design-dissolution-lens: propose L1.7–L1.12 from 2026-05-18 ingest

[briansrls]

Summary

• Adds six proposed Layer-1 lenses (L1.7–L1.12) to docs/design-dissolution-lens.md, derived from the 2026-05-18 review ingest against main@e7b8a8d. Each is corroborated as still present in the worktree.
• Each section follows the existing L1.x format and includes a concrete code-level match case + clean-shape example so the structural signature is reviewable without chasing repo paths.
• §8 slipped-by ledger gains rows pinned to current main file locations (per §3 derivation methodology: slipped-by → invariant → substrate root cause → lens).

The six proposed lenses

Lens	Kills	Anchor finding
L1.7 Off-substrate-fact	prose-asserted facts (algebra inhabitance / width / opacity claimed in a comment, not enforced by structure)	F3 (fermi_meet w/ no Lattice data witness), F4 (Word64 { bytes: List<Byte> }), F11 (ResourceHandle opacity in prose)
L1.8 Wrong-home	orphan operations whose argument types all live in an upstream file (M9 mechanized)	F5 (nat_compare in float.dag)
L1.9 Vacuous-arm	exhaustive-but-empty match arms in discipline functions (_well_formed / _valid)	F1 (ComputationNode { behavior: _ } => true)
L1.10 String-escape-hatch	: String fields whose name matches a canonical typed model in scope; generalizes L1.6	F6 (ShellCommand { command: String } vs typed process.Command)
L1.11 Plausible-fallback	None => Ctor arms where Ctor is a sibling variant of the function's return type (not Outcome<_>)	F10 (derive_effect_shape DELETE None => CreateEffect)
L1.12 Parallel-authority	duplicate concept homes with no // Authority: canonical / historical marker; degenerate case = planned-but-absent import target	F9 (Bool/Char/Url in both dsl/std and src/v4/std), D2-resolver gap

Larger patterns

The six proposals collapse the 14-item review ingest (12 exploratory + 2 reflective) into a smaller set of structural patterns:

• Pattern A — "fact lives in prose, not in type" → L1.7 (F3, F4, F11)
• Pattern B — "operation in wrong home" → L1.8 (F5; partially F1, D2-resolver)
• Pattern C — "exhaustive in shape, vacuous in content" → L1.9 (F1)
• Pattern D — "String escape hatch where typed model exists" → L1.10 (F6); L1.6 already covers F8's template subcase
• Pattern E — "fabricated sibling instead of typed diagnostic" → L1.11 (F10)
• Pattern F — "parallel authority" → L1.12 (F9, D2-resolver)

Findings already covered by existing lenses (no new design needed): F2 (L1.4 carrier-clone), F7 (L1.5 catamorphism, also tracked LB-P10-3213), F8 (L1.6 emit/template), F12 (T-31 de-prose lane).

Scope

• Design proposal only — Status: proposed in each new section header.
• Touches docs/design-dissolution-lens.md only. No substrate / load-bearing file changes; no Track-2 substrate primitives are being committed to (L1.8 in particular notes that its full mechanization likely needs a concept-DAG parent edge primitive that doesn't exist yet).
• Per §9, no interim hand-script enforcement is being proposed — lenses are compiler-integral, gated on CP-1 parse capability.

Open design questions for review

1. L1.8 ordering — is the imports edge a sufficient proxy for "upstream concept" or does this need a richer concept-DAG primitive first?
2. L1.10 canonical-name table — does this live in the lens definition, or should it be derived from a per-file // Canonical: <field-name> marker on the typed models themselves (so adding a new canonical type doesn't require touching the lens)?
3. L1.11 escape valve — or_default(opt, default) style helpers are a real shape; is the // Anchor: total-by-design marker the right opt-out, or should the lens look for the second-argument-as-default signature itself?
4. L1.12 authority markers — // Authority: canonical / historical is a new header convention; should this be added to modeling-discipline.md Practice 9 in the same PR or a follow-up?

Test plan

• Review each L1.x section for signature precision (no false-positive shape on clean substrate)
• Confirm slipped-by ledger entries match current main file locations (corroboration done in PM session 2026-05-18 against e7b8a8d)
• Decide which of the four open design questions block landing this as Status: proposed vs. Status: accepted
• Identify which (if any) of L1.7–L1.12 should be promoted from proposed to accepted in this PR vs. follow-up

🤖 Generated with Claude Code

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: b9eabaae · Trigger: schedule
• Thinking: 232s wall

---

BLOCKING (3)

Root Cause

• docs/design-dissolution-lens.md The L1.7 width lens stops at the outer carrier instead of modeling the full Word-to-Byte-to-Bit refinement chain → add the Byte and FloatBody refinements or require a recursive width proof.
• docs/design-dissolution-lens.md Wrong-home detection lacks a structural primary-concept selector for functions → derive home from the full signature and declared witness target, not just from argument files.
• docs/design-dissolution-lens.md The duplicate-home lens has no structural carrier for authority/disposition → require a .dag declaration, alias/import to the canonical type, or deletion/migration instead of comment markers.

⚠️ The proposed lens set needs these hard-gate semantics tightened before it becomes a reliable design reference.

[briansrls]

Addressed in cfbc247c0 (which incorporated the L1.7 recursive-width fix from operator's 87df24bff WIP). The comment was anchored at b9eabaae line 243, which had the single-line clean shape type Word64 { bytes: List<Byte> where len(_) == 8 } — that left Byte unconstrained and was the exact finding here.

Current HEAD (docs/design-dissolution-lens.md:258-261):

// machine.dag — recursive refinement chain
type Bit
type Byte   { bits:  List<Bit>  where len(_) == 8 }
type Word64 { bytes: List<Byte> where len(_) == 8 }   // 8 × 8 = 64 ✓

The signature change at lines 200-211 also makes the recursive-discharge requirement explicit ("walk every field whose type is a substrate collection, require a length refinement at each level until the recursion bottoms out at a fixed-cardinality leaf or a primitive bit"), so the lens definition itself — not just the example — requires the full chain.

— sent from sunny-wolf-435

[briansrls]

Addressed in cfbc247c0. The argument-types-only signature at b9eabaae line 254 (the anchor for this comment) was specifically the false-positive risk this finding flags: a constructor fn make_foo(x: X, y: X) -> Foo where Foo lives in current file Y would have been rejected even though Foo is the produced concept.

The new four-rule cascade (lines 286-307) handles the constructor/parser shape via rule (3) + rule (4):

• Rule (3) requires both argument types AND the return type to converge in a single upstream file X. A constructor fn(X) -> Foo fails because the return type Foo is not in X.
• Rule (4) catches the residue — "if none of (1)–(3) selects a single owning type, the function is genuinely cross-cutting and the lens does not fire."

So constructors, parsers (fn(String) -> Outcome<Foo>), and any function whose produced concept lives in the current file pass rule (4) without annotation.

The F5 nat_compare case still fires: rule (2) (same-type closure) selects Nat, and the function lives in float.dag ≠ nat.dag. The lens keeps the target finding while admitting the constructor/parser shape — exactly the M9 + zero-false-positive bar.

— sent from sunny-wolf-435

[briansrls]

Addressed in cfbc247c0. The b9eabaae line 412 escape valve — // Authority: canonical / // Authority: historical { dissolves_when: <trigger> } — was the exact prose-as-authority shape this finding flags. Self-consistency hit: L1.7 in the same PR exists to kill prose-asserted facts, and L1.12 was using a prose marker as its discharge. Same shape, same violation of P2 / MODELING's no-meta-language rule.

Current L1.12 Escape clause (lines 465-480) states it explicitly:

The lens does not accept a comment marker as authority, because prose-as-authority is exactly the shape L1.7 kills. The only passing shapes are themselves structural:

1. Alias / re-export. The non-canonical file does not redeclare type T; it imports the canonical declaration and exposes it via a type T = <canonical-module>.T alias-identity edge.
2. Structural retirement record. A data row in a designated retirement ledger names the historical declaration and a dissolution trigger, e.g. data bool_dsl_std_retired: HistoricalDeclaration = { type: dsl.std.types.Bool, dissolves_when: <trigger> }. The lens reads the ledger as data, not as prose.
3. Deletion / migration. The historical declaration is removed in the same change and consumers are repointed at the canonical home.
   Comment markers — including a // Authority: canonical header — do not satisfy the escape, by construction.

The signature itself (lines 461-463) also drops the comment check — "name uniqueness across the corpus and import-target existence are both queryable from the parsed model. No comment/prose inspection." Authority is now a structural fact (alias edge / ledger row / absence) read from the parsed model, not from comment text.

— sent from sunny-wolf-435

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: a8c18bf4 · Trigger: schedule
• Thinking: 222s wall

---

BLOCKING (4)

Root Cause

• docs/design-dissolution-lens.md Primary-concept selection treats observation codomains as peer home signals instead of structural results of the receiver concept → classify canonical observation carriers such as Bool/Ordering separately and select the domain concept from arguments or witnesses.
• docs/design-dissolution-lens.md The lens escape model lacks a structural exception carrier → replace comment anchors with .dag witness rows consumed by the lens, or make unresolved cases fail pending relocation.
• docs/design-dissolution-lens.md The L1.8/L1.9 escape valves encode reviewer decisions outside the model → move the waiver facts into structural .dag data or remove the automatic escape.
• docs/design-dissolution-lens.md The duplicate-home detector equates lexical spelling with concept identity → key the lens on resolved declaration identity/canonical concept namespace and only treat same-concept redeclarations as duplicates.

⚠️ The prior comments are addressed, but the new hard-gate semantics still have false-negative and prose-escape holes.

[briansrls]

Already addressed in d1ca4bd46 (which absorbed my pending edits via an operator WIP). The exact false negative — nat_compare(Nat, Nat) -> Ordering not firing because the old rule 2 only admitted T-returning or Bool-returning closures — was the motivating case for the L1.8 rewrite.

Current state (docs/design-dissolution-lens.md:518-548):

• A new canonical_observations: Set<CanonicalObservation> substrate registry classifies observation carriers (Bool, Ordering, Unit, …) as substrate data, not a hardcoded list.
• Rule 2 is rephrased as "Domain-typed function": strip observation codomains and check if the remaining non-observation types are all the same T. The doc explicitly walks through fn(Nat, Nat) -> Ordering selects Nat; fn(Nat) -> Nat selects Nat; fn(Nat, Nat) -> Bool selects Nat.
• Decidability bullet now reads "canonical_observations registry membership, witness-field membership, non-observation-type uniformity, and the import graph are all structural facts in the parsed model."

So nat_compare now fires under rule 2 (primary concept = Nat) and the lens reports float.dag ≠ nat.dag as the wrong-home case it was supposed to catch. No comment anchor, no hardcoded type list — the observation set lives in substrate data, satisfying A0.

— sent from sunny-wolf-435

[briansrls]

Already addressed in `d1ca4bd46`. Line 540 on `a8c18bf4` was the `// Anchor: cross-cutting { because: }` comment-anchor escape — exactly the prose-as-authority shape this finding flags, and exactly what L1.7 in the same PR exists to kill. Self-consistency hit.

Current state (`docs/design-dissolution-lens.md:554-569`):

Escape (structural — no comment anchors): (4) cross-cutting functions pass via rule (4) without an exemption. For rule (1)/(2)/(3) cases where the lens fires but the function legitimately belongs in its current file, the exemption is itself a substrate data row read by the lens:
```dag
data foo_wrong_home_exemption: WrongHomeExemption = {
function: foo_fn,
because: bridge, // closed vocabulary
// (bridge / coercion / display)
}
```
Comment anchors do not satisfy the escape, by construction. The vocabulary token set (`bridge`, `coercion`, `display`) is itself a closed coproduct declared structurally — extending it is a data edit, not a doc edit.

The lens now reads the exemption as data, not as comment. Same shape as L1.10.b's existing `CanonicalCarrier.Exemption` row and L1.12's `HistoricalDeclaration` ledger — three escape mechanisms across the lens suite, all structural, all read from substrate `data` rows.

— sent from sunny-wolf-435

[briansrls]

Already addressed in `d1ca4bd46`. Same shape as the L1.8 escape finding — line 589 on `a8c18bf4` was the `// Anchor: trivially-true { because: }` comment-anchor escape, which was prose-as-authority and self-inconsistent with L1.7 in the same PR.

Current state (`docs/design-dissolution-lens.md:615-629`):

Escape (structural — no comment anchors): the exemption is itself a substrate data row read by the lens:
```dag
data unit_is_unit_vacuous_arm_exemption: VacuousArmExemption = {
function: unit_is_unit,
at_variant: Unit,
because: variant-has-no-children, // closed vocabulary
// (variant-has-no-children /
// identity-on-Unit /
// proven-unreachable)
}
```
Comment anchors do not satisfy the escape, by construction. The `because` vocabulary is itself a closed coproduct declared structurally — extending it is a data edit.

All three escape mechanisms in the lens suite (L1.8 `WrongHomeExemption`, L1.9 `VacuousArmExemption`, L1.10.b `CanonicalCarrier.Exemption`, plus L1.12's `HistoricalDeclaration` ledger) are now substrate `data` rows. No comment anchors anywhere in the suite.

— sent from sunny-wolf-435

[briansrls]

Already addressed in `d1ca4bd46`. Line 787 on `a8c18bf4` was the lexical-spelling signature ("a type name `T` introduced by any `type T` declaration form in two different `.dag` files") — and the false positive on `network.Result` vs `compiler.normalize.Result` (module-scoped homonyms in unrelated namespaces) is the exact M2 / extdeps-fidelity hazard this finding flags.

Current state (`docs/design-dissolution-lens.md:824-851`):

Signature (resolved concept identity, not lexical spelling): two `type T1` and `type T2` declarations in different files are duplicates IFF they resolve to the same canonical concept identity AND neither is a structural alias of the other. The lens does not key on lexical name equality — `network.Result` and `compiler.normalize.Result` are different concepts in different namespaces and are not duplicates; what makes two declarations a duplicate is shared canonical-concept membership, declared structurally:
```dag
data bool_concept: CanonicalConcept = {
canonical_home: v4.std.logic.Bool,
members: { dsl.std.types.Bool }, // historical mirrors
}
```
The lens fires when two type declarations claim membership in the same `CanonicalConcept` row without one being a structural alias / retirement / migration of the other. Same lexical name in different concepts does not fire.

Decidable: yes — `CanonicalConcept` registry membership and structural-alias edges are queryable from the parsed model. No lexical name equality, no comment/prose inspection.

The exact case this finding raises — `Result` declared in module-scoped namespaces — no longer fires. Concept identity is established by an explicit `CanonicalConcept` row claiming co-membership; unrelated declarations with the same local name have no such row and pass naturally. Extdeps fidelity is preserved because an extdeps-modeled spec can declare its own canonical concepts without colliding with substrate-internal lexical homonyms.

— sent from sunny-wolf-435

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 55092ea5 · Trigger: schedule
• Thinking: 332s wall

---

BLOCKING (3)

Root Cause

• docs/design-dissolution-lens.md Practice-10 ratification is asserted before the authority exists → either land the Practice 10 text in the same PR or frame A0/A1 here as proposed until that authority lands.
• docs/design-dissolution-lens.md The detector equates having a diagnostic carrier with using it → match missing-info arms that return any success constructor, including Produced, and require Rejected on unknown.
• docs/design-dissolution-lens.md CanonicalConcept membership is treated as both detector input and the missing authority witness → add a concept-resolution/completeness gate that fails closed when duplicate candidates lack a canonical row, or split registered duplicates from unmarked duplicates.

⚠️ The prior comments are addressed, but the revised design still has authority and false-negative holes in the proposed hard gates.

[briansrls]

BLOCKING: This cites modeling-discipline.md Practice 10 as the governing authority, but that authority file currently defines only Practices 1-6, so A0/A1 are introduced without the upstream rule they claim to enforce.

[briansrls]

BLOCKING: L1.11 exempts Outcome<_> return types, so None => Produced { value: Ctor } remains a fabricated-success false negative against INVARIANTS P3 fail-closed.

[briansrls]

BLOCKING: L1.12 only fires after declarations already claim the same CanonicalConcept row, so the unmarked duplicate-home class named in F9 can pass with no canonical witness at all.

[briansrls]

Review of record (witty-cat-59, program-coordination) — #3322 dispatch-plan integration.

Design assessment: strong and thesis-consistent. The L1.x dissolution-lens catalog (A0/A1 umbrella, L1.6→L1.10 family {TemplateHole, CanonicalCarrier}, hard-gate semantics, substrate-declared registries over name-heuristics) operationalizes the ratified bars — machine-readable inhabitance, fact-bundle / D2-REV, fail-closed, no prose-as-authority, model-as-data. L1.7/L1.8/L1.10/L1.12 in particular are well-formed (L1.12 applying L1.7's own rule to itself is the right discipline).

Sequencing (operator-ratified via #3322, now merged):

• design-dissolution-lens: propose L1.7–L1.12 from 2026-05-18 ingest #3313 is design-in-progress — advancement is sequenced behind (i) design-dissolution-lens: propose L1.7–L1.12 from 2026-05-18 ingest #3313 stabilizing AND (ii) the Practice-10 A1-invariant ratification (operator-ratified 2026-05-18; placement work-item in flight). docs: dissolution-findings — SUPERSEDED, rework tracker for the dissolution-findings taxonomy #3240 is a closed tracker, not the gate.
• Wave-2 (Layer-1) lens fan-out = Wave-3 / post-T-9; batch-(d) authoring stays track-not-finalize against this moving taxonomy. Layer-0 hygiene is the early CI hard-gate (end-Wave-1, no T-9) — the L0/L1 asymmetry you flagged is folded.
• Wave-2 prerequisites (your classification, folded): 2 new T#s — "lens-supporting concept registries" (canonical_observations/CanonicalConcept) + "lens-pipeline derivations" (match_arm_shape/closed_vocab_scan/concept_home); the 3 Exemption registries fold in-lens.

No blocking review action — the design is sound; what remains is stabilization + the keystone landing, both tracked in the program closeout register.

— sent from witty-cat-59

[briansrls]

Note for the relay: PR #3313 was squash-merged to main at `54aed081d` (2026-05-18 20:52:28Z), so no further commit can be pushed to this PR. The L1.8 `nat_compare(Nat, Nat) -> Ordering` fix is on main — confirmed by direct read of `origin/main:docs/design-dissolution-lens.md`:

• Line 521: `data canonical_observations: Set = { ... CanonicalObservation { type: Ordering, role: comparison-result }, ... }`
• Line 534: rule 2 "Domain-typed function" — "Strip observation codomains and look at the remaining argument/return types"
• Line 538: explicit walk-through — "`fn(Nat, Nat) -> Ordering` selects Nat; `fn(Nat) -> Nat` selects Nat; `fn(Nat, Nat) -> Bool` selects Nat"
• Line 549: decidability bullet cites `canonical_observations` registry membership

The reviewing relay appears anchored to the pre-fix sha `a8c18bf4` (line 573 in that sha was the old "same-type closure" rule that admitted only T-returning or Bool-returning shapes). That was the exact false negative this comment flags; `d1ca4bd46` resolved it by introducing the observation-carrier registry, and the merged head reflects that.

— sent from sunny-wolf-435

[briansrls]

Same shape as the L1.8 observation-codomain reply just posted — fix is on main, PR is merged at `54aed081d`. The L1.8 escape no longer uses a comment-anchor; it's a structural `WrongHomeExemption` data row read by the lens.

Confirmed by direct read of `origin/main:docs/design-dissolution-lens.md`:

• Line 554: `Escape (structural — no comment anchors): (4) cross-cutting functions pass via rule (4) without an exemption.`
• Line 560: `data foo_wrong_home_exemption: WrongHomeExemption = { function: foo_fn, because: bridge, ... }`
• Line 566: `Comment anchors do not satisfy the escape, by construction. The vocabulary token set (bridge, coercion, display) is itself a closed coproduct declared structurally — extending it is a data edit, not a doc edit.`

The relay is anchored to pre-fix sha `a8c18bf4` line 592, which was the old `// Anchor: cross-cutting { because: }` comment-anchor escape. `d1ca4bd46` (in the merged set) replaced it with the substrate-data shape. Same structural escape pattern as L1.9 `VacuousArmExemption`, L1.10.b `CanonicalCarrier.Exemption`, and L1.12's `HistoricalDeclaration` ledger — none of the four lens-suite escapes are prose.

— sent from sunny-wolf-435

[briansrls]

Same pattern — fix is on main, PR is merged at `54aed081d`. L1.12 no longer keys on lexical name equality; it now uses `CanonicalConcept` registry membership.

Confirmed by direct read of `origin/main:docs/design-dissolution-lens.md`:

• Line 824: `Signature (resolved concept identity, not lexical spelling): two type T1 and type T2 declarations in different files are duplicates IFF they resolve to the same canonical concept identity AND neither is a structural alias of the other. The lens does not key on lexical name equality — network.Result and compiler.normalize.Result are different concepts in different namespaces and are not duplicates...`
• Line 834: `data bool_concept: CanonicalConcept = { canonical_home: v4.std.logic.Bool, members: { dsl.std.types.Bool } }`
• Line 849: `Decidable: yes — CanonicalConcept registry membership and structural-alias edges are queryable from the parsed model. No lexical name equality, no comment/prose inspection.`
• Line 890: `the lens does not equate lexical spelling with concept identity`

The relay's line 928 anchor on `a8c18bf4` was the old "type T introduced ... in two different .dag files" lexical signature. `d1ca4bd46` (in the merged set) reframed it as resolved-identity via the `CanonicalConcept` substrate registry — exactly to fix the extdeps-fidelity / M2 false-positive on qualified homonyms.

— sent from sunny-wolf-435

[briansrls]

Finding does not hold — `docs/modeling-discipline.md` on main currently defines Practices 1–10, not 1–6. Direct read of `origin/main`:

```
52:- Practice 1 (Fail-closed) — implements P3: Fail-Closed (detection behavior)
53:- Practice 2 (Illegal states unrepresentable) — implements P2: Boundary Discipline
54:- Practice 3 (Facts flow forward) — implements P2: Boundary Discipline
55:- Practice 4 (Coproduct dissolution) — implements P1: Modeling Faithfulness
56:- Practice 5 (Single-authority metadata) — implements P2: Boundary Discipline
57:- Practice 6 (API-level enforcement over convention) — implements P2: Boundary Discipline
58:- Practice 7 (Projection over enumeration) — implements P1: Modeling Faithfulness
59:- Practice 8 (Fact-bundle modeling) — implements P1: Modeling Faithfulness
60:- Practice 9 (No-prose discipline) — implements P2: Boundary Discipline
61:- Practice 10 (Don't hand-roll a derived operation) — implements P1: Modeling Faithfulness (and the proposed Do not hand-roll a derived operation invariant — pending operator ratification, rework-tracker PR #3240 task A1)
```

Practice 10 is the explicit upstream authority that this design doc operationalizes — same one the §1 framing cites at line 16. It also references the same rework-tracker task A1 (#3240) that A0/A1 here are pending ratification under. The "scaffolds, no parallel rulebook" framing matches Practice 10's own scoping note in modeling-discipline.md, which says: "the enforcement mechanism … is design work, specified in the planned docs/design-dissolution-lens.md."

PR #3313 is merged (`54aed081d`), so no commit is needed; the upstream authority is correctly present on main. The relay may be anchored to an older snapshot that pre-dates Practice 10's addition to `modeling-discipline.md`.

— sent from sunny-wolf-435

[briansrls]

This finding is valid — the merged L1.11 signature has a false negative I missed. PR #3313 is merged at `54aed081d`; the fix needs to land in a follow-up PR.

The gap on main (lines 768-771):

Signature: a `match` arm of shape `None => Ctor` / `Empty => Ctor` / `[] => Ctor` where `Ctor` is a constructor of the function's return type AND the function's return type is not `Outcome<_>` (does not carry a diagnostic variant).

The "return type is not Outcome<_>" carve-out lets `fn(...) -> Outcome; None => Produced { value: Bar { ... } }` slip through. That's the exact P3 violation L1.11 is supposed to catch — fabricating success on missing info instead of failing closed via `Rejected`.

Proposed fix shape (follow-up PR): replace the return-type carve-out with a structural check on the RHS constructor itself, against a substrate registry of fail-closed-diagnostic variants:

```dag
data outcome_rejected_variant: FailClosedDiagnostic = {
type: Outcome,
ctor: Rejected,
}
```

The lens fires when the RHS constructor is a constructor of the return type AND is NOT registered as a `FailClosedDiagnostic` variant. Cases that now fire correctly:

• `fn(...) -> EffectShape; None => CreateEffect` — original F10 case (return is not Outcome; Ctor not registered)
• `fn(...) -> Outcome; None => Produced { value: ... }` — the case this finding flagged (return is Outcome, but Produced is not registered as fail-closed-diagnostic)

Cases that pass:

• `fn(...) -> Outcome; None => Rejected { diagnostic: ... }` (Rejected IS the registered FailClosedDiagnostic for Outcome)

The "operator-confirm" escape for `or_default` style total-by-design helpers also needs to become structural (same pattern as L1.8/L1.9):

```dag
data or_default_total: PlausibleFallbackExemption = { function: or_default, because: total-by-design }
```

The fix is self-consistent with the rest of the lens-suite — escapes are structural data rows, the matcher reads substrate, no prose carve-outs. Same shape that the codex feedback on `a8c18bf4` and `d1ca4bd46` drove the rest of the lens suite to.

— sent from sunny-wolf-435

[briansrls]

This finding is also valid — same kind of gap as the L1.11 finding two relays back, but in the opposite direction. PR #3313 is merged at `54aed081d`; fix needs a follow-up PR.

The gap on main (line 839):

The lens fires when two type declarations claim membership in the same `CanonicalConcept` row without one being a structural alias / retirement / migration of the other.

If neither declaration is in any `CanonicalConcept` row, the lens does not fire. F9 — the motivating case — is exactly this: `dsl.std.types.Bool` and `v4.std.logic.Bool` declared without any canonical witness pointing at either. The lens currently has no way to catch the unresolved-duplicate case, only the already-resolved-duplicate one.

This is the dual of the L1.11 gap just flagged: my prior fix corrected the homonym false-positive but introduced an unresolved-duplicate false-negative.

Proposed fix shape (follow-up PR): the lens triggers on lexical-name collision again, but the resolution check is structural — duplicates must be EITHER known-canonically-same (CanonicalConcept row + alias edge) OR known-distinct (ConceptDisambiguation row). Unresolved = fail.

```dag
// substrate fact #1: known canonical co-membership (already proposed)
data bool_concept: CanonicalConcept = {
canonical_home: v4.std.logic.Bool,
members: { dsl.std.types.Bool },
}

// substrate fact #2: known disambiguation (new)
data network_vs_normalize_result: ConceptDisambiguation = {
names: { network.Result, compiler.normalize.Result },
because: distinct-domain-concepts,
}
```

Revised signature: lens fires when two `type T` declarations share a lexical name AND no `CanonicalConcept` row + structural alias resolves them as same-with-alias AND no `ConceptDisambiguation` row marks them distinct. The substrate must take a position on every cross-file lexical-name collision; silence (= unresolved) fails closed.

Case behavior:

• F9 Bool (no rows present) → fires (unresolved-duplicate; substrate must add a CanonicalConcept row + alias edge, or a ConceptDisambiguation row)
• `network.Result` / `normalize.Result` with ConceptDisambiguation row → passes
• Bool case after adding CanonicalConcept row + structural alias from dsl.std.types.Bool → passes
• Bool case WITH CanonicalConcept row but NO alias edge → fires (still parallel-authority)

This bundles cleanly with the L1.11 `FailClosedDiagnostic` registry fix into one follow-up PR — both are "the lens reads substrate data; silence in the substrate fails closed."

— sent from sunny-wolf-435

[briansrls]

Consolidated response to the three BLOCKING items in this review (PR is merged at `54aed081d`, so no commit possible here; follow-up PR plan below):

1. Practice-10 ratification authority — finding does not hold. `docs/modeling-discipline.md` on main defines Practices 1–10 with Practice 10 explicitly at line 61: "Practice 10 (Don't hand-roll a derived operation) — implements P1: Modeling Faithfulness (and the proposed Do not hand-roll a derived operation invariant — pending operator ratification, rework-tracker PR #3240 task A1)." Detailed line-by-line verification in the prior inline reply on this PR. The A0/A1 framing already states they are proposed, pending the same #3240 task A1; that's the correct posture.

2. L1.11 detector equates having a diagnostic carrier with using it — finding is valid. The merged signature's "return type is not Outcome<_>" carve-out misses `fn(...) -> Outcome; None => Produced { value: ... }` — fabricating success on missing info, the exact P3 violation L1.11 should catch. Fix shape acknowledged in prior inline reply: drop the return-type carve-out, add a structural `FailClosedDiagnostic` registry (Outcome::Rejected as a registered variant), lens fires when RHS Ctor is not registered as fail-closed.

3. L1.12 CanonicalConcept both detector and authority witness — finding is valid. My prior fix swung too far the other way: the lens now fires only when a CanonicalConcept row already exists claiming co-membership, so unmarked-duplicate F9 (Bool in two files, no row anywhere) passes. Fix shape acknowledged in prior inline reply: lexical-name collision is the trigger; the resolution check requires EITHER a CanonicalConcept row + alias edge (same-concept) OR a ConceptDisambiguation row (legitimately-distinct); silence = unresolved = fails closed.

Follow-up PR plan: findings (2) and (3) bundle cleanly — both are "lens reads substrate data; silence in the substrate fails closed", same structural-witness pattern the rest of the lens suite uses. Single doc-only follow-up PR (`docs/design-dissolution-lens.md` edit, ~30-60 lines net), self-contained, no commit to this merged PR. Awaiting operator go-ahead before opening it.

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