* fix(agents): classify Anthropic "unexpected error" api_error as transient (#57010)
Anthropic sometimes returns api_error payloads with message "An unexpected
error occurred while processing the response" during mid-stream failures.
This was not matched by API_ERROR_TRANSIENT_SIGNALS_RE, causing the error
to surface as terminal instead of triggering retry/fallback.
Add "unexpected error" to the transient signal regex. This follows the
same pattern as prior fixes for "Internal server error" (#23193) and
overloaded_error 529 (#34535).
Closes#57010
* chore(changelog): add anthropic failover entry
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Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
* feat(openai): forward text verbosity across responses transports
* fix(openai): remove stale verbosity rebase artifact
* chore(changelog): add openai text verbosity entry
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Co-authored-by: Ubuntu <ubuntu@vps-1c82b947.vps.ovh.net>
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
Problem: When LLM stops responding, the agent hangs for ~5 minutes with no feedback.
Users had to use /stop to recover.
Solution: Add idle timeout detection for LLM streaming responses.
* gateway: fix /v1/responses tool schema to use flat Responses API format
* gateway: fix remaining stale wrapped-format tools in parity tests
* gateway: propagate strict flag through extractClientTools normalization
* fix(gateway): cover responses tool boundary
* Delete docs/internal/vincentkoc/2026-03-30-pr-57166-responses-tool-schema-followup.md
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Co-authored-by: Michel Belleau <mbelleau@Michels-MacBook-Pro.local>
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
* fix: inject anthropic service_tier for OAuth auth
Remove the OAuth-token exclusion from createAnthropicFastModeWrapper
so that sk-ant-oat-* requests receive service_tier injection, matching
Claude Code CLI behavior and reducing avoidable 529 overload cascades.
isAnthropicOAuthApiKey remains in use in createAnthropicBetaHeadersWrapper
for beta header selection — it is not dead code after this change.
Fixes#55758
* docs(changelog): note anthropic oauth service tier fix
* Update CHANGELOG.md
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Co-authored-by: Cypherm <28184436+Cypherm@users.noreply.github.com>
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
The transcript validator regex rejected namespaced MCP tool names
(e.g., vigil-harbor:memory_status) because colon wasn't in the
allowed character set. Tool call blocks were silently dropped during
session repair, breaking tool-call/result pairing.
Also closes a resource leak: if client.connect() throws after the
transport is instantiated, the transport is now explicitly closed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
MCP tools are now prefixed with their server name (e.g., vigil-harbor:memory_status)
to prevent collisions between tools from different MCP servers and built-in tools.
Adds SSE and StreamableHTTP transport support alongside existing stdio, enabling
connection to remote MCP servers via URL-based config with optional custom headers
and env var substitution. Includes config validation, session lifecycle management,
and 5 new tests for HTTP config edge cases.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
