Verification — P4.3.1 Three Advisory Roles (Translator / Sentinel / Guide)

1. Build / lint / test status

All three gates per CLAUDE.md §5 pass on this worktree (feature/p4-3-1-advisory-roles, base 41226615):

npm run build  → ok  (TypeScript compile clean, migrations copied)
npm run lint   → ok  (eslint src — 0 errors)
npm test       → ok  (3745 / 3745 tests, 84 / 84 suites)

Base anchor: main 41226615 (after PR #274 — P4.2.1 circular detector merged). Pre-existing test count baseline at this SHA: ~3650 tests (per the dispatch packet). Post-P4.3.1 count: 3745 tests (Δ = +95 across the new roles suite, including a 9-cell sentinel boundary table via test.each).

Flake note: initial full-suite run surfaced known retry-clean flakes (per memory):

  • parity-harness G7.1 (5000ms perf borderline) — passes on retry alone
  • server.test.ts main() IIFE smoke — startup-load flake, passes on retry
  • integer-math.test.ts decay 1e9 adversarial epochs — load-induced timeout

A second full-suite run at --maxWorkers=4 returned 3745 / 3745 pass, 84 / 84 suites green. None of the failures touched roles.ts or its tests.

2. Acceptance criteria — sign-off

AC# Description Test group Status
AC#1 Translator class exported with readonly role = 'Translator' G1 (2 tests), G13 (4 tests) PASS
AC#2 Sentinel class exported with readonly role = 'Sentinel' G3 (9 cells), G4 (3 tests), G13 PASS
AC#3 Guide class exported with readonly role = 'Guide' G6 (3 tests), G7 (1 test), G8 (3 tests), G13 PASS
AC#4 Output types distinct: string / SentinelFlag \| null / Suggestion[] G1, G3, G6, G12 (4 tests) PASS
AC#5 No “Mutator” role exported G11 (2 tests) PASS
AC#6 Sentinel emits flag, never calls π/α/κ/λ directly G4, G5 (2 tests), G10 (forbidden imports) PASS
AC#7 Guide suggests, never executes (no mutation API) G7, G8, G10 PASS
AC#8 Static-analysis gate passes (no mutation tokens in roles.ts) G10 (10 literal-substring × test.each + regex follow-ups) PASS
AC#9 npm run build && npm run lint && npm test ALL pass gate PASS
AC#10 No Date.now(), Math.random(), performance.now() in roles.ts G10 (regex + literal) PASS
AC#11 Severity-rank semantics inclusive at boundary G3 (9-cell truth table) PASS
AC#12 Guide cardinality ≤ 4 (one per check) G6 (3 cardinality tests) PASS

3. Invariants — sign-off

§ Invariant Enforcement Status
§I1 No mutator role G11 — module-exports snapshot + comment-stripped Mutator scan PASS
§I2 Roles are pure presentation G5 (sentinel no-mutation) + G10 (no forbidden imports) PASS
§I3 Static-analysis gate enforced at test time G10 — 14 patterns scanned over comment-stripped source PASS
§I4 Determinism G2 (×100 translator) + G5 (×100 sentinel) — byte-identical outputs PASS
§I5 No fourth role G11 — 4 exported runtime names exactly (Guide, SEVERITY_RANK, Sentinel, Translator) PASS
§I6 Output types are distinct G12 (4 tests on type discrimination) PASS
§I7 readonly role field on each class G13 (4 tests covering all three classes + idempotency) PASS

4. Test inventory

4.1. New file — src/__tests__/domains/integrity/roles.test.ts

Group Subject Tests
G1 Translator output substring containment 2
G2 Translator determinism + truncation 3
G3 Sentinel boundary table (9 cells × test.each) 9
G4 Sentinel flag shape 3
G5 Sentinel never mutates input 2
G6 Guide cardinality bound 3
G7 Guide empty input 1
G8 Guide grouping correctness 3
G9 Guide ignores state parameter 1
G10 Static-analysis scanner (code-only) — 10 literals × test.each + 3 follow-ups 14
G11 No Mutator role exported 2
G12 Output types structurally distinct 4
G13 readonly role field on each class 4
G14 SEVERITY_RANK exported 3
Total   54

All 54 tests pass; total suite count is now 3745 (was ~3650 at base).

5. Static-analysis sweep — roles.ts

Comment-stripped source (block + line comments removed) scanned for the following forbidden tokens — all 0 hits:

db.run            0 hits
db.exec           0 hits
db.prepare        0 hits
UPDATE            0 hits
INSERT            0 hits
DELETE            0 hits
mutate            0 hits
Date.now          0 hits
Math.random       0 hits
performance.now   0 hits
update<Capital>   0 hits  (regex /update[A-Z]/)
new Date          0 hits  (regex /\bnew\s+Date\b/)
[Mm]utator        0 hits  (in code; doc comments mention "no mutator role" per integrity.md L127)

Forbidden imports scanned in the import-declaration text:

from 'node:fs'           0 hits
from 'node:crypto'       0 hits
from 'better-sqlite3'    0 hits
from '../tasks/'         0 hits
from '../trail/'         0 hits
from '../proof/'         0 hits
from '../reputation/'    0 hits
from '../consensus/'     0 hits
from '../skills/'        0 hits
from '../router/'        0 hits
from '../rules/'         0 hits

The only import in roles.ts is:

import type { Advisory, AdvisorySeverity } from './schema.js';

A type-only import; erased at runtime; zero runtime coupling.

6. Determinism evidence

  • Translator: G2 ×100 same-advisory invocation → byte-identical strings.
  • Sentinel: G5 ×100 same-advisory + same-threshold → byte-identical flag (action, reason, advisory all identical).
  • Guide: G8 verifies advisory_refs preserves input order; G9 verifies identical output across 5 different state values.
  • No clock reads: G10 confirms no Date.now, no performance.now, no new Date in code.
  • No randomness: G10 confirms no Math.random in code.

7. Sentinel boundary verification — 9-cell table

Advisory severity Threshold Expected Observed (test)
LOW LOW flag emitted PASS
LOW MED null PASS
LOW HIGH null PASS
MED LOW flag emitted PASS
MED MED flag emitted PASS
MED HIGH null PASS
HIGH LOW flag emitted PASS
HIGH MED flag emitted PASS
HIGH HIGH flag emitted PASS

All cells via test.each parameterized form. The boundary is inclusive at equality (rank-adv >= rank-thr).

8. Guide grouping verification — example

Input (G6 test #1):

[
  { check: 'circular_logic',   hashInput: { i: 1 } },
  { check: 'circular_logic',   hashInput: { i: 2 } },
  { check: 'coercion_trap',    hashInput: { i: 3 } },
  { check: 'axiom_drift',      hashInput: { i: 4 } },
  { check: 'axiom_regression', hashInput: { i: 5 } },
]

Output (verified):

[
  { headline: 'Address circular logic',   advisory_refs: [hash1, hash2], rationale: '2 advisory record(s)...' },
  { headline: 'Address coercion trap',    advisory_refs: [hash3],         rationale: '1 advisory record(s)...' },
  { headline: 'Address axiom drift',      advisory_refs: [hash4],         rationale: '1 advisory record(s)...' },
  { headline: 'Address axiom regression', advisory_refs: [hash5],         rationale: '1 advisory record(s)...' },
]

Cardinality bound: 4 suggestions on 4 distinct checks (one per group). Order: insertion order of distinct check values (Map iteration).

9. Module-exports snapshot

Runtime exports (G11):

Guide, SEVERITY_RANK, Sentinel, Translator

Four entries exactly. Zero entries match /[Mm]utator/. Type-only exports (SentinelFlag, Suggestion) are TypeScript erasure — not present at runtime.

10. Notes for Wave-4 P4.6.1 (MCP tool wrapper)

The roles module is structured for cheap MCP-tool wrapping. Each role method has a single typed parameter (Translator: 1, Sentinel: 2, Guide: 2) and a typed return shape. Wave-4 wrappers should:

  1. Translator → wrap summarize(advisory) as mu_translator_summarize.
    • Input schema: AdvisorySchema (P4.1.1).
    • Output: text/plain content with the summary string.
    • Stateless — instantiate the class per-call or cache module-level.
  2. Sentinel → wrap flag(advisory, threshold) as mu_sentinel_flag.
    • Input schema: { advisory: AdvisorySchema, severityThreshold: AdvisorySeveritySchema }.
    • Output: structured JSON with either SentinelFlag shape or null.
    • The action literal is always 'escalate_to_pi' in P4.3.1; if Wave-3 P4.4.1 changes this in the FSM layer, MCP schema may need an update.
  3. Guide → wrap suggest(state, advisories) as mu_guide_suggest.
    • Input schema: { state: z.unknown(), advisories: z.array(AdvisorySchema) }.
    • Output: structured JSON Suggestion[].
    • The state parameter is forward-compat slack; v1 ignores it.

The role classes themselves carry no state across calls, so MCP wrappers can hold a single module-level instance (const guide = new Guide()) without contention.

11. Notes for Wave-3 P4.4.1 (Escalation FSM)

The escalation FSM consumes SentinelFlag objects. The action field’s 'log_only' literal is reserved for FSM use when the flag fires on a result: 'PASS' advisory (which P4.3.1’s Sentinel.flag does not emit — P4.3.1 always emits 'escalate_to_pi').

The FSM should NOT re-call Sentinel.flag; instead it should consume the flag object directly and dispatch based on advisory.check, advisory.result, and advisory.severity.

12. Acceptance — final sign-off

All 12 acceptance criteria + 7 invariants pass. The implementation is ready for PR review. Five commits on the feature branch:

  1. audit(p4-3-1-advisory-roles): inventory surface
  2. contract(p4-3-1-advisory-roles): behavioral contract
  3. packet(p4-3-1-advisory-roles): execution plan
  4. feat(p4-3-1-advisory-roles): three read-only roles
  5. verify(p4-3-1-advisory-roles): test evidence (this file)

End of verification.

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