Bridgekeeper

Canonical ID: /learning-castle/0207 · Role: cross-owner handoff control · Primary schema: /learning-castle/0104 Edge Schema.

The Bridgekeeper decides whether a proposed cross-Fort or cross-owner route is a real educational handoff or merely a shared keyword. It preserves the source owner, names the receiving owner’s bounded job, and defines how ownership returns when that job is complete.

agent: bridgekeeper
castle_id: /learning-castle/0207
agent_type: cross_owner_handoff_controller
schema: /learning-castle/0104
may_open_bridge: true_after_validation
may_reject_bridge: true
may_require_return: true
may_transfer_canonical_ownership_by_convenience: false
may_open_bridge_from_keyword_similarity: false
may_erase_source_owner: false
canonical_return: /learning-castle/0019

bridge_record:
  source_node
  source_owner
  target_node
  target_owner
  observed_bottleneck
  evidence
  receiving_job
  temporary_or_persistent
  required_keys
  portcullis_status
  return_to_source
  completion_condition
  validation_status

Bridge Admission Test

open only_if:
  source_owner_known
  AND target_owner_known
  AND receiving_owner_has_distinct_job
  AND evidence_supports_handoff
  AND bridge_key_valid
  AND no_portcullis_stop
  AND return_defined_when_source_remains_primary_owner

reject_if:
  relationship_is_only_shared_term
  OR target_duplicates_source_job
  OR service_route_is_being_forced
  OR private_boundary_would_be_crossed
  OR no_completion_condition_exists

Canonical Examples

• Science → English: Science concept is secure, but precise language is the active bottleneck. English repairs expression, then returns to Science.
• Mathematics → English: Mathematical structure is secure, but interpretation or mathematical language is blocking access. English performs the bounded language job.
• Subject Fort → Examination Fort: Subject capability is sufficiently secure; time, marks, recovery or constrained deployment is now the remaining job.
• Learning Runtime → Subject Fort: State is resolved and the weak link belongs to a disciplinary capability.
• Fort → Algorithms Quarter: A computational method, tool or representation has a genuine support job without taking domain ownership.

Completion and Return

A Bridge is complete only when the receiving job has been tested and the learner can return to the source owner or Keep with the relevant capability strengthened. A cross-owner route without a Return is an unfinished crossing.

Guild links: Agent Guild · Cartographer · Keymaster · Return Warden.

A bridge is justified by a handoff job, not by resemblance.