Decomposes intrinsic-bodies.2 (parent spec § Architecture points 6-8)
into 4 tasks + a final gate:
Task 1 — migrate the 13 authored prelude dummy bodies to (intrinsic):
7 Eq/Ord instance methods (inner (body false)/(body true)/
(body (term-ctor Ordering EQ)) → (intrinsic), Design X lambda-body
placement) + 6 float_* fns ((body false) → (intrinsic)). Gated by
round-trip + the 4 eq/compare/float E2E ratifiers staying green
(behaviour-preserving: the intercepts emit identical IR).
Task 2 — rebaseline the two moving hash pins: prelude_module_hash_pin
(prelude module hash) and mono_hash_stability's 6 eq/compare
def-hashes (capture-from-failure, replace the constant). The 4
show__* pins do NOT move.
Task 3 — replace the one-directional registry_contains_all_legacy_arms
pin with intercepts_bijection_with_intrinsic_markers: an in-source
test that walks prelude + kernel_stub pre-mono for Term::Intrinsic
markers, recovers mangled names (mono_symbol for instance methods,
fn name for top-level), and asserts the bijection over the
intrinsic-backed class (14) with the 5-name *__Int optimisation-only
allowlist. Both directions + a stale-allowlist guard.
Task 4 — confirm no codegen path lowers an intercepted body (already
true post-.1: intercept-by-name precedes lower_term), delete the
stale dummy-body comment at lib.rs:1310-1319, and conditionally edit
0007-honesty-rule.md ONLY if it names the dummies (recon: it does
not — a general rule; no forced edit).
Recon-driven plan decisions:
1. The bijection pin lives in intercepts.rs's in-source #[cfg(test)]
mod tests, NOT a crates/ail/tests integration test. Visibility
forces it: the pin needs INTERCEPTS (pub(crate) in codegen, in-source
only) AND the parse hops (ailang-surface dev-dep). Verified
ailang-surface does not dep ailang-codegen, so there is no
dev-dep cycle blocking the in-source test from calling parse_prelude
(the dev-dep-cycle hazard that bit pd.2.4/pd.3.1 does not apply
here — that was the ailang-core <-> ailang-surface edge).
2. The pin walks PRE-mono (parse_prelude/parse_kernel_stub) and
reconstructs mangled names via mono_symbol, rather than walking
post-mono. Post-mono only synthesises USED mono symbols, so a
post-mono walk would miss any instance method the pin's entry
fixture does not exercise (e.g. eq__Unit). Pre-mono + mono_symbol
sees all 14 markers unconditionally.
3. Task 2's hashes are capture-from-failure, not pre-computed — the new
prelude bytes determine them. The old->new values get recorded in
the iter commit body by the Boss.
All verification filter strings checked against the tree: the 4 E2E
ratifier fn names, the mono pin name, and the prelude pin target all
resolve to ≥1 real test. No ail/ail-json/ll fenced block in the plan
(the migrated-form snippets are scheme fragments — the (intrinsic) form
is already ratified by .1's kernel_intrinsic_smoke.ail), so the
parse-bytes gate is a documented no-op.
Handoff target: skills/implement on docs/plans/0107-intrinsic-bodies.2-migration-lock.md
Brummel
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