- root derived session ID in rolling prefix key to disambiguate conversations with different system prompts
- sanitize matcher config to guarantee MaxPrefixes >= MaxTurns
- tie-break tool parts sorting with digest for determinism
- replace O(N log N) sorting under global write lock with container/list LRU eviction
- track primary alias groups for O(1) group lookup and clean group eviction
- capture timestamps inside lock and add nil receiver guards
Remove gemini-3-flash-agent and legacy gemini-3.5-flash entries from the embedded antigravity model registry in models.json, as upstream Google Cloud Code / Antigravity endpoints return 500 UNKNOWN for these model IDs. Update excluded model tests to assert against active model gemini-pro-agent instead.
- Extract subagent IDs, user IDs, and prompt cache keys from nested `request` objects across session identity, session info, and auth selection.
- Normalize and fall back appropriately when top-level prompt cache key fields are empty strings.
- Inspect nested request fields when validating explicit session identities.
- Introduce `HTTPStatusError` to retain upstream HTTP status codes across Antigravity OAuth and project lookup calls.
- Propagate status codes and retry-after metadata from cause errors in `missingAntigravityProjectIDError`.
Closes: #5368
- Attach candidate upstream errors as causes to scheduler availability and cooldown errors.
- Introduce `errorWithCause` wrapper to extract and display upstream error summaries.
- Enrich auth selection error messages with upstream details and preserve model cooldown errors.
- Forward `Retry-After` response headers for model cooldown errors in Claude Code handler.
Closes: #5365
- Prevent subagent sessions from inheriting parent credentials on Antigravity and Gemini providers and models to mitigate concurrency rate limiting.
- Avoid aliasing subagent session keys to parent fallback keys or mutating parent bindings during subagent result handling.
Closes: #5364
- Preserve pending tool use IDs across message-level system reminders to maintain tool call and result alignment.
- Merge adjacent Gemini request contents for consecutive user and system reminder turns.
- Relax tool response reordering condition and preserve non-response parts in Antigravity executor.
- Align tool results and buffer pending system reminders in OpenAI translator.
Closes: #5354
- Inject test-scoped minPollInterval into XAIAuth to avoid multi-second physical sleeps during device-flow polling tests
- Add TestXAIAuthDefaultPollInterval regression test to verify default production interval remains 5s
- Introduce testOperationTimeout to home Client so mock test clients consistently use short 50ms timeouts
- Fix malformed RESP bulk string length for GET config mock response in TestRunConfigSubscriberLifetimeRejectsInvalidSubscriptionACK
- Add TestDefaultProductionClientTimeouts regression test to verify default production timeouts are preserved
- Implement Merkle Longest Common Prefix (LCP) session affinity engine across OpenAI, Claude, Gemini, Interactions, and Responses protocols in sdk/cliproxy/session/lcp.go
- Implement in-memory hierarchical session tree store with dynamic lineage recalculation, reparenting, cycle prevention, and parentIndex descendant cascading in sdk/cliproxy/session/tree.go
- Integrate Merkle prefix matching and hierarchical session tree into SessionAffinitySelector
- Bound SessionCache capacity to 65,536 entries with deterministic eviction
- Support Claude nested metadata parent extraction and Header+Body parent merging
- Enforce TTL expiration checks in touchLocked and bindLocked
- Propagate ParentSessionID in authDispatchRequest and RPopAuthWithSessionHierarchy for distributed Home dispatch
- Add isHierarchyParent in home_session_alias.go covering Claude, Codex, Pi slot, Antigravity, and Gemini caching
- Add comprehensive test suites in lcp_test.go, tree_test.go, selector_lcp_test.go, client_test.go, and home_session_alias_test.go
Close go-git repository handles across store operations and tests to avoid
leaked handles blocking recovery cleanup. Abort recovery before mutating the
worktree when close failures occur and retain backups when rollback fails.
- Add `ParsePluginExecutorResponseUsage` to extract token usage from non-streaming plugin responses across Claude, Gemini, Interactions, Antigravity, and OpenAI/Codex protocols.
- Add `ObservePluginExecutorStreamUsage` to observe and aggregate token usage across streaming chunks.
Closes: #5340
- Route image and video generation requests through `xaiChatBaseURL` so OAuth credentials default to the CLI chat proxy endpoint.
- Update `using_api` and base URL definitions to apply to both HTTP chat and media requests.
Closes: #5335
- Add `RegistrationEpoch` and `Generation` tracking to `Auth` and model registry to prevent stale scheduling and snapshot reconciliation races.
- Implement scheduler removal tombstones and `ApplyClientModelProjections` in the model registry to atomically discard out-of-order state updates.
- Track logical route models across execution results and preserve active model cooldowns during registry reconciliation.
- Add missing model schema fields including `multi_agent_reasoning_effort`, `requires_sandboxed_review`, `persistent_instructions`, `guardian_v2`, and `confirmation_policies`.
- Add `advisor-tool-2026-03-01` beta header support when advisor server tools are declared or explicitly requested.
- Ensure proper ordering of the advisor tool beta before advanced tool use and effort betas.
- Inject and preserve advisor tool beta across token counting and fingerprint preservation paths.
Closes: #5330
Track when executor calls cross an upstream transport boundary and use that
signal to keep model/provider errors from being replaced by later local
preparation, selection, or internal failures.
Mark HTTP, websocket, relay, and usage-tracked transports as upstream
attempts, while avoiding marks for local validation, logging, missing
sessions, and successful websocket handshakes before request send.
Parse relative auth expiry metadata and adjust Antigravity refresh timing.
- Strip trailing `thinking` and `redacted_thinking` blocks from the final assistant message during OpenAI responses translation.
- Drop the assistant message if no content blocks remain after stripping trailing thinking blocks.
Closes: #5321
- Strip trailing assistant prefill messages for Opus 5 and Sonnet 4.6 model families in addition to Fable models during OpenAI responses translation.
Closes: #5319
- Replace consecutive thinking blocks with the latest reasoning item in assistant messages.
- Flush pending tool use parts upon encountering subsequent reasoning items to maintain proper block separation.
Closes: #5317
- Inline local `$ref` pointers and strip `$defs` and `definitions` from tool parameter schemas for Moonshot compatibility.
- Ensure tool parameter root objects declare an explicit `type: "object"`.
Closes: #5316
- Fall back to array index in tool calls accumulator when the `index` field is missing.
- Ensure parallel tool calls without explicit indices are accumulated properly during streaming.
Closes: #5058
- Ensure `message_delta` is emitted on tool call usage chunks and stream completion even if `finish_reason` is missing or null.
- Add `terminalOpenAIFinishReason` fallback to map missing finish reasons to standard stop reasons.
- Consolidate content block finalization into `finalizeOpenAIAnthropicContentBlocks` and delta emission into `emitAnthropicMessageDelta`.
Closes: #5308
- Synthesize the saved auth file from disk using `SynthesizeAuthFile` after persisting token records.
- Pass the canonical synthesized auth record to `postAuthPersistHook` instead of the raw input record.
Closes: #5290
- Add `buildHTTPSProxyDialTLSContext` to handle HTTPS proxy TLS handshakes with configurable timeout and TLS options.
- Restrict ALPN `NextProtos` to HTTP/1.1 for HTTPS proxy connections to prevent HTTP/2 negotiation issues during proxy CONNECT tunneling.
- Support custom TLS configuration in `httpConnectDialer` for HTTPS proxy connections.
Closes: #5287
- Populate a default string `items` schema on tool array definitions missing an items property for Gemini and Antigravity.
- Add helper to identify array declarations across single strings and type lists during schema normalization.
Closes: #5292
Keep round-robin rotation stable in the scheduler fast path when
credentials enter cooldown or are removed. Replace the numeric readyView
cursor modulo normalization with ID-based successor binary search,
aligning readyView with RoundRobinSelector.
