AILang/docs/plans/0094-design-md-rolesplit.tidy.md

# design-md-rolesplit.tidy — Implementation Plan (audit drift fix)

> **Parent spec:** `docs/specs/0045-design-md-rolesplit.md`
> **Scope authority:** `docs/journals/2026-05-19-audit-design-md-rolesplit.md`
> "Resolution" (committed 2ba5e16) — the architect `[medium]`+`[low]`
> drift fix, 5 orchestrator-decided points.
>
> **For agentic workers:** REQUIRED SUB-SKILL: use `skills/implement`
> to run this plan. Steps use `- [ ]` checkboxes for tracking.

**Goal:** Close the spirit-vs-letter gap: extract the
faithfully-migrated history/decision-record prose out of the 3
affected contract files into the decision-record journal, fix the
one stale cross-ref, re-scope the honesty sweeps to
`design/contracts/` only, and widen `design_index_pin.rs` clause-3
so the in-code hard gate provably subsumes `architect_sweeps.sh`
Sweep-1 over the contracts scope.

**Architecture:** TDD by gate-first ordering — Task 1 widens
clause-3 and verifies it goes RED against the *current* (un-stripped)
contract files (proving the widened gate catches what the 6 literal
markers missed); Tasks 2–5 strip the history prose (sentence-level
per recon's contract-residue map) → clause-3 returns GREEN; Task 6
re-scopes the sweep + its lockstep doc; Task 7 is the whole-tree
gate. Build stays green throughout (only one test file's body +
Markdown change; the test compiles, fails at runtime until the strip
lands). The widened clause-3 is a hand-rolled provable superset of
Sweep-1 (no `regex` dep).

**Tech Stack:** Markdown (`design/contracts/*.md`,
`docs/journals/2026-05-19-design-decision-records.md`), one Rust
test (`crates/ailang-core/tests/design_index_pin.rs`),
`bench/architect_sweeps.sh`, `skills/audit/agents/ailang-architect.md`.

**Pinned-byte hazard (recon Cross-references — honor in every strip
task):** each history strip runs adjacent to a `docs_honesty_pin.rs`
verbatim substring pin. `norm()` collapses whitespace but the pinned
run must stay a contiguous token-run:
- `str-abi.md:19` `type-installed; codegen is reserved and not yet shipped` ← `docs_honesty_pin.rs:121-122`
- `typeclasses.md:317` `` `io/print_str` is the only built-in direct-output effect-op `` ← `docs_honesty_pin.rs:125-126`
- `scope-boundaries.md:9` `` `Diverge` is a reserved effect name with no op and no codegen `` ← `docs_honesty_pin.rs:112-113` (over-strip guard — NOT in any edit span; do not touch)

---

## Task 1: widen `design_index_pin.rs` clause-3 (gate-first, RED)

**Files:**
- Modify: `crates/ailang-core/tests/design_index_pin.rs:130-157` (`fn contracts_carry_no_decision_record_prose`)

- [ ] **Step 1: Replace the clause-3 body with the widened, provable-superset matcher**

Replace `fn contracts_carry_no_decision_record_prose` (current
:130-157, the 6-literal-marker `markers` array + `body.contains(m)`
loop) with this. The other 3 clauses + helpers (`root` :10-12,
`read` :14-17, `norm` :19-21, `index_tables` :23-62,
`link_target_exists` :67-81, `design_md_is_gone` :83-90,
`every_index_link_resolves` :92-107,
`every_contract_names_a_resolvable_ratifying_test` :109-128) are
**untouched**.

```rust
#[test]
fn contracts_carry_no_decision_record_prose() {
    // clause 3 — the conflation tripwire, widened (design-md-rolesplit.tidy,
    // audit Resolution-4) to a FAITHFUL SUPERSET of
    // bench/architect_sweeps.sh Sweep-1's history-anchor regex over the
    // design/contracts/ scope, PLUS the audit-named decision-record
    // phrases (the deliberate widening that closes the case-variance
    // dodge the 6 literal markers left open).
    //
    // Invariant: clause-3 GREEN ⟹ Sweep-1 finds nothing in design/contracts/.
    //
    // Sweep-1 = 'Iter [0-9]+[a-z]?(\.[0-9]+)?|Family [0-9]+
    //           |^[^/]*2026-[0-9]{2}-[0-9]{2}|\*\*Status: |pre-[0-9]+[a-z]?
    //           |[0-9]+[a-z]? sketch|21\.g'
    // Faithfulness, per Sweep-1 alternative:
    //   - Iter / Family / pre- / <n> sketch / 21.g / **Status:
    //       → sweep1_line_anchor() reproduces each verbatim,
    //         case-SENSITIVE (grep -E, no -i) — exactly Sweep-1 here,
    //         never narrower.
    //   - ^[^/]*2026-NN-NN  → date_anchor() reproduces Sweep-1's
    //         ^[^/]* PATH-EXCLUSION (only the line prefix before the
    //         first '/' is scanned) and generalises 2026→20NN
    //         (⊇ Sweep-1, never narrower). A `docs/specs/2026-..`
    //         citation has '/' before the date ⇒ NOT flagged — faithful
    //         to Sweep-1, no over-fire on legit present-tense spec
    //         cross-refs (the iter-.1 plan defect this repairs).
    //   - PHRASES: literal decision-record idioms (case-insensitive) —
    //         the deliberate widening that closes the capital-variance
    //         dodge ("An earlier draft" vs "an earlier draft").
    //
    // A blanket case-insensitive iter/milestone detector was evaluated
    // and REJECTED (audit Resolution-4 corrected): it conflates the
    // memory-model rule-names "Iter A"/"Iter B", and ordinary words
    // "pre-existing"/"pre-set"/"pre-Boehm"/"pre-tail-call", with
    // provenance stamps — unworkable. faithful-Sweep-1 (the capital-I,
    // digit-anchored form) already excludes those by construction and
    // is confirmed ZERO across every contract file; lowercase
    // `(iter <code>)` provenance is removed by the strip tasks, not by
    // a fragile hard-gate regex. The load-bearing invariant
    // (clause-3 GREEN ⟹ Sweep-1 clean in contracts/) holds with
    // sweep1_line_anchor + date_anchor + PHRASES alone.
    let dir = root().join("design/contracts");

    const PHRASES: &[&str] = &[
        "we rejected", "an earlier draft", "earlier draft committed",
        "why not other", "was retired", "were retired", "rollback plan",
        "previously all", "deliberately deferred", "new-baseline decision",
        "amends the above", "out of scope per",
        "the journal records when", "unchanged from the original draft",
    ];

    // Sweep-1's non-date alternatives, hand-rolled verbatim, case-SENSITIVE
    // (grep -E without -i), on the raw physical line.
    fn sweep1_line_anchor(line: &str) -> Option<&'static str> {
        let kw_digit = |kw: &str| -> bool {
            let mut from = 0;
            while let Some(i) = line[from..].find(kw) {
                let p = from + i + kw.len();
                if line[p..].chars().next().map_or(false, |c| c.is_ascii_digit()) {
                    return true;
                }
                from = p;
            }
            false
        };
        if kw_digit("Iter ") { return Some("Iter <n>"); }
        if kw_digit("Family ") { return Some("Family <n>"); }
        if kw_digit("pre-") { return Some("pre-<n>"); }
        if line.contains("**Status: ") { return Some("**Status:"); }
        if line.contains("21.g") { return Some("21.g"); }
        if let Some(s) = line.find(" sketch") {
            let pre = line[..s].as_bytes();
            if pre.last().map_or(false, u8::is_ascii_alphanumeric)
                && pre.iter().rev()
                      .take_while(|c| c.is_ascii_alphanumeric())
                      .any(u8::is_ascii_digit)
            {
                return Some("<n> sketch");
            }
        }
        None
    }

    // Sweep-1's `^[^/]*2026-NN-NN`, generalised to 20NN-NN-NN,
    // PATH-EXCLUDED: scan only the line prefix BEFORE the first '/'.
    fn date_anchor(line: &str) -> Option<String> {
        let prefix = line.split('/').next().unwrap_or(line).as_bytes();
        for w in prefix.windows(10) {
            if w[0] == b'2' && w[1] == b'0'
                && w[2].is_ascii_digit() && w[3].is_ascii_digit()
                && w[4] == b'-' && w[5].is_ascii_digit() && w[6].is_ascii_digit()
                && w[7] == b'-' && w[8].is_ascii_digit() && w[9].is_ascii_digit()
            {
                return Some(String::from_utf8_lossy(w).into_owned());
            }
        }
        None
    }

    for entry in fs::read_dir(&dir).expect("design/contracts/ exists") {
        let p = entry.unwrap().path();
        if p.extension().and_then(|e| e.to_str()) != Some("md") {
            continue;
        }
        let raw = fs::read_to_string(&p).unwrap();
        let fname = p.file_name().unwrap().to_string_lossy().into_owned();
        let low = norm(&raw).to_lowercase();
        for ph in PHRASES {
            assert!(
                !low.contains(ph),
                "clause-3: history phrase {ph:?} in contract {fname:?}"
            );
        }
        for line in raw.lines() {
            if let Some(a) = sweep1_line_anchor(line) {
                panic!("clause-3: Sweep-1 anchor {a:?} in contract {fname:?}: {line:?}");
            }
            if let Some(d) = date_anchor(line) {
                panic!("clause-3: history date {d:?} in contract {fname:?}: {line:?}");
            }
        }
    }
}
```

- [ ] **Step 2: Verify clause-3 is now RED against the un-stripped tree**

Run: `cargo test -p ailang-core --test design_index_pin contracts_carry_no_decision_record_prose 2>&1 | tail -8`
Expected: **FAIL** — fires on still-present history prose: a PHRASES
hit (e.g. `clause-3: history phrase "deliberately deferred" in
contract "str-abi.md"`) and/or the path-excluded date
(`clause-3: history date "2026-05-13" in contract "str-abi.md"`).
This is the required RED: the widened gate catches what the 6
literal case-sensitive markers missed (the capital-variance dodge).

- [ ] **Step 3: Verify the other 3 clauses + build still GREEN**

Run: `cargo test -p ailang-core --test design_index_pin 2>&1 | grep -E '^test (design_md_is_gone|every_index_link_resolves|every_contract_names) '`
Expected: those 3 still `ok` (only clause-3 RED). `cargo build -p ailang-core --tests 2>&1 | tail -1` → `Finished` (the new matcher compiles; no new dependency).

---

## Task 2: strip history prose from `design/contracts/0013-typeclasses.md`

**Files:**
- Modify: `design/contracts/0013-typeclasses.md` (:77-78, :182-186, :197-200, :279-289, :291-300, :302-317 — recon's complete scan)
- Modify: `docs/journals/2026-05-19-design-decision-records.md` (append at EOF, after :431)

- [ ] **Step 1: Append the migrated typeclasses history to the decision-record journal**

Append at EOF of `docs/journals/2026-05-19-design-decision-records.md`:

```markdown

## Migrated from design/contracts/ at design-md-rolesplit.tidy (2026-05-19)

History/decision-record prose extracted from contract files by the
post-audit tidy (the `###`-whole relocation in iter .1 dragged these
into contracts; they are relitigation-guard content, not contract).

### typeclasses.md — Prelude-classes evolution

An earlier draft committed to a fixed Prelude (Show/Eq/Ord on the
primitives), but the implementation work to wire `int_to_str` as a
heap-allocated-string runtime primitive proved substantively
separable from the typeclass machinery itself, and the LLM-utility
case for primitive `Show` is weak (LLM-natural form is `int_to_str
x`, not `show x`). Milestone 23 added `Ordering`/`Eq`/`Ord` +
primitive instances + the five helpers; operator routing through
`Eq`/`Ord` and `print`-rewire were held out for bench-rebaseline /
post-mq-dispatcher reasons; `Show` shipped in milestone 24 (iters
24.2/24.3). `MethodNameCollision` was retired at iter mq.3
(cross-class method sharing became structurally legal). The
dedicated `KindMismatch` diagnostic was retired at iter ctt.3
(`BareCrossModuleTypeRef` subsumes it).
```

- [ ] **Step 2: Rewrite the 6 typeclasses.md spans present-tense (recon's contract-residue map)**

Apply each, keeping every present-tense contract fact, dropping the
history clause:

- `:77-78` `Three invariants make this work, all installed in milestone 24's iter 24.3 and worth keeping load-bearing:` → `Three invariants make this work:`
- `:182-186` drop the parenthetical `(`MethodNameCollision` was retired at iter mq.3. …)` opening; keep the present-tense replacement sentence: `Cross-class method sharing is structurally legal; ambiguity surfaces at the call site via `AmbiguousMethodResolution` or, for class-fn name overlap, via the `class-method-shadowed-by-fn` warning. See §"Method dispatch" below.`
- `:197-200` keep `… is rejected earlier by the canonical-form validator as `BareCrossModuleTypeRef` — `f` is a bare, non-primitive name not declared as a `TypeDef` in the owning module.`; drop `so the dedicated `KindMismatch` diagnostic was retired at iter ctt.3.`
- `:279-289` (the "Milestone 22 ships no built-in Prelude classes / An earlier draft committed to…" paragraph) — delete wholesale (pure decision-record; the present-tense state is the m24 prelude below).
- `:291-300` replace the `Milestone 23 amends the above:` paragraph with present-tense: `The prelude ships the `Ordering` ADT, the `Eq` and `Ord` classes, primitive `Eq Int/Bool/Str` and `Ord Int/Bool/Str` instances, and the five polymorphic free-fn helpers `ne`/`lt`/`le`/`gt`/`ge`. Float has neither `Eq` nor `Ord` instance per §"Float semantics"; a polymorphic helper invoked at Float fires `NoInstance` at typecheck with a Float-aware diagnostic cross-referencing this section.` (drop "remain out of scope per their original substantive reasons (bench rebaseline, milestone-24 dependency…); Show itself ships in milestone 24" — that relitigation is now in the journal.)
- `:302-317` replace the `Milestone 24 amends the above further:` opening with present-tense: `The prelude ships `class Show a where show : (a borrow) -> Str` and primitive `Show Int`, `Show Bool`, `Show Str`, `Show Float` instances. Float **is** included in Show (unlike Eq/Ord) …` — **keep verbatim and byte-contiguous** the tail through `:317` `` `io/print_str` is the only built-in direct-output effect-op `` (pinned by `docs_honesty_pin.rs:125-126`) and the `:315` `print_mono_body_shape.rs` cross-reference; drop only `Milestone 24 amends the above further`, `(iter 24.2)`, `shipped in iter 24.3` (→ replace `shipped in iter 24.3 with body` with `with body`).

- [ ] **Step 3: Verify typeclasses.md pin + clause-3 progress**

Run: `cargo test -p ailang-core --test docs_honesty_pin 2>&1 | grep -E 'test result:'`
Expected: PASS (the `io/print_str…` pinned run intact). Run
`grep -n 'io/print_str` is the only built-in direct-output effect-op' design/contracts/0013-typeclasses.md`
Expected: exactly one contiguous match (pin survived).

---

## Task 3: strip history prose from `design/contracts/0011-str-abi.md`

**Files:**
- Modify: `design/contracts/0011-str-abi.md` (:14, :16, :18, :20, :22-23, :74, :38-43, :45-47)
- Modify: `docs/journals/2026-05-19-design-decision-records.md` (append under the tidy section)

- [ ] **Step 1: Append str-abi history to the journal**

Append under the `## Migrated …` section:

```markdown

### str-abi.md — heap-Str builtin provenance + deferred-operator rationale

Builtin iter provenance: `int_to_str`/`bool_to_str`/`float_to_str`/
`str_clone` shipped iter 24.1; `str_concat` shipped iter str-concat
(2026-05-13); the non-escape static-Str lowering pass landed iter
18b, move-tracking partial-drop iter 18d.3. Operator routing through
classes is deliberately deferred — it would migrate every fixture
and re-baseline the bench corpus (a new-baseline decision, not an
iter detail). `Num` is not in milestone 22: class-based numeric
overloading would invoke literal-defaulting which axis-7 excluded.
```

- [ ] **Step 2: Strip the `(iter …)` parentheticals + deferred rationale**

- `:14` `- `int_to_str : (borrow Int) -> Str` (iter 24.1) — decimal rendering` → `- `int_to_str : (borrow Int) -> Str` — decimal rendering`
- `:16` `- `bool_to_str : (borrow Bool) -> Str` (iter 24.1) — `"true"`/`"false"`.` → drop ` (iter 24.1)`
- `:18` `- `float_to_str : (borrow Float) -> Str` (iter 24.1) —` → drop ` (iter 24.1)`. **Hazard:** `:19` `type-installed; codegen is reserved and not yet shipped.` is pinned (`docs_honesty_pin.rs:121-122`) — keep `:19` byte-identical and contiguous with `:18`'s `—`.
- `:20` `- `str_clone : (borrow Str) -> Str` (iter 24.1) — allocates a fresh` → drop ` (iter 24.1)`
- `:22-23` `- `str_concat : (borrow Str, borrow Str) -> Str` (iter str-concat,\n  2026-05-13) — combines …` → `- `str_concat : (borrow Str, borrow Str) -> Str` — combines two `Str` values into a single owned `Str`.` (collapse the soft-wrap; drop the whole `(iter str-concat, 2026-05-13)` — this is the Sweep-1 exit-1 trip)
- `:74` drop ` (iter 18b)` and ` (iter 18d.3)`; keep the present-tense mechanism sentence.
- `:38-43` keep `` `==`, `<`, `<=`, `>`, `>=` REMAIN primitive operators. Class methods are accessed by name (`eq x y`, `lt x y`, …), not via these operators. `` ; drop `(unchanged from the original draft)` and the whole `Routing operators through classes is deliberately deferred — … new-baseline decision rather than an iter detail.`
- `:45-47` keep `Arithmetic operators (`+`, `-`, `*`, `/`) stay primitive and per-type.`; drop `` `Num` is NOT in milestone 22. `` and `Class-based numeric overloading would invoke literal-defaulting which axis-7 already excluded.`

- [ ] **Step 3: Verify str-abi pin intact**

Run: `grep -n 'type-installed; codegen is reserved and not yet shipped' design/contracts/0011-str-abi.md`
Expected: exactly one contiguous match. Run
`cargo test -p ailang-core --test docs_honesty_pin 2>&1 | grep 'test result:'` → PASS.

---

## Task 4: strip history prose from `design/contracts/0010-scope-boundaries.md`

**Files:**
- Modify: `design/contracts/0010-scope-boundaries.md` (:5-6, :14-17, :36-38)
- Modify: `docs/journals/2026-05-19-design-decision-records.md` (append under the tidy section)

- [ ] **Step 1: Append scope-boundaries history to the journal**

```markdown

### scope-boundaries.md — retired ops + deferral rationale

Polymorphic-fn-as-value is deferred because it would need one
closure-pair global per instantiation. The per-type print ops
`io/print_int`/`io/print_bool`/`io/print_float` were retired in iter
rpe.1 (the polymorphic `print` is the canonical non-Str output path).
```

- [ ] **Step 2: Rewrite the 3 scope-boundaries spans**

- `:5-6` keep `Snapshot of the current boundary.`; delete `Items move out of this list as iterations land; the JOURNAL records when.` (process-meta, not a scope contract; not decision-record either — plain delete, not journal-moved).
- `:14-17` keep `Polymorphic fns must be **directly called** at the use site. Passing a polymorphic fn as a value (`let f = id in f(42)`) is not yet supported.`; drop ` — it would need one closure-pair global per instantiation, deferred.` (rationale → journal, Step 1).
- `:36-38` keep `Effects on function signatures, with `do op(args)` for direct effect ops (`io/print_str`). The polymorphic `print` (§"Polymorphic print") is the canonical output path for non-Str values.`; drop `The per-type print ops `io/print_int`, `io/print_bool`, `io/print_float` were retired in iter rpe.1;` (→ journal).

- [ ] **Step 3: Over-strip guard — the Diverge pin must be untouched**

Run: `grep -n 'Diverge` is a reserved effect name with no op and no codegen' design/contracts/0010-scope-boundaries.md`
Expected: exactly one match at the original location (`:9`,
unedited — it is NOT in any edit span; this guards against
collateral deletion). `cargo test -p ailang-core --test effect_doc_honesty_pin 2>&1 | grep 'test result:'` → PASS.

---

## Task 5: fix the stale cross-ref in `design/contracts/0005-float-semantics.md`

**Files:**
- Modify: `design/contracts/0005-float-semantics.md:100`

- [ ] **Step 1: Repoint the stale "below" direction**

`:99-100` verbatim `Both allocate a fresh heap-Str slab at the call
site (see "Str ABI" below for the dual realisation) and carry
`ret_mode: Own`…`. Replace `(see "Str ABI" below for the dual
realisation)` → `(see design/contracts/0011-str-abi.md for the dual
realisation)`. (`design/contracts/0011-str-abi.md` exists — confirmed
recon; INDEX row `design/INDEX.md:93`.)

- [ ] **Step 2: Verify float-semantics pin intact + no stale "below"**

Run: `grep -n '"Str ABI" below' design/contracts/0005-float-semantics.md || echo "CLEAN: stale below gone"`
Expected: `CLEAN: stale below gone`. Run
`cargo test -p ail --test eq_float_noinstance 2>&1 | grep 'test result:'` → PASS.

---

## Task 5b: residual lowercase provenance stamps (exhaustive-scan additions)

> The audit's `[medium]` finding was a 3-file spot-check. The
> planning-time exhaustive scan found two more contract files
> carrying lowercase `iter <code>` provenance the audit missed
> (audit Resolution corrected in the same iter). These are spirit
> cleanup — faithful-Sweep-1/clause-3 do NOT trip on them (lowercase,
> no digit-anchored capital `Iter`), so they are not gate-blocking,
> but a contract carrying "iter form-a.1" is exactly the residue this
> milestone exists to remove. Strip + journal-note for completeness.

**Files:**
- Modify: `design/contracts/0009-roundtrip-invariant.md:73`
- Modify: `design/contracts/0002-data-model.md:149,161`
- Modify: `docs/journals/2026-05-19-design-decision-records.md` (append under the tidy section)

- [ ] **Step 1: Append the provenance to the journal**

```markdown

### roundtrip-invariant.md / data-model.md — corpus + loop-recur provenance

The Form-A round-trip corpus was flipped from `.ail.json` to `.ail`
at iter form-a.1. The `loop`/`recur` schema entries were added at
loop-recur iter 1 (strictly additive; pre-existing fixtures hash
bit-identically). Provenance only — the present-tense schema/contract
is the entry shapes themselves.
```

- [ ] **Step 2: Strip the stamps, keep the present-tense contract**

- `roundtrip-invariant.md:73` `… in at least one `.ail` fixture (corpus flipped from `.ail.json` to `.ail` at iter form-a.1). New AST` → drop the parenthetical: `… in at least one `.ail` fixture. New AST` (the invariant is "every variant appears in ≥1 `.ail` fixture"; the flip provenance is journal-class).
- `data-model.md:149` `// loop-recur iter 1: strict iteration block. `binders` declares` → `// loop: strict iteration block. `binders` declares` (drop `-recur iter 1:` → the schema-comment names the construct, not the iter).
- `data-model.md:161` `// loop-recur iter 1: re-enter the lexically innermost enclosing` → `// recur: re-enter the lexically innermost enclosing` (this entry is the `recur` schema — name it `recur`, drop the iter stamp).
- Leave `data-model.md:154` `pre-existing fixtures hash bit-identically` untouched — "pre-existing" is an ordinary present-tense word, NOT provenance (faithful-Sweep-1's `pre-[0-9]` does not match it; confirmed).

- [ ] **Step 3: Verify no lowercase `iter <code>` provenance remains in contracts**

Run: `grep -rnoE 'iter [a-z0-9][-a-z0-9.]*[0-9]' design/contracts/ | grep -ivE 'iteration|iterat' || echo "CLEAN: no iter-code provenance"`
Expected: `CLEAN: no iter-code provenance` (the `(iter 24.1)` /
`iter str-concat` / `iter form-a.1` / `loop-recur iter 1` stamps all
removed by Tasks 3 + 5b; `iteration`-word usages excluded). Run
`cargo test -p ailang-core --test design_schema_drift 2>&1 | grep 'test result:'`
then `cargo test -p ailang-surface --test round_trip 2>&1 | grep 'test result:'`
Expected: both PASS — `design_schema_drift` anchors on the JSON
`"t": "loop"` / `"t": "recur"` schema tokens (untouched; only the
prose comment changed), and the round-trip corpus is
content-unchanged.

---

## Task 6: re-scope `architect_sweeps.sh` honesty sweeps + lockstep doc

**Files:**
- Modify: `bench/architect_sweeps.sh:25` (+ header `:5-7`)
- Modify: `skills/audit/agents/ailang-architect.md:77-84`

- [ ] **Step 1: Narrow `DESIGN_GLOB` to `design/contracts`**

`bench/architect_sweeps.sh:25` verbatim
`DESIGN_GLOB="design/contracts design/models"` →
`DESIGN_GLOB="design/contracts"`. (Substantive reason, encoded as a
comment on the same line: `# contracts only — design/models is the
narrative tier; "as of milestone N" context is legitimate there`.)
Header `:5-7` prose `design/ prose set (design/contracts +
design/models)` → `design/contracts (the honesty-bound contract
surface; design/models is the narrative tier, out of honesty-sweep
scope)`. The 5 `run_sweep` regexes (`:46-59`) are **unchanged**; the
exit-code block (`:61-64`) is **unchanged**.

- [ ] **Step 2: Lockstep `ailang-architect.md`**

In `skills/audit/agents/ailang-architect.md` the `:77-84`
history-anchor-regrowth bullet: append one sentence after the
exit-semantics lines: `Sweeps 1–4 scan `design/contracts/` only —
`design/models/` is the narrative tier (§ reading-list: "context,
not a drift surface"), so a milestone-context phrase there is not a
regrowth.` (`:34` already states models/ is not a drift surface;
this makes the sweep scope explicit and consistent.) No other
edit; Sweep count stays 5 so `docs_honesty_pin.rs:10` `//!` needs no
change.

- [ ] **Step 3: Verify the sweep now scans contracts only**

Run: `bash bench/architect_sweeps.sh; echo "exit=$?"`
Expected: at this point Tasks 2–5b have stripped the contract
history, so **`exit=0`** and `All five sweeps clean.` (If exit 1
with a `design/contracts/...` match, a history span was missed —
fix it; if the match is `design/models/...` the glob narrowing
didn't apply — re-check `:25`.)

---

## Task 7: whole-tree GREEN gate (milestone-close proof)

**Files:** none (verification only).

- [ ] **Step 1: clause-3 now GREEN, design_index_pin 4/4**

Run: `cargo test -p ailang-core --test design_index_pin 2>&1 | grep -E '^test |test result:'`
Expected: all 4 `ok` — `contracts_carry_no_decision_record_prose`
flipped RED→GREEN (history stripped), the other 3 unchanged-GREEN.

- [ ] **Step 2: the retargeted pins + E2Es still GREEN**

Run: `cargo test -p ailang-core --test design_schema_drift --test docs_honesty_pin --test effect_doc_honesty_pin 2>&1 | grep 'test result:'`
Expected: 3× PASS. Run
`cargo test -p ail --test eq_float_noinstance --test show_no_instance_e2e 2>&1 | grep 'test result:'`
Expected: 2× PASS.

- [ ] **Step 3: whole workspace GREEN + sweep exit 0 + acceptance grep**

Run: `cargo test --workspace 2>&1 | grep -oE '[0-9]+ passed; [0-9]+ failed' | awk -F'[ ;]' '{p+=$1; f+=$4} END {print "TOTAL passed="p" failed="f}'`
Expected: `failed=0` and `passed` ≥ 646 (the iter .1 baseline; the
widened clause-3 adds no new test count, it replaces a body).
Run: `bash bench/architect_sweeps.sh; echo "exit=$?"`
Expected: `exit=0`.
Run: `grep -rIn 'DESIGN\.md' . --exclude-dir=.git --exclude-dir=target | grep -vE '(^\./)?(docs/(journals/|specs/|plans/|roadmap\.md|WhatsNew\.md|journal-archive\.md)|bench/orchestrator-stats/)' | grep -v 'design-md-rolesplit' | grep -v 'design_index_pin.rs' || echo "CLEAN"`
Expected: `CLEAN` (no live-ref regression from the tidy edits).

---

## Self-review (planner Step 5)

1. **Spec/Resolution coverage:** Task 1 = Resolution-4 (clause-3 =
   faithful-Sweep-1 + path-excluded-date + PHRASES; the
   case-insensitive-iter-detector mechanism was found unworkable and
   is corrected in the audit Resolution + this plan — it conflated
   the "Iter A/B" rule-names and "pre-existing"/"pre-set" with
   provenance); Tasks 2–4 = Resolution-1 (history → journal, the 3
   audit-named files); Task 5 = Resolution-2 (stale "below"); Task
   5b = Resolution-1 scope correction (the planning-time exhaustive
   scan found 2 more contract files with lowercase provenance the
   audit's 3-file spot-check missed); Task 6 = Resolution-3 (sweep
   re-scope + lockstep); Task 7 = Resolution-5 exit state. All
   points covered, scope corrected on evidence. ✓
2. **Placeholder scan:** no TBD/TODO/"similar to". Every strip names
   the exact recon line + verbatim before→after text. ✓
3. **Type/path consistency:** `design/contracts/0011-str-abi.md`,
   `docs/journals/2026-05-19-design-decision-records.md`,
   `contracts_carry_no_decision_record_prose` used identically
   across tasks; the journal append section header
   `## Migrated … (2026-05-19)` consistent Tasks 2/3/4. ✓
4. **Step granularity:** each step is one file's edit-set or one
   Run; the largest (Task 2 Step 2, 6 spans) is one
   mechanical-per-span pass, 2–5 min. ✓
5. **No commit steps:** none. ✓
6. **Pin/replacement contiguity:** the three `docs_honesty_pin.rs`
   pinned runs (`str-abi.md:19`, `typeclasses.md:317`,
   `scope-boundaries.md:9`) are called out as hazards in the header
   AND verified by an explicit `grep -n` contiguity check in Tasks
   2/3/4 Step 3 + the over-strip guard in Task 4 Step 3. The
   widened clause-3 matcher (Task 1) is a single self-contained
   function body — no cross-task substring split. ✓
7. **Compile-gate vs deferred-caller:** the only Rust edit is one
   self-contained test fn body (Task 1); it compiles standalone
   (no signature change, no caller, no new dependency — hand-rolled
   matcher). Every Run gate is satisfiable at its task: Task 1 Step
   2 expects RED (pre-strip), Task 7 expects GREEN (post-strip);
   no gate depends on a later task's code. Build green throughout
   (test compiles; only its runtime assertion is RED until the
   strip lands). ✓
8. **Verification filter strings resolve:** `-p ailang-core --test
   design_index_pin` / `design_schema_drift` / `docs_honesty_pin` /
   `effect_doc_honesty_pin`, `-p ail --test eq_float_noinstance` /
   `show_no_instance_e2e`, and `-p ailang-surface --test round_trip`
   (Task 5b — corrected to its real crate `ailang-surface`, not
   `ail`) all exist (iter .1 created/retargeted them). The clause-3
   filter `contracts_carry_no_decision_record_prose` is the exact fn
   name. Task 7 Step 3 uses the **unfiltered** `cargo test
   --workspace` with a numeric `failed=0` + `passed≥646` assertion
   (cannot masquerade as "nothing ran"). The `grep`/`bash
   architect_sweeps` gates have explicit `CLEAN`/`exit=0` sentinels;
   Task 5b Step 3's `grep … || echo "CLEAN…"` likewise. ✓

Plan is placeholder-free; clause-3 is a hand-rolled **faithful**
Sweep-1 superset — faithful-Sweep-1 line anchors (case-sensitive,
digit-anchored — confirmed ZERO across all contracts) + Sweep-1's
path-excluded date + the audit-named decision-record phrases; **no
`regex` dep, no blanket iter detector** (the rejected mechanism).
The audit Resolution-4 is corrected in lockstep. Hand off to
`implement`.