axon-frontend 0.3.0

AXON compiler frontend — lexer, parser, AST, epistemic type system, type checker, IR generator, compile-time checker. Zero runtime dependencies (no tokio/axum/sqlx/reqwest); consumable by any tool that analyses AXON source without running it. v0.3.0 closes Fase 14 (lossless lexing): the lexer emits comment tokens (`LineComment`, `BlockComment`, `DocLineComment`, `DocBlockComment`, `InnerDocLineComment`, `InnerDocBlockComment`) and the parser materialises them as `Trivia` attached to every Declaration variant via `leading_trivia` / `trailing_trivia` fields — the API surface that powers `axon fmt`, axon-lsp's formatter and hover docstring rendering, and any rustdoc-style documentation generator. Back-compatible: existing callers see empty trivia tuples until they opt in. v0.2.0 added Fase 13 typed channels (channel/emit/publish/discover) + `channel_analysis` module for LSP integration.
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//! §Fase 11.e — OTS (Ontological Tool Synthesis) compile-time slug catalogs.
//!
//! These constants are consumed by `type_checker` to validate that
//! `ots:transform:*` and `ots:backend:*` effect slugs carry only
//! qualifiers from the closed catalog. The runtime side of OTS —
//! pipeline execution, transformer registry, native transcoders,
//! ffmpeg subprocess fallback — lives in the `axon` runtime crate
//! at `axon_rs::ots` and re-exports these constants for backward
//! compatibility.
//!
//! Keeping the catalog here (not in the runtime) means any tool that
//! analyses AXON source (LSP, linters, analyzers) can validate OTS
//! usage without linking the full runtime.

/// Effect slug `ots:transform:<from>:<to>` declares a tool as
/// performing a kind conversion. The checker verifies a path exists.
pub const OTS_TRANSFORM_EFFECT_SLUG: &str = "ots:transform";

/// Effect slug `ots:backend:<kind>` declares HOW the conversion
/// happens. Closed qualifier set — new backends require a patch.
pub const OTS_BACKEND_EFFECT_SLUG: &str = "ots:backend";

/// Catalogue of valid `ots:backend:<qualifier>` qualifiers.
pub const OTS_BACKEND_CATALOG: &[&str] = &["native", "ffmpeg"];