feat(artifact): add run timing evidence to downloadable conversation artifacts

[henrypark133]

Summary

• Adds a timings block to the user-downloadable run/thread artifact JSON: per-iteration inference duration, per-tool duration, tool-call counts, and run totals — so a bug report carries timing evidence instead of the user saying "it felt slow".
• Adds a durable floor: per-message created_at/updated_at are now exported. They were already loaded from the database and thrown away. These survive a restart, so an artifact downloaded a day later still shows step-to-step gaps even when the exact timings are gone.
• No database changes, no new persistence, no migrations, no agent-loop changes. Every number already existed — this PR only projects them into the export at read time.
• The timing block carries no prompt text, no tool arguments, no tool results. Names, statuses, counts, durations only.
• Schema constants deliberately stay at v1 (see Compatibility).

The problem

A user hits a 90-second turn, clicks "download this run", and attaches the JSON to a bug report. Today that file contains the messages, run status, usage and cost, and a best-effort tail of process logs — and no timing at all. You cannot tell from it whether the turn was one slow inference or twelve fast tool calls. The artifact does not even carry message timestamps.

The measurements already exist. The agent loop stopwatches both halves of every iteration and writes them to a process-local operator "inspector" store:

• ModelCallDiagnostic { iteration, started_at, completed_at, duration_ms, status, usage } — inference time, per loop iteration (ironclaw_product_contracts/src/inspector.rs:643)
• ToolExecutionDiagnostic { model_call_id, capability_name, duration_ms, status } — per tool, with model_call_id attributing each tool call to the iteration that requested it (:732)
• SessionDiagnosticStats { total_model_calls, total_tool_calls, failed_tool_calls, total_latency_ms } (:920)

The gap was never "we don't measure it" — it was "the measurements never reach the file the user downloads". RebornServices already holds the store (reborn_services.rs:2381); production already wires it (product_surface.rs:98). This PR connects the two at export time.

Design: two lanes, deliberately

The one real question was what happens when the user downloads the bundle an hour later, after a restart or after the bounded store evicted that run. The answer is two lanes with different durability:

Lane	Source	Precision	Survives restart
Exact	InMemoryDiagnosticStore	per-iteration inference ms, per-tool ms, totals	❌
Durable floor	persisted ThreadMessageRecord timestamps	wall-clock gaps between steps	✅

So the user's report is never empty. Same process, run still resident → both lanes. After a restart or eviction → timings.available: false with unavailable_reason, and the message timestamps still give step-to-step gaps. This mirrors the honesty convention the artifact's existing logs block already uses (available / complete: false on a process-local buffer).

A durable diagnostics store was explicitly considered and deferred — it means a new persisted schema, retention policy, dual-backend conformance tests, and a redaction pass over bounded text. Out of scope here.

Shape of the output

{
  "schema": "ironclaw.run_artifact.v1",
  "messages": [
    { "message_id": "…", "sequence": 1, "kind": "User",
      "created_at": "2026-08-18T10:00:00Z", "updated_at": "2026-08-18T10:00:00Z" }
  ],
  "timings": {
    "source": "diagnostic_store",
    "available": true,
    "complete": false,               // always false — see Ceiling
    "iterations": [
      { "iteration": 1, "model": "…", "started_at": "…", "completed_at": "…",
        "inference_ms": 41000, "status": "succeeded",
        "tool_calls": 2, "tool_ms_total": 22030,
        "tools": [ { "capability_name": "builtin.http", "duration_ms": 22000,
                     "status": "succeeded" } ] }
    ],
    "unattributed_tools": [],        // tools whose parent model call is unknown — counted, never dropped
    "totals": { "iterations": 3, "tool_calls": 3, "failed_tool_calls": 0,
                "inference_ms": { "known_total": 68000, "unavailable_samples": 0 },
                "tool_ms": 22030, "wall_clock_ms": 91000 }
  }
}

When the run is gone: { "source": "diagnostic_store", "available": false, "unavailable_reason": "run_not_resident", "iterations": [], "totals": { …, "wall_clock_ms": 91000 } } — note wall_clock_ms survives, because it comes from the durable lane.

totals.inference_ms reuses the contract's DiagnosticMetricTotal { known_total, unavailable_samples } rather than flattening to a number, because unavailable_samples is what distinguishes "fast" from "unmeasured".

Architecture

File	Role
run_artifact/timings.rs	Pure projection: DiagnosticSnapshot → RunArtifactTimings. No I/O, unit-tested.
timings_source.rs	The one impure edge: reads the store, maps outcomes to unavailable_reason, never returns an error.
run_artifact.rs / thread_artifact.rs	Assemblers gain the field and call the reader.

Split deliberately so the grouping logic gets cheap unit tests while the store read stays a thin shell. Authorization is unchanged: the diagnostic scope is keyed off the already-authorized caller, and the admin thread-scrape route rebinds the caller to the target user upstream (thread_scrape_subject), so it needs no special case.

Notable decisions

• Schema stays v1. scripts/import-reborn-run-artifact.py:77 exact-matches the version strings and frontend fixtures hardcode them. Every added field is optional with #[serde(default)], so old artifacts still deserialize and the QA importer keeps working on both. Bumping to v2 would have broken it for zero reader benefit.
• wall_clock_ms is approximate — run.received_at to the newest message updated_at. It folds in persistence latency; documented in-code as such. Deriving it this way avoided widening the change into turn state.
• A per-run scoping bug was caught in review and fixed (19381bcb3): the thread artifact initially computed wall_clock_ms against the whole thread's messages rather than the current run's, which would have inflated every run except the last in a multi-run thread — the exact metric this PR exists to deliver. Fixed by bucketing messages by run id in a single pass, and pinned by a regression test.
• No #[allow(dead_code)] anywhere. The projection was briefly unreferenced between commits; the suppression was removed once a real caller existed rather than left to rot.

Ceiling (marked in code, not hidden)

complete is hardcoded false with a ponytail: comment naming the limit and the upgrade path. Exact timings live in the process-local, bounded InMemoryDiagnosticStore — whose own module doc says it "deliberately has no persistence backend" (inspector_store.rs:3) — capped by DiagnosticStoreLimits. A restart or eviction removes a run's timings with no durable marker, exactly like the sibling RunArtifactLogs.complete.

Change Type

• New feature

Linked Issue

None.

Validation

• cargo fmt --all -- --check
• cargo clippy --all --benches --tests --examples --all-features -- -D warnings
• cargo build
• cargo test -p ironclaw_assistant
• cargo test -p ironclaw_webui
• cargo test -p ironclaw_architecture_tests — PASS. Required because a commit edits crates/product/ironclaw_assistant/AGENTS.md, which AGENTS.md names as a trigger for this suite.
• RUST_MIN_STACK=67108864 cargo test -p ironclaw_integration_tests — PASS, 1933 passed / 0 failed. Note the env var: generated_gate_sequences_preserve_lifecycle_invariants overflows its stack without it, which is why CI sets the same value (.github/workflows/reborn-tests.yml). Unrelated to this change — the branch touches neither that test nor its inputs.
• Manual testing: not applicable — behavior is exercised through the artifact export seam by automated tests.

Test Strategy

User behavior: A user hits a slow turn, downloads the run, and attaches the JSON to a bug report. After this change it shows which loop iteration spent how long in inference, the run's wall-clock, and — when the run is still resident — per-tool durations.

Integration tier: tests/integration/run_artifact_timings.rs drives the real WebUI v2 router through RebornServices, asserting at the export seam rather than on run status. Two scenarios: (1) store attached → available: true, iterations.len() matches the scripted model calls, inference_ms and wall_clock_ms present; (2) store absent — the post-restart / evicted case → available: false, unavailable_reason: "run_not_resident", durable message timestamps still present.

Crate tier: run_artifact/timings.rs unit-tests the pure projection — tool-to-iteration grouping by model_call_id, the unattributed bucket for tools whose parent call is unknown or dangling, iteration ordering, saturating arithmetic, and the no-payload-text security property (a leaky record is injected and the secret asserted absent from the serialized output). timings_source.rs unit-tests derive_wall_clock_ms including the negative/clock-disagreement path. reborn_services_contract.rs covers the store-error branch — a failing DiagnosticStorePort double proves a store outage never fails the export — plus the multi-run-thread regression test.

Not covered — known gap. Tool-execution timings are not asserted at the integration tier. The integration harness has no tool diagnostic sink: staged_capability_io_for_test / staged_capability_io_with_observer_for_test (crates/app/ironclaw_composition/src/runtime/capability_host.rs:640,659) hardcode tool_diagnostic_sink: None, unlike production's capability_wiring (runtime.rs:3488). The prompt sink is wired, so inference timings are observable; tool durations are not. Rather than soften assertions to make them pass, those assertions were deleted, and tool-call grouping is covered at crate tier instead. Follow-up: wire a tool diagnostic sink through that test-support seam. Doing it here would have meant changing a production composition crate, which was out of scope.

Compatibility and rollback

• Every new field is optional and #[serde(default)]; artifacts downloaded before this change still deserialize.
• Rollback is a straight revert. No persisted state, no migration, nothing to undo.
• Security: the timing block adds nothing for the redaction pipeline to cover, because no free text crosses into it.

Layers touched

ironclaw_assistant (artifact assemblers, timing projection, store reader), ironclaw_webui (contract-test fixtures only — no handler or route change), the integration-test harness (shares one diagnostic store between the loop and product services, mirroring production wiring), plus an AGENTS.md module-charter row required by the reborn_services_module_charter gate.

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📝 Walkthrough

Summary by CodeRabbit

• New Features

  • Added timing details to exported run and thread artifacts, including per-iteration, tool, aggregate, and wall-clock measurements.
  • Preserved message creation and update timestamps in exported artifacts.
  • Added privacy-focused timing summaries that exclude prompts, tool arguments, and results.
  • Added graceful fallback states when timing data is unavailable, evicted, or inaccessible.

• Bug Fixes

  • Improved scheduled routine replay behavior to prevent duplicate executions.

• Tests

  • Added coverage for timing calculations, timestamp preservation, run isolation, redaction, fallback behavior, and WebUI export flows.

Walkthrough

Run-artifact exports now include projected diagnostic timings, per-run thread timings, durable message timestamps, unavailable-state handling, shared diagnostic-store wiring, and contract and integration tests. A replay test adjusts forced trigger timing.

Changes

Run-artifact timing exports

Layer / File(s)	Summary
Timing contracts and projection crates/product/ironclaw_assistant/src/inspector_store.rs, crates/product/ironclaw_assistant/src/reborn_services/run_artifact/timings.rs, crates/product/ironclaw_assistant/src/lib.rs, crates/product/ironclaw_assistant/src/reborn_services.rs	Adds reduced diagnostic snapshots, serializable timing models, and artifact-safe timing projections.
Artifact timing integration crates/product/ironclaw_assistant/src/reborn_services/run_artifact.rs, crates/product/ironclaw_assistant/src/reborn_services/timings_source.rs, crates/product/ironclaw_assistant/src/reborn_services/thread_artifact.rs, crates/product/ironclaw_assistant/AGENTS.md	Retrieves timing data, derives wall-clock duration, attaches per-run timings, and preserves message timestamps.
Shared diagnostic-store wiring tests/integration/support/group.rs, tests/integration/support/builder.rs, tests/integration/wiring_parity.rs	Retains one shared diagnostic store and exposes it for diagnostic read-back tests.
Contract and integration validation crates/product/ironclaw_assistant/tests/reborn_services_contract.rs, crates/product/ironclaw_webui/tests/webui_v2_handlers_contract.rs, tests/integration/run_artifact_timings.rs, Cargo.toml, tests/CLAUDE.md	Registers the integration target and covers unavailable states, timestamps, multi-run isolation, fixtures, schema compatibility, and router-level exports.

QA replay scheduling

Layer / File(s)	Summary
Replay trigger due-time adjustment tests/reborn_qa_recorded_behavior.rs	Sets the forced trigger time to now to avoid rescheduling a cron trigger behind the current boundary.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: 🟡 Moderate · up to 8ca38

The PR adds timing evidence to downloadable artifacts, but the current head can omit or misattribute timing data, retain more diagnostic payload than intended, and contains timing tests that may fail or panic because their identifiers do not match generated runs. Merge should wait until these bounded correctness, data-handling, and test reliability issues are fixed or explicitly accepted.

Sequence Diagram(s)

sequenceDiagram
  participant WebUIv2Router
  participant RunArtifactExport
  participant timings_source
  participant DiagnosticStore
  participant RebornRunArtifact
  WebUIv2Router->>RunArtifactExport: request artifact export
  RunArtifactExport->>timings_source: request run timing projection
  timings_source->>DiagnosticStore: read diagnostic timing snapshot
  DiagnosticStore-->>timings_source: return snapshot or unavailable state
  timings_source-->>RunArtifactExport: return timings and wall-clock duration
  RunArtifactExport->>RebornRunArtifact: attach timings and timestamps
  RebornRunArtifact-->>WebUIv2Router: serialize artifact

Loading

Possibly related PRs

• nearai/ironclaw#7230: Provides diagnostic-store APIs extended by this change.
• nearai/ironclaw#7277: Provides diagnostic model-call statistics consumed by timing projections.
• nearai/ironclaw#7279: Provides tool execution data consumed by timing projections.

Suggested reviewers: serrrfirat

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the feature and validation, but it omits required template sections and lists no linked issue for a new feature.	Add an approved linked issue and complete Security Impact, Trust-Boundary Checklist, Database Impact, Blast Radius, Rollback Plan, Review Follow-Through, and Review track sections.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title follows Conventional Commits style and clearly describes the artifact timing feature.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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🚅 Deployed to the ironclaw-pr-7735 environment in ironclaw-ci-preview

Service	Status	Web	Updated (UTC)
ironclaw	✅ Success (View Logs)	Web	Aug 19, 2026 at 4:12 am

[ironloopai]

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Run details

Run: b8ad7925-fc0a-4e92-8e86-6a389134c5bf
Base: main at a7f813d
Head: feat/run-artifact-timings at 581b6de
Created: 2026-08-18 22:25 UTC
Updated: 2026-08-18 22:26 UTC

[ironloopai]

🔍 IronLoop review

🟢 No actionable findings

Reviewed the complete change and found no actionable defects. Timing projection, caller scoping, restart/eviction behavior, timestamp export, redaction boundaries, and shared diagnostic-store wiring are internally consistent.

Validation

• ✅ Static review — Inspected all changed production paths, tests, integration wiring, compatibility handling, and captured review feedback.
• ✅ Captured CI evidence — Relevant completed checks include Reborn root/group tests, deterministic checks, Windows build and clippy, benchmark compilation, regression enforcement, and docs publication boundary.

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• Workflow: Review
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[chatgpt-codex-connector]

Preserve model-call IDs before grouping tool timings

In production, every captured tool reaches this branch with model_call_id: None: InMemoryDiagnosticStore::record_tool_started initializes that field to None, and record_tool_result merely copies it, while the host-managed tool captures provide no model-call identifier. Consequently, any real run containing tools places all of them in unattributed_tools and reports iterations[].tool_calls as 0 with no per-iteration tool duration, so the advertised iteration breakdown only works for the synthetic unit fixtures that manually supply Some(call_id). Carry the parent model-call correlation through the production capture/store path before grouping here.

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[henrypark133]

Needs human scope confirmation. Current code verifies the concern: host-managed tool starts create ToolExecutionDiagnostic records with model_call_id: None, and result capture preserves that value, so production tools remain unattributed and per-iteration tool counts stay zero. Correctly fixing this requires carrying the parent model-call correlation across the loop-host/capability-host capture boundary. I left this thread open rather than changing that cross-crate contract in this pass.

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Actionable comments posted: 1

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Inline comments:
In `@crates/product/ironclaw_assistant/src/reborn_services/timings_source.rs`:
- Around line 15-17: Update the imports in the timings source module to use
crate-qualified paths for RunArtifactMessage, RunArtifactTimings,
project_timings, unavailable, ProductCapabilityInvoker, and RebornServices under
crate::reborn_services, removing the production super:: imports while preserving
the same referenced symbols.

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📒 Files selected for processing (15)

• Cargo.toml
• crates/product/ironclaw_assistant/AGENTS.md
• crates/product/ironclaw_assistant/src/lib.rs
• crates/product/ironclaw_assistant/src/reborn_services.rs
• crates/product/ironclaw_assistant/src/reborn_services/run_artifact.rs
• crates/product/ironclaw_assistant/src/reborn_services/run_artifact/timings.rs
• crates/product/ironclaw_assistant/src/reborn_services/thread_artifact.rs
• crates/product/ironclaw_assistant/src/reborn_services/timings_source.rs
• crates/product/ironclaw_assistant/tests/reborn_services_contract.rs
• crates/product/ironclaw_webui/tests/webui_v2_handlers_contract.rs
• tests/CLAUDE.md
• tests/integration/run_artifact_timings.rs
• tests/integration/support/builder.rs
• tests/integration/support/group.rs
• tests/integration/wiring_parity.rs

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[henrypark133]

Code Review (multi-agent)

Intent: Add timing evidence and durable message timestamps to downloadable conversation artifacts without changing persistence or agent-loop behavior.

Emission: GitHub disallows REQUEST_CHANGES from the PR author, so these findings are posted as a comment review.

Stats: 8 findings (from 9 raw, 9 after filter, 8 after dedup) across 6 files. Reviewers run: correctness, security, performance, design, coverage. Reviewers failed: none. Body-only: 0

One design candidate about omitted unavailable thread timing entries was not posted because the implementation explicitly documents that omission as intentional.

harness-coupling

1. Medium Diagnostic wiring parity test is tautological (tests/integration/wiring_parity.rs:228-240, confidence 98) — anchor: tests/integration/wiring_parity.rs:234

   The test calls diagnostic_store() twice and compares the same field returned by that accessor. It never causes the loop to write diagnostics or reads the store afterward, so reverting prompt_diagnostic_sink to a separate throwaway store would still leave this test green.

   Fix: Submit a scripted model turn, snapshot the returned store, and assert that it contains the model-call diagnostic written by the loop.

local-patterns

1. Medium Re-export the public type used by RebornThreadArtifact (crates/product/ironclaw_assistant/src/reborn_services/thread_artifact.rs:40-46, confidence 94) — anchor: crates/product/ironclaw_assistant/src/reborn_services.rs:309

   RebornThreadArtifact exposes RunArtifactRunTimings in a public field, but the type remains inside the private thread_artifact module and is not re-exported from reborn_services or lib.rs. External Rust consumers cannot name this DTO consistently with the other artifact types, and the public API surface is incomplete.

   Fix: Re-export RunArtifactRunTimings from thread_artifact through reborn_services and the crate root, matching the existing RunArtifact* re-exports.

performance

1. Medium Use a timing-only diagnostic read for artifact exports (crates/product/ironclaw_assistant/src/reborn_services/timings_source.rs:42-42, confidence 98) — anchor: crates/product/ironclaw_assistant/src/reborn_services/timings_source.rs:42

   The generic snapshot clones prompt and activity data under the diagnostic store lock, but project_timings discards both. Thread exports repeat this once per distinct run, causing unnecessary multi-megabyte copies and lock hold time.

   Fix: Add a diagnostic-store projection that clones only model_calls, tool_executions, and stats.

resource-exhaustion

1. Medium Avoid deep-copying every artifact message into timing buckets (crates/product/ironclaw_assistant/src/reborn_services/thread_artifact.rs:116-116, confidence 95) — anchor: crates/product/ironclaw_assistant/src/reborn_services/thread_artifact.rs:116

   The final artifact retains messages while messages_by_run also deep-clones every RunArtifactMessage, including content strings and nested tool-call JSON. At the 16 MiB thread bound this temporarily duplicates the full payload, and concurrent exports multiply the peak memory.

   Fix: Bucket message references or indices and compute per-run timestamp extrema without cloning message payloads.

tests

1. High Tool timings are never proven through production wiring (tests/integration/run_artifact_timings.rs:61-64, confidence 98) — anchor: tests/integration/run_artifact_timings.rs:62

   The integration harness sets tool_diagnostic_sink to None and deliberately asserts no tool fields. Pure projection tests fabricate diagnostics, so a regression in production capability-to-store wiring could remove per-tool durations and tool counts while all tests pass.

   Fix: Add exported_run_artifact_carries_tool_execution_timings through a harness with the production tool diagnostic sink, asserting per-tool duration and totals.

2. Medium Multi-run regression relies on a timing-sensitive sleep (crates/product/ironclaw_assistant/tests/reborn_services_contract.rs:8931-8939, confidence 94) — anchor: crates/product/ironclaw_assistant/tests/reborn_services_contract.rs:8938

   The regression test uses a real 150 ms sleep and then requires the measured span to stay below 100 ms. CI scheduling and persistence delays can make the same run exceed that threshold, producing a flaky failure unrelated to cross-run bucketing.

   Fix: Use deterministic message timestamps through a fixture or injectable clock, then assert the exact per-run spans without sleeping.

3. Medium Aggregate timing totals are not asserted (tests/integration/run_artifact_timings.rs:100-105, confidence 92) — anchor: tests/integration/run_artifact_timings.rs:101

   The route test checks only iteration count, wall-clock presence, and one inference duration. The projection test passes default SessionDiagnosticStats despite nonempty calls and tools, so totals.iterations, tool_calls, failed_tool_calls, inference known_total/unavailable_samples, and tool_ms are not proven at the export seam.

   Fix: Populate diagnostic stats in the production-wired route test and assert the serialized aggregate totals, including unavailable samples.

verification-evidence

1. Medium Claimed saturating-arithmetic coverage is absent (crates/product/ironclaw_assistant/src/reborn_services/run_artifact/timings.rs:280-292, confidence 99) — anchor: crates/product/ironclaw_assistant/src/reborn_services/run_artifact/timings.rs:292

   The PR claims the pure projection is unit-tested for saturating arithmetic, but every test uses small durations and the grouping test supplies default stats. No test would fail if either saturating_add call were replaced with overflowing addition.

   Fix: Add a projection test using u64::MAX plus another duration for both aggregate and per-iteration sums.

[henrypark133]

High — Tool timings are never proven through production wiring.

The integration harness sets tool_diagnostic_sink to None and deliberately asserts no tool fields. Pure projection tests fabricate diagnostics, so a regression in production capability-to-store wiring could remove per-tool durations and tool counts while all tests pass.

Fix: Add exported_run_artifact_carries_tool_execution_timings through a harness with the production tool diagnostic sink, asserting per-tool duration and totals.

[henrypark133]

Needs human scope confirmation. The integration harness intentionally passes tool_diagnostic_sink: None through its test-support capability-I/O constructor, while production runtime wiring supplies the sink. Non-vacuous tool timing coverage requires a composition/harness seam and depends on the model-call correlation concern above. I left this thread open because the PR documents this as a follow-up and expanding it changes the cross-crate test shape.

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[lloydmak99]

This adds run-timing evidence (per-iteration model-call latency, per-tool durations, aggregate totals, and wall-clock) plus durable message timestamps to downloadable run/thread artifacts, sourced from the process-local diagnostic store. The change is well-scoped, backward-compatible, and I found nothing merge-blocking.

Verified in particular:

• No payload leakage: the timing projection carries only capability names, counts, statuses, and durations — never prompt text or tool args/results (pinned by no_bounded_payload_text_reaches_the_projection).
• Backward compatibility: new fields are #[serde(default)]/skip_serializing_if, RUN_ARTIFACT_SCHEMA stays v1, and the new DiagnosticStorePort::timing_snapshot has a default impl so no existing implementor breaks.
• Correctness: scope keying matches the operator inspector; wall-clock derivation guards negative/missing timestamps (None rather than garbage); per-run isolation holds; no data deletion. Production wires the shared store (crates/app/ironclaw_composition/src/product_surface.rs:98), so the feature is live rather than inert.

Non-blocking follow-ups (optional):

• crates/product/ironclaw_assistant/src/reborn_services/run_artifact/timings.rs:~200: per-iteration tool_calls counts only tool executions still retained in the bounded store, so post-eviction it can under-report; totals.tool_calls stays authoritative and complete: false signals this. Worth ensuring downstream consumers read per-iteration counts as "retained", not "true".
• crates/product/ironclaw_assistant/src/reborn_services/thread_artifact.rs:172: group_messages_by_run silently drops a message whose run_id fails TurnRunId::parse (costs only that run's timing block; messages still export) — deliberate graceful degradation.

Checks: reviewed the full diff, prior comments, and structural verification via rg/sed against the checkout (scope keying, received_at type, store wiring, payload separation). Local cargo/clippy/test were not run (no warm target/, so a cold full build was skipped); green CI covers fmt, clippy (all-features), and the Reborn integration/QA/E2E suites that exercise this code.