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* keep idle workers alive: bump_idle_ttl + KeepAlive heartbeatblasty13 days1-0/+79
| | | | | | | | | | | | | | | | Root cause: idalib workers run an idle watchdog (worker_lifecycle.py) that self-exits after idle_ttl_sec (default 600s) of no requests -- deliberate resource hygiene for a shared/ephemeral supervisor, wrong for an interactive TUI. CLI-opened startup binary always gets 600s (no flag). Fix (both verified against a 12s-TTL session): - IDAClient.bump_idle_ttl(1e9): re-open (idempotent) re-applies TTL, no upper cap -> effectively immortal. Primary fix, call once at startup. - IDAClient.keepalive()/KeepAlive: background server_health heartbeat resets the watchdog; covers adopted sessions too. Safety net. tests/test_keepalive.py: 4/4 (heartbeat + bump both keep a short-TTL worker alive past 2x TTL). docs updated with why + fix.
* harden client: transparent session auto-recovery + stress suiteblasty13 days1-11/+47
| | | | | | | | | | | - auto-recover stale db ("Session not found" after server restart): drop pin, re-resolve sole session, retry once. Only when db was auto-injected; never silently switches an explicitly-pinned db (auto_recover_session gate). - tests/serverctl.sh: start/stop/kill9/ready control over spawn.sh - tests/stress_client.py: 6 adversarial scenarios, 24 assertions: dead-port fail-fast, tight-timeout recovery, worker crash, full restart (naive auto-recovery + no-autoswitch), 300/16 concurrency, kill-under-churn. All clean: no hangs, no deadlocks, no non-IDAError leaks.
* persistent MCP client: warm handshake, keep-alive pool, error taxonomy, ↵blasty13 days1-0/+563
thread-safe - IDAClient: single handshake, ~7ms warm calls (vs ~60ms cold CLI) - keep-alive connection pool over http.client; concurrent-safe (40 threads OK) - grounded error taxonomy: IDAToolError on isError, soft per-item errors as data - session-expiry recovery (404 -> re-handshake -> retry), bounded transport retries - auto db-injection + resolve_db (ignores stale empty-id sessions) - live smoke test: 13/13 pass