docs: refresh README and session handoff for current state

- README: add deep-comparison, post-hoc audit, and defense-preparation phases;
  correct the not-computed list (exploratory post-hoc tests now exist, with
  explicit small-n limits); add kisikisithesis/ and POSTHOC_STATISTICAL_AUDIT.md
  to the structure, artifact index, key documents, and reproduction commands.
- SESSION_HANDOFF.md: reflect HEAD 34bab45 and the post-16 sessions, document
  the prototype-snapshot tracking rule, refresh the next-session prompt.

README.md

@@ -170,7 +170,10 @@ Documented phases, in order. Session numbers are used only where the repository
 | Session 10 — 5G-NIDD a0.75 | second 5G-NIDD condition | `docs/research/5GNIDD_ALPHA075_BETA_VALIDATION.md`, `SESSION10_AUDIT.md` | audit PASS |
 | Session 11 — 5G-NIDD a0.25 | final condition; completes the grid | `docs/research/5GNIDD_ALPHA025_BETA_VALIDATION.md`, `SESSION11_AUDIT.md` | audit PASS |
 | Session 12 — synthesis | consolidate all six conditions | `docs/research/FINAL_EXPERIMENTAL_SYNTHESIS.md`, `CROSS_DATASET_BETA_ANALYSIS.md`, `docs/thesis/*`, `artifacts/analysis/final__*`, `artifacts/figures/final/*` | independent recomputation, zero mismatches |
+| Deep paired comparison | original vs proposed per condition | `docs/research/ORIGINAL_VS_PROPOSED_DEEP_COMPARISON.md`, `artifacts/analysis/deepcmp__*.csv`, `scripts/deep_comparison.py`, `scripts/make_comparison_figures.py` | manifest-hash pairing checks in code |
+| Post-hoc statistical audit | exploratory paired tests, selection stability | `docs/research/POSTHOC_STATISTICAL_AUDIT.md`, `artifacts/analysis/posthoc__*.csv`, `scripts/posthoc_statistical_audit.py` | manifest-hash pairing re-verified in code |
 | Proposal phase | write the thesis proposal and audit aids | `docs/proposal/*` | committed `e27c5a8` |
+| Defense preparation | robustness audit and examiner Q&A aids | `kisikisithesis/ROBUSTNESS_AUDIT_DAN_PERSIAPAN_PENGUJI.md`, `kisikisithesis/robustness_checks.py` | read-only checks over the actual implementation and persisted snapshots |
 | Handoff / README | keep repository state current | `docs/handoff/SESSION_HANDOFF.md`, `README.md` | this document |
 
 ## 7. Experiment Coverage and Reproducibility
@@ -234,9 +237,16 @@ run. No scikit-learn `classification_report` is used; metrics are pure NumPy.
 - **Per-seed** values and **pooled** values are different quantities; the pooled score averages
   per-seed per-client-mean scores.
 
-**Not computed by this repository:** micro-F1, ROC/AUC, statistical significance tests, and
-persisted per-class unseen-class recall (unseen-class evaluation is defined in code but only the
-unseen flags and union counts are saved).
+**Not computed by this repository:** micro-F1, ROC/AUC, and persisted per-class unseen-class
+recall (unseen-class evaluation is defined in code but only the unseen flags and union counts
+are saved).
+
+**Exploratory statistical audit (no inferential claims).** `scripts/posthoc_statistical_audit.py`
+(read-only) computes paired per-seed deltas for the selected beta and exploratory exact tests
+(two-sided sign-flip permutation, exact Wilcoxon signed-rank) plus paired-t 95% CIs — all with
+explicit small-n limitations: three seeds give a minimum attainable sign-flip p of 0.25, so no
+statistical significance is claimed anywhere. Outputs: `artifacts/analysis/posthoc__*.csv`;
+full discussion in `docs/research/POSTHOC_STATISTICAL_AUDIT.md`.
 
 ## 9. Quantitative Experimental Results
 
@@ -759,10 +769,11 @@ scripts/                training runner, partition generation, and read-only ana
 configs/                dataset, experiment protocol, and model configuration (YAML)
 docs/proposal/          thesis proposal and internal audit aids
 docs/research/          frozen protocol, per-condition reports, cross-alpha/cross-dataset synthesis,
-                        session audits
+                        post-hoc statistical audit, session audits
 docs/baseline/          PROTEAN baseline investigation, implementation, and validation
 docs/thesis/            Chapter 4 blueprint and claims register
 docs/handoff/           session handoff (start here for a new session)
+kisikisithesis/         robustness audit and examiner-preparation aids (read-only checks)
 planningawal/           immutable research specification (do not modify)
 artifacts/partitions/   deterministic frozen Dirichlet partition manifests (18)
 artifacts/analysis/     committed machine-readable analysis outputs
@@ -787,6 +798,12 @@ results/                local run outputs (git-ignored; 108 non-smoke run dirs +
 
 # beta=0 vs original equivalence audit (read-only)
 .venv/bin/python scripts/verify_beta0_equivalence.py --dataset 5gnidd --alpha 0.25 --seeds 0 1 2
+
+# post-hoc statistical audit (read-only; writes only posthoc__*.csv)
+.venv/bin/python scripts/posthoc_statistical_audit.py
+
+# deterministic robustness checks over the actual implementation (prints only)
+.venv/bin/python kisikisithesis/robustness_checks.py
 ```
 
 A full training run (not needed; the grid is complete) is:
@@ -842,6 +859,7 @@ Analysis outputs (`artifacts/analysis/`), by function:
 | Per-condition test | `*__multiseed__test_descriptive.csv` |
 | Cross-alpha | `{xiiotid,5gnidd}__cross_alpha__*.csv/.json` |
 | Cross-dataset | `cross_dataset__matched_alpha_summary.csv/.json`, `cross_dataset__beta_curve.csv` |
+| Post-hoc audit | `posthoc__paired_global_per_seed.csv`, `posthoc__paired_global_by_condition.csv`, `posthoc__paired_test_results.csv`, `posthoc__selection_stability.csv`, `posthoc__per_class_summary.csv`, `posthoc__per_client_summary.csv` |
 | beta=0 equivalence | `*__multiseed__beta0_equivalence.csv` |
 | Runtime | `*__multiseed__runtime.csv` |
 | Prototype snapshots & weights | `*__prototype_snapshot.json`, `*__prototype_weights.csv`, `*__prototype_effect*.csv` |
@@ -859,6 +877,7 @@ Key documents:
 | `docs/research/FINAL_EXPERIMENTAL_SYNTHESIS.md` | authoritative six-condition synthesis |
 | `docs/research/ORIGINAL_VS_PROPOSED_DEEP_COMPARISON.md` | paired original-vs-proposed deep comparison |
 | `docs/research/CROSS_DATASET_BETA_ANALYSIS.md` | cross-dataset comparison |
+| `docs/research/POSTHOC_STATISTICAL_AUDIT.md` | exploratory paired statistical audit of the completed grid |
 | `docs/research/XIIOTID_CROSS_ALPHA_ANALYSIS.md` | X-IIoTID cross-alpha analysis |
 | `docs/research/5GNIDD_CROSS_ALPHA_ANALYSIS.md` | 5G-NIDD cross-alpha analysis |
 | `docs/thesis/CHAPTER4_RESULTS_OUTLINE.md` | Chapter 4 blueprint |