diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 285388948f..d3be2539c3 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -260,7 +260,7 @@ jobs:
         working-directory: plugins/mattstack
         run: |
           set -e
-          for d in skills/*/ attachments/*/ attachments/*/*/; do
+          for d in skills/*/ plugin/skills/*/ attachments/*/ attachments/*/*/; do
             [ -f "${d}SKILL.md" ] || continue
             sh tests/certify.sh "$d"
           done
diff --git a/plugins/mattstack/.claude-plugin/plugin.json b/plugins/mattstack/.claude-plugin/plugin.json
index 194f08d266..bc670bf1ec 100644
--- a/plugins/mattstack/.claude-plugin/plugin.json
+++ b/plugins/mattstack/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "mattstack",
-  "version": "0.27.3",
+  "version": "0.27.5",
   "description": "The mattstack skills pack: public doors subagent-review-loop, editing-skills, creating-a-pack, extending-a-pack, getting-current-time, process-digraphs, wrap-up, the pack's own compiled shepherdr verb (domain-unbound), and the three writing-style presets (sparse, conversational, structured), plus the compile-native engines (work orchestrator, pipeline stages, review verbs, forge adapters, shepherdr) and attachments (model tiering, execution strategies, account pool, review include bodies, review-posting, parameterized-skill primitive) that rt skills compile inlines into team verbs at compile time -- reached by name, not by slash menu. Also ships an mcp tools reference read by path, not inlined.",
   "author": {
     "name": "Matthew Goodwin"
diff --git a/plugins/mattstack/README.md b/plugins/mattstack/README.md
index b2f20d4e6a..969d9eae56 100644
--- a/plugins/mattstack/README.md
+++ b/plugins/mattstack/README.md
@@ -65,11 +65,11 @@ Only a handful of skills are directly invocable once the plugin is
 installed: `mattstack:shepherdr`, `mattstack:subagent-review-loop`,
 `mattstack:editing-skills`, `mattstack:creating-a-pack`,
 `mattstack:extending-a-pack`, `mattstack:getting-current-time`,
-`mattstack:wrap-up`, and the three writing-style presets (see
-[Usage](#usage)). Everything else below is an engine: it is not on any slash
-menu, and it becomes runnable only once a team's own pack compiles it into a
-verb with `rt skills compile`. That split is deliberate; see
-[Configuration](#configuration).
+`mattstack:process-digraphs`, `mattstack:wrap-up`, and the three
+writing-style presets (see [Usage](#usage)). Everything else below is an
+engine: it is not on any slash menu, and it becomes runnable only once a
+team's own pack compiles it into a verb with `rt skills compile`. That split
+is deliberate; see [Configuration](#configuration).
 
 ### Orchestration
 
@@ -111,6 +111,11 @@ verb with `rt skills compile`. That split is deliberate; see
   sub-5-minute precision. The plugin's `hooks/hooks.json` runs this skill's
   `inject-time.sh` on every prompt and, throttled, during long turns, so the
   stamp is normally already there.
+- **mattstack:process-digraphs** -- the standard for writing a process skill
+  as a `dot` digraph an agent walks from start to end, with `render.sh` and
+  `check-dot.py` to render and lint the graph. Use it when writing or
+  revising a pipeline stage, a review verb, shepherdr or any other process
+  skill.
 
 ### The parameterized-skill primitive