hermes-agent/tui_gateway
alt-glitch 93d6e73028 fix(mcp): expose late-connecting MCP tools to the agent (TUI/CLI/gateway)
MCP servers that connect after the agent's one-time tool snapshot were
invisible for the whole session. Two root causes, fixed together:

1. The startup discovery wait was a flat 0.75s. HTTP/OAuth servers
   commonly take 2-6s on a cold connect, so they missed the window and
   their tools never entered the agent's snapshot. `thread.join(timeout)`
   already returns the instant discovery completes, so raising the bound
   costs ~0s for the common case (no MCP / fast servers) and only ever
   blocks for a genuinely-pending server, capped so a dead server can't
   freeze startup. The bound is now configurable via
   `mcp_discovery_timeout` (config.yaml, default 5.0s).

2. Three call sites duplicated the agent tool-snapshot rebuild (the TUI
   `reload.mcp` RPC, the gateway reload, and the TUI late-binding refresh
   thread), and the late-refresh detected changes by tool COUNT — missing
   an equal-size add/remove swap. Consolidated into one shared
   `tools.mcp_tool.refresh_agent_mcp_tools(agent)` helper that diffs by
   tool NAME, mutates the agent under a lock (thread-safe), and respects
   the agent's own enabled/disabled toolsets.

The late-binding refresh keeps its pre-first-turn cache-safety guard:
it never rebuilds the tool list once a turn has started, so the cached
prompt prefix is never invalidated mid-conversation.

Tests: new tests/tools/test_refresh_agent_mcp_tools.py covers the
name-based diff, in-place mutation, agent-scoped filtering, thread
safety, and the config-driven discovery bound (incl. instant-return
when nothing is pending). 75 passed across the touched areas.
2026-06-19 11:57:43 -07:00
..
__init__.py feat: new tui based on ink 2026-04-02 19:07:53 -05:00
entry.py fix(mcp): expose late-connecting MCP tools to the agent (TUI/CLI/gateway) 2026-06-19 11:57:43 -07:00
event_publisher.py chore: address copilot comments 2026-04-24 12:51:04 -04:00
render.py tui: inherit Python-side rendering via gateway bridge 2026-04-05 18:50:41 -05:00
server.py fix(mcp): expose late-connecting MCP tools to the agent (TUI/CLI/gateway) 2026-06-19 11:57:43 -07:00
slash_worker.py fix(tui-gateway): reap leaked slash_worker sessions on disconnect + active_list liveness (re-scoped onto current main) 2026-06-08 10:02:05 -07:00
transport.py fix(tui-gateway): harden stdio transport against half-closed pipes + SIGTERM races (#17118) 2026-04-28 17:54:06 -05:00
ws.py feat(desktop): composer status stack, live subagent windows, editable prompts (#44630) 2026-06-12 08:30:06 -05:00