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HUE-040 — Implement MCP/plugin mediation and deterministic job adapter

Canonical source: docs/roadmap/issues.json · HUE-040

Specification status: TBI · Readiness: agent:blocked

Goal

Section titled “Goal”

Extend capabilities without growing an unsafe core or calling LLMs unnecessarily.

Scope

Section titled “Scope”
  • Plugin/MCP discovery through capability policy
  • Installation permission disclosure
  • Deterministic script/job lifecycle adapter

Acceptance criteria

Section titled “Acceptance criteria”
  • Undeclared capability/network access denied
  • Health/auth states are distinct
  • Deterministic task can run with zero model calls
  • Plugin events/artifacts use common contracts

Dependencies

Section titled “Dependencies”
  • HUE-032
  • HUE-037

Non-goals

Section titled “Non-goals”
  • None beyond the documented scope.

Product contract

Section titled “Product contract”
  • Follow the milestone and repository product contract.

Implementation handoff requirements

Section titled “Implementation handoff requirements”
  • Preserve the documented security, project, memory and event boundaries.
  • Add or update automated tests for every observable acceptance criterion.
  • Provide real verification output; do not rely on a worker/agent self-report.
  • Update only the exact documentation sections whose status changed.
  • Include screenshots or a recording for user-interface changes.
  • Include migration, rollback and recovery notes for data/state changes.
  • Link the pull request to this issue with Closes #<issue-number>.