Core System Architecture Part 127 — Anonymous Network Product Qualification, Feature Maturity Levels, Capability Readiness, General Availability Criteria & Privacy-Preserving Product Readiness Governance Architecture
SIAR — Secure, Local-First, Multi-Transport Communication Platform
Series: Core System Architecture
Part: 127
Status: Architecture specification
Primary language: Rust
Builds on: Core System Architecture Parts 93, 99, 108–126
Primary purpose: define SIAR's product-readiness governance architecture for feature maturity, capability qualification, alpha/beta/preview/GA transitions, readiness dimensions, operational/support/security/privacy readiness, dependency readiness, launch criteria, rollout restrictions, retirement, evidence, and privacy-preserving product qualification.
1. Purpose
A feature can be technically implemented and still be unready for broad use.
Production readiness requires answers to questions such as:
Is the capability functionally complete?
Is it secure enough for intended scope?
Is privacy behavior understood and verified?
Can operations support it?
Can it recover from failure?
Can it be upgraded and rolled back?
Are dependencies mature enough?
Can users understand limitations honestly?
The governing principle is:
SIAR product readiness should be based on explicit capability maturity, multidimensional evidence, controlled scope, operational supportability, and reversible rollout—not on marketing pressure, adoption targets, or hidden user-behavior profiling.
2. Architectural Position
CAPABILITY IDEA
│
▼
EXPERIMENTAL
│
▼
ALPHA
│
▼
BETA
│
▼
PREVIEW
│
▼
GA CANDIDATE
│
▼
GA
│
▼
MATURE / DEPRECATED
Transitions are governed by evidence.
3. Core Separation
Keep distinct:
implementation complete
feature maturity
technical qualification
release qualification
product readiness
general availability
adoption
business success
4. Non-Goals
Part 127 does not create:
user engagement scoring
growth-driven launch bypass
feature maturity based on usage volume
developer performance scoring
marketing-led technical certification
5. Capability Identity
#![allow(unused)] fn main() { pub struct CapabilityId(pub [u8; 16]); }
Stable, opaque, never reused.
6. Capability Record
#![allow(unused)] fn main() { pub struct Capability { pub id: CapabilityId, pub name: String, pub scope: CapabilityScope, pub maturity: CapabilityMaturity, pub owner: CapabilityOwnerRef, } }
7. Capability Scope
#![allow(unused)] fn main() { pub enum CapabilityScope { Platform, Service(ServiceId), Protocol(ProtocolId), ClientPlatform(PlatformClass), EnterpriseOnly, ExperimentalLab, } }
8. No Individual User Scope
Hard rule.
9. Capability Maturity
#![allow(unused)] fn main() { pub enum CapabilityMaturity { Experimental, Alpha, Beta, Preview, GaCandidate, GeneralAvailability, Mature, Deprecated, Retired, } }
10. No Direct Experimental→GA
Hard rule.
11. Maturity Meaning
Experimental
unstable
not compatibility guaranteed
not production-supported
Alpha
core concept works
major gaps expected
limited scope
Beta
feature mostly complete
known limitations
broader qualification
Preview
near-production
operational/support readiness exercised
compatibility direction stable
GA Candidate
all mandatory readiness gates completed
awaiting launch decision
General Availability
supported
documented
operationally owned
qualified for intended production scope
12. Hard Rule
Maturity state describes actual support/assurance level, not marketing terminology.
13. Readiness Dimensions
#![allow(unused)] fn main() { pub struct CapabilityReadiness { pub functional: ReadinessState, pub security: ReadinessState, pub privacy: ReadinessState, pub reliability: ReadinessState, pub performance: ReadinessState, pub operability: ReadinessState, pub supportability: ReadinessState, pub compatibility: ReadinessState, pub recovery: ReadinessState, pub documentation: ReadinessState, } }
14. Readiness State
#![allow(unused)] fn main() { pub enum ReadinessState { Unknown, NotReady, Partial, ReadyWithConditions, Ready, } }
15. No One Readiness Score
Hard rule.
16. Why
A feature can be:
functionally ready
but privacy not ready
or:
secure
but operationally unsupported
One score hides this.
17. Readiness Evidence
#![allow(unused)] fn main() { pub struct ReadinessEvidence { pub capability: CapabilityId, pub dimension: ReadinessDimension, pub evidence: Vec<EvidenceRef>, pub state: ReadinessState, } }
18. Evidence Required
Hard rule.
19. Readiness Dimension
#![allow(unused)] fn main() { pub enum ReadinessDimension { Functional, Security, Privacy, Reliability, Performance, Operability, Supportability, Compatibility, Recovery, Documentation, } }
20. Qualification Profile
Different capability classes require different evidence.
#![allow(unused)] fn main() { pub struct CapabilityQualificationProfile { pub capability: CapabilityId, pub required_dimensions: BTreeSet<ReadinessDimension>, pub assurance_class: AssuranceClass, } }
21. Hard rule.
22. Functional Readiness
Requires:
approved requirements
acceptance criteria
implementation complete
verification evidence
known limitations documented
23. Hard rule.
24. Security Readiness
Requires:
threat model
authorization review
fuzz/static testing where applicable
security controls verified
no unresolved hard security defects
25. Hard rule.
26. Privacy Readiness
Requires:
data-flow mapping
retention/deletion policy
metadata analysis
consent/control behavior
privacy tests
27. No Hidden Telemetry
Hard rule.
28. Reliability Readiness
Requires:
SLO definition
failure-mode analysis
recovery behavior
capacity headroom
fault-domain validation
29. Hard rule.
30. Performance Readiness
Requires:
latency budget
throughput target
resource budget
representative benchmark
31. Hard rule.
32. Operability Readiness
Requires:
monitoring
alerts
runbook
on-call ownership
safe configuration
diagnostics
33. Hard rule.
34. Supportability Readiness
Requires:
known-issue documentation
support escalation path
user-facing limitations
diagnostic support
35. Hard rule.
36. Compatibility Readiness
Requires:
version policy
migration behavior
upgrade compatibility
rollback behavior
37. Hard rule.
38. Recovery Readiness
Requires:
backup/restore or local recovery where applicable
rollback
failover
state reconciliation
39. Hard rule.
40. Documentation Readiness
Requires:
operator docs
user docs
API docs
limitations
migration guidance
41. Hard rule.
42. Capability Qualification
#![allow(unused)] fn main() { pub struct CapabilityQualification { pub capability: CapabilityId, pub maturity_target: CapabilityMaturity, pub readiness: CapabilityReadiness, pub evidence_digest: Digest, } }
43. Qualification State
#![allow(unused)] fn main() { pub enum CapabilityQualificationState { Incomplete, Reviewable, QualifiedWithConditions, Qualified, Rejected, } }
44. Qualified Requires Mandatory Dimensions Ready
Hard rule.
45. Conditional Qualification
Only for non-hard gaps.
46. Hard rule.
47. Maturity Transition
#![allow(unused)] fn main() { pub struct MaturityTransitionRequest { pub capability: CapabilityId, pub from: CapabilityMaturity, pub to: CapabilityMaturity, pub qualification: CapabilityQualificationId, } }
48. Transition Validation
#![allow(unused)] fn main() { pub trait CapabilityMaturityPolicy { fn allowed( &self, from: CapabilityMaturity, to: CapabilityMaturity, ) -> bool; } }
49. Hard rule.
50. Alpha Entry Criteria
Typical:
core path implemented
critical safety/security design complete
basic test evidence
scope restricted
51. Alpha Constraints
May permit:
API changes
limited compatibility
limited support
52. Must be labeled clearly.
53. Hard rule.
54. Beta Entry Criteria
Typical:
functional completeness high
critical security/privacy gates passed
integration/E2E tests
migration direction understood
55. Beta Constraints
Known limitations remain explicit.
56. Hard rule.
57. Preview Entry Criteria
Typical:
support path
on-call readiness
recovery exercises
representative performance evidence
58. Hard rule.
59. GA Candidate Criteria
Requires all mandatory launch dimensions.
60. Hard rule.
61. GA Criteria
GA should require:
requirements satisfied
release qualified
security/privacy ready
SLO defined
capacity ready
operations ready
support ready
docs complete
upgrade/rollback tested
recovery verified
62. Hard rule.
63. GA Decision
#![allow(unused)] fn main() { pub struct GeneralAvailabilityDecision { pub capability: CapabilityId, pub qualification: CapabilityQualificationId, pub release: ReleaseId, pub decision: GaDecision, } }
64. GA Decision
#![allow(unused)] fn main() { pub enum GaDecision { Approve, ApproveWithConditions, Reject, } }
65. No Marketing-Only Approval
Hard rule.
66. GA Authority
Scoped.
#![allow(unused)] fn main() { pub enum ProductReadinessAuthority { ProductOwner, ServiceOwner, SecurityAssurance, PrivacyAssurance, ReliabilityAssurance, ReleaseEngineering, } }
67. Critical Capabilities Require Multiple Authorities
Hard rule.
68. Separation Of Duties
Product owner cannot alone override security/privacy/reliability block.
69. Hard rule.
70. Capability Dependency
#![allow(unused)] fn main() { pub struct CapabilityDependency { pub capability: CapabilityId, pub depends_on: CapabilityId, pub minimum_maturity: CapabilityMaturity, } }
71. Hard rule.
72. Dependency Readiness
A capability cannot become GA if required dependency is below permitted maturity.
73. Hard rule.
74. External Dependency Readiness
Track:
provider stability
API compatibility
SLA
security posture
exit strategy
75. Hard rule.
76. Protocol Dependency
Protocol support maturity independent from UI feature maturity.
77. Hard rule.
78. Feature Flag
Maturity != feature flag.
79. Hard rule.
80. Feature Flag Purpose
Controls exposure.
81. Maturity Purpose
Describes qualification/support state.
82. Hard rule.
83. Exposure Scope
#![allow(unused)] fn main() { pub enum CapabilityExposure { Disabled, InternalOnly, Lab, OptIn, ManagedPilot, BroadPreview, DefaultOn, } }
84. Exposure Must Not Exceed Maturity Policy
Hard rule.
85. Example
Experimental cannot be DefaultOn.
86. Hard rule.
87. Rollout Policy
#![allow(unused)] fn main() { pub struct CapabilityRolloutPolicy { pub capability: CapabilityId, pub maturity: CapabilityMaturity, pub exposure: CapabilityExposure, pub rollback: RollbackStrategy, } }
88. Hard rule.
89. Rollback Strategy
#![allow(unused)] fn main() { pub enum RollbackStrategy { DisableFlag, RollbackRelease, DualReadFallback, MigrationRollback, ForwardFixOnly, } }
90. ForwardFixOnly
Requires explicit risk review.
91. Hard rule.
92. Migration Readiness
Data/schema-changing feature requires:
forward migration
compatibility window
rollback/restore plan
93. Hard rule.
94. Irreversible Migration
Requires stronger qualification.
95. Hard rule.
96. Capability Data Footprint
#![allow(unused)] fn main() { pub struct CapabilityDataFootprint { pub stores: BTreeSet<DataStoreId>, pub retention_policy: RetentionPolicyRef, pub deletion_behavior: DeletionBehaviorRef, } }
97. Hard rule.
98. Privacy Expansion Review
Any capability that adds:
new data class
new identifier
new telemetry
new cross-service flow
requires privacy review.
99. Hard rule.
100. Network/Anonymity Readiness
Anonymous-network capability must specify:
routing mode
fallback behavior
metadata guarantees
failure behavior
101. No Silent Privacy Downgrade
Hard rule.
102. Local-First Readiness
Capabilities must define:
offline behavior
sync behavior
conflict behavior
recovery behavior
where applicable.
103. Hard rule.
104. Multi-Device Readiness
If applicable:
device fanout
revocation
recovery
state convergence
105. Hard rule.
106. Mobile Readiness
Android:
background lifecycle
battery impact
permissions
offline behavior
push wake
107. Hard rule.
108. Desktop Readiness
Desktop:
daemon lifecycle
upgrade
resource budget
crash recovery
109. Hard rule.
110. Enterprise Readiness
If offered:
tenant isolation
admin policy
audit
provisioning
support
111. Hard rule.
112. Federation Readiness
If federated:
peer compatibility
trust boundaries
failure isolation
version negotiation
113. Hard rule.
114. Accessibility Readiness
User-facing capability must meet relevant accessibility baseline.
115. Hard rule.
116. Localization Readiness
If capability exposes translated UI:
string extraction
layout tolerance
fallback language
117. Hard rule.
118. Documentation Maturity
#![allow(unused)] fn main() { pub enum DocumentationMaturity { Draft, Internal, PreviewReady, GaReady, } }
119. Hard rule.
120. Support Readiness
#![allow(unused)] fn main() { pub struct SupportReadiness { pub escalation_path: bool, pub diagnostics_available: bool, pub known_issues_documented: bool, pub runbook_available: bool, } }
121. Hard rule.
122. Support Boundary
Support tooling cannot bypass privacy/security to make debugging easier.
123. Hard rule.
124. Operational Readiness Review
ORR-style review.
#![allow(unused)] fn main() { pub struct OperationalReadinessReview { pub capability: CapabilityId, pub monitoring: ReadinessState, pub alerts: ReadinessState, pub runbook: ReadinessState, pub recovery: ReadinessState, pub oncall: ReadinessState, } }
125. Hard rule.
126. Security Readiness Review
#![allow(unused)] fn main() { pub struct SecurityReadinessReview { pub threat_model: EvidenceRef, pub critical_findings_open: usize, pub fuzzing: ReadinessState, pub authorization_tests: ReadinessState, } }
127. Hard rule.
128. Privacy Readiness Review
#![allow(unused)] fn main() { pub struct PrivacyReadinessReview { pub data_flow_review: ReadinessState, pub retention_review: ReadinessState, pub metadata_review: ReadinessState, pub deletion_tests: ReadinessState, } }
129. Hard rule.
130. Reliability Readiness Review
#![allow(unused)] fn main() { pub struct ReliabilityReadinessReview { pub slo_defined: bool, pub error_budget_policy: bool, pub failure_tests: ReadinessState, pub recovery_drill: ReadinessState, } }
131. Hard rule.
132. Launch Checklist
Generated from capability class.
133. No Static Universal Checklist
Hard rule.
134. Checklist Items
#![allow(unused)] fn main() { pub struct LaunchCriterion { pub criterion_id: LaunchCriterionId, pub dimension: ReadinessDimension, pub mandatory: bool, pub evidence_required: Vec<EvidenceKind>, } }
135. Hard rule.
136. Launch Criterion State
#![allow(unused)] fn main() { pub enum LaunchCriterionState { Pending, Passed, Failed, Waived, NotApplicable, } }
137. Hard Criteria Cannot Be Waived
Hard rule.
138. Launch Exception
For waivable criterion only.
#![allow(unused)] fn main() { pub struct ProductReadinessException { pub capability: CapabilityId, pub criterion: LaunchCriterionId, pub rationale: ExceptionRationale, pub expires_at: Timestamp, pub compensating_controls: Vec<ControlId>, } }
139. Hard rule.
140. Exception Expiry
Automatic.
141. Hard rule.
142. Pilot Program
Managed pilot can expose Beta/Preview capability.
143. Pilot Scope
#![allow(unused)] fn main() { pub struct PilotScope { pub capability: CapabilityId, pub environment: EnvironmentClass, pub tenant_scope: Option<TenantId>, pub expires_at: Timestamp, } }
144. No Individual User Targeting Baseline
Hard rule.
145. Pilot Evidence
Collect:
technical failures
performance
operational issues
support issues
146. Avoid hidden behavioral analytics.
147. Hard rule.
148. Product Telemetry Boundary
Readiness telemetry may include:
error rates
latency
resource use
crashes
149. Not:
user psychology
engagement addiction
social graph
private content
150. Hard rule.
151. Adoption Metrics
Adoption can inform product planning, but not technical readiness.
152. Hard rule.
153. GA Is Not "Enough Users"
Hard rule.
154. Readiness Trend
#![allow(unused)] fn main() { pub enum ReadinessTrend { Improving, Stable, Regressing, Unknown, } }
155. Based on technical evidence.
156. Hard rule.
157. Readiness Freshness
#![allow(unused)] fn main() { pub enum ReadinessFreshness { Fresh, DueForReview, Stale, } }
158. Stale Critical Evidence Blocks Transition
Hard rule.
159. Evidence Invalidation
Triggered by:
major code change
dependency change
threat model change
architecture change
migration change
160. Hard rule.
161. Maturity Regression
GA capability may regress.
162. Example:
critical security issue
major reliability regression
dependency instability
163. Hard rule.
164. Maturity Regression State
#![allow(unused)] fn main() { pub enum MaturityRegressionAction { RestrictExposure, SuspendCapability, Rollback, Deprecate, } }
165. Hard rule.
166. GA Suspension
Possible.
167. Hard rule.
168. Capability Suspension
#![allow(unused)] fn main() { pub struct CapabilitySuspension { pub capability: CapabilityId, pub reason: SuspensionReason, pub effective_at: Timestamp, } }
169. Hard rule.
170. Deprecation
Capability may move:
GA → Deprecated → Retired
171. Hard rule.
172. Deprecation Policy
#![allow(unused)] fn main() { pub struct CapabilityDeprecationPolicy { pub capability: CapabilityId, pub deprecated_at: Timestamp, pub replacement: Option<CapabilityId>, pub removal_not_before: Timestamp, } }
173. Hard rule.
174. Emergency Deprecation
Security/privacy reason may accelerate.
175. Hard rule.
176. Retirement Criteria
Requires:
no supported dependencies remain
migration path completed
data lifecycle handled
docs updated
177. Hard rule.
178. Capability Readiness Baseline
#![allow(unused)] fn main() { pub struct CapabilityReadinessBaseline { pub baseline_id: CapabilityReadinessBaselineId, pub capability: CapabilityId, pub maturity: CapabilityMaturity, pub qualification_digest: Digest, } }
179. Immutable
Hard rule.
180. Release Binding
A release references capability readiness baseline.
181. Hard rule.
182. Historical Reconstruction
"What maturity/readiness did feature X have in release Y?"
Core requirement.
183. Hard rule.
184. Product Qualification Record
#![allow(unused)] fn main() { pub struct ProductQualificationRecord { pub capability: CapabilityId, pub release: ReleaseId, pub readiness_baseline: CapabilityReadinessBaselineId, pub qualification_state: CapabilityQualificationState, } }
185. Hard rule.
186. Qualification Archive
Part 126.
Store:
readiness baseline
qualification evidence
GA decision
exceptions
maturity transitions
187. Hard rule.
188. Requirement Integration
Part 124.
Capability references requirement set.
189. Hard rule.
190. Verification Integration
Part 125.
Readiness evidence comes from qualification evidence.
191. Hard rule.
192. Architecture Governance Integration
Part 122.
Major capability changes require ADR/design review.
193. Hard rule.
194. Knowledge Graph Integration
Part 123.
Trace:
capability
→ requirements
→ ADRs
→ implementation
→ tests
→ release
195. Hard rule.
196. Risk Integration
Part 121.
Open risks visible in readiness review.
197. Critical unaccepted risk blocks GA.
198. Hard rule.
199. PIR Integration
Part 120.
Repeated incidents may cause maturity regression.
200. Hard rule.
201. Release Readiness Integration
Part 108.
Product readiness complements release readiness.
202. Hard rule.
203. SLO Integration
Part 109.
GA service should have SLO/error budget where relevant.
204. Hard rule.
205. Resilience Integration
Part 110.
GA requires supported failure-mode behavior.
206. Hard rule.
207. Capacity Integration
Part 111.
GA requires capacity forecast/headroom.
208. Hard rule.
209. Performance Integration
Part 112.
GA requires representative performance qualification.
210. Hard rule.
211. Efficiency/Sustainability Integration
Parts 113–114.
Resource requirements should be acceptable and documented.
212. Hard rule.
213. Hardware/Facility Integration
Parts 115–118.
Capability depending on physical infra must have hardware/facility readiness.
214. Hard rule.
215. Crisis/Incident Integration
Parts 119–120.
Operational incident response paths must exist before GA.
216. Hard rule.
217. Compatibility Matrix
Capability can depend on platform/client versions.
#![allow(unused)] fn main() { pub struct CapabilityCompatibilityMatrix { pub capability: CapabilityId, pub supported_clients: VersionRange, pub supported_protocols: VersionRange, pub supported_servers: VersionRange, } }
218. Hard rule.
219. Platform Matrix
Linux
Windows
Android
server
Readiness evaluated per supported platform.
220. Hard rule.
221. Partial Platform GA
Allowed only if clearly scoped.
222. Hard rule.
223. Capability Variant
#![allow(unused)] fn main() { pub enum CapabilityVariant { Desktop, Android, Server, Enterprise, AnonymousMode, } }
224. Each Variant Can Have Separate Readiness
Hard rule.
225. Privacy Mode Readiness
Anonymous mode cannot inherit Standard-mode readiness automatically.
226. Hard rule.
227. Offline Mode Readiness
Local-first/offline behavior independently qualified.
228. Hard rule.
229. Degraded Mode Readiness
Define behavior when dependencies unavailable.
230. Hard rule.
231. Support Contract
#![allow(unused)] fn main() { pub enum SupportLevel { Unsupported, BestEffort, PreviewSupport, ProductionSupport, } }
232. Maturity Maps To Minimum Support Level
Hard rule.
233. GA Requires ProductionSupport
Hard rule.
234. Compatibility Promise
#![allow(unused)] fn main() { pub enum CompatibilityPromise { None, Limited, Stable, } }
235. GA Requires Stable For Public Interfaces Where Applicable
Hard rule.
236. Migration Promise
GA requires documented upgrade path.
237. Hard rule.
238. Data Exit
Capability storing user/customer data should support export/delete/migration as appropriate.
239. Hard rule.
240. Observability Readiness
Metrics must be:
technical
bounded-cardinality
privacy-safe
241. Hard rule.
242. Alert Readiness
Alerts have:
owner
severity
runbook
243. Hard rule.
244. Diagnostic Readiness
Diagnostics must not require exposing private content.
245. Hard rule.
246. Rollback Readiness
Every GA capability defines rollback/fallback.
247. Hard rule.
248. Forward-Only Migration
If unavoidable, stronger backup/recovery qualification.
249. Hard rule.
250. Failure Budget
Preview/Beta may tolerate more defects than GA, but not hard security/privacy violations.
251. Hard rule.
252. Known Limitation Registry
#![allow(unused)] fn main() { pub struct CapabilityKnownLimitation { pub capability: CapabilityId, pub statement: LimitationStatement, pub severity: LimitationSeverity, } }
253. Limitation Severity
#![allow(unused)] fn main() { pub enum LimitationSeverity { Minor, Moderate, Significant, BlockingForGa, } }
254. BlockingForGa Prevents GA
Hard rule.
255. Limitation Disclosure
User/admin docs must expose material limitations.
256. Hard rule.
257. Feature Maturity UI
UI may show:
Experimental
Beta
Preview
where relevant.
258. No deceptive "stable" label.
259. Hard rule.
260. Product Readiness Review
#![allow(unused)] fn main() { pub struct ProductReadinessReview { pub capability: CapabilityId, pub target: CapabilityMaturity, pub readiness: CapabilityReadiness, pub blocking_risks: Vec<EngineeringRiskId>, pub exceptions: Vec<ProductReadinessExceptionId>, } }
261. Hard rule.
262. Readiness Decision
#![allow(unused)] fn main() { pub enum ProductReadinessDecision { Advance, AdvanceWithConditions, Hold, Regress, } }
263. Hard rule.
264. No Automatic Advancement Based On Time
Hard rule.
265. No Automatic Advancement Based On Adoption
Hard rule.
266. Readiness Review Authority
Scoped.
267. Hard rule.
268. Product Readiness API
#![allow(unused)] fn main() { pub trait ProductReadinessService { fn readiness( &self, capability: CapabilityId, ) -> Result<CapabilityReadiness, ProductReadinessError>; fn review( &self, capability: CapabilityId, target: CapabilityMaturity, ) -> Result<ProductReadinessReview, ProductReadinessError>; } }
269. Maturity Transition Service
#![allow(unused)] fn main() { pub trait CapabilityMaturityService { fn transition( &self, request: MaturityTransitionRequest, ) -> Result<CapabilityReadinessBaselineId, ProductReadinessError>; } }
270. Qualification Service
#![allow(unused)] fn main() { pub trait CapabilityQualificationService { fn qualify( &self, capability: CapabilityId, release: ReleaseId, ) -> Result<CapabilityQualification, ProductReadinessError>; } }
271. No People-Analytics API
Hard rule.
272. Error Taxonomy
#![allow(unused)] fn main() { pub enum ProductReadinessError { CapabilityUnknown, InvalidMaturityTransition, RequiredReadinessMissing, BlockingRiskOpen, DependencyNotReady, EvidenceStale, ExceptionNotAllowed, ExceptionExpired, CompatibilityInsufficient, RecoveryNotReady, SupportNotReady, ScopeViolation, Unauthorized, Internal, } }
273. Observability
Safe metrics:
capabilities by maturity
readiness dimensions
blocking risks
stale qualification evidence
GA candidate count
274. Forbidden:
feature engagement by sensitive segment
developer readiness score
product owner approval leaderboard
275. Hard rule.
276. Product Readiness SLOs
Examples:
GA capability has fresh qualification
GA capability has production support owner
GA capability has rollback/recovery evidence
277. Security SLO
0 GA capability with unresolved hard security blocker
0 GA transition using expired exception
278. Privacy SLO
0 readiness decision based on covert user profiling
0 hidden telemetry added only to justify launch
279. Failure Modes
marketing-driven maturity inflation
GA without operational readiness
dependency below required maturity
preview feature becomes permanent preview
280. Maturity Inflation
Prevent via mandatory evidence.
281. Hard rule.
282. GA Without Operations
Hold transition.
283. Hard rule.
284. Dependency Immaturity
Block or scope launch.
285. Hard rule.
286. Permanent Preview
Require periodic review/retire/advance.
287. Hard rule.
288. Preview Expiry
#![allow(unused)] fn main() { pub struct PreviewExpiryPolicy { pub max_duration: Duration, pub review_required: bool, } }
289. Hard rule.
290. Capability Review Cadence
#![allow(unused)] fn main() { pub enum CapabilityReviewCadence { Monthly, Quarterly, SemiAnnual, EventDriven, } }
291. Hard rule.
292. Trigger Events
major incident
security finding
privacy change
dependency regression
major architecture change
293. Hard rule.
294. Readiness Regression
Must be allowed.
295. Hard rule.
296. Release Freeze
A regressed capability may block release or be disabled.
297. Hard rule.
298. Testing
Need product-readiness testkit.
299. Test Scenarios
new experimental capability
beta feature with privacy gap
GA candidate with blocking risk
mature capability with security regression
deprecated capability retirement
300. Transition Test
Experimental→GA rejected.
301. Evidence Test
Ready state without evidence rejected.
302. Dependency Test
Capability cannot reach GA if required dependency below minimum maturity.
303. Risk Test
Critical unaccepted risk blocks GA.
304. Exception Test
Hard launch criterion cannot be waived.
305. Exposure Test
Experimental capability cannot become DefaultOn.
306. Platform Test
Android-ready does not imply desktop-ready.
307. Anonymous Mode Test
Standard privacy readiness does not imply anonymous-mode readiness.
308. Recovery Test
GA transition fails without recovery/rollback evidence.
309. Staleness Test
Major architecture change invalidates readiness evidence.
310. Regression Test
Critical security issue can regress/suspend GA capability.
311. Retirement Test
Capability cannot retire with unresolved data migration.
312. Privacy Test
No individual-user profiling required for readiness.
313. Fuzzing
Fuzz:
maturity transitions
readiness matrices
launch criteria
exceptions
dependency graphs
314. Property Tests
Properties:
capability can never reach GA with unresolved mandatory readiness dimension
hard launch criterion can never be waived
exposure can never exceed maturity policy
capability can never retire while required data-migration obligations remain open
315. Formal Verification Targets
Strong candidates:
maturity state machine
dependency readiness
launch exception rules
suspension/regression
316. Kani Candidate
maturity/exception/dependency invariants.
317. TLA+ Candidate
experimental → alpha → beta → preview → GA → regression/deprecation.
318. Loom Candidate
concurrent readiness update + risk opening + GA decision.
319. Performance
Readiness governance is control-plane work.
320. Release gate reads indexed readiness baseline.
321. Hard rule.
322. Storage
Separate:
capabilities
maturity transitions
readiness evidence
qualification records
launch criteria
exceptions
dependency readiness
known limitations
323. No user/developer analytics warehouse.
324. Hard rule.
325. Partitioning
By:
capability
service
platform
maturity
readiness dimension
326. No person/user partition.
327. Hard rule.
328. Crate Layout
Recommended:
crates/
├── siar-product-readiness-core/
├── siar-capability-registry/
├── siar-maturity-policy/
├── siar-readiness-evidence/
├── siar-capability-qualification/
├── siar-ga-governance/
├── siar-capability-dependencies/
├── siar-readiness-exceptions/
├── siar-product-readiness-observability/
└── siar-product-readiness-testkit/
329. siar-product-readiness-core
Owns:
CapabilityId
CapabilityMaturity
ReadinessState
ProductReadinessError
330. siar-capability-registry
Capability scope/owner/maturity/variants.
331. siar-maturity-policy
Allowed transitions/exposure constraints.
332. siar-readiness-evidence
Multidimensional evidence/freshness.
333. siar-capability-qualification
Capability qualification per release.
334. siar-ga-governance
GA criteria/decision authorities.
335. siar-capability-dependencies
Dependency maturity/compatibility.
336. siar-readiness-exceptions
Time-bounded waivable criteria.
337. siar-product-readiness-observability
Aggregate readiness health only.
338. siar-product-readiness-testkit
maturity/dependency/GA/privacy tests.
339. Security, Privacy & Correctness Invariants
Mandatory:
1. Capability maturity is an evidence-backed technical/support state and cannot be advanced because of marketing pressure, elapsed time, usage volume, or adoption targets alone.
2. Product readiness is multidimensional across functional, security, privacy, reliability, performance, operability, supportability, compatibility, recovery, and documentation dimensions; no single readiness score may hide a blocking dimension.
3. General Availability requires fresh evidence for every mandatory readiness dimension, a qualified release, production support ownership, documented limitations, and verified rollback/recovery behavior.
4. Hard security/privacy/reliability launch criteria are non-waivable and cannot be bypassed by product-readiness exceptions or launch urgency.
5. Capability exposure is constrained by maturity; Experimental/Alpha capabilities cannot silently become default-on production features beyond policy.
6. Capability dependency readiness is explicit, and a feature cannot advance beyond the maturity/support level its required dependencies can safely sustain.
7. Readiness evidence becomes stale when requirements, architecture, threat model, dependencies, migration behavior, or implementation materially change; stale evidence cannot qualify a maturity transition.
8. GA capabilities may regress, suspend, restrict exposure, rollback, or deprecate when evidence no longer supports prior readiness; maturity is not an irreversible marketing label.
9. Product telemetry used for readiness is technical and privacy-safe—errors, latency, resource use, crashes—and cannot depend on private content, social graphs, sensitive personal inference, or covert behavioral profiling.
10. Capability qualification, exceptions, maturity transitions, and GA decisions are archived and historically reconstructable per release without becoming developer, product-owner, or user scoring systems.
11. Platform-specific, offline, anonymous-mode, enterprise, and federation variants are qualified independently where their trust/failure behavior differs; readiness in one mode cannot be inherited blindly by another.
12. Product-readiness governance integrates with requirements, assurance, architecture, knowledge traceability, risk/PIR, release readiness, SLOs, resilience, capacity, performance, hardware/facility readiness, deployment/update control, and assurance archives without creating an alternate launch-authority or surveillance path.
340. Initial Production Scope
Implement first:
typed CapabilityId/CapabilityMaturity
capability registry
multidimensional readiness states
qualification profiles
maturity transition rules
alpha/beta/preview/GA criteria
capability dependency readiness
exposure policy
launch criteria
known limitation registry
operational/security/privacy/reliability readiness reviews
rollback/migration readiness
release qualification binding
risk/exception checks
readiness freshness/invalidation
GA suspension/regression/deprecation
historical readiness baselines
assurance-archive integration
privacy-safe readiness dashboards
product-readiness testkit
Then add:
cross-platform readiness matrix
automated evidence aggregation
capability graph visualization
preview expiry automation
readiness impact propagation from architecture/risk changes
formal maturity-state verification
portable product qualification packages
341. Definition of Done
Part 127 is complete when:
- capabilities have stable identities and explicit maturity;
- readiness is multidimensional;
- evidence backs every Ready state;
- maturity transitions are governed;
- hard launch criteria cannot be waived;
- dependency maturity is enforced;
- exposure cannot exceed maturity policy;
- GA requires support/recovery/compatibility/documentation readiness;
- stale evidence blocks transition;
- maturity can regress/suspend;
- known limitations are visible;
- release/readiness baselines are historically reconstructable;
- no adoption/user/developer profiling drives readiness;
- maturity/GA/privacy/fuzz/formal tests are specified.
342. Final Architecture
CAPABILITY
│
▼
MATURITY STATE
│
┌────────────┼────────────┐
│ │ │
SECURITY PRIVACY RELIABILITY
│ │ │
├────────────┼────────────┤
│ │ │
PERFORMANCE OPERABILITY SUPPORT
│ │ │
└────────────┼────────────┘
▼
QUALIFICATION
│
▼
GA DECISION
│
▼
SUPPORT / MONITOR / EVOLVE
Product-readiness safety model:
typed maturity
+
multidimensional readiness
+
evidence freshness
+
dependency qualification
+
controlled exposure
+
rollback/recovery readiness
+
GA governance
+
historical qualification
not:
call a feature GA because it has users, hide limitations, waive security/privacy gaps, and use engagement telemetry as proof of readiness
343. Final Principle
A product capability is ready when the system can support its promises, failures, upgrades, recovery, and limitations—not merely when the code appears complete.
The correct model is:
define maturity honestly
+
qualify every readiness dimension
+
validate dependencies
+
limit exposure by maturity
+
prove rollback/recovery
+
advance only with fresh evidence
+
allow regression when evidence changes
+
archive decisions
+
never use product readiness as a reason to profile users or rank engineers
This architecture gives SIAR a privacy-preserving product-readiness foundation for capability maturity, alpha/beta/preview/GA progression, launch qualification, dependency readiness, support/operations readiness, exposure control, maturity regression, and historical product qualification while preserving the anonymity, local-first, least-authority, engineering-assurance, assurance-archive, and anti-surveillance guarantees established across Parts 34–126.