#000025 §10.11 + §10.13 + §10.14 — close the 5F battery

Closes the three open Phase-1b items of #000025; every §10 closure
criterion is now met, so the ticket flips to closed.

§10.14 — ForkScore threshold-calibration handoff to #000012.
bench/scripts/fivef_threshold_calibration.py (make bench-5f-threshold-
calibration) runs the canonical 5S/5T/5F packs + the 5F live packs and
reports baseline rates, observability granularity (1/n), and fork_score
verdicts on the parent vs synthetic child perturbations →
bench/results/5f-threshold-calibration-2026-05-11.md. Findings written
into ticket-000012 §8: keep SIGNAL_FLOOR / HARD_REGRESSION_FLOOR at
0.05; the small 5S packs (syntax n=10, semantics n=8) are coarser than
the floors so any regression there trips hard-reject (intended zero-
tolerance); the 5x averaging dilution in _delta_*; ceiling saturation
(every pack at 1.0 -> delta-rate terms <= 0). No constant change
shipped. 6 tests in tests/test_fivef_threshold_calibration.py.

§10.13 — feedback latency / efficiency on real workload.
run_feedback_loop now computes feedback_latency (listed in §5.5 since
Phase 1a, never implemented) — wall-clock seconds to apply a live
chain against its temp shard, surfaced per-task
(feedback_latency_seconds) + battery (feedback_latency_mean_seconds,
feedback_live_task_count). For live chains feedback_efficiency's cost
denominator switched from len(chain) (count of requested ops) to the
persisted footprint _persisted_cost = audit-event rows the chain
actually wrote + their body bytes / 1e6. Embedded chains keep
len(chain) and report feedback_latency_seconds = None. Latency is a
wall-clock field (run-to-run variable, like BatteryResult.timestamp)
and is not a fork_score input. 3 tests in tests/test_bench_batteries.py.

§10.11 — real selfmodel finetuning chains.
bench/scripts/selfmodel_chain_snapshot.py (make bench-5f-selfmodel-
snapshot) appends one chained SelfModel snapshot per run to a
persistent shard (~/.arborist/shards/selfmodel-chain.db, override via
ARBORIST_SELFMODEL_CHAIN_DB) with one CapabilityClaim per sub-battery
(metric = "5S-syntax" etc., measured_value = that pack's rate,
eval_digest = the pack's fixture digest, threshold = SIGNAL_FLOOR).
snapshot() auto-parents, so each snapshot is a distinct root and the
lineage grows by one per run. run_finetuning gains a third dispatch
mode — shard-chain (gated on a task's selfmodel_shard key) — via
_chain_finetuning_measure: reads the two most-recent snapshots
(latest() = child, its parent_selfmodel_root = parent) and measures
improvement on target_capability between them. This is the real
lineage replacing Phase-1a's synthetic parent->child pairs; the
chained delta reflects genuine cross-run drift (0.0 today — the
embedded packs are at ceiling). Operator pack
bench/fixtures/5f/finetuning-shardchain-v1.jsonl (6 tasks) + make
bench-5f-finetuning-shardchain; not in `make bench-5f`, `make test`,
or a fresh checkout (a missing/too-short chain fails honestly). The
real chain shard was bootstrapped 2-deep on 2026-05-11; make
chain-check-shards reports 0 breaks on it (and all other shards).
10 tests in tests/test_selfmodel_chain.py.

Full suite: 2311 passed, 28 skipped.

docs/TICKETS.md

@@ -112,7 +112,7 @@ Newest first. Update on every open/close.
 | #000028  | Multi-modality witness for canonical shapes    | closed · landed 2026-05-09 + follow-ups (capital ledger · sample rate) | 2026-05-08 | —         |
 | #000027  | Canonical projections persist to providence_cache | closed · landed 2026-05-09 | 2026-05-08 | —         |
 | #000026  | Real-shard workload baseline + search latency  | closed · Phase 1 + 2 + 3 landed 2026-05-09 (Phase 3 in `60b5748`) | 2026-05-08 | —         |
-| #000025  | 5F battery (Function · Finetuning · Falsification · Formulate · Feedback Loop) | in progress · Phase 1a + 1b.2 + 1c + 1d landed 2026-05-09; Phase 1e (motif coverage, §10.12 closed) landed 2026-05-10 | 2026-05-07 | —         |
+| #000025  | 5F battery (Function · Finetuning · Falsification · Formulate · Feedback Loop) | closed · 2026-05-11 — Phase 1a–1f landed 2026-05-09/10; Phase 1g (§10.13 feedback latency + persisted-footprint efficiency), 1h (§10.14 ForkScore threshold-calibration handoff → #000012 §8), 1i (§10.11 persistent SelfModel-chain lineage: `bench-5f-selfmodel-snapshot` grows the chain, `run_finetuning` shard-chain mode reads the 2 latest snapshots) all landed 2026-05-11. Every §10 closure criterion met | 2026-05-07 | —         |
 | #000024  | 5T Phase 1b + Dav1DPrometheus vocabulary alignment | closed · landed 2026-05-08 | 2026-05-07 | —         |
 | #000023  | 5S Phase 1b: Syllogism · Synthesis · Semiotics | closed · landed 2026-05-08 | 2026-05-07 | —         |
 | #000022  | Adapter LossReport (PRD I9 analogue)           | closed · landed 2026-05-07 | 2026-05-07 | —         |