chore: updated claude-progress.txt

Signed-off-by: Matej Vašek <matejvasek@gmail.com>

Author: matejvasek

docs/claude-progress.txt

@@ -1,6 +1,15 @@
 # Claude Progress Log
 # Newest entries first. Agents: append your entry at the top after the header.
 
+---
+## 2026-05-18 | Session: Error server and JSON error responses
+Worked on: Errserver for failed Go compilation, JSON error responses for backend
+Completed:
+- Error server (backend/cmd/errserver): on Go build failure, the file watcher starts errserver which returns HTTP 500 with compilation error as JSON {"message": "..."}
+- OCP console's appFetch parses json.message automatically, so the UI shows actual compiler output instead of generic "Internal Server Error"
+Left off: Branch improve-test-cluster, PR #25 open. Backend JSON error response not yet pushed.
+Blockers: None
+
 ---
 ## 2026-05-15 | Session: Better testing server setup (init.sh)
 Worked on: Improve init.sh with PID files, port randomization, Go auto-recompile, agent docs
@@ -15,7 +24,7 @@ Completed:
 - Agent docs (AGENTS.md, WORKFLOW.md, init-session) reference .dev-env.json and .dev-logs/
 - Design spec and implementation plan written
 - 13 suites, 112 tests, all passing
-Left off: Branch improve-test-cluster, ready to push. Feature not yet marked as passes:true (needs manual testing confirmation).
+Left off: Branch improve-test-cluster, PR #25 open.
 Blockers: None
 
 ---