loop_prune_test.go — three new prune tests:
- ReadWriteReadCycle: pre-write read pruned, post-write read kept (primary invariant)
- AssistantMessagesUnaffected: only role:"tool" messages are dropped, never assistant messages
- NonExecuteCodeUnaffected: non-execute_code tool calls don't confuse the path tracker
loop_cache_test.go — one new cache test:
- IdenticalParallelReads: two goroutines simultaneously miss the cache, both execute,
results are consistent and no panic (sync.Map race safety)
cost_test.go — six computeCostUSD unit tests:
- BaseTokens, ClaudeCacheReadDiscount (10%), NonClaudeCacheReadDiscount (50%),
CacheCreationSurcharge (125%), AllFieldsCombined, UnknownModelZero
openai_encode_test.go — four OpenRouter cache injection tests:
- OpenRouterClaude_SystemCacheControl: system content encoded as array with cache_control
- OpenRouterClaude_LastToolCacheControl: last tool gets cache_control:ephemeral
- OpenRouterNonClaude_NoCacheControl: non-Claude model on openrouter gets no injection
- OpenAI_NoCacheControl: plain openai backend never injects cache_control
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Maintain a sync.Map (resultCache) across the lifetime of a run() call.
Before executing a read-safe tool (ClassifyTool returns true), check the
cache by key name+"\x00"+args. On hit, emit the cached result and skip
Exec entirely. On miss with a successful Exec, store the result. Error
results are not cached so transient failures are retried.
Tests: HitSkipsExec, DifferentArgsMiss, SerialToolNotCached,
ErrorNotCached (multi-turn sequential).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ollie
Levi Neely
Levi Neely