12-EFT.WP.Methods.Repro v1.0 | Chapter 9 Run-time, Audit Trail, and Release

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Chapter 9 Run-time, Audit Trail, and Release

I. Scope and Objectives

1. Establish a unified gauge from orchestration to staged release, define verifiable audit-trail fields, and guarantee cross-version and cross-site reproducibility and forensicability.
2. Deliverables
   • The TS.* metric family and the minimum observation points for run-time monitoring and alerts.
   • An audit-event model, fingerprint and signature rules, and a chained anti-tamper construction.
   • Staged-release layers with rollback strategies, promotion gates, and observation windows.
   • Compliance templates, archival rules, and long-term forensic storage specifications.

II. Terms and Symbols

• TS.*: run-time observability metrics (examples: TS.lat_p95, TS.jitter, TS.drop_rate, TS.queue_depth, TS.hb_lag, TS.bp_state, TS.makespan).
• hb / bp: heartbeat and back-pressure semantics (aligned with Core.Threads).
• EnvLock: environment-lock evidence object; PipelineCard / ParamCard: pipeline/parameter cards.
• hash(•), fingerprint: artifact/environment digest functions and summaries.
• sig = sign( sk , m ): signature of message m with private key sk; verification ver( pk , m , sig ).
• Reproducibility and spectral metrics: delta_rep, R_coef, delta_psd, R_spectrum, r_tb (see Chapters 8 and 6).
• Release channels: canary, stable, LTS; promotion window T_obs; canary sample share r_canary.
• Dual arrival-time gauges (if applicable): T_arr = ( 1 / c_ref ) * ( ∫ n_eff d ell ) and T_arr = ( ∫ ( n_eff / c_ref ) d ell ); discrepancy delta_form.

III. Postulates and Minimal Equations

1. P31-16 Forensic run postulate
   When a run is executed under a fixed EnvLock, consistent PipelineCard and ParamCard, and TS.* is collected per specification, its audit-trail sequence is independently verifiable under a public key pk, and any tampering is detected as inconsistency.
2. P31-17 Conservative staged-release postulate
   Prior to passing gates in canary, user-visible effects are restricted to fraction r_canary, and rollback cost is upper-bounded by TS.makespan and the rollback clock T_rollback.
3. S32-30 Audit events and chain hash
   • Event: e_k = { ts , actor , action , inputs.hash , outputs.hash , code.hash , env.fingerprint , seed , path , notes }.
   • Event ID: id_k = hash( serialize( e_k ) ).
   • Chained accumulation: H_0 = hash( genesis ), H_k = hash( H_{k-1} || id_k ).
   • Bound signature: sig_k = sign( sk , H_k ); verification ver( pk , H_k , sig_k ) = true.
4. S32-31 Release-promotion gates
   • Over observation window T_obs, allow canary → stable if
     score >= tau_score and delta_rep^+ <= gate.rep and delta_psd^+ <= tau_psd and r_tb <= tau_tb.
   • After N_LTS consecutive stable windows with TS.incident_rate <= tau_inc, allow stable → LTS.
5. S32-32 Rollback triggers
   If any window hits score < tau_score or TS.hb_lag > tau_hb or TS.drop_rate > tau_drop, trigger rollback; deadline T_rollback, emit event with action = rollback.

IV. Data and Manifest Gauges

• Minimal audit-event field set
  audit.schema.version, e.id, e.ts, actor, action, run.id, EnvLock.fingerprint, PipelineCard.hash, ParamCard.hash, code.hash, rng.seed, inputs.hash, outputs.hash, H_k, sig_k, verifier.pk_ref, TS.snapshot, notes.
• Release bundle ReleaseBundle
  bundle.id = hash( manifest );
  manifest = { version , channel , commit , artifacts:[ uri , hash ] , cards:[ pipeline , param ] , gates , scores , windows , provenance };
  sig_bundle = sign( sk , bundle.id ) for third-party verification via ver( pk , bundle.id , sig_bundle ).
• Time base and arrival time (when declared)
  Report alpha, beta satisfying ts = alpha + beta * tau_mono; when T_arr is used, publish both gauges in parallel with delta_form, and provide the path gamma(ell) and measure d ell.

V. Algorithms and Implementation Bindings

1. I30-8 schedule_release(plan:dict) -> RollReport
   • Parse channel, r_canary, T_obs, and gate thresholds.
   • Coordinate execution graph and throttling (hb/bp), inject TS.* observation points.
   • Aggregate window scores and events; return promotion/rollback decisions and the trail.
2. I30-9 generate_audit_bundle(run:any) -> AuditBundle
   • Collect the e_k sequence and H_k, package verifier.pk_ref.
   • Produce sig_bundle and a verifiable manifest.
   • Output a bundle for ingestion and third-party verification.
3. I30-10 verify_bundle(bundle:any, pk:any) -> { valid:bool, diag:dict }
   • Validate the chain H_k and sig_k / sig_bundle.
   • Cross-check EnvLock, card hashes, and artifact fingerprints.
   • Report diff localization and the set of failing events.
4. I30-11 orchestrate_run(card:dict, quota:dict) -> { run.id:string, TS:dict }
   • Allocate resources for G = (V,E), monitor TS.makespan and the critical path.
   • Isolate and compensate on E_ENV_DRIFT, E_TIMEBASE_SKEW, E_NONDETERMINISM.

VI. Metrology Flows and Run Graph

1. Mx-45 run-orchestrate
   • Load EnvLock and cards.
   • Build the execution graph and enable TS.* collection.
   • Launch canary with rate-limit r_canary.
   • Emit run-time events e_k and update H_k rolling hash.
2. Mx-46 audit-trail-capture
   • Periodically checkpoint TS.snapshot and artifact fingerprints.
   • Sign each event link sig_k and write to append-only storage.
   • Create/refresh the AuditBundle and expose verifier.pk_ref.
3. Mx-47 staged-release
   • Aggregate score over T_obs per S32-31.
   • Promote channel on passing; otherwise trigger rollback per S32-32.
   • Any channel change is recorded as an event action ∈ { promote , rollback }.
4. Mx-48 compliance-archive
   • Archive ReleaseBundle, BenchReport, public notices, and verification results.
   • Publish hash indices and long-term access strategies (WORM / multi-site redundancy).
   • Record retention periods and re-verification plans.

VII. Verification and Test Matrix

1. Minimum required
   • Audit-chain integrity: construct e_1..e_K, verify H_K and all sig_k; expect valid = true.
   • Rollback playbook: inject a fault causing TS.drop_rate > tau_drop; expect rollback within T_rollback and an action = rollback event.
   • Promotion gate: within T_obs, meeting score >= tau_score etc. promotes canary → stable.
2. Boundary and extreme cases
   • Clock drift: make r_tb > tau_tb; expect promotion block and alert.
   • Key rotation: after replacing pk, historical bundles validate with the old key path, new bundles with the new key; both valid = true.
3. Statistical power
   For windowed score mean μ and variance s^2, choose the number of windows W such that
   W >= ceil( z_{1-β}^2 * s^2 / tau_score_margin^2 ), ensuring type-II error ≤ β for promotion.

VIII. Cross-References and Dependencies

• Core.Threads: execution graph, hb/bp, TS.* definitions and collection.
• Core.DataSpec: manifests and ingestion modes, append-only storage strategy.
• Core.Metrology: uncertainty and windowing; spectral gauges S_xx(f), U_w, ENBW.
• Chapter 5 EnvLock; Chapter 6 time-base alignment and randomness; Chapter 7 card structure; Chapter 8 benchmark scoring; Chapter 12 acceptance and release.

IX. Risks, Limits, and Open Questions

• Risks
  Metric-selection bias inflating score; jitter from too-short channel windows; single-point risk in centralized key custody for the audit chain.
• Limits
  For very large distributed jobs, TS.* granularity may be insufficient for fine-grained fault localization; cross-domain network latency jitter can amplify r_tb estimation error.
• Open questions
  Optimal control of adaptive r_canary and dynamic T_obs; cost/reliability trade-offs for hybrid on-/off-chain attestations; learning the weight of delta_form from dual T_arr gauges in release scoring.

X. Deliverables and Versioning

1. Deliverables
   • RunBook (orchestration and alert playbooks).
   • AuditBundle (containing H_K, sig_k, sig_bundle, verifier.pk_ref).
   • ReleaseBundle (channels, gates, scores, artifact fingerprints).
   • Public announcement package and third-party verification guide (verification steps and expected outputs).
   • Archive index and re-verification plan.
2. Version policy
   • Semantic versioning with channel-synchronized releases.
   • Every release must include change logs (see Appendix C) and verifiable signatures.
   • Rollback versions append to the existing audit chain; historical events must never be overwritten or deleted.