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.
Re-land the value-const analog of the E1-E4 type work, reconciled onto the
current source-keyed resolver and hardened. A same-name VALUE const declared in
multiple flat-imported modules is now resolved per declaring source, not the
global last-wins `module_const_map`.
- imports.zig: `isPerSourceDecl` retains every non-function `const_decl`
per-source (value consts + type aliases), so each same-name author reaches
registration as a distinct author of its own module. Functions and var_decls
keep first-wins.
- lower.zig:
* `selectModuleConst` over `module_consts_by_source` — own-wins; exactly one
flat-visible resolves; >=2 flat-visible bare -> loud ambiguous (consistent
with the 0755 type / 0724 fn / 0782 generic ambiguities). Rewires every
consumer: `comptimeIntNamed`, the runtime-id read, the global-init read,
and the float-name path (`lookupFloatName` / `nameIsFloatTyped`).
* `SourceConstCtx` + `foldSourceConstInt`/`Float` + `sourceConstIsFloatTyped`
fold a selected const's RHS with nested same-name leaves re-selected in
their own author source, so VALUE and array-DIMENSION results are coherent.
* `pinConstAuthorSource` pins each fold level to the SELECTED const's author
(F1), including multi-level cross-module chains.
* cycle guard keyed on (name, author-source), not name alone (F3), so
same-name nested consts across modules do not trip a false cycle.
* `emitModuleConst` takes the author source and pins while folding/lowering.
Registration-time struct/inline-type field dimensions route through the now
source-aware stateful reader; the type-alias dimension path resolves each
alias against its own author's consts.
- program_index.zig: expose `isFloatConstType` / `isCountableConstType` for the
source-aware folds.
examples: 0786 own-wins, 0787 ambiguous (exit 1), 0788 expr-chain value+dim
coherent, 0789 leaf-author-pin, 0790 cross-module cycle-guard (F3), 0791
multi-level cross-module chain, 0792 struct-field registration-time dim.
Single-author corpus byte-identical (524 prior markers green); 531 total.
