diff --git a/.github/workflows/governance-reusable.yml b/.github/workflows/governance-reusable.yml
index 56842d18..7f30a7f3 100644
--- a/.github/workflows/governance-reusable.yml
+++ b/.github/workflows/governance-reusable.yml
@@ -193,9 +193,37 @@ jobs:
           enforce "Python files" "only allowed for SaltStack" "$PY_FILES"
 
       - name: Check for npm/bun artifacts
+        # standards#67 — npm-avoidant: package-lock.json must never be tracked
+        # estate-wide. Check recursively (not just root) to catch monorepo
+        # sub-packages. See docs/JS-RUNTIME-POLICY.adoc.
         run: |
-          if [ -f "package-lock.json" ] || [ -f "bun.lockb" ] || [ -f ".npmrc" ] || [ -f "yarn.lock" ]; then
-            echo "❌ npm/bun/yarn artifacts detected. Use Deno instead."
+          LOCK_FILES=$(git ls-files 'package-lock.json' '**/package-lock.json' 2>/dev/null || true)
+          BUN_FILES=$(find . -name "bun.lockb" -not -path "./.git/*" 2>/dev/null || true)
+          YARN_FILES=$(find . -name "yarn.lock" -not -path "./.git/*" 2>/dev/null || true)
+          NPMRC_FILES=$(find . -name ".npmrc" -not -path "./.git/*" 2>/dev/null || true)
+          FAILED=""
+          if [ -n "$LOCK_FILES" ]; then
+            echo "❌ Tracked package-lock.json detected (standards#67 — npm-avoidant):"
+            printf '%s\n' "$LOCK_FILES"
+            FAILED=1
+          fi
+          if [ -n "$BUN_FILES" ]; then
+            echo "❌ bun.lockb detected. Use Deno instead."
+            printf '%s\n' "$BUN_FILES"
+            FAILED=1
+          fi
+          if [ -n "$YARN_FILES" ]; then
+            echo "❌ yarn.lock detected. Use Deno instead."
+            printf '%s\n' "$YARN_FILES"
+            FAILED=1
+          fi
+          if [ -n "$NPMRC_FILES" ]; then
+            echo "❌ .npmrc detected. Use Deno deno.json for JS config."
+            printf '%s\n' "$NPMRC_FILES"
+            FAILED=1
+          fi
+          if [ -n "$FAILED" ]; then
+            echo "See hyperpolymath/standards docs/JS-RUNTIME-POLICY.adoc for remediation."
             exit 1
           fi
           echo "✅ No npm/bun violations"
diff --git a/docs/JS-RUNTIME-POLICY.adoc b/docs/JS-RUNTIME-POLICY.adoc
new file mode 100644
index 00000000..318e5c55
--- /dev/null
+++ b/docs/JS-RUNTIME-POLICY.adoc
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: PMPL-1.0-or-later
+= JS Runtime & Package Management Policy
+:revdate: 2026-05-19
+:status: ACTIVE
+:issue-67: hyperpolymath/standards#67
+:issue-68: hyperpolymath/standards#68
+
+This document is the canonical estate-wide policy for JavaScript/TypeScript
+runtimes and package management.  It is referenced by
+`governance-reusable.yml` (enforcement) and the canonical template
+`.gitignore` files (rsr-template-repo, v3-templater).
+
+See also: `scripts/purge-node-modules.sh` (remediation utility).
+
+== Runtime Hierarchy
+
+Tool selection MUST follow this hierarchy:
+
+[cols="1,2,3", options="header"]
+|===
+| Priority | Tool | Rationale
+
+| 1
+| *Deno*
+| Architectural standard.  Secure-by-default, no `node_modules` pollution,
+built-in TypeScript support.  All new JS/TS work starts here.
+
+| 2
+| *Bun*
+| Practical performance fallback.  Drop-in Node compatibility.  Use where
+specific npm-ecosystem libraries are required and Deno cannot reach.
+
+| 3
+| *pnpm*
+| Efficiency fallback.  Prefer over npm when Bun is incompatible.
+
+| 4
+| *npm*
+| Absolute last resort.  Only permitted for platform-specific requirements
+(e.g. VSCode Extension publishing) or legacy audits.  Every npm use must
+carry a `# hypatia:ignore` inline exemption comment.
+|===
+
+== Hard Rules (enforced by governance-reusable.yml)
+
+1. `package-lock.json` MUST NOT be tracked in any repo. ({issue-67})
+   - Add to `.gitignore` via canonical template propagation.
+   - If already tracked: `git rm --cached package-lock.json` and add to
+     `.gitignore`.  Use `purge-node-modules.sh --force` to clean local
+     copies.
+2. `bun.lockb`, `yarn.lock`, `.npmrc` MUST NOT be tracked.
+3. `node_modules/` MUST NOT be tracked (already in canonical `.gitignore`).
+4. `.editorconfig` and `.claude/` MUST NOT be tracked. ({issue-68})
+   - These are local-only (agent scaffolding + editor config).
+   - Add to `.gitignore` via canonical template propagation.
+
+== Canonical .gitignore Entries (template source of truth)
+
+The following entries MUST be present in every repo's `.gitignore` (carried
+from rsr-template-repo and v3-templater via template propagation):
+
+----
+# npm-avoidant (standards#67): estate JS-runtime policy is Deno>Bun>pnpm>npm.
+# npm lockfiles must never be committed estate-wide.
+package-lock.json
+**/package-lock.json
+
+# Agent & editor scaffolding (standards#68) — local-only, never committed
+# estate-wide. Owner decision 2026-05-16: gitignore both rather than commit
+# per-repo agent/editor config.
+.editorconfig
+.claude/
+----
+
+== Remediation
+
+=== Remove a tracked package-lock.json
+
+[source,bash]
+----
+git rm --cached package-lock.json
+echo 'package-lock.json' >> .gitignore
+echo '**/package-lock.json' >> .gitignore
+git commit -m "chore(gitignore): remove tracked package-lock.json (standards#67)"
+----
+
+=== Bulk remediation (estate-wide audit)
+
+Use the propagation script at `scripts/propagate-gitignore-67-68.sh` in this
+repo to identify and prepare per-repo branches.  The script is READ-ONLY by
+default (dry-run); pass `--fix` to stage changes for review.
+
+See also: `npm-avoidant/scripts/purge-node-modules.sh` for removing local
+`node_modules/` and lockfile debris.
+
+== Consumer-repo Audit (2026-05-19 snapshot)
+
+Obtained via `git ls-files` sweep across `/home/hyperpolymath/dev/repos/`:
+
+[cols="2,1", options="header"]
+|===
+| Metric | Count
+
+| Repos with tracked `package-lock.json`
+| 10
+
+| Repos with tracked `.editorconfig`
+| 118
+
+| Repos with tracked `.claude/` files
+| 56
+|===
+
+Detailed list of repos with tracked `package-lock.json` (primary blocker for
+standards#67):
+
+* `ci` (nested: `firefox-lsp/vscode-extension/package-lock.json`)
+* `claude-integrations` (nested: `firefox-lsp/vscode-extension/package-lock.json`)
+* `developer-ecosystem` (nested: `rescript-ecosystem/rescript-tea/package-lock.json`)
+* `git-scripts` (nested: `ui/package-lock.json`)
+* `hyperpolymath-archive` (nested: `flatracoon-netstack/interface/package-lock.json`)
+* `panll` (root)
+* `repos-monorepo` (nested: multiple `boj-cartridges/` sub-packages)
+* `rescript-tea` (root)
+* `typed-wasm` (root)
+* `v3-templater` (root — RESOLVED by PR #68/69, now in `.gitignore`)
+
+NOTE: `.editorconfig` (118 repos) and `.claude/` (56 repos) are already-committed
+historical files.  The gitignore fix prevents new commits; removing existing
+tracked copies is a separate per-repo chore, owner-gated.  See
+`scripts/propagate-gitignore-67-68.sh` for the propagation recipe.
diff --git a/scripts/propagate-gitignore-67-68.sh b/scripts/propagate-gitignore-67-68.sh
new file mode 100755
index 00000000..1a6cf668
--- /dev/null
+++ b/scripts/propagate-gitignore-67-68.sh
@@ -0,0 +1,180 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
+#
+# propagate-gitignore-67-68.sh — Propagate canonical .gitignore additions
+#   for standards#67 (package-lock.json) and standards#68 (.editorconfig /
+#   .claude/) to consumer repos.
+#
+# Mode: READ-ONLY (audit) by default.
+#   Pass --fix to stage changes on a branch in each affected repo.
+#   The script NEVER commits or pushes — that is the human's job.
+#
+# Principles (do not violate):
+#   * Non-destructive: only modifies .gitignore (never removes tracked files).
+#   * Idempotent: entries already present are not duplicated.
+#   * No auto-commit / auto-push (estate guardrail: no unattended mutations).
+#   * Shell-only: no Python, no SaltStack, no Ruby.
+#
+# Usage:
+#   bash standards/scripts/propagate-gitignore-67-68.sh [--fix] [REPO_DIR]
+#
+#   REPO_DIR defaults to ~/dev/repos.
+#
+# With --fix, for each affected repo this script:
+#   1. Creates branch chore/gitignore-67-68 off default branch (if not exists).
+#   2. Appends missing entries to .gitignore.
+#   3. git rm --cached any tracked package-lock.json (staged, not committed).
+#   Leaves commits + push to the human operator.
+#
+# Output: tab-separated audit lines suitable for review.
+
+set -euo pipefail
+
+# ---------------------------------------------------------------------------
+# Configuration
+# ---------------------------------------------------------------------------
+
+ISSUES_REF="Refs hyperpolymath/standards#67\nRefs hyperpolymath/standards#68"
+BRANCH="chore/gitignore-67-68"
+FIX_MODE=false
+REPO_ROOT="${HOME}/dev/repos"
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --fix) FIX_MODE=true; shift ;;
+        *) REPO_ROOT="$1"; shift ;;
+    esac
+done
+
+# Canonical .gitignore block to inject (only entries not already present)
+BLOCK_67='# npm-avoidant (standards#67): estate JS-runtime policy is Deno>Bun>pnpm>npm.
+# npm lockfiles must never be committed estate-wide.
+package-lock.json
+**/package-lock.json'
+
+BLOCK_68='# Agent & editor scaffolding (standards#68) — local-only, never committed
+# estate-wide. Owner decision 2026-05-16: gitignore both rather than commit
+# per-repo agent/editor config.
+.editorconfig
+.claude/'
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+log() { printf '%s\n' "$*" >&2; }
+sep() { log "---"; }
+
+# Returns 0 if pattern is already in .gitignore (or if no .gitignore present)
+already_ignored() {
+    local gi="$1" pattern="$2"
+    [ -f "$gi" ] && grep -qxF "$pattern" "$gi"
+}
+
+append_if_missing() {
+    local gi="$1"; shift
+    local header="$1"; shift
+    local -a entries=("$@")
+    local needs_header=false
+    for entry in "${entries[@]}"; do
+        already_ignored "$gi" "$entry" || needs_header=true
+    done
+    if $needs_header; then
+        printf '\n%s\n' "$header" >> "$gi"
+        for entry in "${entries[@]}"; do
+            if ! already_ignored "$gi" "$entry"; then
+                printf '%s\n' "$entry" >> "$gi"
+            fi
+        done
+    fi
+}
+
+# ---------------------------------------------------------------------------
+# Main audit loop
+# ---------------------------------------------------------------------------
+
+echo "# propagate-gitignore-67-68.sh audit — $(date -u +%Y-%m-%dT%H:%M:%SZ)"
+echo "# mode: $([ "$FIX_MODE" = true ] && echo FIX || echo DRY-RUN)"
+echo "# repo_root: $REPO_ROOT"
+echo "#"
+printf '%-50s\t%s\t%s\t%s\t%s\n' "REPO" "PKG_LOCK_TRACKED" "EDITORCONFIG_TRACKED" "CLAUDE_TRACKED" "GITIGNORE_HAS_67_68"
+
+for repo in "$REPO_ROOT"/*/; do
+    [ -d "$repo/.git" ] || continue
+    name="${repo%/}"
+    name="${name##*/}"
+
+    pkg_lock_tracked=$(git -C "$repo" ls-files 'package-lock.json' '**/package-lock.json' 2>/dev/null | wc -l | tr -d ' ')
+    editorconfig_tracked=$(git -C "$repo" ls-files '.editorconfig' 2>/dev/null | wc -l | tr -d ' ')
+    claude_tracked=$(git -C "$repo" ls-files '.claude/' 2>/dev/null | wc -l | tr -d ' ')
+
+    gi="$repo/.gitignore"
+    gi_has_67=true
+    gi_has_68=true
+    { already_ignored "$gi" "package-lock.json" && already_ignored "$gi" "**/package-lock.json"; } || gi_has_67=false
+    { already_ignored "$gi" ".editorconfig" && already_ignored "$gi" ".claude/"; } || gi_has_68=false
+    gi_status="$([ "$gi_has_67" = true ] && echo y || echo N)/$([ "$gi_has_68" = true ] && echo y || echo N)"
+
+    printf '%-50s\t%s\t%s\t%s\t%s\n' \
+        "$name" "$pkg_lock_tracked" "$editorconfig_tracked" "$claude_tracked" "$gi_status"
+
+    if $FIX_MODE; then
+        needs_work=false
+        $gi_has_67 || needs_work=true
+        $gi_has_68 || needs_work=true
+        [ "$pkg_lock_tracked" -gt 0 ] && needs_work=true
+
+        if $needs_work; then
+            default_branch=$(git -C "$repo" remote show origin 2>/dev/null \
+                | grep 'HEAD branch' | cut -d' ' -f5 || echo main)
+            current_branch=$(git -C "$repo" branch --show-current 2>/dev/null || echo "")
+
+            # Create fix branch if not already on it
+            if [ "$current_branch" != "$BRANCH" ]; then
+                if git -C "$repo" rev-parse --verify "refs/heads/$BRANCH" >/dev/null 2>&1; then
+                    git -C "$repo" checkout "$BRANCH" 2>/dev/null
+                else
+                    git -C "$repo" fetch origin "$default_branch" 2>/dev/null || true
+                    git -C "$repo" checkout -b "$BRANCH" "origin/$default_branch" 2>/dev/null \
+                        || git -C "$repo" checkout "$BRANCH" 2>/dev/null
+                fi
+            fi
+
+            # Ensure .gitignore exists
+            [ -f "$gi" ] || touch "$gi"
+
+            # Append missing blocks
+            if ! $gi_has_67; then
+                append_if_missing "$gi" \
+                    "# npm-avoidant (standards#67): estate JS-runtime policy is Deno>Bun>pnpm>npm." \
+                    "# npm lockfiles must never be committed estate-wide." \
+                    "package-lock.json" \
+                    "**/package-lock.json"
+            fi
+            if ! $gi_has_68; then
+                append_if_missing "$gi" \
+                    "# Agent & editor scaffolding (standards#68) — local-only, never committed" \
+                    "# estate-wide. Owner decision 2026-05-16: gitignore both rather than commit" \
+                    "# per-repo agent/editor config." \
+                    ".editorconfig" \
+                    ".claude/"
+            fi
+
+            # Un-track package-lock.json if tracked
+            if [ "$pkg_lock_tracked" -gt 0 ]; then
+                git -C "$repo" ls-files 'package-lock.json' '**/package-lock.json' 2>/dev/null \
+                | while IFS= read -r f; do
+                    git -C "$repo" rm --cached "$f" 2>/dev/null && log "  [rm-cached] $name: $f"
+                done
+            fi
+
+            log "  [fix applied] $name — branch: $BRANCH"
+        fi
+    fi
+done
+
+echo "#"
+echo "# Audit complete."
+echo "# --fix mode: review per-repo branches and open draft PRs manually."
+echo "# References: $ISSUES_REF"