# Content Blocks Implementation Progress

## Goal
Fix HTTP 400 error: "tool_use ids were found without tool_result blocks immediately after"

Anthropic API requires all tool_result blocks from one assistant turn to be in a **single** user message:
```json
{
  "role": "user",
  "content": [
    {"type": "tool_result", "tool_use_id": "id1", "content": "result1"},
    {"type": "tool_result", "tool_use_id": "id2", "content": "result2"}
  ]
}
```

Current implementation creates separate user messages per tool result.

## Changes Required

### cnctd_ai
1. [x] Add `ToolResult` struct to represent individual tool results
2. [x] Add `Message::tool_results()` constructor for multiple tool results
3. [x] Add `tool_results` field to Message struct
4. [x] Update Anthropic client serialization to handle `tool_results` as content blocks
5. [x] Export `ToolResult` from lib.rs
6. [x] Published version 0.1.10

### cnctd.world  
1. [x] Update `results_to_messages()` to return single message with all results
2. [x] Update dependency to cnctd_ai 0.1.10
3. [x] Release build completed

## Progress Log

### 2026-01-06 - Session 1
- Reviewed MESSAGE_CONTENT_BLOCKS_AND_TOOL_KNOWLEDGE.md architecture doc
- Identified root cause: each tool result becomes separate API message
- Started implementation in cnctd_ai

### 2026-01-06 - Session 2 (after crash recovery)
- Completed all cnctd_ai changes
- Published 0.1.10 to crates.io
- Updated cnctd.world server to use 0.1.10
- Committed and pushed all changes
- Release build successful

## Next Steps
- Deploy to production
- Test multi-tool conversations
- If issues with context loading (historical messages), proceed with Phase 2 of architecture doc (DB content_blocks column)

## Commits
- cnctd_ai: c065efe - "feat: add multi-tool-result message support for Anthropic API"
- cnctd.world: ceda94b - "feat: use multi-tool-result messages for Anthropic API"
- cnctd (parent): 01824047 - "chore: update submodules for multi-tool-result fix"
