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pixelgym/platform/s8_rehearsal.py: the S8 rehearsal driver. prepare verifies the sealed S7 qualification and an owner-supplied approval document, creates an isolated state directory outside Git, and takes a verified SQLite backup of the sealed qualification ledger. run executes the seven ordered lifecycle steps from the S7 proposal once (register and refuse unapproved B; A one-NOOP; B deploy with an interruption after canonical_response_persisted, a changed-context probe, app recreation through restore_active(), and identical resubmission; the 20-action golden episode with idempotent close; B redeploy, stale-episode refusal, and the exact 24-send cap_reached seal plus 429 deployment_attempt_cap_reached; rollback to A, a refused rollback and a refused redeploy toward exhausted B with appended failure events; cleanup in finally). inspect_rehearsal is the stored-evidence verifier (hashes, SQLite integrity, caller-action replay with raw pixel differences, recovery/cap/rollback inspection). stored_report/render_report read stored results only.
scripts/s8_rehearsal.py: prepare, run, verify, report. No activation, approval, deployment, publication, archive, or LFS command. run records the verify subprocess as an acceptance check with raw command, exit status, elapsed time, stdout, and stderr. Prepare/verify/report run under the strict no-socket guard; run denies internet-family sockets.
Tests: tests/unit/platform/test_s8_rehearsal.py (36 tests over a synthetic qualification and an unenforced local worker, self-declared as such in the evidence) and the opt-in tests/integration/test_s8_rehearsal_local.py (real Darwin sandbox, real 127.0.0.1 listener).
Docs: docs/s8-rehearsal.md (commands, refusals, lifecycle, evidence layout, limits); docs/platform-design.md status now says the S8 driver is implemented and the rehearsal is not executed; a short status section in docs/s7-serving-demo-proposal.md; a scripts/README.md row.
Why
S8 was specified in the S7 proposal but had no driver. This lands the owner-controlled rehearsal tooling without executing it.
Binding constraint
Nothing the qualified packages bind to changes: worker, scripted policy, gate policy and POLICY_SHA256, runtime lock generation, action fixtures, generate_task/golden_actions, and the frozen S2 schemas are untouched. The driver reuses the S7 preparer, budgeted transport, control store, coordinator, kind-aware runtime, and /api/v2 router unchanged; the step-3 interruption uses the host's existing interrupt_after hook. The private successor qualification binds revision 3b28658, where this driver does not exist; executing S8 against it needs a separate owner decision (fresh qualification at a revision containing the driver, or a run from a separate checkout). Nothing here records approval, runs the rehearsal, captures archives, or transfers to LFS.
Every fake send, including the six contract smokes, is reserved durably in the backed-up campaign ledger before transport invocation. Expected sends: qualification 77, A 2, B 24, smoke 6 (109 of the 111 cap). The refused rollback toward exhausted B is stopped by the lineage rule before the preparer runs and consumes no smoke; the refused redeploy demonstrates the exhaustion check and consumes the sixth.
Tests run
ruff check .: all checks passed. ruff format --check .: 491 files already formatted. python -m mypy pixelgym: no issues in 159 files.
python -m pytest -q -n 4 --dist worksteal tests/unit on the final commit: 3364 passed, 6 skipped, 191.86 s. (An earlier run on the first commit had 2 failures in test_grounding_evaluation_flow.py::test_flow_resumes_at_each_side_effect_boundary_without_duplicate_calls, a byte comparison of Metaflow resume outputs unrelated to this change; the same tests pass in isolation, 10 passed in 31.27 s.)
PIXELGYM_RUN_V5_SANDBOX_TESTS=1 python -m pytest -q tests/integration/test_s8_rehearsal_local.py on the final commit: 1 passed, 42.44 s. This qualifies a throwaway run from the clean checkout with the real Darwin sandbox and executes the rehearsal through a real loopback listener; all five worker proofs record darwin_sandbox_exec.
Not done
The rehearsal itself, archive capture, LFS transfer, and any approval record. S8 remains a human-owned gate; no milestone verdict is implied.
Summary by CodeRabbit
New Features
Added a bounded serving-rehearsal workflow to prepare, run, verify, and report on a rehearsal using an owner-approved qualification.
Approval must match the exact qualification and packages. The workflow uses simulated sends, records verification results, and does not publish or activate anything.
The rehearsal has not been executed and remains a human-owned gate.
Documentation
Added guidance on rehearsal steps, evidence, safety boundaries, approval requirements, and command usage.
No actionable comments were generated in the recent review.
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pixelgym/platform/s8_rehearsal.py
tests/unit/platform/test_s8_rehearsal.py
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Walkthrough
The pull request adds a driver to prepare, run, verify, and report an S8 serving rehearsal. It binds execution to a sealed S7 qualification and owner approval, records lifecycle evidence, and adds tests and documentation. The rehearsal remains unexecuted and human-owned.
Changes: S8 serving rehearsal
Layer / File(s)
Summary
Approval and preparation pixelgym/platform/s8_rehearsal.py, tests/unit/platform/test_s8_rehearsal.py, tests/integration/test_s8_rehearsal_local.py, docs/platform-design.md, docs/s7-serving-demo-proposal.md, docs/s8-rehearsal.md, scripts/README.md
Approval binding checks qualification and policy digests, package and report details, deployment caps, and demo terms. Preparation verifies the qualification and approval, backs up the paused send ledger, and writes a rehearsal plan. Documentation describes the inputs, commands, status, and boundaries.
The driver builds the serving stack and caller, then runs seven ordered lifecycle steps. The steps cover approval refusal, A and B deployments, interrupted-request recovery, a golden episode, attempt-cap enforcement, and rollback. Tests check send budgets, worker enforcement, cleanup, and retained failure evidence.
Evidence verification and reporting pixelgym/platform/s8_rehearsal.py, scripts/s8_rehearsal.py, tests/unit/platform/test_s8_rehearsal.py
The driver seals state, replays and verifies stored evidence, and renders reports without rerunning the lifecycle. CLI commands add network guards, finalization, verification, and reporting. Tests cover verification, reporting, CLI behavior, and tamper detection.
sequenceDiagram
participant Rehearsal
participant ServingStack
participant CallerEnvironment
participant SendLedger
Rehearsal->>ServingStack: execute ordered lifecycle steps
ServingStack->>CallerEnvironment: record caller actions and episode data
ServingStack->>SendLedger: reserve durable fake sends
ServingStack-->>Rehearsal: return lifecycle evidence
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Merge Risk: Low · up to 45eac
A very slow startup can leave a loopback port open in a long-running test process. This is a bounded, non-blocking risk.
Pre-merge checks: 4
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The title "Add the S8 serving rehearsal driver (prepare, run, verify, report)" names the main change. The PR adds the S8 rehearsal driver in pixelgym/platform/s8_rehearsal.py and scripts/s8_rehearsal.…
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The title "Add the S8 serving rehearsal driver (prepare, run, verify, report)" names the main change. The PR adds the S8 rehearsal driver in pixelgym/platform/s8_rehearsal.py and scripts/s8_rehearsal.py, with the prepare, run, verify, and report commands. The supporting docs, tests, and the Darwin integration test are secondary to that change. The title is short, specific, and free of file lists or vague terms.
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… document the loopback socket guard gap
- stored_report copies the failure record's lifecycle_complete flag instead of
forcing it false; render_report branches on the failure record and says a
completed lifecycle stopped at a later stage
- LoopbackCaller.close raises when the server thread is still alive after the
join timeout
- docs/s8-rehearsal.md and the scripts README state that --listener-port runs
without the in-process socket denial
…rify output, plan-derived cap
Review items on #274 (the previous commit already made stored_report copy the failure
record's lifecycle_complete flag and made LoopbackCaller.close raise on a lingering
server thread):
1. --listener-port now runs under loopback_only_sockets(): internet-family sockets may
bind, connect, or send datagrams only to the literals 127.0.0.1 and ::1, checked
before the system call; host names are refused so no resolver is consulted. The
docs and the scripts README describe the guard instead of its absence, and the
opt-in integration test runs the real listener under it.
3. verify no longer prints report_sha256. The acceptance subprocess runs verify before
acceptance-checks.json exists and the report includes that file, so the sealed
digest could never be re-derived. The acceptance test asserts it is absent.
5. Step 5 derives the probe count and the expected attempt numbers from the plan's
golden_action_count and B's deployment_attempt_cap instead of 21..24; the verifier
keeps only the journal-derived recovery counts and drops the lifecycle's own
additional_sends / same_deployment self-reports; a prepare that fails after creating
the state directory removes it so a retry is not refused; ledger_state is public and
the dead s8-b-after-cap skip is gone (refused creates are never recorded).
Not changed: run still verifies three times (finalize, the acceptance subprocess, and
the final verify). Cost only; each is a read of stored bytes.
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Actionable comments posted: 2
🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @pixelgym/platform/s8_rehearsal.py:
- Around line 354-362: Update `LoopbackCaller` to create and close an HTTP
connection for each `_request` instead of reusing one across requests, and store
the port for connection creation. Remove the persistent-connection cleanup from
`close()`; preserve the existing request and `Reply` behavior.
Review comments at @tests/unit/platform/test_s8_rehearsal.py:
- Around line 162-164: Replace the tautological assertion comparing inventory
with itself in the qualification test with the existing verify_seal check, so
changes to files in the sealed qualification are detected.
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Reviewing files that changed from the base of the PR and between a5b0167 and 6278474.
Files selected for processing: 8
docs/platform-design.md
docs/s7-serving-demo-proposal.md
docs/s8-rehearsal.md
pixelgym/platform/s8_rehearsal.py
scripts/README.md
scripts/s8_rehearsal.py
tests/integration/test_s8_rehearsal_local.py
tests/unit/platform/test_s8_rehearsal.py
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What changed
pixelgym/platform/s8_rehearsal.py: the S8 rehearsal driver.prepareverifies the sealed S7 qualification and an owner-supplied approval document, creates an isolated state directory outside Git, and takes a verified SQLite backup of the sealed qualification ledger.runexecutes the seven ordered lifecycle steps from the S7 proposal once (register and refuse unapproved B; A one-NOOP; B deploy with an interruption aftercanonical_response_persisted, a changed-context probe, app recreation throughrestore_active(), and identical resubmission; the 20-action golden episode with idempotent close; B redeploy, stale-episode refusal, and the exact 24-sendcap_reachedseal plus429 deployment_attempt_cap_reached; rollback to A, a refused rollback and a refused redeploy toward exhausted B with appended failure events; cleanup infinally).inspect_rehearsalis the stored-evidence verifier (hashes, SQLite integrity, caller-action replay with raw pixel differences, recovery/cap/rollback inspection).stored_report/render_reportread stored results only.scripts/s8_rehearsal.py:prepare,run,verify,report. No activation, approval, deployment, publication, archive, or LFS command.runrecords theverifysubprocess as an acceptance check with raw command, exit status, elapsed time, stdout, and stderr. Prepare/verify/report run under the strict no-socket guard; run denies internet-family sockets.tests/unit/platform/test_s8_rehearsal.py(36 tests over a synthetic qualification and an unenforced local worker, self-declared as such in the evidence) and the opt-intests/integration/test_s8_rehearsal_local.py(real Darwin sandbox, real127.0.0.1listener).docs/s8-rehearsal.md(commands, refusals, lifecycle, evidence layout, limits);docs/platform-design.mdstatus now says the S8 driver is implemented and the rehearsal is not executed; a short status section indocs/s7-serving-demo-proposal.md; ascripts/README.mdrow.Why
S8 was specified in the S7 proposal but had no driver. This lands the owner-controlled rehearsal tooling without executing it.
Binding constraint
Nothing the qualified packages bind to changes: worker, scripted policy, gate policy and
POLICY_SHA256, runtime lock generation, action fixtures,generate_task/golden_actions, and the frozen S2 schemas are untouched. The driver reuses the S7 preparer, budgeted transport, control store, coordinator, kind-aware runtime, and/api/v2router unchanged; the step-3 interruption uses the host's existinginterrupt_afterhook. The private successor qualification binds revision3b28658, where this driver does not exist; executing S8 against it needs a separate owner decision (fresh qualification at a revision containing the driver, or a run from a separate checkout). Nothing here records approval, runs the rehearsal, captures archives, or transfers to LFS.Every fake send, including the six contract smokes, is reserved durably in the backed-up campaign ledger before transport invocation. Expected sends: qualification 77, A 2, B 24, smoke 6 (109 of the 111 cap). The refused rollback toward exhausted B is stopped by the lineage rule before the preparer runs and consumes no smoke; the refused redeploy demonstrates the exhaustion check and consumes the sixth.
Tests run
ruff check .: all checks passed.ruff format --check .: 491 files already formatted.python -m mypy pixelgym: no issues in 159 files.python -m pytest -q -n 4 --dist worksteal tests/uniton the final commit: 3364 passed, 6 skipped, 191.86 s. (An earlier run on the first commit had 2 failures intest_grounding_evaluation_flow.py::test_flow_resumes_at_each_side_effect_boundary_without_duplicate_calls, a byte comparison of Metaflow resume outputs unrelated to this change; the same tests pass in isolation, 10 passed in 31.27 s.)PIXELGYM_RUN_V5_SANDBOX_TESTS=1 python -m pytest -q tests/integration/test_s8_rehearsal_local.pyon the final commit: 1 passed, 42.44 s. This qualifies a throwaway run from the clean checkout with the real Darwin sandbox and executes the rehearsal through a real loopback listener; all five worker proofs recorddarwin_sandbox_exec.Not done
The rehearsal itself, archive capture, LFS transfer, and any approval record. S8 remains a human-owned gate; no milestone verdict is implied.
Summary by CodeRabbit