diff --git a/.claude/rules/xtask.md b/.claude/rules/xtask.md
index 140e32c83..fb0803c3f 100644
--- a/.claude/rules/xtask.md
+++ b/.claude/rules/xtask.md
@@ -25,9 +25,10 @@ paths:
 
 ## Dev tool version pinning
 
-Dev tools whose versions must match Cargo.lock (e.g., `wasm-bindgen-cli`) are installed
-via `cargo xtask dev-setup`, which reads the locked version automatically. Never hardcode
-these versions in CI workflows or documentation — always use `cargo xtask dev-setup`.
+Dev tools whose versions must match Cargo.lock (e.g., `wasm-bindgen-cli`) are pinned in
+`crates/xtask/src/dev_setup.rs`. When updating `wasm-bindgen` in Cargo.lock, also update
+the pinned version in `dev_setup.rs` to match. CI workflows extract the version directly
+from `crates/wasm-quarto-hub-client/Cargo.lock` to avoid duplication.
 
 ## Adding a new subcommand
 
diff --git a/.github/workflows/build-wasm.yml b/.github/workflows/build-wasm.yml
deleted file mode 100644
index 95f1af7b7..000000000
--- a/.github/workflows/build-wasm.yml
+++ /dev/null
@@ -1,58 +0,0 @@
-# Tests a broad set of Quarto functionality that users are likely to encounter.
-# A failure indicates some signficant portion of functionality is likely to be broken.
-name: Build WASM Artifacts
-on: workflow_dispatch
-jobs:
-  build-wasm:
-    runs-on: ubuntu-latest
-    
-    name: Build WASM Artifacts
-    
-    steps:
-      - uses: actions/checkout@v6
-      - name: Set up Rust nightly
-        uses: dtolnay/rust-toolchain@nightly
-
-      - name: Set up build tools
-        if: runner.os == 'linux'
-        shell: bash
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y build-essential curl file git
-
-      - name: Set up Clang
-        uses: egor-tensin/setup-clang@v2
-        with:
-          version: latest
-          platform: x64
-    
-      - name: Setup wasm-pack
-        shell: bash
-        run: |
-          cargo install wasm-pack
-
-      # tree-sitter setup
-      - name: Set up tree-sitter CLI (Linux)
-        if: runner.os == 'Linux'
-        run: |
-          sudo apt-get install libc6-dev
-          sudo apt-get install gcc-multilib
-          curl -LO https://github.com/tree-sitter/tree-sitter/releases/download/v0.25.8/tree-sitter-linux-x86.gz
-          gunzip tree-sitter-linux-x86.gz
-          chmod +x tree-sitter-linux-x86
-          sudo mv tree-sitter-linux-x86 /usr/local/bin/tree-sitter
-
-      # build and run tests
-      - name: Build
-        run: |
-          cd crates/wasm-qmd-parser
-          export CFLAGS_wasm32_unknown_unknown="-I$(pwd)/wasm-sysroot -Wbad-function-cast -Wcast-function-type -fno-builtin -DHAVE_ENDIAN_H"
-          wasm-pack build --target web --dev
-        shell: bash
-    
-      # upload artifacts
-      - name: Upload WASM Artifacts
-        uses: actions/upload-artifact@v7
-        with:
-          name: wasm-qmd-parser
-          path: crates/wasm-qmd-parser/pkg
\ No newline at end of file
diff --git a/.github/workflows/hub-client-e2e.yml b/.github/workflows/hub-client-e2e.yml
index d8ef6103b..b793c3544 100644
--- a/.github/workflows/hub-client-e2e.yml
+++ b/.github/workflows/hub-client-e2e.yml
@@ -32,11 +32,9 @@ jobs:
             [ "$time" != "@0" ] && touch -d "$time" "$file" 2>/dev/null || true
           done
 
-      # Rust toolchain for WASM build
-      - name: Set up Rust nightly
-        uses: dtolnay/rust-toolchain@nightly
-        with:
-          targets: wasm32-unknown-unknown
+      # Install toolchain from rust-toolchain.toml (nightly + components + targets)
+      - name: Set up Rust
+        run: rustup show active-toolchain
 
       - name: Set up Clang
         uses: egor-tensin/setup-clang@v2
@@ -48,9 +46,6 @@ jobs:
         with:
           cache-on-failure: true
 
-      - name: Install wasm-pack
-        run: cargo install wasm-pack
-
       # tree-sitter for grammar builds
       - name: Set up tree-sitter CLI
         run: |
@@ -72,6 +67,19 @@ jobs:
       - name: Build TypeScript packages
         run: npm run build
 
+      # wasm-bindgen-cli must match the wasm-bindgen version in Cargo.lock
+      # Use pre-built binary via taiki-e/install-action (faster, avoids transitive dep issues)
+      - name: Detect wasm-bindgen version
+        id: wb-version
+        run: |
+          VERSION=$(grep -A1 'name = "wasm-bindgen"' crates/wasm-quarto-hub-client/Cargo.lock | grep version | head -1 | sed 's/.*"\(.*\)"/\1/')
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+
+      - name: Install wasm-bindgen-cli
+        uses: taiki-e/install-action@v2
+        with:
+          tool: wasm-bindgen-cli@${{ steps.wb-version.outputs.version }}
+
       # Build WASM module
       - name: Build WASM
         run: |
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 4184d6506..5d04f3001 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -46,13 +46,9 @@ jobs:
         id: set-up-homebrew
         uses: Homebrew/actions/setup-homebrew@main
 
-      # Consistent Rust setup for both platforms
-      - name: Set up Rust nightly
-        uses: dtolnay/rust-toolchain@nightly
-
-      - name: Output rust version
-        shell: bash
-        run: rustup --version
+      # Install toolchain from rust-toolchain.toml (nightly + components + targets)
+      - name: Set up Rust
+        run: rustup show active-toolchain
 
       # Cache Rust AFTER toolchain is set up
       - name: Cache Rust dependencies
diff --git a/.github/workflows/ts-test-suite.yml b/.github/workflows/ts-test-suite.yml
index 0acb179ab..2df5437a9 100644
--- a/.github/workflows/ts-test-suite.yml
+++ b/.github/workflows/ts-test-suite.yml
@@ -46,13 +46,9 @@ jobs:
         id: set-up-homebrew
         uses: Homebrew/actions/setup-homebrew@main
 
-      # Consistent Rust setup for both platforms
-      - name: Set up Rust nightly
-        uses: dtolnay/rust-toolchain@nightly
-
-      - name: Output rust version
-        shell: bash
-        run: rustup --version
+      # Install toolchain from rust-toolchain.toml (nightly + components + targets)
+      - name: Set up Rust
+        run: rustup show active-toolchain
 
     #   # Cache Rust AFTER toolchain is set up
     #   - name: Cache Rust dependencies
@@ -123,9 +119,19 @@ jobs:
         run: brew install llvm
         shell: bash
 
-      - name: Install wasm-bindgen-cli
+      # wasm-bindgen-cli must match the wasm-bindgen version in Cargo.lock
+      # Use pre-built binary via taiki-e/install-action (faster, avoids transitive dep issues)
+      - name: Detect wasm-bindgen version
+        id: wb-version
         shell: bash
-        run: cargo install wasm-bindgen-cli --version 0.2.108
+        run: |
+          VERSION=$(grep -A1 'name = "wasm-bindgen"' crates/wasm-quarto-hub-client/Cargo.lock | grep version | head -1 | sed 's/.*"\(.*\)"/\1/')
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+
+      - name: Install wasm-bindgen-cli
+        uses: taiki-e/install-action@v2
+        with:
+          tool: wasm-bindgen-cli@${{ steps.wb-version.outputs.version }}
 
       - name: Build WASM module
         shell: bash
diff --git a/CLAUDE.md b/CLAUDE.md
index 751a2d2ce..39e8571d9 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -271,11 +271,12 @@ When fixing ANY bug:
 - `quarto-treesitter-ast`: generic tree-sitter AST traversal utilities
 
 **WASM:**
-- `wasm-qmd-parser`: WASM module with entry points from `pampa` (see [crates/wasm-qmd-parser/CLAUDE.md](crates/wasm-qmd-parser/CLAUDE.md) for build instructions)
+- `wasm-quarto-hub-client`: WASM client for hub-client (see [crates/wasm-quarto-hub-client/README.md](crates/wasm-quarto-hub-client/README.md) for build instructions)
+- `wasm-qmd-parser`: lightweight parsing-only WASM wrapper around `pampa` (dormant — kept for future use)
 
 ### `hub-client/` - Quarto Hub web client
 
-A React/TypeScript web application for collaborative editing of Quarto projects. Uses Automerge for real-time sync and the WASM build of `wasm-qmd-parser` for live preview rendering.
+A React/TypeScript web application for collaborative editing of Quarto projects. Uses Automerge for real-time sync and the WASM build of `wasm-quarto-hub-client` for live preview rendering.
 
 **Key directories:**
 - `src/components/` - React components (Editor, FileSidebar, tabs, etc.)
@@ -309,7 +310,8 @@ All VFS file paths use the `/project/` prefix. When resolving file paths in WASM
 
 - `pampa` is the core Quarto engine crate
 - `quarto-core` handles higher-level orchestration
-- `wasm-quarto-hub-client` is the WASM client (NOT wasm-qmd-parser)
+- `wasm-quarto-hub-client` is the active WASM client for hub-client
+- `wasm-qmd-parser` is dormant — a lightweight parsing-only WASM wrapper kept for future use
 - Always check `git diff` for uncommitted changes before starting work on a continuation session
 
 ## hub-client Commit Instructions
diff --git a/Cargo.toml b/Cargo.toml
index f7e223eed..7ad82a3bd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ members = [
 ]
 default-members = ["crates/*", "crates/experiments/reconcile-viewer"]
 # Excluded crates require special build toolchains or targets:
-# - WASM crates: build with wasm-pack or --target wasm32-unknown-unknown
+# - WASM crates: require --target wasm32-unknown-unknown and -Zbuild-std (see dev-docs/wasm.md)
 # - pampa/fuzz: requires nightly Rust + libfuzzer-sys (Linux/macOS only), run via `cargo fuzz`
 # crates/experiments is a container directory, not a crate, so we exclude it from crates/* matching.
 exclude = [
@@ -97,9 +97,6 @@ path = "./crates/tree-sitter-qmd"
 [workspace.dependencies.tree-sitter-sexpr]
 path = "./crates/tree-sitter-sexpr"
 
-[workspace.dependencies.wasm-qmd-parser]
-path = "./crates/wasm-qmd-parser"
-
 [workspace.dependencies.pampa]
 path = "./crates/pampa"
 default-features = false
@@ -273,7 +270,7 @@ lua-src = { path = "crates/lua-src-wasm" }
 # Profiles must be set at the workspace level
 [profile.dev]
 # Tell `rustc` to optimize for small code size to
-# work around "too many locals" error from wasm-pack
+# work around "too many locals" error in WASM builds
 # https://github.com/wasm-bindgen/wasm-bindgen/issues/3451#issuecomment-1562982835
 opt-level = "s"
 
diff --git a/crates/wasm-qmd-parser/.appveyor.yml b/crates/wasm-qmd-parser/.appveyor.yml
deleted file mode 100644
index 50910bd6f..000000000
--- a/crates/wasm-qmd-parser/.appveyor.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-install:
-  - appveyor-retry appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - if not defined RUSTFLAGS rustup-init.exe -y --default-host x86_64-pc-windows-msvc --default-toolchain nightly
-  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
-  - rustc -V
-  - cargo -V
-
-build: false
-
-test_script:
-  - cargo test --locked
diff --git a/crates/wasm-qmd-parser/.cargo/config.toml b/crates/wasm-qmd-parser/.cargo/config.toml
deleted file mode 100644
index 1deefb166..000000000
--- a/crates/wasm-qmd-parser/.cargo/config.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-[target.wasm32-unknown-unknown]
-rustflags = ["-C", "target-feature=+bulk-memory", "-Zwasm-c-abi=spec"]
\ No newline at end of file
diff --git a/crates/wasm-qmd-parser/.github/dependabot.yml b/crates/wasm-qmd-parser/.github/dependabot.yml
deleted file mode 100644
index 7377d3759..000000000
--- a/crates/wasm-qmd-parser/.github/dependabot.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: 2
-updates:
-- package-ecosystem: cargo
-  directory: "/"
-  schedule:
-    interval: daily
-    time: "08:00"
-  open-pull-requests-limit: 10
diff --git a/crates/wasm-qmd-parser/.travis.yml b/crates/wasm-qmd-parser/.travis.yml
deleted file mode 100644
index 7a913256e..000000000
--- a/crates/wasm-qmd-parser/.travis.yml
+++ /dev/null
@@ -1,69 +0,0 @@
-language: rust
-sudo: false
-
-cache: cargo
-
-matrix:
-  include:
-
-  # Builds with wasm-pack.
-  - rust: beta
-    env: RUST_BACKTRACE=1
-    addons:
-      firefox: latest
-      chrome: stable
-    before_script:
-      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
-      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
-      - cargo install-update -a
-      - curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
-    script:
-      - cargo generate --git . --name testing
-      # Having a broken Cargo.toml (in that it has curlies in fields) anywhere
-      # in any of our parent dirs is problematic.
-      - mv Cargo.toml Cargo.toml.tmpl
-      - cd testing
-      - wasm-pack build
-      - wasm-pack test --chrome --firefox --headless
-
-  # Builds on nightly.
-  - rust: nightly
-    env: RUST_BACKTRACE=1
-    before_script:
-      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
-      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
-      - cargo install-update -a
-      - rustup target add wasm32-unknown-unknown
-    script:
-      - cargo generate --git . --name testing
-      - mv Cargo.toml Cargo.toml.tmpl
-      - cd testing
-      - cargo check
-      - cargo check --target wasm32-unknown-unknown
-      - cargo check                                 --no-default-features
-      - cargo check --target wasm32-unknown-unknown --no-default-features
-      - cargo check                                 --no-default-features --features console_error_panic_hook
-      - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
-      - cargo check                                 --no-default-features --features "console_error_panic_hook wee_alloc"
-      - cargo check --target wasm32-unknown-unknown --no-default-features --features "console_error_panic_hook wee_alloc"
-
-  # Builds on beta.
-  - rust: beta
-    env: RUST_BACKTRACE=1
-    before_script:
-      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
-      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
-      - cargo install-update -a
-      - rustup target add wasm32-unknown-unknown
-    script:
-      - cargo generate --git . --name testing
-      - mv Cargo.toml Cargo.toml.tmpl
-      - cd testing
-      - cargo check
-      - cargo check --target wasm32-unknown-unknown
-      - cargo check                                 --no-default-features
-      - cargo check --target wasm32-unknown-unknown --no-default-features
-      - cargo check                                 --no-default-features --features console_error_panic_hook
-      - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
-      # Note: no enabling the `wee_alloc` feature here because it requires
-      # nightly for now.
diff --git a/crates/wasm-qmd-parser/CLAUDE.md b/crates/wasm-qmd-parser/CLAUDE.md
deleted file mode 100644
index 34fbc2211..000000000
--- a/crates/wasm-qmd-parser/CLAUDE.md
+++ /dev/null
@@ -1,32 +0,0 @@
-# wasm-qmd-parser
-
-WASM build of the `pampa` qmd parser for use in browser environments.
-
-## Important: Excluded from Workspace
-
-This crate is **excluded from the default workspace build** because it cannot be compiled as a native shared library. The dependency chain pulls in V8 (via deno_core) which uses thread-local storage incompatible with native cdylib builds.
-
-Build this crate explicitly using wasm-pack as described below.
-
-## Build Instructions
-
-```bash
-cd crates/wasm-qmd-parser
-
-# macOS only: Use Homebrew LLVM (Apple Clang doesn't support wasm32-unknown-unknown)
-# Requires: brew install llvm
-export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
-
-# Set C flags for tree-sitter WASM compilation
-# - Include our C shims from wasm-sysroot
-# - Define HAVE_ENDIAN_H for tree-sitter's endian detection
-export CFLAGS_wasm32_unknown_unknown="-I$(pwd)/wasm-sysroot -Wbad-function-cast -Wcast-function-type -fno-builtin -DHAVE_ENDIAN_H"
-
-# Build with wasm-pack
-# Note: Requires opt-level = "s" in workspace profile.dev to avoid "too many locals" error
-wasm-pack build --target web --dev
-```
-
-## Output
-
-The built package is output to `pkg/` and can be used directly in web applications or published to npm.
diff --git a/crates/wasm-qmd-parser/README.md b/crates/wasm-qmd-parser/README.md
index 6b6840850..f6a1f785e 100644
--- a/crates/wasm-qmd-parser/README.md
+++ b/crates/wasm-qmd-parser/README.md
@@ -1,84 +1,26 @@
-<div align="center">
+# wasm-qmd-parser
 
-  <h1><code>wasm-pack-template</code></h1>
+> **Status: Dormant** — This crate is not actively maintained but kept for
+> future use as a lightweight parsing-only WASM module.
 
-  <strong>A template for kick starting a Rust and WebAssembly project using <a href="https://github.com/rustwasm/wasm-pack">wasm-pack</a>.</strong>
+Lightweight WASM wrapper around `pampa` for QMD parsing in browser/extension
+contexts. Unlike `wasm-quarto-hub-client` (which bundles the full rendering
+stack), this crate exposes only the parser — smaller output, faster load times.
 
-  <p>
-    <a href="https://travis-ci.org/rustwasm/wasm-pack-template"><img src="https://img.shields.io/travis/rustwasm/wasm-pack-template.svg?style=flat-square" alt="Build Status" /></a>
-  </p>
+## History
 
-  <h3>
-    <a href="https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/index.html">Tutorial</a>
-    <span> | </span>
-    <a href="https://discordapp.com/channels/442252698964721669/443151097398296587">Chat</a>
-  </h3>
+Originally built with `wasm-pack` and its own C stdlib shim. The C shim now
+lives in `wasm-quarto-hub-client/src/c_shim.rs`, and the build toolchain has
+shifted to `cargo build` + `wasm-bindgen` CLI (see `dev-docs/wasm.md`).
 
-  <sub>Built with 🦀🕸 by <a href="https://rustwasm.github.io/">The Rust and WebAssembly Working Group</a></sub>
-</div>
-
-## About
-
-[**📚 Read this template tutorial! 📚**][template-docs]
-
-This template is designed for compiling Rust libraries into WebAssembly and
-publishing the resulting package to NPM.
-
-Be sure to check out [other `wasm-pack` tutorials online][tutorials] for other
-templates and usages of `wasm-pack`.
-
-[tutorials]: https://rustwasm.github.io/docs/wasm-pack/tutorials/index.html
-[template-docs]: https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/index.html
-
-## 🚴 Usage
-
-### 🐑 Use `cargo generate` to Clone this Template
-
-[Learn more about `cargo generate` here.](https://github.com/ashleygwilliams/cargo-generate)
-
-```
-cargo generate --git https://github.com/rustwasm/wasm-pack-template.git --name my-project
-cd my-project
-```
-
-### 🛠️ Build with `wasm-pack build`
-
-```
-wasm-pack build
-```
-
-### 🔬 Test in Headless Browsers with `wasm-pack test`
-
-```
-wasm-pack test --headless --firefox
-```
-
-### 🎁 Publish to NPM with `wasm-pack publish`
-
-```
-wasm-pack publish
-```
-
-## 🔋 Batteries Included
-
-* [`wasm-bindgen`](https://github.com/rustwasm/wasm-bindgen) for communicating
-  between WebAssembly and JavaScript.
-* [`console_error_panic_hook`](https://github.com/rustwasm/console_error_panic_hook)
-  for logging panic messages to the developer console.
-* `LICENSE-APACHE` and `LICENSE-MIT`: most Rust projects are licensed this way, so these are included for you
+The crate will need updates before it can build again — the `pampa` API has
+evolved significantly since this was last maintained.
 
 ## License
 
 Licensed under either of
 
-* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
-* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE_APACHE))
+* MIT license ([LICENSE-MIT](LICENSE_MIT))
 
 at your option.
-
-### Contribution
-
-Unless you explicitly state otherwise, any contribution intentionally
-submitted for inclusion in the work by you, as defined in the Apache-2.0
-license, shall be dual licensed as above, without any additional terms or
-conditions.
diff --git a/crates/wasm-qmd-parser/build.md b/crates/wasm-qmd-parser/build.md
deleted file mode 100644
index 567e8b28b..000000000
--- a/crates/wasm-qmd-parser/build.md
+++ /dev/null
@@ -1,24 +0,0 @@
-
-```shell
-cd crates/wasm-qmd-parser
-# To work around this error, because Apple Clang doesn't work with wasm32-unknown-unknown?
-# I believe this is not required on a Linux machine.
-# Requires `brew install llvm`.
-# https://github.com/briansmith/ring/issues/1824
-# error: unable to create target: 'No available targets are compatible with triple "wasm32-unknown-unknown"'
-export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
-# To tell rustc to include our C shims located in `wasm-sysroot`, which we eventually compile into the project
-# with `c_shim.rs`.
-# https://github.com/tree-sitter/tree-sitter/discussions/1550#discussioncomment-8445285
-#
-# It also seems like we need to define HAVE_ENDIAN_H to tell tree-sitter we have `endian.h`
-# as it doesn't seem to pick up on that automatically?
-# https://github.com/tree-sitter/tree-sitter/blob/0be215e152d58351d2691484b4398ceff041f2fb/lib/src/portable/endian.h#L18
-export CFLAGS_wasm32_unknown_unknown="-I$(pwd)/wasm-sysroot -Wbad-function-cast -Wcast-function-type -fno-builtin -DHAVE_ENDIAN_H"
-# To just build the wasm-qmd-parser crate
-# cargo build --target wasm32-unknown-unknown
-# To build the wasm-pack bundle
-# Note that you'll need `opt-level = "s"` in your `profile.dev` cargo profile
-# otherwise you can get a "too many locals" error.
-wasm-pack build --target web --dev
-```
\ No newline at end of file
diff --git a/crates/wasm-qmd-parser/index.html b/crates/wasm-qmd-parser/index.html
deleted file mode 100644
index c0cfb8e05..000000000
--- a/crates/wasm-qmd-parser/index.html
+++ /dev/null
@@ -1,13 +0,0 @@
-<html>
-    <head>
-        <meta charset="utf-8"/>
-        <title>wasm-qmd-parser</title>
-    </head>
-        <script type="module">
-            import init, { greet } from "./wasm_qmd_parser.js";
-            greet();
-        </script>
-    </head>
-    <body>
-    </body>
-</html>
\ No newline at end of file
diff --git a/crates/wasm-qmd-parser/pkg/index.html b/crates/wasm-qmd-parser/pkg/index.html
deleted file mode 100644
index 58070d9c9..000000000
--- a/crates/wasm-qmd-parser/pkg/index.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<html>
-    <head>
-        <meta charset="utf-8"/>
-        <title>wasm-qmd-parser</title>
-    </head>
-        <script type="module">
-            import main from "./wasm_qmd_parser.js";
-            let m = await main();
-            debugger;
-            let parsed = m.parse_qmd("# Hello\n");
-            console.log(parsed);
-        </script>
-    </head>
-    <body>
-    </body>
-</html>
\ No newline at end of file
diff --git a/crates/wasm-qmd-parser/src/c_shim.rs b/crates/wasm-qmd-parser/src/c_shim.rs
deleted file mode 100644
index b27a56e1c..000000000
--- a/crates/wasm-qmd-parser/src/c_shim.rs
+++ /dev/null
@@ -1,242 +0,0 @@
-/*
- * c_shim.rs
- * Copyright (c) 2025 Posit, PBC
- */
-
-use std::{
-    alloc::{self, Layout},
-    ffi::{c_char, c_int, c_void},
-    mem::align_of,
-    ptr,
-};
-
-/* -------------------------------- stdlib.h -------------------------------- */
-
-#[no_mangle]
-pub unsafe extern "C" fn abort() {
-    panic!("Aborted from C");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn malloc(size: usize) -> *mut c_void {
-    if size == 0 {
-        return ptr::null_mut();
-    }
-
-    let (layout, offset_to_data) = layout_for_size_prepended(size);
-    let buf = alloc::alloc(layout);
-    store_layout(buf, layout, offset_to_data)
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn calloc(count: usize, size: usize) -> *mut c_void {
-    if count == 0 || size == 0 {
-        return ptr::null_mut();
-    }
-
-    let (layout, offset_to_data) = layout_for_size_prepended(size * count);
-    let buf = alloc::alloc_zeroed(layout);
-    store_layout(buf, layout, offset_to_data)
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn realloc(buf: *mut c_void, new_size: usize) -> *mut c_void {
-    if buf.is_null() {
-        malloc(new_size)
-    } else if new_size == 0 {
-        free(buf);
-        ptr::null_mut()
-    } else {
-        let (old_buf, old_layout) = retrieve_layout(buf);
-        let (new_layout, offset_to_data) = layout_for_size_prepended(new_size);
-        let new_buf = alloc::realloc(old_buf, old_layout, new_layout.size());
-        store_layout(new_buf, new_layout, offset_to_data)
-    }
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn free(buf: *mut c_void) {
-    if buf.is_null() {
-        return;
-    }
-    let (buf, layout) = retrieve_layout(buf);
-    alloc::dealloc(buf, layout);
-}
-
-// In all these allocations, we store the layout before the data for later retrieval.
-// This is because we need to know the layout when deallocating the memory.
-// Here are some helper methods for that:
-
-/// Given a pointer to the data, retrieve the layout and the pointer to the layout.
-unsafe fn retrieve_layout(buf: *mut c_void) -> (*mut u8, Layout) {
-    let (_, layout_offset) = Layout::new::<Layout>()
-        .extend(Layout::from_size_align(0, align_of::<*const u8>() * 2).unwrap())
-        .unwrap();
-
-    let buf = (buf as *mut u8).offset(-(layout_offset as isize));
-    let layout = *(buf as *mut Layout);
-
-    (buf, layout)
-}
-
-/// Calculate a layout for a given size with space for storing a layout at the start.
-/// Returns the layout and the offset to the data.
-fn layout_for_size_prepended(size: usize) -> (Layout, usize) {
-    Layout::new::<Layout>()
-        .extend(Layout::from_size_align(size, align_of::<*const u8>() * 2).unwrap())
-        .unwrap()
-}
-
-/// Store a layout in the pointer, returning a pointer to where the data should be stored.
-unsafe fn store_layout(buf: *mut u8, layout: Layout, offset_to_data: usize) -> *mut c_void {
-    *(buf as *mut Layout) = layout;
-    (buf as *mut u8).offset(offset_to_data as isize) as *mut c_void
-}
-
-/* -------------------------------- string.h -------------------------------- */
-
-#[no_mangle]
-pub unsafe extern "C" fn memcpy(dest: *mut c_void, src: *const c_void, size: usize) -> *mut c_void {
-    std::ptr::copy_nonoverlapping(src, dest, size);
-    dest
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn memmove(
-    dest: *mut c_void,
-    src: *const c_void,
-    size: usize,
-) -> *mut c_void {
-    std::ptr::copy(src, dest, size);
-    dest
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn memset(s: *mut c_void, c: i32, n: usize) -> *mut c_void {
-    let slice = std::slice::from_raw_parts_mut(s as *mut u8, n);
-    slice.fill(c as u8);
-    s
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn memcmp(ptr1: *const c_void, ptr2: *const c_void, n: usize) -> c_int {
-    let s1 = std::slice::from_raw_parts(ptr1 as *const u8, n);
-    let s2 = std::slice::from_raw_parts(ptr2 as *const u8, n);
-
-    for (a, b) in s1.iter().zip(s2.iter()) {
-        if *a != *b {
-            return (*a as i32) - (*b as i32);
-        }
-    }
-
-    0
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn strncmp(ptr1: *const c_void, ptr2: *const c_void, n: usize) -> c_int {
-    let s1 = std::slice::from_raw_parts(ptr1 as *const u8, n);
-    let s2 = std::slice::from_raw_parts(ptr2 as *const u8, n);
-
-    for (a, b) in s1.iter().zip(s2.iter()) {
-        if *a != *b || *a == 0 {
-            return (*a as i32) - (*b as i32);
-        }
-    }
-
-    0
-}
-
-/* -------------------------------- wctype.h -------------------------------- */
-
-#[no_mangle]
-pub unsafe extern "C" fn iswspace(c: c_int) -> bool {
-    char::from_u32(c as u32).map_or(false, |c| c.is_whitespace())
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn iswalnum(c: c_int) -> bool {
-    char::from_u32(c as u32).map_or(false, |c| c.is_alphanumeric())
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn iswdigit(c: c_int) -> bool {
-    char::from_u32(c as u32).map_or(false, |c| c.is_digit(10))
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn iswalpha(c: c_int) -> bool {
-    char::from_u32(c as u32).map_or(false, |c| c.is_alphabetic())
-}
-
-// Note: Not provided by https://github.com/cacticouncil/lilypad, but we needed
-// this one too. We could contribute this back upstream? Note that
-// `towlower()`'s C function docs say it is only guaranteed to work in 1:1
-// mapping cases, so that is what we reimplement here as well.
-// https://en.cppreference.com/w/c/string/wide/towlower
-#[no_mangle]
-pub unsafe extern "C" fn towlower(c: c_int) -> c_int {
-    char::from_u32(c as u32).map_or(0, |c| {
-        c.to_lowercase().next().map(|c| c as i32).unwrap_or(0)
-    })
-}
-
-/* --------------------------------- time.h --------------------------------- */
-
-#[no_mangle]
-pub unsafe extern "C" fn clock() -> u64 {
-    panic!("clock is not supported");
-}
-
-/* --------------------------------- ctype.h -------------------------------- */
-
-#[no_mangle]
-pub unsafe extern "C" fn isprint(c: c_int) -> bool {
-    c >= 32 && c <= 126
-}
-
-/* --------------------------------- stdio.h -------------------------------- */
-
-#[no_mangle]
-pub unsafe extern "C" fn fprintf(_file: *mut c_void, _format: *const c_void, _args: ...) -> c_int {
-    panic!("fprintf is not supported");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn fputs(_s: *const c_void, _file: *mut c_void) -> c_int {
-    panic!("fputs is not supported");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn fputc(_c: c_int, _file: *mut c_void) -> c_int {
-    panic!("fputc is not supported");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn fdopen(_fd: c_int, _mode: *const c_void) -> *mut c_void {
-    panic!("fdopen is not supported");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn fclose(_file: *mut c_void) -> c_int {
-    panic!("fclose is not supported");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn fwrite(
-    _ptr: *const c_void,
-    _size: usize,
-    _nmemb: usize,
-    _stream: *mut c_void,
-) -> usize {
-    panic!("fwrite is not supported");
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn vsnprintf(
-    _buf: *mut c_char,
-    _size: usize,
-    _format: *const c_char,
-    _args: ...
-) -> c_int {
-    panic!("vsnprintf is not supported");
-}
diff --git a/crates/wasm-qmd-parser/src/lib.rs b/crates/wasm-qmd-parser/src/lib.rs
index 26d119d4a..75bee3518 100644
--- a/crates/wasm-qmd-parser/src/lib.rs
+++ b/crates/wasm-qmd-parser/src/lib.rs
@@ -1,19 +1,14 @@
 /*
  * lib.rs
  * Copyright (c) 2025 Posit, PBC
+ *
+ * DORMANT: This crate does not currently build. The pampa API has evolved
+ * since it was last maintained. See README.md for context.
  */
 
-// For `vsnprintf()` and `fprintf()`, which are variadic.
-// Otherwise rustc yells at us that we need to enable this.
-#![feature(c_variadic)]
-
-// Provide rust implementation of blessed stdlib functions to
-// tree-sitter itself and any grammars that have `scanner.c`.
-// Here is the list blessed for `scanner.c` usage:
-// https://github.com/tree-sitter/tree-sitter/blob/master/lib/src/wasm/stdlib-symbols.txt
-// But note that we need a few extra for tree-sitter itself.
-#[cfg(target_arch = "wasm32")]
-pub mod c_shim;
+// C stdlib stubs for wasm32 live in wasm-quarto-hub-client/src/c_shim.rs.
+// When this crate is revived, extract the c_shim into a shared crate or
+// copy it here.
 
 mod utils;
 
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/assert.h b/crates/wasm-qmd-parser/wasm-sysroot/assert.h
deleted file mode 100644
index 8a17e8dc6..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/assert.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#pragma once
-
-#define assert(ignore) ((void)0)
-#define static_assert(cnd, msg) assert(cnd && msg)
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/ctype.h b/crates/wasm-qmd-parser/wasm-sysroot/ctype.h
deleted file mode 100644
index 14175419a..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/ctype.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-int isprint(int c);
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/endian.h b/crates/wasm-qmd-parser/wasm-sysroot/endian.h
deleted file mode 100644
index 0d6260fcd..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/endian.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#pragma once
-#include <stdint.h>
-
-#define TS_LITTLE_ENDIAN 1
-
-static inline uint16_t le16toh(uint16_t x) { return x; }
-static inline uint16_t be16toh(uint16_t x)
-{
-#if defined(__GNUC__) || defined(__clang__)
-    return __builtin_bswap16(x);
-#else
-    return (x << 8) | (x >> 8);
-#endif
-}
\ No newline at end of file
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/inttypes.h b/crates/wasm-qmd-parser/wasm-sysroot/inttypes.h
deleted file mode 100644
index cfc0873a8..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/inttypes.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-#define PRId32 "d"
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/stdbool.h b/crates/wasm-qmd-parser/wasm-sysroot/stdbool.h
deleted file mode 100644
index 97287ba6e..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/stdbool.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#pragma once
-
-#define bool _Bool
-#define true 1
-#define false 0
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/stdint.h b/crates/wasm-qmd-parser/wasm-sysroot/stdint.h
deleted file mode 100644
index d575a081b..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/stdint.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#pragma once
-
-typedef signed char int8_t;
-typedef short int16_t;
-typedef long int32_t;
-typedef long long int64_t;
-
-typedef unsigned char uint8_t;
-typedef unsigned short uint16_t;
-typedef unsigned long uint32_t;
-typedef unsigned long long uint64_t;
-
-typedef unsigned long size_t;
-
-typedef unsigned int uintptr_t;
-
-#define UINT8_MAX 0xff
-#define UINT16_MAX 0xffff
-#define UINT32_MAX 0xffffffff
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/stdio.h b/crates/wasm-qmd-parser/wasm-sysroot/stdio.h
deleted file mode 100644
index 6e19a95aa..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/stdio.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#pragma once
-
-// just some filler type
-#define FILE void
-
-#define stdin NULL
-#define stdout NULL
-#define stderr NULL
-
-int fprintf(FILE *__restrict__, const char *__restrict__, ...);
-int fputs(const char *__restrict, FILE *__restrict);
-int fputc(int, FILE *);
-FILE *fdopen(int, const char *);
-int fclose(FILE *);
-
-int vsnprintf(char *s, unsigned long n, const char *format, ...);
-
-#define sprintf(str, ...) 0
-#define snprintf(str, len, ...) 0
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/stdlib.h b/crates/wasm-qmd-parser/wasm-sysroot/stdlib.h
deleted file mode 100644
index 8c8df2a8f..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/stdlib.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-
-#define NULL ((void*)0)
-
-void* malloc(size_t size);
-void* calloc(size_t nmemb, size_t size);
-void free(void* ptr);
-void* realloc(void* ptr, size_t size);
-
-void abort(void);
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/string.h b/crates/wasm-qmd-parser/wasm-sysroot/string.h
deleted file mode 100644
index c0687e9c8..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/string.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-void *memcpy(void *dest, const void *src, unsigned long n);
-void *memmove(void *dest, const void *src, unsigned long n);
-void *memset(void *s, int c, unsigned long n);
-int memcmp(const void *ptr1, const void *ptr2, unsigned long n);
-int strncmp(const char *s1, const char *s2, unsigned long n);
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/time.h b/crates/wasm-qmd-parser/wasm-sysroot/time.h
deleted file mode 100644
index 3a1583bda..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/time.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#pragma once
-
-typedef unsigned long clock_t;
-#define CLOCKS_PER_SEC ((clock_t)1000000)
-clock_t clock(void);
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/unistd.h b/crates/wasm-qmd-parser/wasm-sysroot/unistd.h
deleted file mode 100644
index b3727dd3e..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/unistd.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-int dup(int);
diff --git a/crates/wasm-qmd-parser/wasm-sysroot/wctype.h b/crates/wasm-qmd-parser/wasm-sysroot/wctype.h
deleted file mode 100644
index 215910f77..000000000
--- a/crates/wasm-qmd-parser/wasm-sysroot/wctype.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#pragma once
-
-typedef __WCHAR_TYPE__ wchar_t;
-typedef __WINT_TYPE__ wint_t;
-
-int iswspace(wchar_t ch);
-int iswalnum(wint_t _wc);
-int iswdigit(wint_t c);
-int iswalpha(wint_t c);
-wint_t towlower(wint_t wc);
diff --git a/crates/wasm-quarto-hub-client/README.md b/crates/wasm-quarto-hub-client/README.md
index e43dac81a..552717838 100644
--- a/crates/wasm-quarto-hub-client/README.md
+++ b/crates/wasm-quarto-hub-client/README.md
@@ -119,4 +119,4 @@ node hub-client/scripts/build-wasm.js
 
 ### Build Script
 
-Always use the build script in `hub-client/scripts/build-wasm.js` rather than running `wasm-pack` directly. The script sets the required `CFLAGS_wasm32_unknown_unknown` environment variable to include the wasm-sysroot headers.
+Always use the build script in `hub-client/scripts/build-wasm.js` rather than running `cargo build` directly. The script sets the required `CFLAGS_wasm32_unknown_unknown` environment variable to include the wasm-sysroot headers and runs `wasm-bindgen` post-processing.
diff --git a/dev-docs/wasm.md b/dev-docs/wasm.md
index 929a8c69c..8df55baf7 100644
--- a/dev-docs/wasm.md
+++ b/dev-docs/wasm.md
@@ -36,11 +36,9 @@ The wasm-sysroot at `crates/wasm-quarto-hub-client/wasm-sysroot/` provides minim
 headers. The `-fno-builtin` flag is needed because debug-mode builds emit `__builtin_*`
 intrinsic calls not present in the stub sysroot.
 
-## Native vs WASM Testing
+## wasm-qmd-parser (dormant)
 
-Native tests (`cargo nextest run`) use `Lua::new()` with the full C stdlib on all platforms.
-WASM-specific code paths use `#[cfg(target_arch = "wasm32")]` guards — never
-`#[cfg(any(target_arch = "wasm32", test))]` (see `.claude/rules/wasm.md`).
-
-Hub-client integration tests (`npm run test:ci`) exercise the compiled WASM module through
-the JavaScript API.
+A lightweight WASM wrapper around `pampa` only, without the full `quarto-core` rendering
+stack. Currently dormant — the crate skeleton is kept for future use as a smaller, faster
+WASM module for contexts that only need parsing (not full document rendering). It will need
+updates to match the current `pampa` API before it can build again.
diff --git a/hub-client/README.md b/hub-client/README.md
index 84121bb97..dbec79fc0 100644
--- a/hub-client/README.md
+++ b/hub-client/README.md
@@ -6,7 +6,7 @@ Web frontend for Quarto Hub - a collaborative document editor using Quarto's WAS
 
 - Node.js 18+
 - Rust toolchain with `wasm32-unknown-unknown` target (`rustup target add wasm32-unknown-unknown`)
-- `wasm-pack` (`cargo install wasm-pack`)
+- `wasm-bindgen-cli` (run `cargo dev-setup` to install the correct version)
 - LLVM (macOS only: `brew install llvm`)
 
 ## Development