Release v1.16.1 — Fix 6 Responses API schema bugs + debug logging (#145)

## Summary

Release v1.16.1 — fixes 6 schema conformance bugs in the Responses API
and adds debug logging across all LLM handlers.

### Fixed

- **item_reference dropped** — `responsesInputToMessages()` now
synthesizes an assistant message with a matching `function_call` when a
`function_call_output` has no prior matching call, preventing
item_reference loss (turnIndex stuck at 0)
- **annotations missing** — Added `annotations: []` to all four
`output_text` content items for schema conformance
- **item_id missing on reasoning events** — Added `item_id` to
`reasoning_summary_part.added`, `.done`, and
`reasoning_summary_text.done` events
- **web_search_call action missing type** — Changed `action: { query }`
to `action: { type: "search", query }` in both streaming events and
output prefix
- **item_reference for text messages** — Extended item_reference
handling to cover assistant text messages, not just function_call_output
compensation
- **multi-fco assistantCount inflation** — Fixed backward scan to find
and append to existing assistant messages with tool_calls instead of
creating duplicates

### Added

- Debug logging (`logger.debug("Fixture matched/No fixture matched")`)
across all 14 LLM handler files
- 27 new tests including e2e integration tests for turnIndex +
item_reference

## Test plan

- [x] `npx vitest run` — 2602/2602 pass
- [x] 7-agent CR round 1 + fix round + 7-agent confirmation round —
converged to 0 functional findings

Author: jpr5

.claude-plugin/marketplace.json

@@ -9,7 +9,7 @@
       "source": {
         "source": "npm",
         "package": "@copilotkit/aimock",
-        "version": "^1.13.0"
+        "version": "^1.16.0"
       },
       "description": "Fixture authoring skill for @copilotkit/aimock — LLM, multimedia (image/TTS/transcription/video), MCP, A2A, AG-UI, vector, embeddings, structured output, sequential responses, streaming physics, record/replay, agent loop patterns, and debugging"
     }

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "aimock",
-  "version": "1.16.0",
+  "version": "1.16.1",
   "description": "Fixture authoring guidance for @copilotkit/aimock — LLM, multimedia, MCP, A2A, AG-UI, vector, and service mocking",
   "author": {
     "name": "CopilotKit"

CHANGELOG.md

@@ -1,5 +1,20 @@
 # @copilotkit/aimock
 
+## [1.16.1] - 2026-04-28
+
+### Fixed
+
+- **Responses API: item_reference dropped** — `responsesInputToMessages()` now synthesizes an assistant message with a matching `function_call` when a `function_call_output` has no prior matching call, preventing item_reference loss
+- **Responses API: annotations missing** — Added `annotations: []` to all four `output_text` content items (streaming `.added`, `.done`, prefix, and non-streaming) for schema conformance
+- **Responses API: item_id missing on reasoning events** — Added `item_id` to `reasoning_summary_part.added`, `reasoning_summary_part.done`, and `reasoning_summary_text.done` events
+- **Responses API: web_search_call action missing type** — Changed `action: { query }` to `action: { type: "search", query }` in both streaming events and output prefix
+- **Responses API: item_reference for text messages** — Extended item_reference handling to cover assistant text messages, not just function_call_output compensation
+- **Responses API: multi-fco assistantCount inflation** — Fixed backward scan in `responsesInputToMessages()` to find and append to existing assistant messages with tool_calls instead of creating duplicates
+
+### Added
+
+- **Debug logging across all LLM handlers** — Added `logger.debug("Fixture matched: ...")` on match and `logger.debug("No fixture matched...")` on no-match to: server.ts, responses.ts, messages.ts, gemini.ts, bedrock.ts, bedrock-converse.ts, cohere.ts, ollama.ts, embeddings.ts, images.ts, speech.ts, transcription.ts, video.ts
+
 ## 1.16.0
 
 ### Added

charts/aimock/Chart.yaml

@@ -3,4 +3,4 @@ name: aimock
 description: Mock infrastructure for AI application testing (OpenAI, Anthropic, Gemini, MCP, A2A, vector)
 type: application
 version: 0.1.0
-appVersion: "1.13.0"
+appVersion: "1.16.1"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@copilotkit/aimock",
-  "version": "1.16.0",
+  "version": "1.16.1",
   "description": "Mock infrastructure for AI application testing — LLM APIs, image generation, text-to-speech, transcription, video generation, MCP tools, A2A agents, AG-UI event streams, vector databases, search, rerank, and moderation. One package, one port, zero dependencies.",
   "license": "MIT",
   "keywords": [