 0,
   };
+  let costUsd = 0;
 
   for (const rawLine of stdout.split(/\r?\n/)) {
     const line = rawLine.trim();
@@ -56,7 +56,7 @@ export function parseOpenCodeJsonl(stdout: string) {
       usage.inputTokens += asNumber(tokens.input, 0);
       usage.cachedInputTokens += asNumber(cache.read, 0);
       usage.outputTokens += asNumber(tokens.output, 0) + asNumber(tokens.reasoning, 0);
-      usage.costUsd += asNumber(part.cost, 0);
+      costUsd += asNumber(part.cost, 0);
       continue;
     }
 
@@ -81,6 +81,7 @@ export function parseOpenCodeJsonl(stdout: string) {
     sessionId,
     summary: messages.join("\n\n").trim(),
     usage,
+    costUsd,
     errorMessage: errors.length > 0 ? errors.join("\n") : null,
   };
 }
@@ -92,7 +93,7 @@ export function isOpenCodeUnknownSessionError(stdout: string, stderr: string): b
     .filter(Boolean)
     .join("\n");
 
-  return /unknown\s+session|session\s+.*\s+not\s+found|resource\s+not\s+found:.*[\\/]session[\\/].*\.json|notfounderror|no session/i.test(
+  return /unknown\s+session|session\b.*\bnot\s+found|resource\s+not\s+found:.*[\\/]session[\\/].*\.json|notfounderror|no session/i.test(
     haystack,
   );
 }