Devtools package handoff

packages/devtools owns application-only trace capture, composition with upstream replay cassettes, and framework-neutral semantic parity reports.

• Never record adapter requests/chunks or implement replay; use @agentskit/eval/replay.
• Never execute actions or tools from a fixture.
• Trace details are bounded JSON and configured sensitive keys are redacted recursively.
• Parents must precede children and sequence values remain contiguous.
• Renderer parity compares semantic outcomes, never markup or pixels.

pnpm --filter @agentskit/chat-devtools lint
pnpm --filter @agentskit/chat-devtools test
pnpm --filter @agentskit/chat-devtools build