[dustinbyrne]

Changes

Stacked on the Python benchmark producer PR #1134.

• Invoke the shared harness action in offline render mode inside the existing read-only benchmark job. Upload rendered comparisons separately from the three-file raw artifact.
• Add a separate default-branch workflow_run consumer using the shared trusted publishing workflow. No SDK/PR code executes in the writable job.
• Pin the harness action and shared workflow to real published immutable commits and document activation/measurement semantics.

Dependencies:

• feat: add shared SDK benchmark reporting posthog-sdk-test-harness#93 (a558711336bd3b81be4a820ed10f26372fc568ed)
• ci: add trusted SDK benchmark report workflow .github#84 (ced4b9694b90c9221bc277b1c8d9f013eafe56c5)

Both shared components and this caller configuration need normal review. Automatic PR comments activate only after the workflow_run caller lands on the default branch; summaries can render on this PR already.

Validation

• Actionlint, immutable-pin/path verification through GitHub, and diff checks passed.
• Real Node/Python result pairs rendered using the shared action code.
• Shared harness: 185 focused tests; full suite 1,501 passed / 502 skipped. Shared workflow: five boundary/pin checks and 40 existing tests passed.
• Fresh integrated read-only review covered this wiring and the shared implementation.

CI/tooling only; no SDK runtime, workload, or release changes in this layer. Performance differences remain informational.

Agent context

Autonomy: Human-driven (agent-assisted).
Implemented with Pi and reviewed independently. The stack keeps producer measurements separate from shared reporting integration.

[stamphog]

Not approved — this change needs a human reviewer.

Re-adding the stamphog label gives the same result unless the changed files change.

stamphog can't auto-review this pull request because two policy gates refused it. The deny-list gate flagged it as infra/CI/CD, since it adds .github/workflows/benchmark-report.yml and changes .github/workflows/benchmarks.yml. The tier gate classified it as T2-never (47 lines, 3 files, two areas, CI), a category that is never handled automatically. The size gate passed, so splitting the change wouldn't clear the refusal. Workflow changes need a human reviewer, so please ask a maintainer or the owners of the CI configuration to review it.

Gate mechanics and policy version

Gate		Result
prerequisites	✓	all clear
deny-list	✗	matches: infra_cicd
size	✓	41L, 2F substantive, 47L/3F incl. docs/generated/snapshots — within ceiling
tier	✗	classified as T2-never: T2-never (47L, 3F, two-areas, ci)
stamphog 2.6.1		.stamphog/policy.yml @ unknown · reviewed head 9d5ad57

[posthog]

PostHog Review · Standard · reviewed 9d5ad57: 1 Should fix.

See this review and its findings in PostHog Review. Comment @posthog review --deep for a Deep review. A Deep review takes longer and looks deeper than a Standard review.

[posthog]

P2 · Isolate publisher concurrency across pull requests

When three PR benchmark runs finish while a publisher remains active, the pinned workflow puts all reports in the same repository-wide concurrency group. GitHub replaces the pending job even with cancel-in-progress: false, so an unrelated PR loses its comment without a retry. Update the shared workflow pin after scoping concurrency per PR with a fork-safe fallback.

[github-actions]

posthog-python Compliance Report

Date: 2026-10-29T17:00:03.011581+00:00
Duration: 260157ms

✅ All Tests Passed!

121/121 tests passed

---

Capture_V1 Tests

✅ 95/95 tests passed

View Details

Test	Status	Duration
Endpoint And Method.Targets V1 Endpoint	✅	523ms
Endpoint And Method.Does Not Use Legacy Endpoints	✅	512ms
Required Headers.Has Authorization Bearer Header	✅	512ms
Required Headers.Has Content Type Json	✅	511ms
Required Headers.Has Posthog Sdk Info Format	✅	510ms
Required Headers.Has Posthog Attempt Header	✅	513ms
Required Headers.Has Posthog Request Id	✅	511ms
Required Headers.Has Posthog Request Timestamp	✅	512ms
Required Headers.Has User Agent	✅	510ms
Body Format.Body Has Created At And Batch	✅	511ms
Body Format.No Api Key In Body	✅	512ms
Body Format.No Sent At In Body	✅	512ms
Event Format.Event Has Required Root Fields	✅	513ms
Event Format.Event Uuid Is Valid	✅	510ms
Event Format.Event Timestamp Is Rfc3339	✅	511ms
Event Format.Non Utc Event Timestamp Is Converted To Utc	✅	526ms
Event Format.Distinct Id Is String	✅	511ms
Event Format.Distinct Id At Root Not Properties	✅	511ms
Event Format.Custom Properties Preserved	✅	513ms
Event Format.Set Properties Preserved	✅	511ms
Event Format.Set Once Properties Preserved	✅	511ms
Event Format.Groups Properties Preserved	✅	510ms
Event Format.Sdk Generates Uuid If Not Provided	✅	510ms
Event Format.Event Has Required Root Fields Batch	✅	515ms
Event Format.Event Uuid Is Valid Batch	✅	515ms
Event Format.Event Timestamp Is Rfc3339 Batch	✅	514ms
Event Format.Distinct Id Is String Batch	✅	515ms
Event Format.Distinct Id At Root Not Properties Batch	✅	514ms
Event Format.Custom Properties Preserved Batch	✅	514ms
Event Format.Set Properties Preserved Batch	✅	515ms
Event Format.Set Once Properties Preserved Batch	✅	517ms
Event Format.Groups Properties Preserved Batch	✅	514ms
Event Format.Sdk Generates Uuid If Not Provided Batch	✅	515ms
Batch Behavior.Multiple Events In Single Batch	✅	520ms
Batch Behavior.Batch Envelope Smoke	✅	516ms
Batch Behavior.Flush With No Events Sends Nothing	✅	507ms
Batch Behavior.Flush At Triggers Batch	✅	1012ms
Batch Behavior.Created At Reflects Batch Creation Time	✅	511ms
Deduplication.Generates Unique Uuids	✅	522ms
Deduplication.Different Events Same Content Different Uuids	✅	513ms
Deduplication.Preserves Uuid On Retry	✅	6522ms
Deduplication.Preserves Timestamp On Retry	✅	6520ms
Deduplication.Preserves Uuid And Timestamp On Batch Retry	✅	6523ms
Deduplication.No Duplicate Events In Batch	✅	518ms
Header Behavior On Retry.Attempt Header Starts At One	✅	513ms
Header Behavior On Retry.Attempt Header Increments On Retry	✅	13523ms
Header Behavior On Retry.Request Id Preserved On Retry	✅	6522ms
Header Behavior On Retry.Different Requests Have Different Request Ids	✅	3022ms
Header Behavior On Retry.Request Timestamp Changes On Retry	✅	6521ms
Response Format Validation.Success Response Has Uuid Keyed Results	✅	511ms
Response Format Validation.Success Response Has Ok For Each Event	✅	516ms
Response Format Validation.Success No Retry After When All Ok	✅	513ms
Response Format Validation.Success Retry After Present When Retry Events	✅	1522ms
Response Format Validation.Success No Retry After When Drop Only	✅	515ms
Response Format Validation.Response Echoes Request Id	✅	511ms
Retry Behavior.Retries On 408	✅	6518ms
Retry Behavior.Retries On 500	✅	6520ms
Retry Behavior.Retries On 503	✅	8523ms
Retry Behavior.Retries On 504	✅	6521ms
Retry Behavior.Retryable Errors Have Retry After	✅	3517ms
Retry Behavior.Respects Retry After On Retryable Error	✅	11525ms
Retry Behavior.Does Not Retry On 400	✅	2514ms
Retry Behavior.Does Not Retry On 401	✅	2515ms
Retry Behavior.Does Not Retry On 402	✅	2516ms
Retry Behavior.Does Not Retry On 413	✅	2514ms
Retry Behavior.Does Not Retry On 415	✅	2513ms
Retry Behavior.Non Retryable Errors Have No Retry After	✅	2515ms
Retry Behavior.Implements Backoff	✅	22539ms
Retry Behavior.Max Retries Respected	✅	22532ms
Partial Batch Handling.Handles 200 Full Success	✅	2516ms
Partial Batch Handling.Handles 200 With All Ok	✅	3517ms
Partial Batch Handling.Does Not Retry Dropped Events	✅	3517ms
Partial Batch Handling.Does Not Retry Limited Events	✅	3517ms
Partial Batch Handling.Prunes Ok Events On Partial Retry	✅	6528ms
Partial Batch Handling.Prunes Dropped Events On Partial Retry	✅	6528ms
Partial Batch Handling.Retries Only Retry Events From Partial	✅	6525ms
Partial Batch Handling.Partial Retry Preserves Uuids	✅	6521ms
Partial Batch Handling.Partial Retry Attempt Header Increments	✅	6523ms
Partial Batch Handling.Partial Retry Request Id Preserved	✅	6522ms
Partial Batch Handling.Respects Retry After On Partial	✅	8523ms
Partial Batch Handling.Unknown Result Treated As Terminal	✅	3519ms
Partial Batch Handling.Mixed Ok Drop Limited No Retry	✅	3521ms
Compression.Sends Gzip Content Encoding	✅	511ms
Compression.No Content Encoding When Disabled	✅	511ms
Compression.Compressed Body Is Decompressible	✅	511ms
Error Handling.Does Not Retry On Unknown 4Xx	✅	2513ms
Event Options.Cookieless Mode Override	✅	511ms
Event Options.Disable Skew Correction Override	✅	512ms
Event Options.Process Person Profile Override	✅	511ms
Event Options.Product Tour Id Override	✅	510ms
Event Options.Unset Options Omitted	✅	511ms
Event Options.Options Override In Batch	✅	515ms
Geoip And Historical Migration.Geoip Disable Injected Into Properties	✅	517ms
Geoip And Historical Migration.Historical Migration Set In Body	✅	513ms
Geoip And Historical Migration.Historical Migration Absent By Default	✅	510ms

Capture_Ai Tests

✅ 5/5 tests passed

View Details

Test	Status	Duration
Routing.Capture Ai Posts To Ai Endpoint	✅	514ms
Routing.Capture Does Not Reroute Ai Named Events	✅	511ms
Identity.Capture Ai Event Has Uuid	✅	514ms
Identity.Capture Ai Keeps Supplied Uuid	✅	510ms
Timestamp Format.Non Utc Event Timestamp Is Converted To Utc	✅	511ms

Feature_Flags Tests

✅ 17/17 tests passed

View Details

Test	Status	Duration
Request Payload.Request With Person Properties Device Id	✅	13ms
Request Payload.Flags Request Uses V2 Query Param	✅	10ms
Request Payload.Flags Request Hits Flags Path Not Decide	✅	12ms
Request Payload.Flags Request Omits Authorization Header	✅	13ms
Request Payload.Token In Flags Body Matches Init	✅	10ms
Request Payload.Groups Round Trip	✅	10ms
Request Payload.Groups Default To Empty Object	✅	10ms
Request Payload.Disable Geoip False Propagates As Geoip Disable False	✅	10ms
Request Payload.Disable Geoip Omitted Defaults To False	✅	10ms
Request Payload.Flag Keys To Evaluate Contains Only Requested Key	✅	10ms
Request Lifecycle.No Flags Request On Init Alone	✅	4ms
Request Lifecycle.No Flags Request On Normal Capture	✅	510ms
Request Lifecycle.Two Flag Calls Produce Two Remote Requests	✅	16ms
Request Lifecycle.Mock Response Value Is Returned To Caller	✅	11ms
Retry Behavior.Retries Flags On 502	✅	315ms
Retry Behavior.Retries Flags On 504	✅	314ms
Side Effect Events.Get Feature Flag Captures Feature Flag Called Event	✅	523ms

Feature_Flags_Local_Evaluation Tests

✅ 4/4 tests passed

View Details

Test	Status	Duration
Versioned Boolean Matching.Matching Version Missing	✅	98ms
Versioned Boolean Matching.Matching Version 1	✅	80ms
Versioned Boolean Matching.Matching Version 2	✅	82ms
Versioned Boolean Matching.Version Only Reload 1 2 1 2 Missing	✅	46ms

[posthog]

PostHog Review · Standard · reviewed adcfb06: 1 Should fix.

[posthog]

P2 · Preserve failure reporting for incomplete shards

When two workers time out early, run.py exits with only visited workloads saved. The new collect mode requires exact manifest coverage, so it rejects those partial results without writing bundle.json. The publisher then skips the failed run, leaving any older PR report unchanged. Emit complete failure records or support a failure-only report.

[marandaneto]

The code looks good; no qualifying findings. Verdict: correct.