{
  "schema": "pi.dropin.certification_contract.v1",
  "bead_id": "bd-35t7i",
  "version": "1.0.0",
  "effective_date_utc": "2026-02-14T19:30:00Z",
  "status": "active_blocking_policy",
  "policy_owner_issue": "bd-35t7i",
  "normative_statement": "Pi Rust MUST NOT be described as a strict drop-in replacement unless every hard gate in this contract is PASS with verifiable evidence.",
  "decision_model": {
    "gate_states": [
      "pass",
      "fail",
      "blocked",
      "waived"
    ],
    "waiver_policy": "Waivers are allowed only for non-critical gates and require explicit release-note disclosure.",
    "overall_verdict_rule": "CERTIFIED only when all hard gates are pass and no critical parity ledger gaps remain open."
  },
  "hard_gates": [
    {
      "gate_id": "G01-baseline-freeze",
      "domain": "baseline",
      "blocking": true,
      "owner_issue_primary": "bd-2ej25",
      "required_beads": [
        "bd-2ej25"
      ],
      "required_artifacts": [
        "docs/dropin-upstream-baseline.json"
      ],
      "required_evidence": [
        "Pinned upstream commit and package version are present.",
        "Source/docs manifests are checksummed and reproducible."
      ],
      "pass_criteria": [
        "Baseline schema is valid and points to a single canonical upstream commit.",
        "No active parity artifact points to a conflicting baseline snapshot."
      ],
      "fail_conditions": [
        "Baseline artifact missing, stale, or conflicting."
      ]
    },
    {
      "gate_id": "G02-feature-inventory-complete",
      "domain": "inventory",
      "blocking": true,
      "owner_issue_primary": "bd-w9i9o",
      "required_beads": [
        "bd-w9i9o"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-feature-inventory-matrix.json",
        "docs/dropin-112-feature-inventory-matrix.md"
      ],
      "required_evidence": [
        "Execution surfaces are inventoried across CLI, JSON, RPC, SDK, config, session, extensions, tools, and providers.",
        "Rows carry source evidence pointers for TS and Rust."
      ],
      "pass_criteria": [
        "Inventory artifacts are present and reconciled to baseline.",
        "No in-scope execution surface is missing from inventory."
      ],
      "fail_conditions": [
        "Missing surface inventory or baseline/inventory disagreement."
      ]
    },
    {
      "gate_id": "G03-gap-ledger-owned",
      "domain": "gap-ledger",
      "blocking": true,
      "owner_issue_primary": "bd-13pqz",
      "required_beads": [
        "bd-13pqz"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json",
        "docs/dropin-error-crosswalk.json"
      ],
      "required_evidence": [
        "Each known mismatch has severity, ownership, and closure path.",
        "Coverage mapping links mismatch sources to ledger entries."
      ],
      "pass_criteria": [
        "Ledger is schema-valid and comprehensive for known mismatches.",
        "Critical mismatches have active owner beads."
      ],
      "fail_conditions": [
        "Unowned mismatch or critical mismatch without closure path."
      ]
    },
    {
      "gate_id": "G04-cli-parity",
      "domain": "cli",
      "blocking": true,
      "owner_issue_primary": "bd-3meug",
      "required_beads": [
        "bd-2cd9b",
        "bd-3meug"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "CLI command/flag/subcommand parity matrix results.",
        "Extension-registered flag pass-through conformance tests."
      ],
      "pass_criteria": [
        "No open critical/high CLI gaps in parity ledger.",
        "CLI parity tests pass for baseline invocation patterns."
      ],
      "fail_conditions": [
        "Required CLI path missing or behaviorally divergent.",
        "Extension flag pass-through mismatch."
      ]
    },
    {
      "gate_id": "G05-json-rpc-parity",
      "domain": "json-and-rpc",
      "blocking": true,
      "owner_issue_primary": "bd-2ez14",
      "required_beads": [
        "bd-15ggf",
        "bd-3eb4d",
        "bd-38v5y",
        "bd-2my4b",
        "bd-359pl",
        "bd-2ez14"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "JSON event schema and ordering conformance outputs.",
        "RPC command semantic parity results.",
        "Extension UI/tool event parity fixtures."
      ],
      "pass_criteria": [
        "No open critical/high JSON or RPC gaps remain.",
        "Differential transcript comparison shows no unresolved semantic mismatches."
      ],
      "fail_conditions": [
        "Missing/incorrect event variants or ordering drift.",
        "RPC command mismatch in in-scope surface."
      ]
    },
    {
      "gate_id": "G06-sdk-companion",
      "domain": "sdk",
      "blocking": false,
      "owner_issue_primary": "bd-28zrk",
      "required_beads": [
        "bd-1it6z",
        "bd-c9usa",
        "bd-2ibww",
        "bd-3fbzn",
        "bd-2xhgm",
        "bd-28zrk"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json",
        "docs/dropin-sdk-contract.json"
      ],
      "required_evidence": [
        "SDK documentation and usage examples.",
        "Functional capability demonstration.",
        "Idiomatic Rust API patterns."
      ],
      "pass_criteria": [
        "Rust SDK provides equivalent functionality to TypeScript SDK.",
        "SDK is documented as idiomatic Rust companion, not drop-in replacement.",
        "Embedding examples demonstrate functional equivalence."
      ],
      "fail_conditions": [
        "SDK lacks core capabilities present in TypeScript version.",
        "SDK documentation falsely claims drop-in compatibility."
      ]
    },
    {
      "gate_id": "G07-config-and-env-parity",
      "domain": "config-and-env",
      "blocking": true,
      "owner_issue_primary": "bd-uuf2z",
      "required_beads": [
        "bd-uuf2z"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "Config precedence/default parity tests.",
        "Environment variable contract verification."
      ],
      "pass_criteria": [
        "No open critical/high config/env gaps remain.",
        "Default and precedence behavior is documented and test-backed."
      ],
      "fail_conditions": [
        "Divergent defaults without approved compatibility policy.",
        "Unsupported required env contract."
      ]
    },
    {
      "gate_id": "G08-session-error-parity",
      "domain": "session-and-errors",
      "blocking": true,
      "owner_issue_primary": "bd-b4s4l",
      "required_beads": [
        "bd-b4s4l",
        "bd-3kz49"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "Session branching/compaction parity tests.",
        "Error model and exit code parity map."
      ],
      "pass_criteria": [
        "Session and error gaps are closed or explicitly waived.",
        "In-scope behavior is parity-verified."
      ],
      "fail_conditions": [
        "Session semantics diverge with data-loss-risk impact.",
        "Exit-code/error-envelope mismatch breaks automation."
      ]
    },
    {
      "gate_id": "G09-integration-io-parity",
      "domain": "integration-io",
      "blocking": true,
      "owner_issue_primary": "bd-2xalc",
      "required_beads": [
        "bd-2xalc"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "stdio framing and non-interactive semantics parity checks.",
        "Pipe behavior parity evidence."
      ],
      "pass_criteria": [
        "Integration I/O parity gaps closed for supported execution modes.",
        "No unresolved framing/truncation mismatch."
      ],
      "fail_conditions": [
        "Protocol framing difference that can break existing clients.",
        "Tool I/O limit mismatch without approved policy."
      ]
    },
    {
      "gate_id": "G10-differential-evidence-suite",
      "domain": "differential-testing",
      "blocking": true,
      "owner_issue_primary": "bd-1nq53",
      "required_beads": [
        "bd-37zh7",
        "bd-3vraw",
        "bd-1nq53"
      ],
      "required_artifacts": [
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "Differential runner outputs for mirrored scenarios.",
        "Golden transcript corpus coverage across CLI, JSON, RPC, and SDK."
      ],
      "pass_criteria": [
        "Required mirrored scenarios run with no unresolved semantic diffs.",
        "Corpus coverage satisfies execution-surface minimum set."
      ],
      "fail_conditions": [
        "Missing differential tests for any certified surface.",
        "Unresolved critical/high semantic diff."
      ]
    },
    {
      "gate_id": "G11-test-architecture-and-ci-enforcement",
      "domain": "quality-gates",
      "blocking": true,
      "owner_issue_primary": "bd-iumsf",
      "required_beads": [
        "bd-2m6qw",
        "bd-3d7jg",
        "bd-y20iz",
        "bd-322qy",
        "bd-1xsus",
        "bd-iumsf",
        "bd-18umj"
      ],
      "required_artifacts": [
        "docs/testing-policy.md",
        "docs/qa-runbook.md"
      ],
      "required_evidence": [
        "Versioned test architecture and logging contract.",
        "CI parity lanes with artifact retention and blocking behavior."
      ],
      "pass_criteria": [
        "Release path enforces parity gates automatically.",
        "Evidence artifacts are retained and traceable."
      ],
      "fail_conditions": [
        "Parity lanes non-blocking/bypassable for release claims.",
        "Certification not reproducible from retained artifacts."
      ]
    },
    {
      "gate_id": "G12-claim-language-alignment",
      "domain": "docs-and-positioning",
      "blocking": true,
      "owner_issue_primary": "bd-3cqgd",
      "required_beads": [
        "bd-3cqgd",
        "bd-hx9ks",
        "bd-2v813"
      ],
      "required_artifacts": [
        "README.md",
        "docs/evidence/dropin-parity-gap-ledger.json"
      ],
      "required_evidence": [
        "Public parity claims align with actual gate status.",
        "No contradictory 'already certified' language while hard gates are open."
      ],
      "pass_criteria": [
        "External parity claims are conditioned on this contract.",
        "Spec and gap-ledger artifacts are treated as normative."
      ],
      "fail_conditions": [
        "Strict drop-in claims present while hard gates are not all pass."
      ]
    }
  ],
  "release_process_enforcement": {
    "required_sequence": [
      {
        "step": 1,
        "description": "Refresh baseline and parity artifacts to current commit.",
        "required_outputs": [
          "docs/dropin-upstream-baseline.json",
          "docs/evidence/dropin-feature-inventory-matrix.json",
          "docs/evidence/dropin-parity-gap-ledger.json"
        ]
      },
      {
        "step": 2,
        "description": "Evaluate all hard gates and emit a machine-readable verdict artifact.",
        "required_outputs": [
          "docs/evidence/dropin-certification-verdict.json"
        ]
      },
      {
        "step": 3,
        "description": "Block release if verdict is not CERTIFIED.",
        "required_outputs": [
          "release gate log with explicit blocking reasons"
        ]
      },
      {
        "step": 4,
        "description": "Publish release notes that include certification verdict and evidence pointers.",
        "required_outputs": [
          "release notes section: drop-in certification status"
        ]
      }
    ],
    "verdict_artifact_contract": {
      "path": "docs/evidence/dropin-certification-verdict.json",
      "schema": "pi.dropin.certification_verdict.v1",
      "required_fields": [
        "git_commit",
        "generated_at_utc",
        "overall_verdict",
        "hard_gate_results",
        "blocking_reasons",
        "evidence_index"
      ],
      "blocking_rule": "overall_verdict MUST equal CERTIFIED for drop-in replacement release language to be allowed."
    }
  },
  "immediate_status_snapshot": {
    "overall_verdict_now": "CERTIFIED",
    "reason": "docs/evidence/dropin-certification-verdict.json reports 22/22 hard gates pass, including all 16 blocking gates, with no blocking reasons.",
    "open_critical_gate_domains": []
  },
  "maintenance_policy": {
    "update_trigger": "Any newly discovered mismatch or gate-topology change.",
    "required_actions_on_update": [
      "Bump version when gate semantics change.",
      "Update required_beads and required_artifacts.",
      "Recompute immediate_status_snapshot."
    ]
  }
}