Use explicit fresh hosted capability snapshots for plan checks

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a07ff8-19d0-7820-b4d0-1353833cb7fc

workplans/REUSE-WP-0022-hosted-plan-check.md

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+---
+id: REUSE-WP-0022
+type: workplan
+title: "Use current hosted capability discovery in factory planning"
+domain: infotech
+repo: reuse-surface
+status: active
+owner: the-custodian
+topic_slug: helix-forge
+created: "2026-09-08"
+updated: "2026-09-08"
+related: [HFACT-WP-0001, VERGABE-WP-0018]
+---
+
+# Hosted query-before-build
+
+## Core Idea
+
+The hosted index contains capabilities absent from the checked-in federation.
+Provide an explicit hosted plan-check that fetches current discovery, preserves
+its provenance and refuses incomplete or stale source evidence before producing
+a recommendation. Vergabe-teilnahme is the first delivery-workflow consumer.
+
+## Implement and verify hosted planning
+
+```task
+id: REUSE-WP-0022-T01
+status: progress
+priority: high
+assignee: the-custodian
+```
+
+Use the existing public GET /v1/federated. Preserve local mode compatibility.
+Accept only bounded, structurally usable, recently composed, unwarned responses;
+report endpoint, counts, composition/retrieval times and response digest. Never
+convert source failure into a NEW verdict, gap request or local fallback. Test
+hosted-only matches, malformed/stale/partial sources and transport failures.
+No additional service, model call or mutation credential is necessary.
+
+## Publish and return the consumer receipt
+
+```task
+id: REUSE-WP-0022-T02
+status: wait
+priority: high
+assignee: the-custodian
+depends_on: [REUSE-WP-0022-T01]
+blocking_reason: "Await tested source and reviewable PR, then VERGABE-WP-0018 hosted discovery receipt."
+```
+
+Publish the tested implementation through the existing Forgejo review path.
+Capture a real hosted check invoked from vergabe-teilnahme with pinned source
+revision. Return source and consumer evidence to HFACT-WP-0001-T06; it is source
+preparation, not proof that the governed Railiance worker performed the change.