Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.
Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).
Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.
zig build test: 426/426; examples suite: 595/595.
Attempt-3 fix for the F2 review finding. After resolveBareCallee picks a
shadowed same-name author at a normal call site, the call's PARAMETER TARGET
TYPING still ran first-wins: resolveCallParamTypes' bare-identifier branch
resolved param types via resolveFuncByName(name) / fn_ast_map.get(name) — both
keyed by name, not by the resolved author. Because that runs in lowerCall
BEFORE the resolveBareCallee routing, a shadow author whose parameter TYPE
differs from the first-wins winner had its args lowered against the WINNER's
signature (no implicit address-of for a *T param typed as T), then the
correctly-resolved shadow FuncId was called with the mis-typed arg — a value
bit-cast to a pointer → segfault.
The bare-identifier branch now routes through the SAME resolveBareCallee
resolver one layer earlier and takes the param target types from the RESOLVED
author's lowered func.params (userParamTypes). Only the .func (single resolved
author) outcome reroutes; .ambiguous keeps the existing loud call-site
diagnostic and .none keeps the first-wins fallback, so single-author / local /
std / qualified resolution is byte-for-byte unchanged. Method-call / namespace /
foreign / generic branches of resolveCallParamTypes are untouched. The resolver
is idempotent (bareAuthorFuncId guards body lowering via lowered_fids) so the
extra call from param-type resolution is safe; lowerFunctionBodyInto already
saves/restores all lowering state for mid-call reentry.
Regression: examples/0728-modules-flat-same-name-paramtype — two flat file
imports each author `apply` with a divergent param type (a.sx value `s64`
winner, b.sx pointer `*s64` shadow). b.sx's from_b passes a value local to its
pointer-param author via implicit address-of (×2 → 42); a.sx's from_a (own ==
winner) is unchanged (value + 1 → 11). Fails on the pre-fix typing (segfault at
from_b); passes after.
Gate (worktree): zig build, zig build test (400/400), bash tests/run_examples.sh
(464 passed / 0 failed) all green. Matrix 0722-0727 unchanged. Guardrail: m3te
builds via the worktree binary (sx build --target ios-sim, exit 0) — single-
author / local resolution intact. Default-arg / closure / UFCS / comptime SITES
remain first-wins (fix-0102d).
