{"id":1902,"job_id":4277,"problem_id":1,"lane_id":null,"type":"explore","user_id":1,"model":"claude-opus-5-5","provider":"anthropic","report_md":"# Job #4277: route 158 step check (monitored, interruptible pinned numerical stage)\n\nCaveat first: this is a record comparison only. No stage was run, no monitor was exercised and no numerical value was computed.\n\n**Outcome: promising.** Nothing on record answers the step, so it is copied unchanged (asserted equal to the route's served next_step and to #1898's copy).\n\n## Record since #1898\n- #1899 (route 160) and #1900 (route 164) are record comparisons. Neither runs a monitored, interruptible or restartable stage. #1900 hands that stage to route 158 explicitly.\n- #1869's run-compact46.py (sha 20bf6338aecc..., served) claims to be \"resumable and observable\". In the code it rewrites a progress JSON non-atomically after each task and never reads it back, so a restart recomputes everything. It also carries no manifest or input hash. A pursuit that monitors one (region, r) task of this runner is exercising a real, needed stage. Unless save/load wiring is added and shown across an interrupted-and-resumed boundary, its honest reuse claim is completed-output only.\n\n## Sources\n<project base>/research-routes/158; /return/1898, 1899, 1900, 1869; /files/20bf6338aecc5368f29280841706b8c6ee284c91ab5ef068951d1f3f9e3a113e (run-compact46.py, hash checked). No computation.\n\n35 of @Benjaminsen's returns wait for a verdict.\n\nTranscript: scrubbed by sah-py-1.0.5 (credential, account/session/device identifiers and local paths outside the working folder removed; earlier-session lines excluded; the setup lines from the joining instruction onward are kept).","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"measured","status":"recorded","final_rung":"recorded","created_at":"2026-09-26T22:36:50.956Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":[],"returns":[1898,1636],"messages":[]},"tokens":{"log":"claude-code","input":92,"models":{"claude-opus-5-5":21795},"output":21795,"source":"claude-jsonl","entries":46,"cache_read":3494831,"cache_write":100913,"observed_models":["claude-opus-5-5"]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":null,"verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"high","also_fix":null,"transcript_omitted":{"share":0.02127659574468085,"omitted":1,"outputs":47},"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":"2026-09-26T22:38:13.514Z","file_notes":null,"research":{"outcome":"promising","route_id":158,"next_step":{"method":"Use the monitor only inside an ownedOSprocess-tree limit. Choose one alreadyneeded smallpinnedstage,not a newlargeeigensolve merelyforobservability. Record supervisorliveness separately from stageprogress and artifactcommit. Exercise cooperativeSTOP and forcedtimeout; verifydescendantcleanup. Onrestart, validateparametermanifest andartifactintegrity before reuse. If intermediate-save/load wiring is added, show an actual interrupted-and-resumed boundary with matching output; otherwise advertisecompleted-vector-onlyreuse.","compute":{"ram_gb":0.5,"disk_gb":0.1,"cpu_hours":0.05},"failure":"Reporterfreeze, missing/corruptmetadata, partialartifactorunverifiedownership mustsurfaceasfailure. Do notclaim mid-stageexactresume or numericalcorrectness from heartbeatalone, and do not infer theworker ismakingprogress merelybecauseitsprocess exists.","success":"A boundedbinding-specific observation and recovery receipt naming exactlywhichartifact survived, with no falseprogressclaim, no silentmanifestrebind and no livingdescendants afterstop.","question":"For a genuinely required pinned numerical stage, does process-isolated telemetry remain live and does interruption preserve exactly the documented reusable artifact?","budget_hours":0.5,"required_tools":["python3"],"required_sources":[]},"depends_on":[1898,1636],"evidence_md":"The step is still open. It is copied unchanged.\n- Route 158 is at revision 4. Its last return is #1898 (this department, 2026-09-26), a step check that found the step open and copied it. The step itself was set by #1636 (accepted, verified), which exercised the monitor architecture on a harmless 2 s PyDLL GIL-hold fixture and ran no pinned numerical stage. Pursuit job 3310 is now listed as expired, and no pursuit has run the step.\n- Returns recorded after #1898: #1899 (route 160) and #1900 (route 164), both from this department and both record comparisons. Neither runs a monitored, interruptible or restartable stage. #1900 explicitly leaves \"the monitored, interruptible stage with checkpoint rejection\" to route 158 and builds no restart machinery. #1899's step (capped re-optimisation, gated on jobs 4254/4270) adds no instrument work.\n- One fact from #1900 bears on the pursuit's choice of stage (information, not a change to the step). #1869's served runner run-compact46.py (sha 20bf6338aecc...) says in its docstring that \"the run is resumable and observable\". The code does not support that claim. After each (region, r) task it rewrites out/compact46_k46_d17.json in place with open(path, \"w\"), which is not atomic. No code path reads that file back, and a restart starts from an empty result, so it recomputes every task and overwrites the progress file. The runner also records no parameter manifest or input hash. It is therefore a genuinely needed pinned stage (routes 159/160/164/167 depend on it), and its only reusable artifact is a completed output JSON. The step's own clause applies: advertise completed-output-only reuse unless save/load wiring is added and an interrupted-and-resumed boundary is shown. One (region, r) task is small enough for the step's 0.05 CPU-h.\n- The Ritz engine files are still unserved (per #1898), and #1615's dominance objection still does not bear on this operational step.","prior_art_md":"Search record reused from #1636 and #1898 (route 158's returns): Python ctypes documentation (https://docs.python.org/3/library/ctypes.html#ctypes.PyDLL, GIL held during PyDLL calls), #1615's reading of python-flint arb_mat.pyx/arb.pyx (no nogil), and #1610's ritz-ckpt.py control flow. No new web query was made, because the step is operational and unchanged. An empty search is not evidence of novelty.\nProject record checked this run: /research-routes/158 (revision 4, jobs 3184/3292/3310/4271/4277), /return/1898, 1899, 1900, 1869 (file list), and #1869's run-compact46.py from /files/<sha> (hash checked, 118 lines read)."},"research_route_id":158,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":null,"department_id":"dept_cc0a0b6ba2bdfadd5f9c50be","run_id":"run_8795b522e7a68a0591da3bba","triage_lead":null,"revision_base_sha":null,"integration":null,"resolves":null,"handle":"Benjaminsen","job_brief":"Step check before pursuit. Route #158's next experiment was set by return #1636, and returns were recorded after it on this route or a route linked to it by citations, dependencies or shared premises. Before a pursuit is spent on it, decide whether the returns already on record answer it. Read and compare; do not run the experiment and do not reproduce a computation a return already made.\n\nThe step:\n{\"method\":\"Use the monitor only inside an ownedOSprocess-tree limit. Choose one alreadyneeded smallpinnedstage,not a newlargeeigensolve merelyforobservability. Record supervisorliveness separately from stageprogress and artifactcommit. Exercise cooperativeSTOP and forcedtimeout; verifydescendantcleanup. Onrestart, validateparametermanifest andartifactintegrity before reuse. If intermediate-save/load wiring is added, show an actual interrupted-and-resumed boundary with matching output; otherwise advertisecompleted-vector-onlyreuse.\",\"compute\":{\"ram_gb\":0.5,\"disk_gb\":0.1,\"cpu_hours\":0.05},\"failure\":\"Reporterfreeze, missing/corruptmetadata, partialartifactorunverifiedownership mustsurfaceasfailure. Do notclaim mid-stageexactresume or numericalcorrectness from heartbeatalone, and do not infer theworker ismakingprogress merelybecauseitsprocess exists.\",\"success\":\"A boundedbinding-specific observation and recovery receipt naming exactlywhichartifact survived, with no falseprogressclaim, no silentmanifestrebind and no livingdescendants afterstop.\",\"question\":\"For a genuinely required pinned numerical stage, does process-isolated telemetry remain live and does interruption preserve exactly the documented reusable artifact?\",\"budget_hours\":0.5,\"required_tools\":[\"python3\"],\"required_sources\":[]}\n\nReturns to compare it with (the latest on this route first, then linked routes):\n- Return #1900 (route 164, progress, recorded, recorded): **Outcome: progress.** The step prepared a full corrected k = 46 run. That run is now on record, and it keeps r = 0. What is still open is the provenance of its degree-17 input. Nothing was rerun. **What the record settles (by step item).** - Full calculation, r = 0 kept. #1869 (accepted, measured; recorded 2026-09-26, after #1758 of 09-25) ran all 48 (region, r) tasks exactly on the faithful occ\n- Return #1899 (route 160, progress, recorded, recorded): **Outcome: progress.** No return on record answers route 160's question: does some symmetric F on T_46 give M^cap_{46,25/861}(F) > 1/A? #1869 (accepted, measured) left it as its stated obstacle, and #1893 and #1894 found no capped k = 46 value for any F except the #1606 witness. But the record changes four premises of #1642's step. Nothing was rerun. **What the record settles.** - The fixed-witne\n\nThe route's own returns: #1610, #1615, #1636, #1898 (GET <project base>/return/<id>).\n\nReturn the ordinary report and transcript plus research: {route_id: 158, outcome, evidence_md, depends_on}, with one of:\n- outcome \"known\": the returns you name in depends_on already answer the step; evidence_md says what each settles. No next_step. The route stops here and the pursuit is not handed out.\n- outcome \"progress\" with a new next_step that builds on the answer where they answer part of it; the old step is replaced.\n- outcome \"promising\" with the step above copied exactly as next_step when it is still open; the held pursuit then goes out with your note, and these returns never hold it again.","review_deferred":false,"in_triage":false,"triage":[],"verification_runs":[],"verification_state":null,"verification_summary":null,"canonical_return":null,"review_history":[],"dependencies":[{"id":"1636","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"1898","status":"recorded","final_rung":"recorded","canonical_return_id":null}],"research_url":"/projects/twin-primes/research-routes/158","transcript_url":"/projects/twin-primes/return/1902/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"duplicates":[],"cited_messages":[]}