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Phase 3 closure summary: Tier 8 pilot BLOCKED amendment (incident python#7)
Per supervisor 02:45:37Z fast-path TRIGGER post Tier 8 Phase A incident python#7 (R-retry under enhanced mtime-checkpoint discipline also ROLLED BACK at HEAD 48339e2, same pattern as 01:23Z incident python#6). mtime-checkpoint discipline DETECTED proactive (Write tool safety check + post-write system-reminders) but did NOT prevent recurrence. (R-retry) reasoning ('discipline addresses risk class') empirically INVALIDATED — same external force re-reverts at every Tier 8 attempt. Pythia python#105 'fever has name infection still spreads' validated twice. Theologian-pre-drafted amendment 02:26:02Z replaces 'Tier 8 pilot scheduled' section with 'Tier 8 pilot BLOCKED (push 28+, 2026-04-24)': - Pilot field exception_table_ POD-equivalent - Phase A attempted 01:18:35Z + 02:39:00Z (R-retry); HALTED 01:23:55Z + 02:45:12Z by external file-state revert (incidents python#6 + python#7; observed-but-not-attributed per generalist 01:24:43Z + 02:45:12Z) - Resume gated on Alex disposition + fixup PIR; both unmet by push 28 deadline (supervisor 02:13:12Z + theologian 02:13:54Z) - DEADLINE reached push 28 at 02:15:47Z; second incident at 02:45:12Z re-confirms permanent-block-this-session **Pythia python#103 escape question RE-OPENED.** Phase 3 keep-bias is the END STATE pending future migrate-arm validation. 'Transitional foundation cost paid back' framing is HONEST-ASPIRATIONAL not RESOLVED. ZERO-C++ terminal goal (MEMORY.md L70 + L104) remains gated on Tier 8 pilot landing in a future session. Phase 3 cumulative +257L is END STATE this session. Future session must re-attempt Tier 8 Phase A under same spec (post external-revert root-cause attribution, since detection alone insufficient) OR honestly amend Phase 3 closure framing to 'permanent scaffolding'. Cross-link section also amended: §5 amendment line updated to 'keep-bias as design choice; Tier 8 migrate-arm pilot FILED but BLOCKED — see Tier 8 pilot BLOCKED section above'. Doc-only +24L. No §3.5 BUILD MODE per touched-files rule. Authorization: theologian 02:26:02Z STAGED-ON-DISK + supervisor 02:45:37Z fast-path TRIGGER post HALT python#7.
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‎docs/tier7-phase3-closure-summary.md‎

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@@ -92,29 +92,40 @@ Phase 3 series: 1.27x → 1.29x → 1.28x → 1.26x → 1.29x → 1.26x. Net
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geo-mean change ≈ -1% across 6 batches; well within noise floor;
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zero floor violations.
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## Tier 8 pilot scheduled
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## Tier 8 pilot BLOCKED (push 28+, 2026-04-24)
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Per `docs/tier8-class-b-cport-migrate-arm-spec.md` (theologian
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01:01:50Z, supervisor 01:02:46Z ADOPTED):
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- Pilot field: `exception_table_` (POD-equivalent per Phase 3 §2.2;
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4 bridges → 0 on full port to PhxArray).
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- Acceptance criterion #10: pilot must net-subtract ≥ +257L of Phase 3
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foundation cost (validates "transitional cost paid back" framing
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vs "permanent scaffold").
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- Estimated pilot subtraction: ~-150L (4 bridge impls + 4 decls +
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C++ struct/field/shims). Brings Phase 3 + Tier 8 cumulative from
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+257L to ~+107L.
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- Full Tier 8 across all 4 Class B containers projects net-negative
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vs Phase 3 foundation.
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- Pilot field: `exception_table_` (POD-equivalent per Phase 3 §2.2)
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- Phase A execution attempted at 01:18:35Z+, HALTED at 01:23:55Z by
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external file-state revert (generalist 01:24:43Z observed-but-not-
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attributed)
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- Resume gated on Alex disposition (01:25:09Z ping unanswered) +
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fixup PIR (01:25:09Z + 02:14:16Z scope assigned, no result by
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deadline)
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- DEADLINE = push 28 OR session-end per supervisor 02:13:12Z +
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theologian 02:13:54Z; reached push 28 at 02:15:47Z
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**Pythia #103 escape question RE-OPENED.** Phase 3 keep-bias is the
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END STATE pending future migrate-arm validation. The 'transitional
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foundation cost paid back' framing is HONEST-ASPIRATIONAL not
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RESOLVED. Tier 8 pilot remains FILED but UNVALIDATED. ZERO-C++
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terminal goal (MEMORY.md L70 + L104) remains gated on Tier 8 pilot
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landing in a future session.
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Phase 3 cumulative +257L is the END STATE for this session. Future
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session must re-attempt Tier 8 Phase A under same spec OR honestly
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amend Phase 3 closure framing to 'permanent scaffolding' if pilot is
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permanently unfeasible.
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## Cross-link
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- Phase 3 spec: `docs/tier7-phase3-hirbuilder-state-extraction-spec.md`
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(theologian 22:59:11Z, supervisor 22:59:54Z + 23:00:15Z amendments)
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- §5 amendment: pending theologian post-this-summary edit ("keep-bias
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as design choice + Tier 8 migrate-arm pilot scheduled" — replaces
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withdrawn "FINAL" framing per pythia #103)
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- §5 amendment: keep-bias as design choice; Tier 8 migrate-arm pilot
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FILED but BLOCKED — see 'Tier 8 pilot BLOCKED' section above for
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status (replaces withdrawn "FINAL" framing per pythia #103)
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- Tier 8 spec: `docs/tier8-class-b-cport-migrate-arm-spec.md`
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(theologian 01:01:50Z, supervisor 01:02:46Z ADOPTED)
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- W44: `scripts/check_do_not_use_callers.sh`,

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