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async-render-example

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Example skill — demonstrates async execution affinity: long-running tools surface as deferredHint=true in MCP tools/list. Use as a reference when writing domain skills with render or simulation tools. Not intended for production use.

examples/skills/async-render-example/SKILL.md

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# Async Render Example (issue #317)

This skill demonstrates the `execution` and `timeout_hint_secs` fields added
for issue #317. Tools are declared with either `execution: sync` (default)
or `execution: async`; the MCP server derives the `deferredHint` annotation
from this value and surfaces `timeout_hint_secs` under
`_meta.dcc.timeoutHintSecs` on the tool definition (never inside
`annotations`).

## Behaviour

- `render_frames` → `execution: async` + `timeout_hint_secs: 600`
  → `tools/list` entry gets `"annotations": { "deferredHint": true, ... }`
  and `"_meta": { "dcc": { "timeoutHintSecs": 600 } }`.
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