Second iteration of the kernel-extension-mechanics milestone. Ships
the `new` Form-A keyword + `Term::New { type_name, args: Vec<NewArg> }`
AST variant + `NewArg::Type|Value` enum end-to-end through schema /
surface / checker, with two new diagnostics
(`NewTypeNotConstructible`, `NewArgKindMismatch`), a new arm in
prep.1's workspace-wide normalisation pre-pass `qualify_workspace_term`
that rewrites bare `Term::New.type_name` to qualified form
(symmetric to the existing `Term::Ctor` arm), and the data-model.md
+ form_a.md anchor additions. Codegen out of scope per spec; codegen
sites get `CodegenError::Internal` arms naming the raw-buf milestone
as the carrier.
Verification:
- `cargo test --workspace`: 654 tests passing, 0 failed.
- 3 new in-source checker tests pin the elaboration paths:
`new_resolves_via_type_scope` (the spec's worked Counter example
checks cleanly), `new_type_not_constructible` (missing `new` def
in home module fires the new diagnostic), `new_arg_kind_mismatch_value_where_type`
(kind-mismatch detection).
- 2 new schema-drift pins (`term_new_round_trips`,
`term_new_type_arg_round_trips`) ratify the JSON byte shape:
`{"t": "new", "type": "<TypeName>", "args": [{"kind": "type"|"value",
"value": ...}]}`.
- 1 new surface round-trip pin exercises mixed-kind args through
Form-A → JSON → Form-A.
- 44+ exhaustive Term-match sites across 24 files extended with
`Term::New` arms — workspace-wide cargo build clean.
Concerns documented inline:
- `crates/ailang-core/tests/schema_coverage.rs` deliberately does
NOT register `VariantTag::TermNew` in the `EXPECTED_VARIANTS`
set. The coverage test asserts every declared variant is
observed in the .ail fixture corpus; no .ail fixture in the
current tree emits `"t": "new"` (codegen-runnable Term::New
programs require the raw-buf milestone's plugin registry).
Registering would fail the coverage check. The `visit_term` arm
IS extended (compile-forced); only the enum registration is
deferred. Inline rationale in the source. Future milestone that
ships a Term::New fixture extends both sides.
- `crates/ailang-surface/src/print.rs` `write_term` Term::New arm
was added in Task 1 (not Task 2 as planned), because without it
ailang-core's tests fail to compile (the surface crate is in
the dependency graph of ailang-core's test binaries). Task 2's
round-trip pin verified the arm's correctness.
- Task 3 (synth elaboration) needed one implementer re-loop: the
first attempt over-qualified within-module type-references via
`qualify_local_types` on `new`'s signature when the home module
was the calling module itself. Fixed by skipping qualification
when `home_module == env.current_module`.
Architectural composition with prep.1: `Term::New` joins
`Term::Ctor` as a `type_name`-bearing site that goes through
`qualify_workspace_term`'s bare→qualified rewrite before the
checker sees it. The checker's `synth` arm for `Term::New`
therefore receives an already-qualified `type_name` (or a local
bare name for same-module construction).
Milestone status: kernel-extension-mechanics (Gitea #6) advances
2/3 iters. Next: prep.3 (kernel-tier modules + param-in), issue #33.
All 176 files in the four accumulating directories now use a
zero-padded 4-digit counter prefix that reflects creation order
(`NNNN-slug.md`). The counter is assigned per directory in strict
git-log creation order; ties broken alphabetically by original name.
The old `YYYY-MM-DD-` prefix on docs/specs/ and docs/plans/ files is
dropped — the date is recoverable from git log and the counter
carries the ordering.
A file's counter is stable for the life of the file: never reassigned,
never reused, never compacted. Deleted files retire their counter;
subsequent files do not fill the gap. This is the property that lets
cross-references stay literal — refs use the full filename including
the counter (`design/contracts/0007-honesty-rule.md`) so they grep
cleanly and resolve directly without a glob step.
313 cross-references updated across .md/.rs/.toml/.c/.json files
(test pins, include_str! paths, design-INDEX entries, baseline notes,
runtime C comments, inter-contract markdown links incl. bare basename
and `../models/foo.md` forms).
CLAUDE.md gets a new "File-naming convention" section spelling out
the rule and rationale. skills/brainstorm/SKILL.md and
skills/planner/SKILL.md updated so new spec/plan creation produces
counter-prefixed names from the start.
The full test suite (cargo test --workspace) passes.
Brummel