fix(agent): separate append and completion authority in managed persistence

[kojiwakayama]

Managed ingress returns an opaque event writer, while persistence previously required its raw token and incorrectly reused that append credential for /complete. The API requires separate completion authority.

Add createManagedBrokerPersistenceFromCapability and createManagedBrokerTerminal. Append uses the writer's private run/endpoint/transport binding. The terminal factory privately binds independent API credentials and a completion operation to one copied canonical run. Frozen terminal handles cannot be relabeled, cloned or combined with another run's dispatcher; persistence rejects invalid or different-run authority before I/O. Provider callbacks receive no credential-bearing options as their receiver.

Migration: raw-constructor callers must provide a distinct completionAuthToken. Opaque-writer callers create a terminal with createManagedBrokerTerminal({ apiUrl, completionAuthToken, run, modelId, resolveProvider, fetch? }), then pass { capability, run, terminal } to persistence. Terminal handles stay in the trusted broker. The factory supports the API's ordinary /complete route, not the separately scoped detached-completion protocol.

Preserve canonical snake_case normalization, session ownership, cancellation retention, failed-terminal reporting and cleanup. Start the next 0.1.1259-rc line, with its regenerated hydration artifact, so an approved merge can publish for staging. Stabilize the existing transcript-scaling benchmark with five-sample medians and the original numeric limits; every invocation still verifies its output.

Validation: 71 focused persistence/broker steps and five import guards pass, including red/green cross-run binding and API credential-separation regressions. Pure denial cases run in unit coverage; local changed-code coverage estimates 95.5%. Broader application/version tests, release helpers, full typecheck, generated manifests/references, lint, format, layout and dependency checks pass. Native/prototype probes and all nine packaged journeys run only in GitHub CI. Fresh current-head CI and review are required.

Supports veryfront/veryfront-issue-inbox#1037. Consumer rollout, full product composition and deployed isolation acceptance remain outstanding.

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📦 Client bundle boundary

Entrypoint	Modules	Source size	Server leaks
src/index.client.ts	289	2307 KiB	✅ 0

A server module in a client graph aborts hydration in the browser. New leaks fail CI; known leaks are tracked in scripts/lint/client-bundle-baseline.json to burn down.

[coderabbitai]

📝 Walkthrough

Walkthrough

Managed broker persistence now separates append and completion credentials, accepts run-bound terminal adapters, and validates authority before use. Tests, exports, documentation, version metadata, and transcript cleanup timing coverage are updated.

Changes

Managed broker authority separation

Layer / File(s)	Summary
Persistence authority contract src/agent/hosted/managed-broker-persistence.ts	The constructors validate independent completion credentials and run-bound terminal adapters. Completion state uses the supplied terminal.
Authority validation and transport coverage src/agent/hosted/managed-broker-persistence.test.ts, tests/integration/agent/managed-broker-persistence.test.ts, src/agent/hosted/managed-executor-broker.test.ts, tests/e2e/agent/managed-broker/journey.mjs	Tests cover authority validation, canonical run input, existing persistence behavior, pinned transport, and separate append and completion credentials.
Public surface and persistence documentation src/agent/service/managed-broker.ts, docs/api-reference/veryfront/agent.md, docs/guides/agent-service-runtime.md	The capability constructor and terminal type are exported and documented. Runtime guidance describes the separate authority requirements.

Transcript cleanup timing coverage

Layer / File(s)	Summary
Scaling measurement test src/agent/child-run/result-summary.test.ts	The test uses repeated interleaved samples, median durations, maximum-duration limits, and detailed assertion output.

Release metadata update

Layer / File(s)	Summary
Release candidate version deno.json, src/utils/version-constant.ts	The version is updated to 0.1.1259-rc.

Priority: ⚪ Not assessed

Estimated code review effort: 3 (Moderate) | ~25 minutes

Suggested reviewers: kwakayama

Sequence Diagram(s)

sequenceDiagram
  participant Handler
  participant createManagedBrokerPersistence
  participant createManagedBrokerPersistenceFromCapability
  participant PersistenceEndpoint
  Handler->>createManagedBrokerPersistence: provide append and completion credentials
  createManagedBrokerPersistence->>createManagedBrokerPersistenceFromCapability: pass append capability and run-bound terminal
  createManagedBrokerPersistenceFromCapability->>PersistenceEndpoint: append events with append authority
  createManagedBrokerPersistenceFromCapability->>PersistenceEndpoint: complete run with completion authority

Loading

Merge Risk: 🟠 High · up to f2f42

A relabeled completion terminal can finish a different run from the one receiving events, so the authority boundary should be corrected before merge. The new timing check can also fail intermittently under parallel CI load.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 10 functions across 9 files. (3 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the primary change: separating append authority from completion authority in managed persistence.

Full details: Docstring Coverage

Explanation

Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 10 functions across 9 files. (3 skipped: 3 unsupported.)

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[kwakayama]

Code Review: 90/100 — solid, security-conscious refactor; well tested

Summary: Adds createManagedBrokerPersistenceFromCapability so persistence can be driven by managed ingress's opaque run-event capability instead of a raw token, and rewires the existing createManagedBrokerPersistence to delegate to it. The change also fixes a real (pre-existing) credential-exposure bug as a side effect.

Strengths

• Genuine security fix, not just plumbing. createConversationHostedTerminalAdapter invokes options.resolveProvider(modelId) / options.onTerminalState?.(...) as method calls, so an unwrapped caller callback previously received the secret-bearing options object (containing authToken/apiUrl/fetch) as this. createHostedConversationTerminalFromCapability now wraps both callbacks in plain arrow functions before handing them to the adapter, and this path is shared by both the new capability constructor and the legacy token constructor — so old callers get the fix too. Test "does not expose private terminal options as callback receivers" verifies this === undefined for both callbacks.
• Capability boundary is enforced before any network work. createManagedBrokerPersistenceFromCapability validates the capability's pinned runId against the (parsed/copied) run projection synchronously; foreign-run and fabricated-capability inputs are rejected with zero fetch calls (verified explicitly in tests).
• Transport/credential pinning is real, not just typed. The dedicated test spreads extra apiUrl/runEventToken/fetch fields into the input and confirms the pinned capability's endpoint, bearer token, and transport are used regardless — and that the run mutated after construction (runId/conversationId) has no effect, since the projection is parsed/copied up front.
• Good API hygiene: old createManagedBrokerPersistence keeps its exact external contract by becoming a thin wrapper; managed-broker.ts re-exports the new function; docs (agent-service-runtime.md, generated agent.md reference) are updated in the same PR.
• Test suite runs the full existing scenario matrix against both constructors (table-driven over "token"/"capability"), plus new capability-specific cases — meaningfully raises confidence this is behavior-preserving, not just additive.

Minor / non-blocking

• ConversationRunProjection gets parsed twice per call (getConversationRunProjectionSchema().parse in createManagedBrokerPersistenceFromCapability, then again inside createHostedConversationTerminalFromCapability). Harmless (schema validation is cheap and the run is small) but slightly redundant — could pass the already-validated object through if you want to trim it.
• PR is still awaiting CI (CodeRabbit/Automated review show "pending" at review time) — description says local validation (types/lint/tests) passed, but worth confirming green CI before merge given mergeable_state: blocked.
• This is described as "framework composition" only, with the actual product-service wiring and staging isolation left for follow-up — reasonable to scope that way, but worth double-checking the follow-up work is tracked (issue Preserve ToolCallResult input in AG-UI replay fallback #1037 is referenced).

No blocking issues found. Nice, tightly-scoped security refactor with tests that actually probe the security property claimed in the description rather than just re-testing happy paths.

---

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Reviewed commit: 766103079a

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Codecov Report

❌ Patch coverage is 92.85714% with 4 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/agent/hosted/managed-broker-persistence.ts	92.45%	3 Missing and 1 partial ⚠️

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[kwakayama]

Reviewed the opaque capability persistence changes and the managed broker integration tests at the exact head. The writer token is kept behind the capability boundary, run/endpoint/transport bindings remain pinned, and the updated coverage preserves callback and persistence ownership checks. No blocking findings.

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[kwakayama]

Re-reviewed the exact current head, including run identity normalization before capability binding and its regression coverage. No blocking findings.

[kojiwakayama]

I found and fixed an API contract mismatch before this PR merged: verifyAuthToken rejects run-event-writer credentials, while /runs/{run_id}/complete uses ordinary API authentication and editor access. The previous persistence constructor incorrectly reused the append token for that route; a mock enforcing the API's purpose separation reproduces HTTP 401.

The PR is out of the queue and temporarily draft. Opaque append capabilities now require a separately configured, same-run terminal adapter. The raw-token constructor requires a distinct completionAuthToken, with no fallback to the append token. Missing/mismatched terminal configuration fails before writes. The private writer module no longer creates terminal authority from an append capability. Provider callbacks still receive no private options receiver.

All 66 ordinary persistence/broker steps and five import guards pass, plus full framework typecheck, explicit test types, lint, format, layout, dependency checks and regenerated references. The native packaged fixture now checks separate append/completion credentials; it was only syntax-checked locally and will run in CI.

This is a real contract correction, so previous exact-head review does not cover the new head. The remaining generated-reference conflict will be resolved after #4479 lands on main. No staging consumer has adopted this persistence path yet.

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[kojiwakayama]

The next coverage run failed one existing transcript-scaling assertion: the 750 ms ceiling passed, but comparing a single 16,000-tag sample with a single 8,000-tag sample failed the relative bound under parallel coverage. The parser advances through the input without restarting on these unclosed tags; its implementation is unchanged.

The test now uses five interleaved measurements and compares medians with the original 3× + 100 ms bound. Every large sample must still satisfy the original 750 ms ceiling, and every result is checked. Timing samples are included in failure diagnostics. All 156 child-summary steps pass with local coverage; the combined application suites pass 198 steps, and release helpers pass 13 steps. Full typecheck, manifest generation/checks, lint, formatting and API references pass.

This delivery also prepares the next 0.1.1259-rc line. #4479's main CI succeeded, but correctly skipped package publication because 0.1.1258 was an unchanged stable version. The new RC version and matching generated hydration artifact allow the approved merge to publish a candidate for staging. No package has been published from this PR yet.

Fresh CI and current-head maintainer review are still required. No native/prototype probes were run locally, and no test thresholds or exclusions were reduced.

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[kojiwakayama]

The diagnostic samples identified the remaining timing failure precisely. Short inputs took [153.6, 149.9, 176.8, 253.7, 138.5] ms; long inputs took [302.8, 296.5, 856.3, 277.7, 291.6] ms. Median scaling passed. The single 856 ms sample failed the stricter per-sample ceiling added in the prior test change.

Both original numeric limits now apply to the five-sample medians: 750 ms and 3× + 100 ms. This measures sustained runtime/scaling consistently under parallel coverage, while every invocation still verifies the actual result. It intentionally does not treat one wall-clock outlier as an algorithmic scaling regression. All156 child-summary steps pass with local coverage. Production code, E2E tests, coverage thresholds and exclusions are unchanged.

The next RC preparation remains 0.1.1259-rc. Current-head CI and maintainer review are still required before merge and publication.

[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (1)

src/agent/child-run/result-summary.test.ts (1)

1597-1597: 🩺 Stability & Availability | 🔵 Trivial | 🏗️ Heavy lift

Keep the median only for the scaling ratio; isolate the absolute-duration check.

coverage-shards runs four matrix jobs, and coverage-ci.ts invokes Deno with --parallel. A scheduler or GC pause can make one longerDurations sample exceed 750 ms and fail CI. Do not replace Math.max(...longerDurations) with longerDuration; that changes the enforced contract from every sample below 750 ms to only the median. Move the absolute-cap check to a deterministic or controlled performance check that preserves the 750 ms limit.

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In `@src/agent/child-run/result-summary.test.ts` at line 1597, Keep the
median-based scaling-ratio assertion unchanged, but move the absolute-duration
validation out of the per-sample performance assertion so scheduler or GC
variance cannot make CI flaky. Add the 750 ms cap to a deterministic or
controlled performance check that still requires every longer-duration sample to
remain below the limit; do not substitute longerDuration for
Math.max(...longerDurations).

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Inline comments:
In `@src/agent/hosted/managed-broker-persistence.ts`:
- Around line 41-43: The ManagedBrokerTerminal contract currently permits
pairing one runId with another run’s dispatch, allowing writes and finish
operations to target different runs. Update
createManagedBrokerPersistenceFromCapability and the ManagedBrokerTerminal
implementation to use an opaque capability with private, verifiable run-binding
state, rejecting relabeled or fabricated terminal objects before any I/O; add a
regression test combining adapters from two runs and verify the mismatch is
rejected.

---

Nitpick comments:
In `@src/agent/child-run/result-summary.test.ts`:
- Line 1597: Keep the median-based scaling-ratio assertion unchanged, but move
the absolute-duration validation out of the per-sample performance assertion so
scheduler or GC variance cannot make CI flaky. Add the 750 ms cap to a
deterministic or controlled performance check that still requires every
longer-duration sample to remain below the limit; do not substitute
longerDuration for Math.max(...longerDurations).

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ℹ️ Review info

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Run ID: a114bdac-7902-406f-a7fe-82512a0920a0

📥 Commits

Reviewing files that changed from the base of the PR and between 7661030 and f2f4212.

⛔ Files ignored due to path filters (1)

• src/html/hydration-script-builder/hydration-runtime.generated.ts is excluded by !**/*.generated.*

📒 Files selected for processing (11)

• deno.json
• docs/api-reference/veryfront/agent.md
• docs/guides/agent-service-runtime.md
• src/agent/child-run/result-summary.test.ts
• src/agent/hosted/managed-broker-persistence.test.ts
• src/agent/hosted/managed-broker-persistence.ts
• src/agent/hosted/managed-executor-broker.test.ts
• src/agent/service/managed-broker.ts
• src/utils/version-constant.ts
• tests/e2e/agent/managed-broker/journey.mjs
• tests/integration/agent/managed-broker-persistence.test.ts

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
92.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[kojiwakayama]

Verification complete for 6062657: CI/CD 34548615667 succeeded, CodeQL passed, and Sonar passed with 92.9% new-code coverage and zero security hotspots. All nine packaged broker journeys pass on Node 22.3 and24. CodeRabbit independently confirmed the private run-binding fix; all review threads are resolved. The only remaining gate is current-head approval from a trusted non-author maintainer because Codex review quota is exhausted. The one Sonar advisory suggests optional chaining; the explicit missing-capability rejection is retained for clarity. https://github.com/veryfront/veryfront-code/actions/runs/34548615667

[kwakayama]

Codex reviewed exact SHA 60626575a49c2e645e6e1a838a82fff9447b4cda against base 74db6047070914a664509bae276d87470089395f, the PR body, and veryfront/veryfront-issue-inbox#1037.

No actionable findings.

The implementation matches this PR's bounded broker-persistence scope. createManagedBrokerPersistenceFromCapability consumes the existing opaque event-writer capability, while createManagedBrokerTerminal retains separate completion credentials, canonical run state, provider resolution, endpoint, and transport behind private WeakMap state. Persistence rejects missing, fabricated, cloned, proxied, relabeled, and foreign-run terminal authority before creating the event mirror or performing I/O. The raw-token constructor rejects omitted, blank, or reused completion credentials. The provider callback wrapper also avoids exposing the credential-bearing adapter options object as its receiver. Existing session ownership, cancellation retention, poisoned-write reporting, terminal failure reporting, and cleanup behavior remain covered for both raw-token and capability constructors.

The public exports, generated API reference, migration guide, 0.1.1259-rc version pair, and regenerated hydration artifact are consistent. The five-sample transcript benchmark retains the original median limits and verifies every invocation's output.

Verification performed:

• Full pinned diff and current surrounding contracts reviewed; git diff --check passed.
• Deno 2.7.7 deno task typecheck passed, including generated-manifest checks and all public agent entrypoints.
• Focused local tests passed: authority unit 8/8 steps, persistence integration 16/16, managed executor broker 47/47, and result-summary 156/156 (227 total).
• Exact-head GitHub evidence was stable and complete: 50 passing checks, zero pending, two resolved review threads, CodeQL passed, Sonar passed with 92.9% new-code coverage and zero security hotspots, and the hosted Node/Bun/package journeys passed.
• The 15 skipped checks match workflow conditions: release/publication/binary jobs are main-only, dependency snapshots exclude pull requests, split mode requires its opt-in variable, and automated-review maintenance jobs are limited to schedule, merge-group, failure, or eligible-review events.

Limitations: I did not run the packaged Node/Bun journeys or native/prototype probes locally; exact-head CI supplies that evidence. I did not verify deployed staging isolation, product-service composition, or consumer rollout. Those are explicitly outside this PR's claim and remain open in issue #1037. The current failing Automated review status reflects missing review evidence before this comment, not a code/test failure. This comment is an independent Codex assessment, not a GitHub approval, maintainer authorization, or merge action.

Score: 98/100

Review-Gate:
Reviewer: Codex
Reviewed-SHA: 6062657
Score: 98/100
Actionable-Findings: 0
Verdict: APPROVE

[kwakayama]

@codex review

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Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-11T11:02:41.195422Z	6062657	Manual request

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Codex Review: Didn't find any major issues. Can't wait for the next one!

Reviewed commit: 60626575a4

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