agent_discovery: cache resolved agent location to skip re-discovery on repeat sends#174
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weishi-imbue wants to merge 3 commits into
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agent_discovery: cache resolved agent location to skip re-discovery on repeat sends#174weishi-imbue wants to merge 3 commits into
weishi-imbue wants to merge 3 commits into
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…n repeat sends send_message resolved its target via a full mngr discovery (find_all_agents) on every call. Cache each agent's resolved AgentMatch by name and feed it straight to mngr's pre-resolved agents_to_message API, so repeat messages to the same agent skip discovery and go to the known host. On a stale cache hit (the send reaches no agent -- destroyed, recreated, or moved hosts) the entry is dropped and the agent is re-resolved, preserving correctness. A name resolving to multiple agents is never cached, preserving the existing "message all matches" behavior. STOPPED agents are still auto-started (is_start_desired=True) regardless of cache state. The resolver/sender are injected as MutableModel callables so the cache and stale-fallback orchestration is unit-tested without monkeypatching the mngr API. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reworks the caching from the previous commit to follow existing precedents instead of bespoke machinery (per review feedback): - Cache is now a plain module-level dict (_AGENT_LOCATION_CACHE), like mngr's own get_provider_instance _instance_cache, instead of an _AgentMatchCache class. No lock: dict get/set/pop are individually atomic and the compound race is benign for a best-effort cache (mngr's cache is unlocked for the same reason). - Drops the _AgentResolver/_AgentSender MutableModel __call__ wrappers, which only existed to bind mngr_ctx without a closure/partial. The resolve/send seam now follows welcome_resend.py's idiom: typed Callable aliases injected as defaulted parameters on one orchestration helper (_send_message_to_agent), defaulting to plain module-level functions (_resolve_agent/_send_to_agents). - send_message stays a thin wrapper -- _send_message_to_agent(name, msg, mngr_ctx) -- with no global passed in and no wrapper objects constructed. Tests use plain inline def fakes (inline functions are allowed in test files; the ratchet excludes them) instead of MutableModel stubs, plus a real-but-cheap MngrContext fixture (empty MNGR_PROJECT_CONFIG_DIR so no config files load under mngr's pytest guard). Behavior unchanged; 11 unit tests pass, ty/ruff/ratchets clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…ent docstring The docstring described the prod code's current behavior plus a note that resolve/send "are injected in tests" -- prod docstrings shouldn't narrate the test setup. The defaulted Callable params are self-evident from the signature. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
agent_discovery.send_messageran a full mngr discovery (find_all_agents) on every message. This caches each agent's resolvedAgentMatchby name and sends straight to the known host on repeat messages, leveraging mngr's pre-resolvedagents_to_messageAPI. The agent lookup now happens once per agent instead of once per message.How it works
find_all_agents, cache the location.AgentMatch— no discovery.MessageResult.successful_agents(errors are collected, not raised, underErrorBehavior.CONTINUE).is_start_desired=True) on both paths.The cache is thread-safe (the sync send endpoint runs in FastAPI's threadpool). The resolver/sender are injected as
MutableModelcallables so the cache + stale-fallback orchestration is unit-tested without monkeypatching the mngr API.What this does NOT do (yet)
send_messagestill builds a freshMngrContextper call (_get_mngr_context→load_config), so a cache hit skips the multi-provider discovery scan but still pays config load + one host-scopedget_agents(). Reusing a long-lived context (warm provider cache; also fixes the per-call provider-instance accumulation in mngr'sget_provider_instance) is the natural follow-up.Tests
agent_discovery_test.py→ 12 passed.tyclean; ruff clean; ratchets pass (the lone localtest_no_type_errorsfailure is a pre-existing environment issue that fails identically onmain).server_test+welcome_resend_test→ 57 passed.Draft for iteration.
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