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Ran Shem Tov 620cf00974 fix(showcase): green strands + strands-typescript D6 cells via id-invariant fixtures + real multimodal assets
Strands mints UUID tool_call_ids for tool results (confirmed via the aimock
journal), so the langgraph-python toolCallId-keyed follow-up fixtures never
matched and the agent re-emitted the tool, looping (text-unstable) across
frontend-tools, gen-ui-agent, gen-ui-open, gen-ui-open-advanced,
gen-ui-headless-complete, reasoning-chain and the weather pills. Re-key the
affected multi-leg fixtures to the id- and thread-history-invariant
sequenceIndex pattern (as built-in-agent does), for both integrations.

Also:
- Add write_document poem/email/quantum fixtures for shared-state-streaming
  (was a stale single fixture that 404d).
- Strip content from reasoning-chain tool legs (content+toolCalls in one
  fixture is undefined behavior); reasoning rides toolCalls alone.
- Narrow the over-broad d4 summarize catch-all to "Summarize the sales
  pipeline" so it stops shadowing gen-ui-agent competitor pill; matches
  langgraph-python.
- Commit the real multimodal sample.png/sample.pdf (were git-LFS pointers
  the harness could not resolve).
2026-06-23 19:46:43 -07:00
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