chore(antithesis): split intake HTTP modules

[blt]

Summary

This commit is prep work for up-stack differential equivalence work. I will be adding
more HTTP routes for the scenario rig to hook into, distinct from the routes that are
used by ADP in its normal operation. I found as I was working on that code a desire
for tidy organization, the root of which is present here.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

How did you test this PR?

References

[blt]

• chore(antithesis): Differential comparison between ADP and Datadog Agent context egress #1891
• enhancement(antithesis): accept Datadog intake endpoints #1893
• chore(antithesis): split intake HTTP modules #1892 👈 (View in Graphite)
• enhancement(antithesis): Move antithesis/deploy to scenarios/general #1890
• enhancement(antithesis): Introduce rig intake API #1826
• enhancement(antithesis): floor buffer size, multi-value packed metrics #1799 : 1 other dependent PR (#1800 )
• chore(antithesis): untrack scratchbook and add to .gitignore #1905
• enhancement(antithesis): Expand SDK assertions, hammer sketch #1785
• enhancement(antithesis): DogStatsD load generation #1782
• enhancement(antithesis): Vary datadog.yaml in test/antithesis, assert aliveness #1779
• docs(antithesis): Antithesis research scratchbook and bug ledger #1768 : 2 other dependent PRs (#1769 , #1787 )
• chore(antithesis): Antithesis test harness and workload #1767
• enhancement(correctness): Create test/antithesis sub-project  #1774
• main

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[pr-commenter]

Binary Size Analysis (Agent Data Plane)

Baseline: 2b0cad1 · Comparison: 49d9bc6 · diff
Analysis Configuration: stripped binaries · Pass/Fail Threshold: +5%
Sizes: 40.55 MiB (baseline) vs 40.55 MiB (comparison)
Size Change: -8 B (-0.00%)

✅ Binary size difference within threshold

Changes by Module

Module	File Size	Symbols
anon.c332a4a573d0a9a1bf7c71b0a1f57672.1.llvm.11140276550370941693	-130 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.1.llvm.4714197043857028029	+129 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.4.llvm.11140276550370941693	-115 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.4.llvm.4714197043857028029	+114 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.3.llvm.11140276550370941693	-109 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.3.llvm.4714197043857028029	+108 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.0.llvm.11140276550370941693	-97 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.0.llvm.4714197043857028029	+96 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.2.llvm.11140276550370941693	-95 B	1
anon.c332a4a573d0a9a1bf7c71b0a1f57672.2.llvm.4714197043857028029	+94 B	1
[Unmapped]	-3 B	1

Detailed Symbol Changes

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  [NEW]    +129  [NEW]     +40    anon.c332a4a573d0a9a1bf7c71b0a1f57672.1.llvm.4714197043857028029
  [NEW]    +114  [NEW]     +25    anon.c332a4a573d0a9a1bf7c71b0a1f57672.4.llvm.4714197043857028029
  [NEW]    +108  [NEW]     +19    anon.c332a4a573d0a9a1bf7c71b0a1f57672.3.llvm.4714197043857028029
  [NEW]     +96  [NEW]      +7    anon.c332a4a573d0a9a1bf7c71b0a1f57672.0.llvm.4714197043857028029
  [NEW]     +94  [NEW]      +5    anon.c332a4a573d0a9a1bf7c71b0a1f57672.2.llvm.4714197043857028029
  -0.1%      -3  [ = ]       0    [Unmapped]
  [DEL]     -95  [DEL]      -5    anon.c332a4a573d0a9a1bf7c71b0a1f57672.2.llvm.11140276550370941693
  [DEL]     -97  [DEL]      -7    anon.c332a4a573d0a9a1bf7c71b0a1f57672.0.llvm.11140276550370941693
  [DEL]    -109  [DEL]     -19    anon.c332a4a573d0a9a1bf7c71b0a1f57672.3.llvm.11140276550370941693
  [DEL]    -115  [DEL]     -25    anon.c332a4a573d0a9a1bf7c71b0a1f57672.4.llvm.11140276550370941693
  [DEL]    -130  [DEL]     -40    anon.c332a4a573d0a9a1bf7c71b0a1f57672.1.llvm.11140276550370941693
  -0.0%      -8  [ = ]       0    TOTAL

[pr-commenter]

Regression Detector (Agent Data Plane)

Run ID: 2f53f331-4fba-4562-b8a6-699cb1733753
Baseline: 9c1abdeb · Comparison: f1148f73 · diff

Optimization Goals: ✅ No significant changes detected

Fine details of change detection per experiment (35)

Experiments configured erratic: true are tagged (ignored) and skipped when determining which experiments regressed or improved. Experiments which are detected as erratic at runtime are tagged (erratic) to flag that the run's sample dispersion was high, but their regression / improvement signal still counts.

experiment	goal	Δ mean %	links
dsd_uds_100mb_3k_contexts_cpu (erratic)	cpu	⚪ +2.07	metrics profiles logs
otlp_ingest_metrics_5mb_memory	memory	⚪ +1.06	metrics profiles logs
otlp_ingest_traces_5mb_cpu (erratic)	cpu	⚪ +0.77	metrics profiles logs
dsd_uds_1mb_3k_contexts_memory	memory	⚪ +0.69	metrics profiles logs
dsd_uds_1mb_3k_contexts_cpu (erratic)	cpu	⚪ +0.23	metrics profiles logs
dsd_uds_100mb_3k_contexts_memory	memory	⚪ +0.21	metrics profiles logs
otlp_ingest_traces_5mb_throughput	throughput	⚪ -0.13	metrics profiles logs
quality_gates_rss_dsd_ultraheavy	memory	⚪ +0.11	metrics profiles logs
dsd_uds_500mb_3k_contexts_throughput	throughput	⚪ -0.05	metrics profiles logs
quality_gates_rss_idle	memory	⚪ +0.04	metrics profiles logs
otlp_ingest_traces_ottl_filtering_5mb_throughput	throughput	⚪ -0.04	metrics profiles logs
dsd_uds_10mb_3k_contexts_cpu (erratic)	cpu	⚪ +0.03	metrics profiles logs
dsd_uds_512kb_3k_contexts_cpu (erratic)	cpu	⚪ +0.03	metrics profiles logs
dsd_uds_512kb_3k_contexts_throughput	throughput	⚪ -0.00	metrics profiles logs
otlp_ingest_metrics_5mb_throughput	throughput	⚪ -0.00	metrics profiles logs
dsd_uds_100mb_3k_contexts_throughput	throughput	⚪ +0.00	metrics profiles logs
dsd_uds_1mb_3k_contexts_throughput	throughput	⚪ +0.00	metrics profiles logs
dsd_uds_10mb_3k_contexts_throughput	throughput	⚪ +0.01	metrics profiles logs
otlp_ingest_logs_5mb_throughput (ignored)	throughput	⚪ +0.03	metrics profiles logs
otlp_ingest_traces_ottl_transform_5mb_memory	memory	⚪ -0.08	metrics profiles logs
otlp_ingest_traces_ottl_transform_5mb_throughput	throughput	⚪ +0.12	metrics profiles logs
otlp_ingest_traces_5mb_memory	memory	⚪ -0.14	metrics profiles logs
dsd_uds_500mb_3k_contexts_memory	memory	⚪ -0.15	metrics profiles logs
otlp_ingest_traces_ottl_filtering_5mb_memory	memory	⚪ -0.17	metrics profiles logs
quality_gates_rss_dsd_low	memory	⚪ -0.18	metrics profiles logs
quality_gates_rss_dsd_heavy	memory	⚪ -0.37	metrics profiles logs
otlp_ingest_traces_ottl_filtering_5mb_cpu (erratic)	cpu	⚪ -0.38	metrics profiles logs
otlp_ingest_logs_5mb_cpu (ignored)	cpu	⚪ -0.39	metrics profiles logs
dsd_uds_500mb_3k_contexts_cpu (erratic)	cpu	⚪ -0.42	metrics profiles logs
otlp_ingest_traces_ottl_transform_5mb_cpu (erratic)	cpu	⚪ -0.57	metrics profiles logs
quality_gates_rss_dsd_medium	memory	⚪ -0.66	metrics profiles logs
dsd_uds_512kb_3k_contexts_memory	memory	⚪ -0.74	metrics profiles logs
dsd_uds_10mb_3k_contexts_memory	memory	⚪ -0.93	metrics profiles logs
otlp_ingest_metrics_5mb_cpu (erratic)	cpu	⚪ -1.70	metrics profiles logs
otlp_ingest_logs_5mb_memory (ignored)	memory	⚪ -16.96	metrics profiles logs

Bounds Checks: ✅ Passed (5)

experiment	check	replicates	observed	links
quality_gates_rss_dsd_heavy	memory_usage	10/10	✅ 133 MiB ≤ 140 MiB	metrics profiles logs
quality_gates_rss_dsd_low	memory_usage	10/10	✅ 42.4 MiB ≤ 50 MiB	metrics profiles logs
quality_gates_rss_dsd_medium	memory_usage	10/10	✅ 65.1 MiB ≤ 75 MiB	metrics profiles logs
quality_gates_rss_dsd_ultraheavy	memory_usage	10/10	✅ 191 MiB ≤ 200 MiB	metrics profiles logs
quality_gates_rss_idle	memory_usage	10/10	✅ 28.2 MiB ≤ 40 MiB	metrics profiles logs

Explanation

A change is flagged as a regression when |Δ mean %| > 5.00% in the regressing direction for its optimization goal AND SMP marks the experiment as a regression (is_regression: true). Improvements use the matching criteria for the improving direction. Experiments configured erratic: true (tagged (ignored)) are skipped outright; experiments detected as erratic at runtime (tagged (erratic)) still count, since that flag describes sample dispersion rather than directional certainty. The Δ mean % cell is colored accordingly: 🟢 = improvement, 🔴 = regression, ⚪ = neutral. Reduction in CPU or memory is an improvement; reduction in ingress throughput is a regression.

[Copilot]

Pull request overview

Refactors the Antithesis intake HTTP surface to split Datadog-compatible routes and request-measurement middleware into dedicated submodules, as prep work for adding additional scenario/rig-specific HTTP routes.

Changes:

• Extracted request measurement logic into http/middleware.rs and updated imports accordingly.
• Introduced http/datadog.rs (and http/datadog/metrics.rs) to house Datadog-compatible routes/handlers.
• Simplified http.rs to focus on composing the top-level router.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/antithesis/intake/src/lib.rs	Removes the old intake module entry point as handlers move under http/.
test/antithesis/intake/src/http.rs	Router composition now delegates to protocol submodules and middleware.
test/antithesis/intake/src/http/middleware.rs	New module containing measurement middleware and request extensions.
test/antithesis/intake/src/http/datadog.rs	New module defining Datadog-compatible intake routes.
test/antithesis/intake/src/http/datadog/metrics.rs	Houses the /api/v2/series handler and validation pipeline.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

[blt]

Merge activity

• Jun 25, 5:52 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Jun 25, 5:54 PM UTC: Graphite rebased this pull request as part of a merge.
• Jun 25, 6:06 PM UTC: @blt merged this pull request with Graphite.