#89's grilling session surfaced a real upstream gap: APM's agent
primitive has no per-target compile integrator, so tools: and every
Claude-only field (isolation, maxTurns, effort, memory, permissionMode)
would verbatim-copy into Copilot's file with an incompatible or
unrecognized shape. Omitting them entirely is the only option that
never ships a wrong value to a real harness.
Scoped to plugin-scope agent-author only — project/user scope keep
today's Claude+Copilot pair model unchanged. Partially supersedes
ADR-0005 and ADR-0008's plugin-scope clauses (addenda appended to
both); ADR-0009's field-inventory.md mechanism is unaffected, only
its plugin-scope content shape changes.
Refs: #89
Defame1297
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