[senamakel]

Adds a bounded, deterministic DNS resolver for native security integration tests. The test-only native-security-tests feature reads per-host IP answer sequences from TINYSECURITY_TEST_DNS_SEQUENCE, consumes one answer per lookup, normalizes hostnames, and fails closed on missing, malformed, duplicate, or exhausted sequences. It is selected only in debug builds; release/default builds continue to use SystemResolver.

This lets the OpenHuman integration fixture prove that a public DNS preflight followed by a loopback answer at browser dial authorization is denied by the actual TinySecurity module and never reaches the listener.

Validation:

• cargo fmt --all -- --check
• cargo test -p tinysecurity-module --features native-security-tests --lib adapter::native_test_resolver::tests:: (7 passed)
• Focused cargo llvm-cov report: 94.44% line coverage for native_test_resolver.rs
• cargo clippy -p tinysecurity-module --all-targets --all-features -- -D warnings
• cargo build -p tinysecurity-module --features native-security-tests
• cargo build -p tinysecurity-module
• scripts/ci/security-browser-egress-fixture.sh from the OpenHuman worktree (callback, existing loopback denial, and DNS rebinding tests all passed)

A local full unit run without native-security-tests had 11 failures in crypto-authority and restricted audit-storage/callback tests. Hosted cross-platform checks for the current head are running.

Part of tinyhumansai/openhuman#7328.

Summary by CodeRabbit

• New Features
  • Native security test builds can use configured DNS address sequences for scoped network checks. Lookups consume addresses in order; invalid or exhausted sequences deny access.
• Documentation
  • Added guidance for configuring the native test DNS fixture, including its failure behavior.
• Tests
  • Updated native test timeouts to allow longer-running cases.

[tinysweeper]

Tiny Sweeper review

⏳ Reviewing 068bb3391506 now. The last completed report, when available, remains below until this pass finishes.

Previous completed report

Tiny Sweeper review

Reviewed head: c18b56f43bc647f1e75bd288b5827188abcd823f

Verdict: Ready for maintainer review · Priority: none
Coverage: Reviewed 7 of 7 files.
Pull request purpose (title): test: add controlled…

Diagnostics and supporting details

Full summary

Pull request purpose (title): test: add controlled DNS resolver for native egress tests. Tiny Sweeper completed its review; deterministic results follow.

Review snapshot

Change surface	Files	Review signal	Count
Production	2	Active findings	0
Tests	4	Noted findings	0
Documentation	0	Resolved findings	0
Configuration	1	Pending checks/questions	0

Completeness: Complete
Test assessment: Test coverage is assessed from changed tests and lane evidence; execution is not claimed without trusted check data.

What changed

Declares a `native-security-tests` feature in `crates/tinysecurity-module/Cargo.toml` and adds a cfg-gated module include in `crates/tinysecurity-module/src/adapter.rs` (feature plus debug_assertions), with an `egress_resolver()` helper returning the fixture resolver under that cfg and `&tinysecurity::SystemResolver` otherwise; the url guard, check-with-redactor, and browser dial authorization paths now call `egress_resolver()` instead of hardcoding `SystemResolver`. `crates/tinysecurity-module/src/native_test_resolver.rs` introduces a `FixtureResolver` parsed from JSON via a custom `Deserialize` visitor that rejects duplicate hostname keys and host-count overruns during deserialization, with byte/host/per-host/total bounds, hostname and IP validation, case-normalized host keys, one-answer-per-lookup sequencing, a `RejectResolver` fallback selected by `configured_resolver()`, and `valid_hostname` enforcement. Its tests in `crates/tinysecurity-module/src/native_test_resolver_tests.rs` cover sequencing, canonicalization, bounds, hostname shapes, resolver limit/timeout checks, and the configured-resolver selection path. `.env.example` documents the fixture variable. Two test-only timeout relaxations appear in `crates/tinysecurity-module/examples/secret_cipher_native_contract/fixture.rs` (client proxy timeout raised to 35 seconds) and `crates/tinysecurity-module/src/adapter_secret_tests.rs` (`callback_timeout_ms` raised to 1000); the description lane noted the author's body does not mention these, which is a description gap rather than a code defect. The latest-push-delta is unavailable: there is no trusted base-to-head diff comparison, so the whole-pull-request diff above is not presented as a push delta.

Features

• Added — Test-only `native-security-tests` feature and cfg-gated resolver selection: When the feature is enabled alongside `debug_assertions`, egress lookups in debug test builds use a deterministic fixture resolver; release and default builds keep `SystemResolver`, so production behavior is unchanged. (crates/tinysecurity-module/Cargo.toml publish = false, crates/tinysecurity-module/src/adapter.rs impl PolicyService {)
• Added — Bounded, fail-closed `FixtureResolver` with duplicate-rejecting parsing: Parses a bounded JSON host-to-address script through a custom visitor that errors on duplicate hostname keys and host-count overruns during deserialization; validates hostnames and IPs, lowercases host keys and rejects case-collapsed duplicates, consumes one answer per lookup, and denies on invalid input, unknown host, or exhausted sequence. (crates/tinysecurity-module/src/native_test_resolver.rs)
• Modified — `configured_resolver()` selection helper behind `resolver()`: Splits environment-variable reading from resolver construction so the fallback to `RejectResolver` on an absent or unparseable fixture is testable without touching the process environment; the selected resolver is cached in a `OnceLock`. (crates/tinysecurity-module/src/native_test_resolver.rs)
• Modified — Egress call sites route through `egress_resolver()`: URL guard, check-with-redactor, and browser dial authorization select the resolver dynamically, enabling the fixture to drive DNS sequencing in tests while preserving `SystemResolver` in production builds. (crates/tinysecurity-module/src/adapter.rs impl PolicyService {, crates/tinysecurity-module/src/adapter.rs struct PolicyService {)
• Added — Fixture environment documentation in `.env.example`: Documents the debug-only `TINYSECURITY_TEST_DNS_SEQUENCE` variable, that each host lookup consumes the next address, and that malformed or exhausted sequences deny. (.env.example)
• Modified — Test-only timeout relaxations in native contract fixture and secret adapter tests: The fixture proxy client timeout is raised to 35 seconds so the module's own callback deadline settles pending work and the duplicate-execution assertion observes the module's replay rejection rather than a client-side timeout; `callback_timeout_ms` is raised to 1000 to avoid spurious authority denies under llvm-cov on Windows. Both affect test harnesses only. (crates/tinysecurity-module/examples/secret_cipher_native_contract/fixture.rs pub(super) async fn run(, crates/tinysecurity-module/src/adapter_secret_tests.rs fn config() -> SecretConfig2 {)

Tests

• unit — Verifies that a fixture script for `rebind.test` returns configured addresses one per resolution in sequence and returns `ResolveFailure` once the sequence is exhausted.: Behavioural assertions on sequencing and exhaustion that would fail if advancing stopped. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)
• unit — Verifies that a fixture key declared in mixed case (`Rebind.Test`) is matched by a lowercase query.: Behavioural assertion on case folding. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)
• unit — Asserts `FixtureResolver::parse` errors on empty input, empty map, empty answer list, invalid hostnames, keys that collide after lowercasing, exact duplicate keys, non-IP values, oversized hostnames, answers-per-host overruns, and oversized fixtures.: Covers fail-closed parsing branches including duplicate-key rejection. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)
• unit — Builds fixture strings exceeding the host-count bound and exceeding the 8-answers-per-host limit across hosts and asserts parsing fails.: Directly targets the host-count and total-answer bounds. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)
• unit — Asserts rejection of leading/trailing-hyphen labels, empty labels, over-length labels, non-ASCII names, and non-object JSON (`[]`, `null`, null answer lists).: Covers hostname shape validation and JSON shape rejection. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)
• unit — Asserts `resolve` returns `ResolveFailure` for zero and oversized limits, zero and excessive timeouts, over-length hostnames, and hosts absent from the fixture.: Covers the resolve-time guards and unknown-host path. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)
• unit — Verifies `configured_resolver` returns a resolving fixture for valid input and a rejecting resolver for `None` and non-JSON input.: Covers the fixture-to-resolver selection path, but not the adapter call sites that consume `egress_resolver()`. (crates/tinysecurity-module/src/native_test_resolver_tests.rs)

Findings

No active actionable findings.

Before merge

None.

Agent review details

critique

• Conclusion: Success
• Scope reviewed: all assigned evidence
• Lane summary: Reviewed 2 files; 0 findings. _The code index is behind this pull request (indexed at `4fe3eeed5342`), so retrieved context may be out of date._

security

• Conclusion: Success
• Scope reviewed: all assigned evidence
• Positive: The security lane answered with no findings; the fixture is gated on the test-only feature plus `debug_assertions`, leaving production builds on `SystemResolver`.
• Lane summary: Reviewed 2 files; 0 findings. _The code index is behind this pull request (indexed at `4fe3eeed5342`), so retrieved context may be out of date._

tests

• Conclusion: Success
• Scope reviewed: all assigned evidence
• Positive: The tests lane answered with no findings, noting the resolver functionality is covered by the sibling unit tests exercising parsing bounds, hostname validation, per-host sequence exhaustion, and limit/timeout rejection.
• Positive: The tests lane reported the two fixture timeout changes alter test harness configuration only, with no production behaviour left uncovered.
• Lane summary: The behavioural changes since the last review are two test-fixture timeouts (a fixture proxy timeout and a fixture callback deadline), and neither alters production behaviour in a way that a missing test could catch — the timeout values are pinned in fixture configuration that existing assertions already drive. The resolver functionality is covered by the sibling unit tests in `native_test_resolver_tests.rs`, which are included in this change's full diff and exercise parsing bounds, hostname validation, per-host sequence exhaustion, and limit/timeout rejection. One edge in the resolver's `resolve` path — the `next_answer` map is keyed by the lowercased hostname while `answers` may hold the canonical key — is consistent with the parse-time lowercasing, so lookups align. I found no defect worth reporting. _The code index is behind this pull request (indexed at `4fe3eeed5342`), so retrieved context may be out of date._

commits

• Conclusion: Success
• Scope reviewed: all assigned evidence
• Positive: The commits lane answered with no sensitive content reported in committed files.
• Lane summary: No sensitive content in committed files. _The code index is behind this pull request (indexed at `4fe3eeed5342`), so retrieved context may be out of date._

description

• Conclusion: Success
• Scope reviewed: all assigned evidence
• Positive: The description lane answered that the resolver work in the body matches the title, with the only unreported change being the pair of test-only timeout relaxations, which it classified as a description gap rather than a code defect.
• Lane summary: The resolver work the body describes is present and matches the title; the only unreported change is the pair of test-only timeout relaxations in the secret contract fixture and the secret adapter tests, which the author's body never mentions. That is a description gap, not a code defect — the quoted `35`-second client timeout and the `1000` ms callback deadline are both within the module's accepted ranges (`1..=30000`) and only affect test harnesses, so nothing in the diff misbehaves. _The code index is behind this pull request (indexed at `4fe3eeed5342`), so retrieved context may be out of date._

Evidence and run details

• Models: ladder/vectors-oai3, deepseek-v4.1-flash
• Spend: $0.000786
• Tokens: 302370 input · 13584 output · 105984 cached · 478 embedding
• Updated: 2026-10-23T02:26:37Z
• Continuity: summary cache chain restarted at the storage ceiling.

Head	State	Pass summary
04f9c097606d	ready for maintainer review	0 active finding(s), 0 resolved finding(s) (at 2026-10-23T01:02:44Z)
5ed1d4267bed	ready for maintainer review	0 active finding(s), 0 resolved finding(s) (at 2026-10-23T01:06:44Z)
467ed1e8804e	ready for maintainer review	0 active finding(s), 0 resolved finding(s) (at 2026-10-23T01:12:51Z)
ed63e62d60b5	ready for maintainer review	0 active finding(s), 0 resolved finding(s) (at 2026-10-23T01:52:16Z)
c18b56f43bc6	ready for maintainer review	0 active finding(s), 0 resolved finding(s) (at 2026-10-23T02:26:37Z)

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Reviewing files that changed from the base of the PR and between d8707a0 and 068bb33.

📒 Files selected for processing: 30

• MODULE.md
• README.md
• crates/tinysecurity-approval/src/binding.rs
• crates/tinysecurity-approval/src/engine.rs
• crates/tinysecurity-approval/src/engine_scopes_tests.rs
• crates/tinysecurity-bus/src/device_frame_tests.rs
• crates/tinysecurity-bus/src/device_pairing_tests.rs
• crates/tinysecurity-bus/src/lib.rs
• crates/tinysecurity-bus/src/names.rs
• crates/tinysecurity-bus/src/policy.rs
• crates/tinysecurity-bus/src/policy_tests.rs
• crates/tinysecurity-bus/src/secret.rs
• crates/tinysecurity-bus/src/secret_tests.rs
• crates/tinysecurity-bus/tests/scoped_wire.rs
• crates/tinysecurity-bus/tests/wire.rs
• crates/tinysecurity-crypto/src/native_handles.rs
• crates/tinysecurity-crypto/src/native_handles_tests.rs
• crates/tinysecurity-module/examples/secret_cipher_native_contract/fixture.rs
• crates/tinysecurity-module/src/adapter.rs
• crates/tinysecurity-module/src/adapter_host_tool_tests.rs
• crates/tinysecurity-module/src/adapter_secret.rs
• crates/tinysecurity-module/src/adapter_secret_cipher.rs
• crates/tinysecurity-module/src/adapter_secret_cipher_fixture_tests.rs
• crates/tinysecurity-module/src/adapter_secret_tests.rs
• crates/tinysecurity-policy/src/engine.rs
• crates/tinysecurity-policy/src/engine_tests.rs
• crates/tinysecurity-policy/src/scoped.rs
• docs/README.md
• docs/specs/runtime-secret-scopes-contract-1.29.md
• docs/specs/skill-scan-contract-1.29.md

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📒 Files selected for processing: 5

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• crates/tinysecurity-module/src/adapter_secret_tests.rs
• crates/tinysecurity-module/src/native_test_resolver.rs
• crates/tinysecurity-module/src/native_test_resolver_tests.rs

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📝 Walkthrough

The change adds a feature-gated native DNS fixture resolver with bounded input and ordered answers. In debug builds with the feature enabled, three adapter security checks use it. Other builds continue to use SystemResolver. Native test timeout values also change.

Changes: Native security test DNS

Layer / File(s)	Summary
Add the bounded fixture resolver crates/tinysecurity-module/Cargo.toml, crates/tinysecurity-module/src/native_test_resolver.rs, crates/tinysecurity-module/src/native_test_resolver_tests.rs, .env.example	The native-security-tests feature and gated resolver are added. The resolver validates fixture data and lookup parameters, returns configured addresses in order, and rejects invalid or exhausted lookups. Tests cover resolver behavior. The example environment file documents the fixture variable.
Route adapter checks through the selected resolver crates/tinysecurity-module/src/adapter.rs	scoped_url_guard, scoped_egress_check, and authorize_browser_dial use the selected resolver. The adapter uses the fixture resolver when both gates are enabled and SystemResolver otherwise.
Adjust native test timeouts crates/tinysecurity-module/examples/secret_cipher_native_contract/fixture.rs, crates/tinysecurity-module/src/adapter_secret_tests.rs	The native fixture proxy uses a 5-second timeout for mode 12, a 30-second timeout for mode 18, and a 10-second timeout otherwise. The adapter secret test config uses a 1000 ms callback timeout instead of 50 ms.

Priority: ⚪ Pending latest changes

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Other

Sequence Diagram(s)

sequenceDiagram
  participant Adapter
  participant NativeTestResolver
  participant Environment
  Adapter->>NativeTestResolver: Request resolver for gated security checks
  NativeTestResolver->>Environment: Read TINYSECURITY_TEST_DNS_SEQUENCE once
  NativeTestResolver-->>Adapter: Return fixture resolver or rejecting resolver
  Adapter->>NativeTestResolver: Resolve hostname
  NativeTestResolver-->>Adapter: Return next configured address or failure

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Merge Risk: ⚪ Minimal · up to d8707

No actionable issue remains in the reviewed change. The external fixture’s reported result was not independently confirmed, but the inspected paths support the intended DNS-rebinding denial.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 40.74% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 27 functions across 5 files. (1 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: adding a controlled DNS resolver for native egress tests.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 40.74% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 27 functions across 5 files. (1 skipped: 1 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

✨ Finishing Touches: 💡 1

📝 Generate docstrings: 💡

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_{A rabbit checks the DNS trail at night.
Each host gets its answers in order.
A bad fixture brings no address.
Three checks follow the selected resolver.
The proxy waits by mode.
The callback clock gets more time.}

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Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-23T08:54:03.089532Z	068bb33	New commits

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Actionable comments posted: 1

---

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Inline comments:
Review comments at @crates/tinysecurity-module/src/native_test_resolver.rs:
- Line 51: Normalize fixture hostname keys to lowercase before inserting them
into answers in the fixture-loading logic, and return ResolveFailure if
insertion replaces an existing key after normalization. Preserve the current
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