Two halves of the same UX win — the user wants to see what Claude is
doing while a chat reply is in flight instead of staring at "0s" for
minutes.
Workspace side (claude_sdk_executor.py):
- The executor's _run_query message loop already iterated the SDK
stream for AssistantMessage.TextBlock content. Now also detects
ToolUseBlock / ServerToolUseBlock entries (by class name, since
the conftest stub doesn't define them) and fires-and-forgets a
POST /workspaces/:id/activity row of type agent_log per tool use.
- _summarize_tool_use maps the common tools (Read, Write, Edit,
Bash, Glob, Grep, WebFetch, WebSearch, Task, TodoWrite) to a
one-line summary with the file path / pattern / command, falling
back to "🛠 <tool>(…)" for anything else. Truncated at 200 chars.
- Posts directly to /workspaces/:id/activity rather than going
through a2a_tools.report_activity, which would also push a
/registry/heartbeat current_task and double-log as a TASK_UPDATED
line in the same chat feed.
- All failures swallowed silently — telemetry must not break
the conversation.
Canvas side (ChatTab.tsx):
- The existing ACTIVITY_LOGGED handler streams a2a_send /
a2a_receive / task_update events into a sliding-window
activityLog state. Two issues fixed:
1. No `msg.workspace_id === workspaceId` filter — a sibling
workspace's a2a_send was leaking into the wrong chat
panel as "→ Delegating to X...". Added an early return.
2. No agent_log render branch. Added one that renders the
summary verbatim (the workspace already prefixed its
own emoji icon, so no double-icon).
- Existing 8-line sliding window keeps the UI scoped; older
progress lines naturally roll off as new ones arrive.
Result: when DD is delegating to Visual Designer + reading
config files + running Bash to lint, the spinner area shows:
📄 Read /configs/system-prompt.md
⚡ Bash: pnpm test
→ Delegating to Visual Designer...
← Visual Designer responded (47s)
instead of bare "0s · Processing with Claude Code..." for minutes.
63 Python tests + 58 canvas chat tests pass; tsc clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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