Files
AILang/design/INDEX.md
T
Brummel bcd41810f4 design/ + source rustdoc: replace opaque shorthand with content phrases + links
Reader-facing prose and rustdoc carried opaque shorthand like
"Decision 10", "clause-5", "mq.1", "ct.1", "eob.1", "rpe.1",
"post-mq.3", and "Iter 22b.1:" with no in-repo definition the reader
could follow. This commit replaces every such occurrence in the
durable tier the reader is most likely to land on (design/ ledger +
source //! module headers + the central /// public-item rustdoc) with
an inline content phrase plus, where applicable, a Markdown link to
the file that defines the referenced concept.

design/ ledger — 16 files:
  Definition-site headings demoted from "Decision N: <title>" to
  "<title>": authoring-surface, tail-calls, memory-model section in
  rc-uniqueness.md, dual-allocator section, typeclass design,
  effects "pure core + algebraic effects".
  Cross-reference sites: "Decision 1" -> canonical-schema principle
  (data-model); "Decision 3/4" -> effects + scope-boundaries; "Decision
  6" -> authoring-surface; "Decision 8" -> tail-calls; "Decision 9" ->
  rc-uniqueness (dual-allocator); "Decision 10" -> memory-model;
  "Decision 11" -> typeclasses (model). "clause-5" -> body-link
  durability gate. "clause-3" (in language-constraints) ->
  bug-class-reintroduction discriminator. "mq.1/2/3", "ct.1/4",
  "eob.1", "rpe.1" -> the canonical-form rule / the type-driven
  dispatch / the Str carve-out / etc. "post-mq.3" -> "type-driven".

design/contracts/feature-acceptance.md: file-local "clauses 1/2/3"
-> "criteria 1/2/3" (sprachliche Kohärenz mit der File-Überschrift
"Feature-acceptance criterion"); "the clause-3 mechanism" -> "the
bug-class-reintroduction discriminator".

Source //! module headers — 24 files:
  Stripped "Iter X.Y:" prefixes and "(Decision N)" / "(mq.X)" tags
  from spec_drift, uniqueness, reuse_shape, migrate_canonical_types,
  typeclass_22b{2,3,c}, suppress_filter, lift, mono, linearity,
  diagnostic, method_dispatch_pin, method_collision_pin,
  no_per_type_print_ops, mq3_multi_class_e2e, print_mono_body_shape,
  print_no_leak_pin, cli_diag_human_workspace_load_error,
  ct1_check_cli, prose snapshot, unbound_in_instance_method_pin,
  mono_xmod_ctor_pattern, desugar.

Central /// public-item rustdoc:
  ast.rs (full sweep — every "Iter X" + "Decision N" prefix
  reformulated; mode/Type::Fn rustdoc now points at memory-model.md;
  Constraint / SuperclassRef / InstanceDef / ClassDef rustdoc points
  at typeclasses contract).
  diagnostic.rs (all "(Iter X)" / "(mq.X)" tags on diagnostic codes
  removed).
  lib.rs (FORM_A_SPEC rustdoc points at authoring-surface.md
  instead of "Decision 6").
  canonical.rs (type_hash + Float-literal rustdoc).

Still outstanding (for a follow-up commit): ~500 inline `//`
code-body comments with `Iter X.Y` markers across the workspace, and
a handful of `///` rustdoc items in hash_pin / workspace_pin / lift /
mono / suppress_filter test-pin and internal-function bodies. Code
identifiers (test filenames like `mq3_multi_class_e2e.rs`, function
names like `iter18e_drop_iterative_default_preserves_hashes`) stay
verbatim per the user's "code identifiers stay verbatim" rule.

Tests: design_index_pin 5/5 + docs_honesty_pin 5/5; workspace builds
clean; full `cargo test --workspace` previously green (every
`test result: ok` line, no FAILED line).
2026-05-20 09:47:33 +02:00

112 lines
7.2 KiB
Markdown

# AILang Design — Index
The sole addressable entry point. Every contract and model is
reached from here. A contract is a prescriptive, test-linked
invariant; a model is a whitepaper narrative. `ratifying-test` names
the green test that proves a contract still holds. `link` is
polymorphic: a `design/` file, or the authoritative source `//!`
header when the code is the single source of truth.
## Project framing
### Goal
AILang is a programming language for LLM authors. It compiles to LLVM IR.
Performance: native, no GC for the MVP.
Optimised for:
- **Machine readability** over human ergonomics. The source is structured.
- **Local reasoning.** Every definition carries its full type and effects.
- **Provability.** Pure core language, explicit effects, optional refinements.
- **Robustness against hallucinations.** Symbols are hashable; tools can verify
existence without spending context window.
### Project ecosystem
AILang is not just a language but an ecosystem. The language on its own is
only valuable when its surroundings make it usable, checkable, and
extensible for its target user (LLM authors). The repo therefore contains
several equally important components — none of them optional, all of them
evolving in lockstep with the language:
- **Language core** (`crates/ailang-core`, `crates/ailang-check`,
`crates/ailang-codegen`): AST, type system, codegen.
- **Surface forms** (`crates/ailang-surface`, `crates/ailang-prose`):
the LLM-facing renderings of a module. `ailang-surface`
is the lossless Form-A printer/parser — the canonical
[authoring surface](contracts/authoring-surface.md), with a
round-trip property `parse ∘ print = id` gating every release. `ailang-prose`
is the lossy Form-B projection — human-readable prose for review and
edit, with no parser; re-integration goes through the
LLM-mediator round-trip documented in `docs/PROSE_ROUNDTRIP.md`.
- **CLI** (`crates/ail`): toolchain for tooling consumers — `manifest`,
`describe`, `deps`, `check`, `build`, `parse`, `render`, `prose`,
`merge-prose`, etc., preferably with `--json` for machine consumption.
- **Examples** (`examples/`): canonical `.ail.json` programs. They are
specification anchors, not demos — the E2E suite hangs off them.
- **Skills** (`skills/`): specialised disciplines
(`brainstorm`, `planner`, `implement`, `audit`, `debug`,
`fieldtest`) plus the agent rosters they dispatch
(`skills/<name>/agents/`). They form the project's own
development methodology and are versioned with the codebase.
See `skills/README.md`.
- **Design ledger** (`design/`): `design/INDEX.md` (this file — the
sole addressable spine for canonical state), `design/contracts/`
(test-linked invariants), `design/models/` (onboarding
whitepapers).
- **Docs** (`docs/`): `docs/journals/` (per-iter decisions log; see
`INDEX.md`), `docs/journal-archive.md` (archived monolith for
pre-2026-05-11 history), `roadmap.md` (forward queue), `specs/`
(per-milestone design specs), `plans/` (per-iteration
implementation plans).
- **Tests**: unit tests per crate plus E2E in `crates/ail/tests/e2e.rs`. Every
new compiler path needs a test, otherwise the feature does not count as done.
### Project language: English
All in-tree content is written in English: source code (identifiers,
comments, string literals, CLI help), design documents, the journal, agent
prompts, READMEs, commit messages, examples, and `CLAUDE.md`. The live
conversation between user and me stays German for ergonomic reasons;
everything that lands in git is English. This keeps diffs and tooling output
uniform and matches the audience for AILang (LLM authors), for whom English
is the default.
## Contracts
| id | consumer / lifetime | ratifying-test | link |
|----|---------------------|----------------|------|
| feature-acceptance | brainstorm-gate / stable | skills/brainstorm/SKILL.md | design/contracts/feature-acceptance.md |
| authoring-surface | LLM author / stable | crates/ailang-surface/tests/round_trip.rs | design/contracts/authoring-surface.md |
| roundtrip-invariant | every release / stable | crates/ailang-surface/tests/round_trip.rs | design/contracts/roundtrip-invariant.md |
| language-constraints | LLM author / stable | crates/ailang-check/src/uniqueness.rs (in-source mod tests) | design/contracts/language-constraints.md |
| memory-model | LLM author / stable | crates/ailang-check/src/uniqueness.rs (in-source mod tests) | design/contracts/memory-model.md |
| data-model | LLM author / stable | crates/ailang-core/tests/design_schema_drift.rs | design/contracts/data-model.md |
| mangling | codegen / stable | crates/ail/tests/eq_ord_e2e.rs | crates/ailang-codegen/src/lib.rs //! |
| env-construction | codegen / stable | crates/ailang-check/tests/duplicate_ctor_pin.rs | crates/ailang-codegen/src/lib.rs //! |
| qualified-xref | codegen / stable | crates/ail/tests/codegen_import_map_fallback_pin.rs | crates/ail/src/main.rs //! |
| frozen-value-layout | embedding ABI / one-way-frozen| crates/ailang-codegen/tests/embed_record_layout_pin.rs | design/contracts/frozen-value-layout.md + runtime/rc.c §layout |
| float-semantics | LLM author / stable | crates/ail/tests/eq_float_noinstance.rs | design/contracts/float-semantics.md |
| typeclasses | LLM author / stable | crates/ail/tests/show_no_instance_e2e.rs | design/contracts/typeclasses.md |
| method-dispatch | LLM author / stable | crates/ail/tests/show_no_instance_e2e.rs | design/contracts/method-dispatch.md |
| prelude-classes | LLM author / stable | crates/ail/tests/show_no_instance_e2e.rs | design/contracts/prelude-classes.md |
| str-abi | runtime ABI / stable | crates/ail/tests/e2e.rs (Str path) | design/contracts/str-abi.md + runtime/str.c §heap-Str |
| tail-calls | codegen / stable | crates/ailang-check/src/lib.rs (in-source tail_call_in_non_tail_position_is_rejected) | design/contracts/tail-calls.md |
| honesty-rule | architect+grounding / stable | crates/ailang-core/tests/docs_honesty_pin.rs | design/contracts/honesty-rule.md |
| embedding-abi | embedding host / stable | crates/ailang-codegen/tests/embed_record_layout_pin.rs | design/contracts/embedding-abi.md |
| scope-boundaries | architect+author / stable | crates/ailang-core/tests/effect_doc_honesty_pin.rs | design/contracts/scope-boundaries.md |
| verification | architect / stable | bench/architect_sweeps.sh | design/contracts/verification.md |
## Models
| id | consumer / lifetime | link |
|----|---------------------|------|
| rc-uniqueness | onboarding / evolves | design/models/rc-uniqueness.md |
| typeclasses | onboarding / evolves | design/models/typeclasses.md |
| effects | onboarding / evolves | design/models/effects.md |
| authoring-surface | onboarding / evolves | design/models/authoring-surface.md |
| prose-projection | onboarding / evolves | design/models/prose-projection.md |
| pipeline | onboarding / evolves | design/models/pipeline.md |