{
  "schema": "pi.dropin.parity_gap_ledger.v1",
  "bead_id": "bd-13pqz",
  "generated_at_utc": "2026-02-14T19:16:00Z",
  "status": "active",
  "baseline_reference": "docs/dropin-upstream-baseline.json",
  "inventory_references": [
    "docs/evidence/dropin-feature-inventory-matrix.json",
    "docs/dropin-112-feature-inventory-matrix.md"
  ],
  "severity_scale": {
    "critical": "Breaks strict drop-in behavior for existing integrators.",
    "high": "Likely observable divergence in common workflows.",
    "medium": "Narrower divergence, but still part of parity closure scope.",
    "low": "Non-blocking mismatch or governance/documentation alignment.",
    "waived": "Non-blocking divergence accepted by policy with explicit claim guard."
  },
  "entries": [
    {
      "gap_id": "gap-sdk-contract-shape",
      "priority_rank": 1,
      "area": "sdk",
      "mismatch_kind": "retired",
      "severity": "retired",
      "status": "retired",
      "retirement_date": "2026-04-22T17:50:00Z",
      "retirement_reason": "Strict SDK drop-in parity claim officially retired per bd-lnmtp.3.1 decision. Rust SDK provides functional equivalence through idiomatic API patterns.",
      "retirement_decision_bead": "bd-lnmtp.3.1",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:mode.sdk.embedding",
        "docs/evidence/dropin-feature-inventory-matrix.json#unknown:unknown-01-sdk-dropin-contract"
      ],
      "final_state": "Rust SDK provides equivalent functionality to TypeScript SDK using idiomatic Rust patterns. Contract shape parity no longer required.",
      "alternative_solution": "Use pi::sdk module for idiomatic Rust embedding with functional equivalence to TypeScript SDK capabilities.",
      "owner_issue_primary": "bd-1it6z",
      "owner_issue_supporting": [
        "bd-c9usa",
        "bd-2ibww",
        "bd-3fbzn"
      ]
    },
    {
      "gap_id": "gap-cli-extension-flag-pass-through",
      "priority_rank": 2,
      "area": "cli",
      "mismatch_kind": "closed",
      "severity": "resolved",
      "status": "closed",
      "closure_date": "2026-04-23T04:50:00Z",
      "closure_reason": "Extension flag pass-through fully implemented and tested. Comprehensive test coverage in tests/extension_flag_passthrough.rs with 11KB of integration tests covering CLI flag parsing, boolean flags, mixed flag sets, and edge cases.",
      "closure_bead": "bd-lnmtp.1",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:cli.extensions.dynamic_flags",
        "docs/evidence/dropin-feature-inventory-matrix.json#unknown:unknown-02-extension-cli-flag-pass-through"
      ],
      "final_state": "Two-pass CLI parsing implemented with extension-registered flag support. Extension flags properly extracted and passed through to extensions with correct precedence and semantics.",
      "verification_evidence": [
        "tests/extension_flag_passthrough.rs - comprehensive integration tests",
        "tests/cli_edge_cases.rs - 40+ edge case test functions",
        "G04 certification gate marked as pass in docs/evidence/dropin-certification-verdict.json"
      ],
      "owner_issue_primary": "bd-2cd9b",
      "owner_issue_supporting": [
        "bd-3meug"
      ]
    },
    {
      "gap_id": "gap-json-auto-lifecycle-events",
      "priority_rank": 3,
      "area": "json-mode",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-04-28T04:30:15Z",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:json.events.auto_lifecycle",
        "docs/dropin-112-feature-inventory-matrix.md#summary:agent-events-auto-compaction-auto-retry"
      ],
      "final_state": "Auto-compaction and auto-retry lifecycle events serialize through AgentEvent in JSON/RPC paths, preserving camelCase fields and omitting absent optional payloads. Focused parity tests cover schema, ordering, retry success omission, and compaction missing-key failure omission.",
      "owner_issue_primary": "bd-3b9mx",
      "owner_issue_supporting": [
        "bd-2my4b",
        "bd-2ilgm",
        "bd-38v5y"
      ],
      "closure_path": [
        "Emit auto_compaction_* and auto_retry_* JSON events via AgentEvent serialization.",
        "Verify optional fields are absent instead of null when no result/finalError exists.",
        "Backstop RPC auto-compaction and auto-retry runtime paths with focused regression tests."
      ],
      "verification_evidence": [
        "tests/json_mode_parity.rs: json_parity_auto_* schema and lifecycle matrix tests",
        "src/rpc.rs: rpc_auto_retry_retries_then_succeeds asserts successful auto_retry_end omits finalError",
        "src/rpc.rs: auto_compaction_missing_api_key_omits_absent_result_field asserts start/end ordering and failed auto_compaction_end omits result"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-json-rpc-command-semantic-coverage",
      "priority_rank": 4,
      "area": "json-mode",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-04-22T18:47:00Z",
      "sources": [
        "docs/dropin-112-feature-inventory-matrix.md#section:11-rpc-protocol-commands"
      ],
      "final_state": "RPC surface parity is classified command-by-command and event-by-event: 29 baseline commands, 29 Rust commands, 17 baseline events, 17 Rust events, 46 MATCH classifications, and zero IMPLEMENT divergences.",
      "alternative_solution": "N/A - no missing RPC command implementation remained after bd-lnmtp.2.1 surface classification.",
      "owner_issue_primary": "bd-lnmtp.2.2",
      "owner_issue_supporting": [
        "bd-lnmtp.2.1",
        "bd-lnmtp.2.3",
        "bd-lnmtp.2.4"
      ],
      "closure_path": [
        "Use docs/dropin-rpc-surface-diff.json as the command/event surface classification artifact.",
        "Confirm no IMPLEMENT divergences remain for RPC command semantics.",
        "Backstop extension UI request/response parity with deterministic fixture coverage while bd-lnmtp.2.3 owns aggregate stream-differential automation."
      ],
      "verification_evidence": [
        "docs/dropin-rpc-surface-diff.json summary: baseline_command_count=29, rust_command_count=29, baseline_event_count=17, rust_event_count=17, match_count=46, implement_count=0",
        "tests/fixtures/rpc_extension_ui_scenarios.json: extension UI request/response fixture coverage",
        "tests/rpc_extension_ui_scenarios.rs: validates fixture schema, scenarios, ordering, timeout, abort, legacy id alias, and payload round-trip coverage"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-json-tool-and-extension-ui-events",
      "priority_rank": 5,
      "area": "json-mode",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-04-28T04:30:15Z",
      "sources": [
        "docs/dropin-112-feature-inventory-matrix.md#section:11-rpc-events-responses",
        "docs/dropin-112-feature-inventory-matrix.md#section:15-extension-api-surface-ui"
      ],
      "final_state": "Tool execution event names and extension_ui_request/response round-trips are validated by deterministic test evidence. The parity closure bead bd-359pl is closed with targeted RPC and json_mode_parity coverage.",
      "owner_issue_primary": "bd-359pl",
      "owner_issue_supporting": [
        "bd-2my4b",
        "bd-38v5y"
      ],
      "closure_path": [
        "Match JSON-mode tool and extension UI event behavior in bd-359pl.",
        "Align envelope/schema expectations with bd-2my4b.",
        "Verify command-path dispatch coverage alongside bd-38v5y."
      ],
      "verification_evidence": [
        "tests/e2e_rpc.rs: extension_ui_request/response round-trips, id/requestId handling, and negative-path coverage",
        "tests/json_mode_parity.rs: tool_execution_start/update/end schema + event type assertions",
        "legacy_pi_mono_code/pi-mono/packages/agent/src/types.ts: upstream tool_execution_* event contract"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-cli-slash-command-surface",
      "priority_rank": 6,
      "area": "cli",
      "mismatch_kind": "resolved_differential_runner",
      "severity": "resolved",
      "status": "resolved",
      "reopened_date": "2026-05-18T10:07:45Z",
      "resolution_date": "2026-05-18T19:37:26Z",
      "closure_bead": "bd-7derw",
      "sources": [
        "docs/dropin-112-feature-inventory-matrix.md#section:5-slash-commands"
      ],
      "final_state": "tests/dropin_slash_differential.rs now requires real mirrored Rust Pi/pi-mono RPC success for every credential-free RPC-observable slash scenario. UI-only, process-exit, invalid parser, and model-dependent compaction scenarios are explicit policy exclusions from pass evidence and continue to fail closed if counted.",
      "release_claim_impact": "No longer blocks strict drop-in replacement claims. G04 and G10 may rely on the real mirrored slash-command differential evidence for the credential-free pass-evidence set.",
      "closure_path": [
        "Provisioned the pinned legacy pi-mono runtime on the RCH worker used for the proof so legacy_pi_mono_code/pi-mono/node_modules/tsx/dist/cli.mjs is runnable.",
        "Required pass evidence to come only from slash inputs that map to credential-free shared RPC commands.",
        "Kept UI-only, process-exit, invalid parser, and model-dependent compaction scenarios fail-closed and out of pass evidence with explicit observability policy.",
        "Regenerated docs/evidence/dropin-differential-evidence-suite.json and docs/evidence/dropin-certification-verdict.json after the runner produced non-synthetic pass evidence."
      ],
      "verification_evidence": [
        "rch exec -- cargo test --test dropin_slash_differential -- --nocapture passed 12/12 on ts2 at 2026-05-18T19:37:26Z",
        "tests/dropin_slash_differential.rs: test_slash_command_differential_harness_fails_closed_without_mirrored_success requires real mirrored pass evidence",
        "tests/dropin_slash_differential/mod.rs: scenario_requires_pass_evidence and slash_command_observability define the pass-evidence policy",
        "tests/dropin_slash_differential/mod.rs: Rust Pi and pi-mono are driven through mirrored JSONL RPC sequences",
        "docs/evidence/dropin-differential-evidence-suite.json: slash_command_differential status pass"
      ],
      "blocked_by": [],
      "owner_issue_primary": "bd-7derw",
      "owner_issue_supporting": [
        "bd-jgnx0",
        "bd-3meug",
        "bd-35t7i"
      ]
    },
    {
      "gap_id": "gap-extension-hook-lifecycle-coverage",
      "priority_rank": 7,
      "area": "extensions",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-05-01T22:12:48Z",
      "sources": [
        "docs/dropin-112-feature-inventory-matrix.md#section:10-extension-events-hook-points"
      ],
      "final_state": "Lifecycle hook parity is covered by tests/extensions_event_wiring.rs and the generated lifecycle_hook_parity_matrix.json evidence artifact. The proof covers startup, agent_start, input transforms, before_agent_start system-prompt mutation, user_bash first-result behavior, tool_call/tool_result ordering, agent_end, and cancellable session_before_switch/session_before_fork/session_before_compact/session_before_tree hooks.",
      "user_impact": "Lifecycle hook parity is now regression-covered for extension startup, user, agent, tool, and session-tree hook families.",
      "owner_issue_primary": "bd-wz2sg.4",
      "owner_issue_supporting": [
        "bd-2xalc",
        "bd-3meug",
        "bd-359pl"
      ],
      "closure_bead": "bd-wz2sg.4",
      "closure_path": [
        "Extend lifecycle hook coverage to user and pre-agent hook families.",
        "Cover session tree cancellation alongside switch/fork/compact cancellable paths.",
        "Regenerate the deterministic lifecycle hook parity matrix artifact."
      ],
      "verification_evidence": [
        "tests/extensions_event_wiring.rs::lifecycle_hook_parity_matrix_writes_evidence_artifact",
        "tests/ext_conformance/reports/lifecycle_hooks/lifecycle_hook_parity_matrix.json",
        "src/extensions_js.rs::__pi_dispatch_event_inner"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-tool-io-limit-divergence",
      "priority_rank": 8,
      "area": "tools",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-04-22T19:10:00Z",
      "sources": [
        "docs/dropin-112-feature-inventory-matrix.md#section:4-built-in-tools"
      ],
      "final_state": "DEFAULT_MAX_BYTES aligned to 1,000,000 bytes in Rust tool/runtime defaults.",
      "alternative_solution": "N/A - full parity achieved for tool I/O limit configuration.",
      "owner_issue_primary": "bd-2xalc",
      "owner_issue_supporting": [
        "bd-b4s4l",
        "bd-35t7i"
      ],
      "closure_path": [
        "Decide canonical drop-in default and compatibility guardrails in bd-35t7i.",
        "Implement/tool-wire alignment under integration parity in bd-2xalc.",
        "Capture cross-size behavioral tests for truncation/error parity."
      ],
      "verification_evidence": [
        "tests/dropin_tool_io_differential.rs exercises tool I/O threshold boundaries, process lifecycle timeout cleanup, and SSE framing",
        "tests/dropin_tool_io_differential/g09_tool_io_scenarios.json defines the executable G09 parity scenario matrix",
        "Documented default values in parity spec"
      ],
      "blocked_by": [
        "bd-35t7i"
      ]
    },
    {
      "gap_id": "gap-config-defaults-compaction-retry",
      "priority_rank": 9,
      "area": "config",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-04-22T18:35:00Z",
      "sources": [
        "docs/dropin-112-feature-inventory-matrix.md#section:6-configuration-settings-compaction-retry"
      ],
      "final_state": "Compaction.reserveTokens and retry base/max delay defaults now match TS (16384/2000/60000) and docs are aligned.",
      "alternative_solution": "N/A - full parity achieved for compaction/retry configuration defaults.",
      "owner_issue_primary": "bd-uuf2z",
      "owner_issue_supporting": [
        "bd-b4s4l"
      ],
      "closure_path": [
        "Audit default provenance and precedence in bd-uuf2z.",
        "Align runtime behavior in session/compaction paths via bd-b4s4l.",
        "Pin expected defaults in spec docs and tests."
      ],
      "verification_evidence": [
        "Config precedence tests proving TS-equivalent defaults",
        "Session behavior diffs for retry/compaction with unset config",
        "Updated settings parity table"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-config-ui-editor-knobs",
      "priority_rank": 10,
      "area": "config",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-05-10T07:15:00Z",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:config.ui_editor",
        "docs/dropin-config-surface-diff.json"
      ],
      "final_state": "UI/editor-related legacy knobs are parsed through camelCase aliases and recorded as pass in the config surface diff evidence.",
      "closure_bead": "bd-uuf2z",
      "closure_reason": "DROPIN-142 closed after config/env precedence parity validation; current config surface diff marks quietStartup, collapseChangelog, doubleEscapeAction, editorPaddingX, autocompleteMaxVisible, showHardwareCursor, sessionPickerInput, and lastChangelogVersion as pass.",
      "owner_issue_primary": "bd-uuf2z",
      "owner_issue_supporting": [
        "bd-3meug"
      ],
      "closure_path": [
        "Create per-knob parity checklist and implementation status in bd-uuf2z.",
        "Connect any CLI-triggered behaviors in bd-3meug.",
        "Add integration tests for representative UI/editor knob effects."
      ],
      "verification_evidence": [
        "docs/dropin-config-surface-diff.json: legacy_settings_fields marks the UI/editor knobs as pass",
        "src/config.rs: camel_case_aliases_are_parsed covers quietStartup, collapseChangelog, doubleEscapeAction, editorPaddingX, autocompleteMaxVisible, sessionPickerInput, and related aliases",
        "bd-uuf2z close evidence: config_precedence suite 105/105 passing"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-config-markdown-indent",
      "priority_rank": 11,
      "area": "config",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-04-22T18:36:00Z",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:config.markdown"
      ],
      "final_state": "markdown.codeBlockIndent is implemented and wired for interactive + print rendering; inventory/docs updated.",
      "alternative_solution": "N/A - full parity achieved for markdown configuration options.",
      "owner_issue_primary": "bd-uuf2z",
      "owner_issue_supporting": [
        "bd-3cqgd"
      ],
      "closure_path": [
        "Confirm TS semantics for markdown.codeBlockIndent in parity notes.",
        "Implement or explicitly document non-support with certification sign-off.",
        "Add snapshot tests for markdown output formatting."
      ],
      "verification_evidence": [
        "Config load/serialize tests for markdown.codeBlockIndent",
        "Markdown rendering snapshots with varied indentation settings",
        "Decision logged in drop-in spec artifacts"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-env-pi-ai-antigravity-version",
      "priority_rank": 12,
      "area": "config_and_env",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-05-10T07:15:00Z",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:env.contracts.pi_ai_antigravity_version",
        "src/providers/gemini.rs",
        "src/http/client.rs"
      ],
      "final_state": "PI_AI_ANTIGRAVITY_VERSION is classified as the google-antigravity user-agent version component for Google CLI/Antigravity routing.",
      "closure_bead": "bd-uuf2z",
      "closure_reason": "DROPIN-142 config/env parity closure covers representative env precedence, while current provider/http code consumes PI_AI_ANTIGRAVITY_VERSION in the Antigravity request path.",
      "owner_issue_primary": "bd-uuf2z",
      "owner_issue_supporting": [
        "bd-3cqgd",
        "bd-hx9ks"
      ],
      "closure_path": [
        "Classify whether variable is required, optional passthrough, or deprecated for strict parity.",
        "Implement equivalent handling or an explicit compatibility policy.",
        "Document final semantics and migration notes."
      ],
      "verification_evidence": [
        "src/providers/gemini.rs reads PI_AI_ANTIGRAVITY_VERSION for google-antigravity request user_agent formatting",
        "src/http/client.rs antigravity_user_agent_format and antigravity_user_agent_in_request_headers cover request-header behavior",
        "bd-uuf2z close evidence: config_precedence suite 105/105 passing"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-provider-support-verification",
      "priority_rank": 13,
      "area": "providers",
      "mismatch_kind": "resolved",
      "severity": "resolved",
      "status": "resolved",
      "resolution_date": "2026-05-10T07:15:00Z",
      "sources": [
        "docs/provider-native-parity-report.json",
        "docs/providers.md"
      ],
      "final_state": "Provider parity has current executable evidence: native/provider metadata verification is green, preset providers are covered by shared tests, and provider coverage docs reflect the current native module inventory.",
      "closure_bead": "bd-2xalc",
      "closure_reason": "DROPIN-145 and later provider coverage refreshes converted the stale provider unknowns into evidence-backed provider tables and executable verification reports.",
      "owner_issue_primary": "bd-2xalc",
      "owner_issue_supporting": [
        "bd-uuf2z",
        "bd-8t27h.7"
      ],
      "closure_path": [
        "Verify provider availability and auth/env wiring against pinned TS baseline.",
        "Classify each unknown as implemented, intentionally unsupported, or missing.",
        "Route missing support to implementation beads or explicit compatibility waivers."
      ],
      "verification_evidence": [
        "docs/provider-native-parity-report.json: provider_native_verify 206/206 green and provider_metadata_comprehensive 112/112 green",
        "docs/provider-native-parity-report.json: 29 VCR-verified providers plus 55 preset providers covered by shared tests",
        "docs/providers.md: current native provider module table and traceability guard from bd-8t27h.7"
      ],
      "blocked_by": []
    },
    {
      "gap_id": "gap-rust-superset-governance",
      "priority_rank": 14,
      "area": "governance",
      "mismatch_kind": "waived_non_blocking_superset",
      "severity": "waived",
      "status": "waived",
      "waiver_date": "2026-05-10T07:15:00Z",
      "waiver_decision_bead": "bd-35t7i",
      "sources": [
        "docs/evidence/dropin-feature-inventory-matrix.json#row:cli.flags.rust_only",
        "docs/evidence/dropin-feature-inventory-matrix.json#row:cli.subcommands.rust_only",
        "docs/evidence/dropin-feature-inventory-matrix.json#row:config.rust_additional_policy_knobs",
        "docs/dropin-112-feature-inventory-matrix.md#summary:features-in-rust-not-in-ts"
      ],
      "final_state": "Rust-only flags, subcommands, and policy knobs are accepted as non-blocking supersets when defaults remain compatible and strict release wording remains gated by the certification verdict.",
      "waiver_reason": "The hard certification contract explicitly blocks strict drop-in release language unless docs/evidence/dropin-certification-verdict.json reports overall_verdict = CERTIFIED; rust-only supersets are not a behavioral blocker when unused.",
      "release_claim_impact": "No strict replacement claim may rely on these supersets directly; strict wording remains governed by the certification verdict.",
      "owner_issue_primary": "bd-35t7i",
      "owner_issue_supporting": [
        "bd-hx9ks",
        "bd-3cqgd"
      ],
      "closure_path": [
        "Define policy for acceptable supersets under strict drop-in certification.",
        "Ensure supersets are non-breaking and gated behind explicit opt-in where needed.",
        "Align documentation language and certification criteria."
      ],
      "verification_evidence": [
        "docs/contracts/dropin-certification-contract.json: strict replacement requires CERTIFIED verdict",
        "docs/evidence/dropin-certification-verdict.json: current overall_verdict = CERTIFIED and blocking_reasons is empty",
        "docs/integrator-migration-playbook.md and docs/testing-policy.md keep strict drop-in language gated by the certification verdict"
      ],
      "blocked_by": []
    }
  ],
  "coverage_mapping": {
    "inventory_rows_requiring_ledger": [
      {
        "row_id": "mode.sdk.embedding",
        "status": "partial_contract_shape_diff",
        "ledger_gap_id": "gap-sdk-contract-shape"
      },
      {
        "row_id": "cli.extensions.dynamic_flags",
        "status": "partial_in_progress",
        "ledger_gap_id": "gap-cli-extension-flag-pass-through"
      },
      {
        "row_id": "json.events.auto_lifecycle",
        "status": "resolved",
        "ledger_gap_id": "gap-json-auto-lifecycle-events"
      },
      {
        "row_id": "config.ui_editor",
        "status": "resolved",
        "ledger_gap_id": "gap-config-ui-editor-knobs"
      },
      {
        "row_id": "config.markdown",
        "status": "resolved",
        "ledger_gap_id": "gap-config-markdown-indent"
      },
      {
        "row_id": "env.contracts.pi_ai_antigravity_version",
        "status": "resolved",
        "ledger_gap_id": "gap-env-pi-ai-antigravity-version"
      }
    ],
    "summary_divergence_items_requiring_ledger": [
      {
        "summary_item": "Agent events auto_compaction/auto_retry parity",
        "ledger_gap_id": "gap-json-auto-lifecycle-events"
      },
      {
        "summary_item": "Slash command parity unknowns",
        "ledger_gap_id": "gap-cli-slash-command-surface"
      },
      {
        "summary_item": "RPC command parity unknowns",
        "ledger_gap_id": "gap-json-rpc-command-semantic-coverage"
      },
      {
        "summary_item": "Extension hook-point parity coverage",
        "ledger_gap_id": "gap-extension-hook-lifecycle-coverage"
      },
      {
        "summary_item": "Extension UI method parity unknowns",
        "ledger_gap_id": "gap-json-tool-and-extension-ui-events"
      },
      {
        "summary_item": "Provider support unknowns",
        "ledger_gap_id": "gap-provider-support-verification"
      },
      {
        "summary_item": "Tool byte-limit divergence",
        "ledger_gap_id": "gap-tool-io-limit-divergence"
      }
    ]
  },
  "rollup": {
    "entry_count": 14,
    "severity_counts": {
      "high": 0,
      "medium": 0,
      "low": 0,
      "resolved": 12,
      "waived": 1,
      "retired": 1
    },
    "top_unblockers": [
      "bd-35t7i",
      "bd-3meug",
      "bd-uuf2z",
      "bd-2xalc"
    ],
    "notes": [
      "All currently identified mismatches from inventory sources are mapped to explicit owner issues, closure evidence, or a deliberate non-blocking waiver.",
      "Closed enabling beads (bd-2ilgm, bd-2km0n) are retained as supporting references where they affected gap state.",
      "Medium/low stale gaps were reconciled by bd-8t27h.8 on 2026-05-10; strict release claims remain gated by docs/evidence/dropin-certification-verdict.json.",
      "Any new mismatch discovery should append a new ledger entry and update coverage_mapping."
    ]
  }
}