diff --git a/ISSUE_TEMPLATE/bug_report.md b/ISSUE_TEMPLATE/bug_report.md
deleted file mode 100644
index 151862a..0000000
--- a/ISSUE_TEMPLATE/bug_report.md
+++ /dev/null
@@ -1,37 +0,0 @@
----
-name: Bug report
-about: Report something that is not working as expected
-title: ""
-labels: needs triage
-assignees: DerekCorniello
----
-
-## Description
-
-<!-- A clear description of the bug. -->
-
-## Steps to reproduce
-
-1.
-2.
-3.
-
-## Expected behavior
-
-<!-- What you expected to happen. -->
-
-## Actual behavior
-
-<!-- What actually happened. Include error output if any. -->
-
-## Minimal example
-
-```mux
-// Smallest program that reproduces the issue, if applicable.
-```
-
-## Environment
-
-- `mux --version`:
-- OS / architecture:
-- Repo and version (if not mux-compiler):
diff --git a/ISSUE_TEMPLATE/config.yml b/ISSUE_TEMPLATE/config.yml
index 34adc06..7c57e46 100644
--- a/ISSUE_TEMPLATE/config.yml
+++ b/ISSUE_TEMPLATE/config.yml
@@ -1,4 +1,4 @@
-blank_issues_enabled: true
+blank_issues_enabled: false
 contact_links:
   - name: Documentation
     url: https://mux-lang.dev
diff --git a/ISSUE_TEMPLATE/feature_request.md b/ISSUE_TEMPLATE/feature_request.md
deleted file mode 100644
index a58bbb9..0000000
--- a/ISSUE_TEMPLATE/feature_request.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-name: Feature request
-about: Suggest an idea or enhancement
-title: ""
-labels: needs triage
-assignees: DerekCorniello
----
-
-## Problem
-
-<!-- What problem would this solve? What is the use case? -->
-
-## Proposed solution
-
-<!-- What you would like to happen. -->
-
-## Alternatives considered
-
-<!-- Other approaches you thought about, if any. -->
-
-## Additional context
-
-<!-- Anything else: examples, prior art, references. -->
diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
deleted file mode 100644
index 5d9ee79..0000000
--- a/PULL_REQUEST_TEMPLATE.md
+++ /dev/null
@@ -1,19 +0,0 @@
-## Summary
-
-<!-- What does this PR do and why? -->
-
-## Related issue
-
-<!-- e.g. Closes #123 -->
-
-## Changes
-
-<!-- Bullet the key changes. -->
--
-
-## Checklist
-
-- [ ] I read the repo's `README.md` / `AGENTS.md` and followed its conventions
-- [ ] Formatting, lint, and tests pass locally
-- [ ] No special characters (em-dashes, emojis, non-ASCII) in code/comments/commits
-- [ ] Docs updated if behavior or public APIs changed
diff --git a/README.md b/README.md
index 6dc3ef2..2e54895 100644
--- a/README.md
+++ b/README.md
@@ -3,9 +3,17 @@
 Organization-level defaults for the [muxlang](https://github.com/muxlang) org:
 
 - `profile/README.md` - the org profile shown on the [organization page](https://github.com/muxlang).
-- `CONTRIBUTING.md`, `CODE_OF_CONDUCT.md` - shared community-health defaults applied
-  org-wide to any repo that does not define its own.
-- `ISSUE_TEMPLATE/`, `PULL_REQUEST_TEMPLATE.md` - default issue/PR templates.
+- `CONTRIBUTING.md`, `CODE_OF_CONDUCT.md` - shared community-health defaults.
+- `labels/` - canonical label YAML and per-repo overlays.
+- `templates/<repo>/` - canonical issue template sources synced to each repo.
+- `scripts/sync-labels.sh` - apply label YAML to org repos (`gh` CLI required).
+- `scripts/sync-templates.sh` - copy `templates/<repo>/` into a repo checkout.
+- `scripts/retire-labels.sh` - delete retired labels org-wide.
+- `scripts/clear-milestones.sh` - bulk-clear milestones from a repo's issues.
 
-Per-repo files override these defaults. See each repo's own `README.md` and
-`AGENTS.md` for repo-specific guidance.
+Policy and workflow rules:
+[mux-context/docs/repo-governance.md](https://github.com/muxlang/mux-context/blob/main/docs/repo-governance.md).
+
+Per-repo `.github/ISSUE_TEMPLATE/`, `.github/workflows/issue-triage.yml`, and
+`.github/labels.yml` are synced from `templates/` here via `scripts/sync-templates.sh`.
+Do not copy templates or invent labels in individual repos.
diff --git a/labels/labels.yml b/labels/labels.yml
index 6550285..1669f2e 100644
--- a/labels/labels.yml
+++ b/labels/labels.yml
@@ -1,9 +1,7 @@
-# Canonical label set for every muxlang repo. This file is the authoritative
-# list; apply it to each repo manually (e.g. gh label create --force). See
-# docs/repo-governance.md in mux-context for the taxonomy and Linear mapping.
-# ASCII only (org rule). Colors are 6-digit hex, no leading '#'.
+# Canonical label set for every muxlang repo. Apply with scripts/sync-labels.sh.
+# Policy: mux-context/docs/repo-governance.md. ASCII only; 6-digit hex colors.
 
-# --- Kind (complements the issue type) ---
+# --- Kind ---
 - name: documentation
   color: 0075ca
   description: Improvements or additions to documentation
@@ -19,22 +17,11 @@
 - name: testing
   color: 9f267d
   description: Test coverage or test infrastructure
+- name: enhancement
+  color: a2eeef
+  description: Improvement to existing behavior or UX
 
-# --- Priority (maps to Linear priority) ---
-- name: "priority: urgent"
-  color: b60205
-  description: Needs attention now
-- name: "priority: high"
-  color: d93f0b
-  description: Important, schedule soon
-- name: "priority: medium"
-  color: fbca04
-  description: Normal priority
-- name: "priority: low"
-  color: 0e8a16
-  description: Nice to have, no rush
-
-# --- Quality (works, but feels off) ---
+# --- Quality ---
 - name: inconsistency
   color: c5def5
   description: Behaves or looks different across places that should match
diff --git a/labels/mux-context.yml b/labels/mux-context.yml
new file mode 100644
index 0000000..00d6e7f
--- /dev/null
+++ b/labels/mux-context.yml
@@ -0,0 +1,11 @@
+# mux-context overlay on labels.yml
+
+- name: architecture
+  color: 006b75
+  description: Cross-repo architecture or repo map
+- name: adr
+  color: 5319e7
+  description: Architecture decision record
+- name: governance
+  color: fbca04
+  description: Labels, templates, project board, or process
diff --git a/labels/mux-runtime.yml b/labels/mux-runtime.yml
new file mode 100644
index 0000000..fc9832e
--- /dev/null
+++ b/labels/mux-runtime.yml
@@ -0,0 +1,8 @@
+# mux-runtime overlay on labels.yml
+
+- name: stdlib
+  color: "560143"
+  description: Standard library addition or change
+- name: ffi
+  color: 4a7967
+  description: C-ABI or FFI surface change
diff --git a/labels/mux-syntax-highlighting.yml b/labels/mux-syntax-highlighting.yml
new file mode 100644
index 0000000..0db4844
--- /dev/null
+++ b/labels/mux-syntax-highlighting.yml
@@ -0,0 +1,26 @@
+# mux-syntax-highlighting overlay on labels.yml
+
+- name: syntax-spec
+  color: 006b75
+  description: syntax-matrix.json or canonical spec change
+- name: textmate
+  color: 1d76db
+  description: TextMate grammar generation or parity
+- name: editor-support
+  color: 5319e7
+  description: editor-support configs (Sublime, JetBrains, etc.)
+- name: vscode
+  color: 0078d4
+  description: VSCode extension or grammar package
+- name: sublime
+  color: ff9800
+  description: Sublime Text highlighting or config
+- name: jetbrains
+  color: 000000
+  description: JetBrains IDE highlighting or config
+- name: neovim
+  color: 57a143
+  description: Neovim editor-support config
+- name: helix
+  color: 675b2d
+  description: Helix editor-support config
diff --git a/labels/mux-website-api.yml b/labels/mux-website-api.yml
new file mode 100644
index 0000000..a3d7ad9
--- /dev/null
+++ b/labels/mux-website-api.yml
@@ -0,0 +1,11 @@
+# mux-website-api overlay on labels.yml
+
+- name: security
+  color: b60205
+  description: Sandbox, auth, rate limits, or untrusted code execution
+- name: sandbox
+  color: d93f0b
+  description: Compile/run isolation or resource limits
+- name: deployment
+  color: fbca04
+  description: Fly.io deploy, Docker image, or MUX_VERSION pin
diff --git a/labels/mux-website.yml b/labels/mux-website.yml
new file mode 100644
index 0000000..320d94e
--- /dev/null
+++ b/labels/mux-website.yml
@@ -0,0 +1,14 @@
+# mux-website overlay on labels.yml
+
+- name: playground
+  color: 1d76db
+  description: In-browser playground UI or behavior
+- name: docs-site
+  color: 0075ca
+  description: Docusaurus docs site content or layout
+- name: mux-ai
+  color: 5319e7
+  description: Docs AI assistant worker or indexing
+- name: docusaurus
+  color: 0e8a16
+  description: Docusaurus build, config, or tooling
diff --git a/labels/tree-sitter-mux.yml b/labels/tree-sitter-mux.yml
new file mode 100644
index 0000000..f05103a
--- /dev/null
+++ b/labels/tree-sitter-mux.yml
@@ -0,0 +1,20 @@
+# tree-sitter-mux overlay on labels.yml
+
+- name: grammar
+  color: 006b75
+  description: grammar.js or parser behavior
+- name: queries
+  color: 5319e7
+  description: Highlight or query .scm files
+- name: syntax-matrix
+  color: 1d76db
+  description: Vendored syntax-matrix.json sync or drift
+- name: neovim
+  color: 57a143
+  description: Neovim / nvim-treesitter integration
+- name: helix
+  color: 675b2d
+  description: Helix grammar or query integration
+- name: emacs
+  color: 7b1fa2
+  description: Emacs tree-sitter integration
diff --git a/scripts/clear-milestones.sh b/scripts/clear-milestones.sh
new file mode 100755
index 0000000..d06b3e4
--- /dev/null
+++ b/scripts/clear-milestones.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# Bulk-clear milestones from all issues in a repo (issues are not deleted).
+# Usage: ./scripts/clear-milestones.sh <repo>
+set -euo pipefail
+
+REPO="${1:?usage: clear-milestones.sh <repo>}"
+FULL="muxlang/$REPO"
+
+echo "Clearing milestones on $FULL ..."
+gh api "repos/$FULL/issues?state=all&per_page=100" --paginate \
+  --jq '.[] | select(.milestone != null and (.pull_request | not)) | .number' | while read -r num; do
+  id="$(gh issue view "$num" --repo "$FULL" --json id -q .id)"
+  gh api graphql -f query="
+    mutation {
+      updateIssue(input: {id: \"$id\", milestoneId: null}) {
+        issue { number }
+      }
+    }"
+  echo "  cleared #$num"
+done
+
+echo "Closing milestones on $FULL ..."
+gh api "repos/$FULL/milestones?state=all&per_page=100" --paginate --jq '.[].number' | while read -r n; do
+  gh api -X PATCH "repos/$FULL/milestones/$n" -f state=closed
+  echo "  closed milestone #$n"
+done
+
+echo "Done."
diff --git a/scripts/retire-labels.sh b/scripts/retire-labels.sh
new file mode 100755
index 0000000..df18ca8
--- /dev/null
+++ b/scripts/retire-labels.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Delete retired labels from all muxlang repos.
+set -euo pipefail
+
+REPOS=(
+  mux-compiler mux-runtime mux-website-api mux-syntax-highlighting
+  mux-website tree-sitter-mux mux-context .github
+)
+RETIRED=(
+  "priority: urgent" "priority: high" "priority: medium" "priority: low"
+  "needs tested" "bug" "feature"
+)
+
+for repo in "${REPOS[@]}"; do
+  echo "Retiring labels on muxlang/$repo ..."
+  for label in "${RETIRED[@]}"; do
+    gh label delete "$label" --repo "muxlang/$repo" --yes 2>/dev/null || true
+  done
+done
+
+echo "Done."
diff --git a/scripts/sync-labels.sh b/scripts/sync-labels.sh
new file mode 100755
index 0000000..ad7494a
--- /dev/null
+++ b/scripts/sync-labels.sh
@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+# Apply canonical labels from labels/*.yml to muxlang repos.
+# Usage: ./scripts/sync-labels.sh [repo ...]
+# With no args, syncs every repo in ALL_REPOS below.
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+ALL_REPOS=(
+  mux-compiler
+  mux-runtime
+  mux-website-api
+  mux-syntax-highlighting
+  mux-website
+  tree-sitter-mux
+  mux-context
+  .github
+)
+
+apply_yaml() {
+  local repo="$1"
+  local file="$2"
+  local name="" color="" description=""
+
+  while IFS= read -r line; do
+    case "$line" in
+      "- name:"*)
+        name="${line#- name:}"
+        name="${name#\"}"
+        name="${name%\"}"
+        name="${name#"${name%%[![:space:]]*}"}"
+        name="${name%"${name##*[![:space:]]}"}"
+        ;;
+      "  color:"*)
+        color="${line#  color: }"
+        color="${color#\"}"
+        color="${color%\"}"
+        ;;
+      "  description:"*)
+        description="${line#  description: }"
+        if [[ -n "$name" && -n "$color" ]]; then
+          gh label create "$name" \
+            --repo "muxlang/$repo" \
+            --color "$color" \
+            --description "$description" \
+            --force
+          name=""
+          color=""
+          description=""
+        fi
+        ;;
+    esac
+  done < "$file"
+}
+
+sync_repo() {
+  local repo="$1"
+  echo "Syncing muxlang/$repo ..."
+  apply_yaml "$repo" "$ROOT/labels/labels.yml"
+  if [[ -f "$ROOT/labels/$repo.yml" ]]; then
+    apply_yaml "$repo" "$ROOT/labels/$repo.yml"
+  fi
+}
+
+if [[ "$#" -gt 0 ]]; then
+  TARGETS=("$@")
+else
+  TARGETS=("${ALL_REPOS[@]}")
+fi
+
+for repo in "${TARGETS[@]}"; do
+  sync_repo "$repo"
+done
+
+echo "Done."
diff --git a/scripts/sync-templates.sh b/scripts/sync-templates.sh
new file mode 100755
index 0000000..f2b223e
--- /dev/null
+++ b/scripts/sync-templates.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Copy canonical issue templates (and shared bootstrap files) into a repo checkout.
+# Usage: ./scripts/sync-templates.sh <repo> <path-to-repo-checkout>
+#
+# Example:
+#   ./scripts/sync-templates.sh mux-runtime ../mux-runtime
+set -euo pipefail
+
+REPO="${1:?usage: sync-templates.sh <repo> <dest>}"
+DEST="${2:?usage: sync-templates.sh <repo> <dest>}"
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+SRC="$ROOT/templates/$REPO/ISSUE_TEMPLATE"
+
+if [[ ! -d "$SRC" ]]; then
+  echo "error: no templates for repo '$REPO' at $SRC" >&2
+  exit 1
+fi
+
+rm -rf "$DEST/.github/ISSUE_TEMPLATE"
+mkdir -p "$DEST/.github/ISSUE_TEMPLATE" "$DEST/.github/workflows"
+cp -r "$SRC/." "$DEST/.github/ISSUE_TEMPLATE/"
+cp "$ROOT/templates/shared/workflows/issue-triage.yml" "$DEST/.github/workflows/issue-triage.yml"
+cp "$ROOT/templates/shared/labels.yml" "$DEST/.github/labels.yml"
+
+echo "Synced templates, issue-triage workflow, and labels bootstrap to $DEST"
diff --git a/templates/mux-compiler/ISSUE_TEMPLATE/bug_report.md b/templates/mux-compiler/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..79b63b6
--- /dev/null
+++ b/templates/mux-compiler/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,34 @@
+---
+name: Bug report
+about: Report incorrect compiler behavior or a crash
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Description
+
+<!-- What went wrong? -->
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Expected behavior
+
+## Actual behavior
+
+<!-- Include error output if any. -->
+
+## Minimal example
+
+```mux
+
+```
+
+## Environment
+
+- `mux --version`:
+- OS / architecture:
diff --git a/templates/mux-compiler/ISSUE_TEMPLATE/config.yml b/templates/mux-compiler/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..7c57e46
--- /dev/null
+++ b/templates/mux-compiler/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
diff --git a/templates/mux-compiler/ISSUE_TEMPLATE/documentation_fix.md b/templates/mux-compiler/ISSUE_TEMPLATE/documentation_fix.md
new file mode 100644
index 0000000..ad03a42
--- /dev/null
+++ b/templates/mux-compiler/ISSUE_TEMPLATE/documentation_fix.md
@@ -0,0 +1,17 @@
+---
+name: Documentation fix
+about: Report incorrect or missing compiler documentation
+title: ""
+labels: "documentation, needs triage"
+assignees: DerekCorniello
+---
+
+## What is wrong
+
+<!-- Which doc, README, or error message? -->
+
+## Expected content
+
+## Links
+
+<!-- File paths or URLs. -->
diff --git a/templates/mux-compiler/ISSUE_TEMPLATE/feature_request.md b/templates/mux-compiler/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..91ef30d
--- /dev/null
+++ b/templates/mux-compiler/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,17 @@
+---
+name: Feature request
+about: Suggest a new language or compiler capability
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Problem
+
+<!-- What problem would this solve? -->
+
+## Proposed solution
+
+## Alternatives considered
+
+## Additional context
diff --git a/templates/mux-context/ISSUE_TEMPLATE/adr_proposal.md b/templates/mux-context/ISSUE_TEMPLATE/adr_proposal.md
new file mode 100644
index 0000000..fdfa9ac
--- /dev/null
+++ b/templates/mux-context/ISSUE_TEMPLATE/adr_proposal.md
@@ -0,0 +1,15 @@
+---
+name: ADR or design proposal
+about: Propose an architecture decision or cross-repo design change
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Problem
+
+## Proposal
+
+## Alternatives considered
+
+## Affected repos
diff --git a/templates/mux-context/ISSUE_TEMPLATE/config.yml b/templates/mux-context/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..7c57e46
--- /dev/null
+++ b/templates/mux-context/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
diff --git a/templates/mux-context/ISSUE_TEMPLATE/cross_repo_question.md b/templates/mux-context/ISSUE_TEMPLATE/cross_repo_question.md
new file mode 100644
index 0000000..2764e60
--- /dev/null
+++ b/templates/mux-context/ISSUE_TEMPLATE/cross_repo_question.md
@@ -0,0 +1,13 @@
+---
+name: Cross-repo question
+about: Unsure which repo, or the work spans multiple repos
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Question
+
+## Which repos might this touch?
+
+## Additional context
diff --git a/templates/mux-runtime/ISSUE_TEMPLATE/bug_report.md b/templates/mux-runtime/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..5ac59d3
--- /dev/null
+++ b/templates/mux-runtime/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,25 @@
+---
+name: Bug report
+about: Report a runtime crash, incorrect stdlib behavior, or FFI issue
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Description
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Expected behavior
+
+## Actual behavior
+
+## Environment
+
+- `mux-runtime` version (if known):
+- OS / architecture:
+- Minimal repro (Rust or compiled Mux program):
diff --git a/templates/mux-runtime/ISSUE_TEMPLATE/config.yml b/templates/mux-runtime/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..7c57e46
--- /dev/null
+++ b/templates/mux-runtime/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
diff --git a/templates/mux-runtime/ISSUE_TEMPLATE/feature_request.md b/templates/mux-runtime/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..f9526bc
--- /dev/null
+++ b/templates/mux-runtime/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,17 @@
+---
+name: Feature request
+about: Suggest a stdlib or runtime API addition
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Problem
+
+## Proposed API or behavior
+
+## Feature flags
+
+<!-- Does this need a new optional feature (json, csv, net, sql, sync)? -->
+
+## Additional context
diff --git a/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/bug_report.md b/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..3f42578
--- /dev/null
+++ b/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,29 @@
+---
+name: Bug report
+about: Report incorrect syntax highlighting or editor config
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Description
+
+## Affected editor(s)
+
+- [ ] VSCode
+- [ ] Sublime Text
+- [ ] JetBrains
+- [ ] Neovim (editor-support)
+- [ ] Helix (editor-support)
+- [ ] Other:
+
+## Steps to reproduce
+
+1. Code sample:
+2. What is highlighted wrong:
+
+## Expected highlighting
+
+## Environment
+
+- Extension or config version (if known):
diff --git a/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/config.yml b/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..7c57e46
--- /dev/null
+++ b/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
diff --git a/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/syntax_spec_change.md b/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/syntax_spec_change.md
new file mode 100644
index 0000000..f106902
--- /dev/null
+++ b/templates/mux-syntax-highlighting/ISSUE_TEMPLATE/syntax_spec_change.md
@@ -0,0 +1,30 @@
+---
+name: Syntax spec change
+about: Propose a change to syntax-matrix.json (canonical spec)
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Motivation
+
+<!-- Why should the spec change? -->
+
+## Proposed change
+
+<!-- Which tokens, scopes, or rules change? -->
+
+## Downstream sync checklist
+
+<!-- Spec changes require updates in tree-sitter-mux and mux-website too. -->
+
+- [ ] Regenerate TextMate grammar and editor-support in this repo
+- [ ] Verify generated artifacts with `node scripts/check-parity.js` and `node scripts/build-editor-support.js --check`
+- [ ] Update tree-sitter-mux vendored syntax-matrix.json and regenerated `queries/highlights.scm`
+- [ ] Update mux-website Monaco and Shiki definitions
+
+## Example code
+
+```mux
+
+```
diff --git a/templates/mux-website-api/ISSUE_TEMPLATE/bug_report.md b/templates/mux-website-api/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..de382ab
--- /dev/null
+++ b/templates/mux-website-api/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,21 @@
+---
+name: Bug report
+about: Report incorrect compile/run behavior from the playground API
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Description
+
+## Steps to reproduce
+
+1. Mux source (minimal):
+2. Request or endpoint:
+3. Response or error:
+
+## Expected behavior
+
+## Environment
+
+- Deployed API version or MUX_VERSION pin (if known):
diff --git a/templates/mux-website-api/ISSUE_TEMPLATE/config.yml b/templates/mux-website-api/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..edca781
--- /dev/null
+++ b/templates/mux-website-api/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
+  - name: Report a security vulnerability
+    url: https://github.com/muxlang/mux-website-api/security/advisories/new
+    about: Report sandbox or security issues privately via GitHub Security Advisories.
diff --git a/templates/mux-website/ISSUE_TEMPLATE/bug_report.md b/templates/mux-website/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..a5fab35
--- /dev/null
+++ b/templates/mux-website/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,22 @@
+---
+name: Bug report
+about: Report a bug on mux-lang.dev or the playground
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Description
+
+## Steps to reproduce
+
+1. URL or page:
+2. Action taken:
+3. What happened:
+
+## Expected behavior
+
+## Environment
+
+- Browser:
+- OS:
diff --git a/templates/mux-website/ISSUE_TEMPLATE/config.yml b/templates/mux-website/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..7c57e46
--- /dev/null
+++ b/templates/mux-website/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
diff --git a/templates/mux-website/ISSUE_TEMPLATE/documentation_fix.md b/templates/mux-website/ISSUE_TEMPLATE/documentation_fix.md
new file mode 100644
index 0000000..fb36bf7
--- /dev/null
+++ b/templates/mux-website/ISSUE_TEMPLATE/documentation_fix.md
@@ -0,0 +1,13 @@
+---
+name: Documentation fix
+about: Report incorrect or missing content on mux-lang.dev
+title: ""
+labels: "documentation, needs triage"
+assignees: DerekCorniello
+---
+
+## Page URL
+
+## What is wrong
+
+## Expected content
diff --git a/templates/mux-website/ISSUE_TEMPLATE/feature_request.md b/templates/mux-website/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..3d7f090
--- /dev/null
+++ b/templates/mux-website/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,13 @@
+---
+name: Feature request
+about: Suggest a docs site or playground improvement
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Problem
+
+## Proposed solution
+
+## Additional context
diff --git a/templates/shared/labels.yml b/templates/shared/labels.yml
new file mode 100644
index 0000000..bae0a34
--- /dev/null
+++ b/templates/shared/labels.yml
@@ -0,0 +1,7 @@
+# Bootstrap label list for this repo. Issue templates depend on `needs triage`.
+# Full canonical set lives in muxlang/.github/labels/; apply with:
+#   cd muxlang/.github && ./scripts/sync-labels.sh <repo>
+
+- name: needs triage
+  color: ededed
+  description: Not yet reviewed or categorized
diff --git a/templates/shared/workflows/issue-triage.yml b/templates/shared/workflows/issue-triage.yml
new file mode 100644
index 0000000..24ebbca
--- /dev/null
+++ b/templates/shared/workflows/issue-triage.yml
@@ -0,0 +1,67 @@
+name: Issue triage
+
+on:
+  issues:
+    types: [opened]
+
+permissions:
+  issues: write
+
+jobs:
+  ensure-triage-label:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            const labelName = 'needs triage';
+            const ensureLabel = async (name, color, description) => {
+              try {
+                await github.rest.issues.getLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  name,
+                });
+              } catch {
+                try {
+                  await github.rest.issues.createLabel({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    name,
+                    color,
+                    description,
+                  });
+                } catch (createError) {
+                  if (createError.status !== 422) {
+                    throw createError;
+                  }
+                }
+              }
+            };
+            const applyLabelIfMissing = async (name) => {
+              const names = context.payload.issue.labels.map((label) => label.name);
+              if (!names.includes(name)) {
+                await github.rest.issues.addLabels({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: context.payload.issue.number,
+                  labels: [name],
+                });
+              }
+            };
+            await ensureLabel(labelName, 'ededed', 'Not yet reviewed or categorized');
+            await applyLabelIfMissing(labelName);
+            if (!context.payload.issue.assignee) {
+              await github.rest.issues.addAssignees({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.payload.issue.number,
+                assignees: ['DerekCorniello'],
+              });
+            }
+            const title = context.payload.issue.title;
+            const body = context.payload.issue.body || '';
+            if (/^docs?[:/\s]/i.test(title) || /documentation/i.test(title + ' ' + body) || /What is wrong|Expected content|Page URL/i.test(body)) {
+              await ensureLabel('documentation', '0075ca', 'Improvements or additions to documentation');
+              await applyLabelIfMissing('documentation');
+            }
diff --git a/templates/tree-sitter-mux/ISSUE_TEMPLATE/bug_report.md b/templates/tree-sitter-mux/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..a87a678
--- /dev/null
+++ b/templates/tree-sitter-mux/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,28 @@
+---
+name: Bug report
+about: Report a parse error, crash, or incorrect highlight query
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Description
+
+## Affected editor(s)
+
+- [ ] Neovim (nvim-treesitter)
+- [ ] Helix
+- [ ] Emacs
+- [ ] Other:
+
+## Steps to reproduce
+
+1. Code sample:
+2. Command or action:
+3. Actual result:
+
+## Expected result
+
+## Environment
+
+- tree-sitter-cli version:
diff --git a/templates/tree-sitter-mux/ISSUE_TEMPLATE/config.yml b/templates/tree-sitter-mux/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..7c57e46
--- /dev/null
+++ b/templates/tree-sitter-mux/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://mux-lang.dev
+    about: Read the Mux language docs before filing an issue.
diff --git a/templates/tree-sitter-mux/ISSUE_TEMPLATE/grammar_sync.md b/templates/tree-sitter-mux/ISSUE_TEMPLATE/grammar_sync.md
new file mode 100644
index 0000000..0eb007d
--- /dev/null
+++ b/templates/tree-sitter-mux/ISSUE_TEMPLATE/grammar_sync.md
@@ -0,0 +1,20 @@
+---
+name: Grammar sync
+about: Track syncing the vendored syntax-matrix.json from mux-syntax-highlighting
+title: ""
+labels: needs triage
+assignees: DerekCorniello
+---
+
+## Context
+
+<!-- Link to the spec change issue or PR in mux-syntax-highlighting. -->
+
+## Current state
+
+- [ ] syntax-matrix.json updated in this repo
+- [ ] grammar.js regenerated
+- [ ] queries/highlights.scm updated
+- [ ] tree-sitter test passes
+
+## Notes