build(manifest): dep posture per ADR-002/009; drop alktype; declare bast-codegen

- pin handlebars = "6.4" on default features; tree verified free of walkdir and rhai
- remove alktype from deps: no consuming code in v0.1.0, so an optional
  entry would be a dead feature; re-add lands with bast-rust-codecs as
  bast-codegen = ["dep:alktype"] (flagged for the wave-1 gate)
- declare [features] bast-codegen = [] (name reserved per ADR-009, gates nothing)
- package metadata to the text-generation framing (ADR-001): description,
  keywords, and the src/lib.rs crate doc; version stays 0.1.0

Verified: cargo test, clippy -D warnings, fmt --check,
wasm32 release build, taskgraph validate, dep-tree inspection

Cargo.toml

@@ -4,10 +4,10 @@ version = "0.1.0"
 edition = "2021"
 rust-version = "1.85"
 license = "MIT OR Apache-2.0"
-description = "Template-based codegen engine: handlebars-rust templates over alktype BAST documents, producing readers, writers, validators, and protocol handlers."
+description = "Text-generation engine: handlebars-rust templates rendered over serde-serializable contexts with strict, deterministic output, for HTML SSR, codegen, and WGSL artifacts."
 repository = "https://git.alk.dev/alkdev/alkgen"
 readme = "README.md"
-keywords = ["codegen", "handlebars", "templates", "bast", "alktype"]
+keywords = ["handlebars", "templates", "text-generation", "templating", "html"]
 categories = ["development-tools", "template-engine"]
 exclude = [".opencode/", "AGENTS.md", "docs/reviews/", "docs/research/", "docs/sdd_process.md"]
 
@@ -16,9 +16,9 @@ name = "alkgen"
 
 [features]
 default = []
+bast-codegen = []
 
 [dependencies]
-alktype = "0.4.0"
 handlebars = "6.4"
 serde = { version = "1", features = ["derive"] }
 serde_json = { version = "1", features = ["preserve_order"] }

src/lib.rs

@@ -1 +1 @@
-//! alkgen: template-based codegen engine over alktype BAST documents.
+//! alkgen: text-generation engine on handlebars-rust templates over serde-serializable contexts.

tasks/implementation/w1-manifest.md

@@ -1,7 +1,7 @@
 ---
 id: w1-manifest
 name: "Wave 1: manifest landing (dep pins, alktype removal, feature graph)"
-status: pending
+status: completed
 depends_on: []
 scope: single
 risk: low
@@ -44,15 +44,15 @@ task starts before it.
 
 ## Acceptance Criteria
 
-- [ ] `handlebars` pinned `6.4`; `cargo tree` shows no `walkdir` and
+- [x] `handlebars` pinned `6.4`; `cargo tree` shows no `walkdir` and
       no `rhai` (off-limits features provably not pulled in)
-- [ ] `alktype` absent from the dependency tree; `bast-codegen`
+- [x] `alktype` absent from the dependency tree; `bast-codegen`
       declared under `[features]` gating nothing
-- [ ] package description/keywords updated to the text-generation
+- [x] package description/keywords updated to the text-generation
       framing; version still 0.1.0
-- [ ] `cargo build --target wasm32-unknown-unknown --release` passes
+- [x] `cargo build --target wasm32-unknown-unknown --release` passes
       on the landed dep set (ADR-003 validation posture)
-- [ ] `cargo test`, `cargo clippy --all-targets -- -D warnings`,
+- [x] `cargo test`, `cargo clippy --all-targets -- -D warnings`,
       `cargo fmt --check`, `taskgraph validate` pass
 
 ## References
@@ -79,3 +79,36 @@ task starts before it.
 ## Summary
 
 > Agent fills this on completion.
+
+Landed 2026-11-06. `Cargo.toml` is the ADR-002/ADR-009 posture:
+
+- `handlebars = "6.4"` from crates.io on the substrate's default
+  features (resolves to 6.4.4); no extra features enabled. `cargo
+  tree` (also with `-e features`) shows zero `walkdir` and zero
+  `rhai` hits, so `dir_source` and `script_helper` are provably not
+  pulled in (ADR-002 decision 4, ADR-003).
+- `alktype` removed from `[dependencies]` entirely, matching the
+  interpretation in the Notes: with no consuming code, an
+  `optional = true` entry or a `bast-codegen` alias to nothing is the
+  same dead entry with more moving parts. The re-add lands with the
+  bast-rust-codecs set as `bast-codegen = ["dep:alktype"]` (flagged
+  for the wave-1 gate to confirm against ADR-009 item 4).
+- `[features]` declares `bast-codegen = []` (name reserved per
+  ADR-009; gates nothing; first consuming code arrives with
+  bast-rust-codecs). `default = []` unchanged.
+- Package metadata moved to the text-generation framing (ADR-001):
+  description now reads "Text-generation engine: handlebars-rust
+  templates rendered over serde-serializable contexts with strict,
+  deterministic output, for HTML SSR, codegen, and WGSL artifacts";
+  keywords are `handlebars`, `templates`, `text-generation`,
+  `templating`, `html` (the BAST/alktype/codegen keywords go). The
+  crate-level doc line in `src/lib.rs` updated to match. Version
+  stays `0.1.0` (the publish task verifies, never bumps).
+- `serde` + `serde_json` with `preserve_order` and `thiserror = "2"`
+  unchanged (convention 5; the error model task's base).
+
+Verification on the landed dep set: `cargo test`,
+`cargo clippy --all-targets -- -D warnings`, `cargo fmt --check`,
+`cargo build --target wasm32-unknown-unknown --release`,
+`taskgraph validate` (14 tasks valid), and the tree inspection above,
+all green.