{
  "schema_version":"0.1",
  "control_id":"P18F2",
  "status":"implemented_read_only_contract_introductions_disabled",
  "reviewed_on":"2026-09-16",
  "purpose":"Help people with related work discover useful comparisons without converting similarity, prestige, popularity, funding, or discussion into scientific authority.",
  "dependencies":["P13","P14","P17","P18A","P18B","P18C","P18D","P18E","P18F","EDU01S2","EDU02"],
  "required_effort_snapshot_fields":["effort_id","question","assumptions","methods","expected_results","disconfirming_evidence","unresolved_concerns","capabilities","gaps","recorded_at","snapshot_hash"],
  "match_dimensions":{
    "permitted":["related questions or scalars","complementary methods or instruments","shared replication needs","different assumptions or interpretive frames","one effort's gap and another effort's capability"],
    "required":["productive overlap","important divergence"],
    "prohibited":["agreement with the common model","likes or follower counts","contributor rank","institutional prestige","agreement counts","most accepted labels","grant success"]
  },
  "required_match_fields":["match_id","effort_refs","nonpersonal_preview","productive_overlap","important_divergence","reinforcement_risk","independence_state","rotation_reason","neglected_area_context","consent_state","minor_boundary","status"],
  "reinforcement_rule":"A proposal without an important divergence must be labeled potentially_reinforcing and may not be described as independent corroboration.",
  "consent_flow":["show a nonpersonal preview","request consent separately from each participant","reveal names only after mutual opt-in","permit either participant to decline or leave","record that declining has no effect on recognition, funding, or access"],
  "comparison_charter_fields":["bounded_question","independent_position_refs","separation_rules","change_evidence","null_or_failure_outcomes","disagreement_preservation","completion_or_exit_point"],
  "branch_rules":["freeze an immutable pre-discussion snapshot","prepare detailed results independently before comparison","compare only after both branches are recorded","preserve unresolved branches","do not average disagreement into consensus","do not let discussion directly modify evidence or the shared model"],
  "rotation_rules":["avoid repeatedly matching the same cluster","bridge theorist and experimentalist","bridge supporter and assumption challenger","bridge expected success and null-result work","bridge developer and safety reviewer","bridge mature and alternative approaches"],
  "neglected_area_rules":["surface under-attended questions as opportunities","never equate low activity with low importance","record why a low-activity area was surfaced","do not penalize a participant for choosing an unfashionable branch"],
  "recognition_and_funding_boundary":["an introduction is coordination, not endorsement","a team or grant application does not elevate scientific status","recognition remains tied to documented accomplishment","funding outcomes cannot change evidence confidence","declining an introduction cannot reduce recognition, funding access, or site access"],
  "minor_boundary":["use only teacher or guardian mediated introductions","do not reveal a minor's personal information or external profile","do not permit private adult-minor communication","do not exchange direct contact details","stop and escalate any boundary concern to a named safeguarding process"],
  "example_preview":{"heading":"Potentially useful comparison","body":"Both efforts examine detector-frame recurrence, but they use different assumptions and validation methods. One emphasizes formal mappings; the other investigates instrument-dependent null results. Comparing their protocols may expose hidden dependencies. This suggestion does not imply agreement, endorsement, or independent confirmation."},
  "daily_introduction":{"cadence":"UTC calendar day","variation_count":14,"purpose":"Present a changing doorway into the same plural, cross-disciplinary inquiry without changing evidence or scientific status.","required_concepts":["negative spaces between mainstream sciences","particle physics","quantum physics","chemistry","disciplinary diversity","dark matter and dark energy as inferred unresolved phenomena","roughly 95 percent of the inferred cosmic mass-energy budget"],"required_boundary":"Each variation must distinguish an exploratory Substrate Cosmology relationship from an established explanation of dark matter or dark energy.","source":"app/investigate/forum-threads/DailyForumIntroduction.tsx"},
  "interaction_gate":{"state":"blocked","disabled_capabilities":["automated matching","introduction requests","identity disclosure","contact exchange","private messaging","group creation"],"requires":["all P18 readiness gates","verified operating capacity","independent privacy and legal review","moderation and appeal coverage","minor safeguarding review where applicable"]},
  "evolution_hooks":["forum.introduction.schema.changed","forum.thread.schema.changed","popularity.signal.changed","privacy.expectation.changed","minor.safeguard.changed","moderation.capacity.changed","feature.deprecated"],
  "limitations":["the public examples are synthetic","the contract does not create accounts or introductions","matching does not verify scientific merit or identity","software cannot by itself detect deceptive identity claims","minor safeguards require trained human oversight"],
  "successor_path":"Version the contract, retain immutable snapshots and prior consent states, run the rejection fixtures beside any replacement, and keep identity or contact exchange disabled until every forum and safeguarding gate passes.",
  "verification":{"checker":"scripts/check-forum-introductions.mjs","fixtures":"forum-introduction-fixtures.json","command":"pnpm check:site"}
}