{
  "$schema": "handoff-protocol.skill-fixtures/v1.3",
  "status": "runnable",
  "rules": {
    "network": "none",
    "filesystem": "temporary-workspace-only",
    "pii": "fictional-only",
    "pass_claim": "runner evidence and expected rejection required"
  },
  "fixtures": [
    {
      "id": "SK-HP-P-001",
      "polarity": "positive",
      "given": "An independent task has a real task receipt, an authoritative root, and four required persistence targets.",
      "then": ["Validate all packet and receipt Schemas", "Write or propose all four targets", "Parent re-reads all four from the authoritative root"]
    },
    {
      "id": "SK-HP-P-002",
      "polarity": "positive",
      "given": "Concurrent events use an adapter that serializes atomic journal appends.",
      "then": ["Every append returns an exit-zero receipt", "All events and positions are unique", "No event is lost"]
    },
    {
      "id": "SK-HP-P-003",
      "polarity": "positive",
      "given": "Both independent-task and bounded-subagent adapters are available.",
      "then": ["An independent-task request uses task.create", "No nested spawn is used"]
    },
    {
      "id": "SK-HP-P-004",
      "polarity": "positive",
      "given": "Independent tasks are unavailable but the packet explicitly permits degradation and continuity is not required.",
      "then": ["Use bounded spawn", "Receipt records both modes and the reason"]
    },
    {
      "id": "SK-HP-P-005",
      "polarity": "positive",
      "given": "A bounded subtask has no durable facts.",
      "then": ["All four targets may be N/A only with reasons", "Parent verification reports four N/A checks"]
    },
    {
      "id": "SK-HP-P-006",
      "polarity": "positive",
      "given": "A v1.2 caller sends the original four-field dispatch and return packets.",
      "then": ["Both legacy packets remain schema-valid", "The omitted execution mode routes as bounded_subagent"]
    },
    {
      "id": "SK-HP-P-007",
      "polarity": "positive",
      "given": "No independent-task adapter exists and degradation is not permitted.",
      "then": ["Return a schema-valid undelivered outcome", "Do not invent dispatch/task IDs or provider evidence"]
    },
    {
      "id": "SK-HP-P-008",
      "polarity": "positive",
      "given": "A bounded subagent has four required persistence targets while both spawn and independent-task adapters are available.",
      "then": ["Use bounded agent.spawn rather than task.create", "Write memory, worklog, and journal and return a board proposal", "Parent verifies all four targets without claiming an independently resumable task/thread"]
    },
    {
      "id": "SK-HP-N-001",
      "polarity": "negative",
      "given": "No follow-up adapter or artifact exists.",
      "then": ["Keep missing fields pending", "Make zero follow-up claims"]
    },
    {
      "id": "SK-HP-N-002",
      "polarity": "negative",
      "given": "A persistence contract has an empty target list.",
      "then": ["Schema validation rejects the empty set"]
    },
    {
      "id": "SK-HP-N-003",
      "polarity": "negative",
      "given": "An independent dispatch workspace or closure receipt points to a decoy root.",
      "then": ["Dispatch linkage binds the workspace receipt to the contract root", "Parent readback rejects the wrong closure root"]
    },
    {
      "id": "SK-HP-N-004",
      "polarity": "negative",
      "given": "Three targets landed but the worklog file is absent.",
      "then": ["Parent readback rejects partial landing"]
    },
    {
      "id": "SK-HP-N-005",
      "polarity": "negative",
      "given": "The team-journal adapter exits nonzero.",
      "then": ["Expose the nonzero error", "Do not issue a success receipt"]
    },
    {
      "id": "SK-HP-N-006",
      "polarity": "negative",
      "given": "Children try to update a central board concurrently.",
      "then": ["Reject child writes", "Allow the named single writer to serialize proposals without loss"]
    },
    {
      "id": "SK-HP-N-007",
      "polarity": "negative",
      "given": "Only SKILL.md is copied, or a copied package contains an unresolved local Schema reference or malformed Schema.",
      "then": ["Package validation reports invalid_install", "The copied Schemas and their local references are validated"]
    },
    {
      "id": "SK-HP-N-008",
      "polarity": "negative",
      "given": "A manifest version drifts from the plugin and Skill declaration.",
      "then": ["Version validation rejects the drift"]
    },
    {
      "id": "SK-HP-N-009",
      "polarity": "negative",
      "given": "Four array entries repeat the same persistence target, or required targets reuse one evidence nonce.",
      "then": ["Persistence, closure, and parent-verification Schemas reject duplicate target sets", "Semantic validation rejects reused target nonces"]
    },
    {
      "id": "SK-HP-N-010",
      "polarity": "negative",
      "given": "A parent trace claims pass while one target check is failed.",
      "then": ["Parent-verification Schema rejects the inconsistent status"]
    },
    {
      "id": "SK-HP-N-011",
      "polarity": "negative",
      "given": "An accepted dispatch lacks provider evidence.",
      "then": ["Dispatch-receipt Schema rejects the fake acceptance"]
    },
    {
      "id": "SK-HP-N-012",
      "polarity": "negative",
      "given": "A child claims it directly updated the central board, or marks an employee-owned target as a parent proposal.",
      "then": ["Closure-receipt Schema requires a central-board proposal or reasoned N/A instead", "Only central_board may use proposed_for_parent"]
    },
    {
      "id": "SK-HP-N-013",
      "polarity": "negative",
      "given": "A closure has an empty log provider, wrong writer, counterfeit journal receipt, fake SHA-256, or mismatched verification method.",
      "then": ["Schema and parent verification reject all five forgeries"]
    },
    {
      "id": "SK-HP-N-014",
      "polarity": "negative",
      "given": "Closure receipts from task A are inserted into task B's return packet, or receipts from a prior dispatch are replayed under a second dispatch of the same contract.",
      "then": ["Handoff, contract, dispatch, return, closure, and verification IDs prevent cross-task mixing", "Return execution mode matches the dispatch effective mode", "Fresh nonce-and-dispatch-bound evidence anchors reject relabelled stale artifacts even under the same root and paths", "Independent task IDs are unique"]
    },
    {
      "id": "SK-HP-N-015",
      "polarity": "negative",
      "given": "A dispatch receipt claims an unauthorized bounded-to-independent upgrade, or claims execution details while undelivered.",
      "then": ["Reject unauthorized mode upgrade", "Reject effective mode, workspace, and degradation evidence on undelivered"]
    },
    {
      "id": "SK-HP-N-016",
      "polarity": "negative",
      "given": "A bounded subagent has a persistence contract but returns no closure receipts.",
      "then": ["Persistence obligations still apply even though execution_mode is bounded_subagent", "Return Schema requires four receipts when contract_id is present", "Cross-object linkage requires four receipts whenever a persistence contract exists"]
    }
  ]
}