55-Decision & Change Log Template v1.0 | Chapter 11 Implementation Binding Layer & Function Prototype Specification

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Chapter 11 Implementation Binding Layer & Function Prototype Specification

I. Chapter Goals & Scope (Mandatory)

• Ground this volume’s Decision & Change Records (DRs) in the Implementation Binding layer as stable API/CLI/Schema contracts and function prototypes, ensuring reproducibility, auditability, and replayability.
• Aligned with Ch.3 (Record Structure), Ch.4 (State Machine), Ch.6 (Impact), Ch.7 (Rollback Loop), Ch.8 (Sign-off), Ch.9 (Implementation & Verification), Ch.10 (Release Strategy).

II. Binding-Layer Structure & Naming (Mandatory)

• Interface tiers: domain (domain services) / data (data contracts) / ops (operations & release) / audit (audit exports).
• Naming: <namespace>.<resource>.<action>; versioning via semver and version_range.
• Unified response fields: code (enum), message (summary), data (payload), trace_id (trace).
• Error taxonomy: E_INPUT / E_STATE / E_GATE / E_DEP / E_SYS; each must be traceable to script@commit and data/contract versions.

III. Contract Consistency & Compatibility Policy (Mandatory)

• Compatibility line: field additions are BC; deletions/renames are Breaking and require a fallback with dual-stack for ≥ one observation window.
• Data contracts: both input and output must specify unit, dim, ci/uncertainty (if applicable) and pass check_dim.
• Anchor disclosure: list S/P/M/I anchors used in meta.anchors[] using “Volume vX.Y:Anchor”.

IV. Unified Symbols & Path/Formula Caliber (Mandatory)

1. Arrival-time examples:
   • Constant factored: T_arr = ( 1 / c_ref ) * ( ∫ n_eff d ell )
   • General form: T_arr = ( ∫ ( n_eff / c_ref ) d ell )
2. Any interface that returns or consumes T_arr must define path gamma(ell) and measure d ell in the same or adjacent paragraph (or cite their anchors); no mixing T_fil/T_trans, n/n_eff, c/c_ref; no Chinese in formulas/symbols/definitions.

V. API Design (REST/HTTP, Mandatory)

• Versioned path: /api/v{major}; plural resources; idempotency: GET idempotent, POST non-idempotent, PUT/PATCH conditional (If-Match).
• Pagination: page/size/next_token; sorting: sort=field:asc|desc; filtering: q= and structured filter[field]=op:value.
• Observability & audit: all writes return audit_ref and artifact_hash; repository sign-off per Ch.8.
• Rate limits: 429 with backoff hints; long-running tasks: 202 + Location for polling.

VI. Canonical Endpoint List (Copy-ready)

1. DR lifecycle
   • POST /api/v1/decisions (create)
   • GET /api/v1/decisions/{id} (read)
   • POST /api/v1/decisions/{id}/review|approve|implement|verify|archive|rollback (transition)
   • GET /api/v1/decisions/{id}/audit (export: yaml/json/pdf)
2. Impact & gates
   • POST /api/v1/impact/assess (submit assessment pack)
   • GET /api/v1/impact/{id} (assessment + total S)
   • POST /api/v1/gates/check (batch gate check)
3. Implementation & replay
   • POST /api/v1/impl/run (trigger implementation plan)
   • POST /api/v1/replay/run (replay/shadow evaluation)
   • GET /api/v1/replay/{rid} (replay results & coverage)
4. Release & version graph
   • POST /api/v1/release; GET /api/v1/release/{id}
   • GET /api/v1/version/graph (trunk/draft/hotfix graph)

VII. Function Prototypes (Language-agnostic, Mandatory)

create_decision(record: DecisionRecord) -> DecisionID

assess_impact(id: DecisionID, pack: EvidencePack) -> ImpactReport

check_gates(items: List[GateSpec]) -> GateResultSet

approve(id: DecisionID, signers: List[Signer]) -> ApprovalStatus

implement(id: DecisionID, plan: ImplementationPlan) -> ExecutionStatus

verify(id: DecisionID, suite: RegressionSuite) -> VerificationReport

rollback(id: DecisionID, trigger: TriggerSpec) -> RollbackReport

export_audit(id: DecisionID, fmt: ["yaml","json","pdf"]) -> ArtifactRef

release_new(rel: ReleaseSpec) -> ReleaseID

get_version_graph() -> VersionGraph

VIII. Machine-Readable Schemas (Core Objects, YAML; JSON equivalent, Mandatory)

DecisionRecord:

id: "DR-YYYY-NNNN"

title: ""

status: "Draft|Review|Approved|Implemented|Verified|Archived|RolledBack"

requester: { name: "", role: "Requester" }

approvers: [{ name: "", role: "Approver" }]

created_at: "YYYY-MM-DD"

effective_at: "YYYY-MM-DD"

motive: ""

options: [{ name:"", assumptions:[], pros:[], cons:[] }]

decision: ""

rollback: { triggers:[], steps:[] }

impact:

dimensions: {}

scoring: { k_sigma: 1.0 }

verification:

gates: { hard:[], soft:[] }

regression_suite: { cases:[], coverage:{ functional:"", path:"", data:"" } }

references:

see:

- "EFT.WP.Core.Equations v1.1:S20-1"

- "EFT.WP.Core.Metrology v1.0:check_dim"

GateSpec:

name: "gate_accuracy"

rule: ">=0.99@7d"

source: { dataset:"", script:"script@commit" }

ImpactReport:

S: 0.0

ci95: [0.0, 0.0]

dimensions: { performance:{ s:0.0, sigma:0.0, s_adj:0.0 }, ... }

ImplementationPlan:

plan_id: "IMP-YYYY-NNNN"

milestones: []

env: { domains:[], images:[], flags:[], config:{} }

data_scripts: { datasets:[], scripts:[], container:"", repro_cmd:"" }

VerificationReport:

gates: { passed: true, details: [{ name:"gate_accuracy", value:"0.993@7d" }] }

regression: { pass_rate:"0.99", failed:[] }

artifacts: ["yaml","json","pdf"]

ReleaseSpec:

semver: "x.y.z"

channel: "alpha|beta|stable|lts"

scope: { modules:[], contracts:[], regions:[] }

gates: { hard:[], soft:[] }

rollback: { baseline:"", triggers:[] }

IX. Security, Rate Limiting & Audit (Mandatory)

• Security: OAuth2/OIDC; least-privilege (RBAC); multi-party confirmation for sign-off and state transitions (MFA/multi-sign).
• Rate limiting: global and per-actor quotas; return Retry-After; support Idempotency-Key.
• Audit: record timestamp/actor/action/resource/hash/evidence_ref for all writes; exported artifacts stored and aligned with sign-off (Ch.8).

X. Performance & Availability SLO (Mandatory)

• Example SLOs: p95_latency<=200ms@1d, availability>=99.9%@30d, error_rate<=1e-3@1d.
• Breaches: follow Ch.7 triggers; auto-execute rollback API and issue a RollbackReport when required.

XI. Monitoring & Observability (Mandatory)

• Metrics: requests, latency, errors, rate-limit hits, replay coverage, gate pass rate.
• Logging: structured JSON with trace_id/span_id/decision_id/release_id.
• Tracing: end-to-end tracing across DR → implementation → verification → release → rollback.

XII. Example: Arrival-Time Estimation & Validation (Copy-ready)

1. API: POST /api/v1/arrival-time/estimate
   • Request:
   • {
   • "path": "gamma(ell)",
   • "measure": "d ell",
   • "c_ref": "ref:L2",
   • "n_eff_profile": "dataset:cmb_set_v3@v3",
   • "mode": "general" // general|factored
   • }
   • Response:
   • {
   • "code": "OK",
   • "data": {
   • "T_arr": "( ∫ ( n_eff / c_ref ) d ell )",
   • "value": 12.345,
   • "unit": "s",
   • "anchors": [
   • "EFT.WP.Core.Equations v1.1:S20-1",
   • "EFT.WP.Core.Metrology v1.0:check_dim"
   • ]
   • },
   • "trace_id": "..."
   • }
2. Prototype: estimate_arrival_time(req: ArrivalReq) -> ArrivalResp
3. Validation gates: gate_accuracy>=0.99@7d, compat_rate>=0.995@replay

XIII. Human × Machine Alignment (Mandatory)

XIV. Cross-Reference Style (Mandatory)

1. Fixed in-text format: “See 《 vX.Y》 Ch.x S/P/M/I…”, anchors preferred over whole volumes.
2. Provide a machine-readable list in the DR’s references.see (examples):
   • "EFT.WP.Core.Terms v1.0:P10-3"
   • "EFT.WP.Core.Equations v1.1:S20-1"
   • "EFT.WP.Core.Metrology v1.0:check_dim"
   • "EFT.WP.Core.DataSpec v1.0:I30-2"