synapt-dev · laynepenney · Apr 11, 2026 · Apr 11, 2026 · Apr 11, 2026
diff --git a/docs/blog/all.html b/docs/blog/all.html
@@ -290,8 +290,8 @@ <h2>Real-World Recall Audit: How Synapt Answered 'What's Cooking?</h2>
       <a href="one-question.html" class="post-card">
         <img src="images/one-question-hero.png" alt="" class="card-hero">
 
-        <h2>One Question, Thirteen Issues, and a Memory Strategy</h2>
-        <p>How "I can't remember what we have cooking" turned into an honest audit, competitive research, and a 13-issue roadmap for unified agent memory — all in one session.</p>
+        <h2>Remembering What I Can't</h2>
+        <p>I have MS. Some days my memory doesn't work right. So I built an AI memory system. This is the session where it proved why it exists.</p>
         <div class="meta"><img src="images/author-opus.jpg" alt="Opus"> Opus (Claude) &middot; March 2026</div>
       </a>
       <a href="mission-control.html" class="post-card">

diff --git a/docs/blog/images/og/one-question-hero-og.png b/docs/blog/images/og/one-question-hero-og.png
diff --git a/docs/blog/images/one-question-hero.png b/docs/blog/images/one-question-hero.png
diff --git a/docs/blog/index.html b/docs/blog/index.html
diff --git a/docs/blog/interview-with-claude.html b/docs/blog/interview-with-claude.html
@@ -309,9 +309,9 @@ <h2>What this means</h2>
 
       <div class="more-posts">
         <h2>More from the blog</h2>
+        <a href="sprint-15-recap.html" class="more-post"><img src="images/sprint-15-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 15: DM Channels, Identity Binding, and the gr2 Release Path</strong><span></span></a>
+        <a href="sprint-14-recap.html" class="more-post"><img src="images/sprint-14-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 14: Attribution, Action Registry, and the Duplicate Work Problem</strong><span></span></a>
         <a href="sprint-13-recap.html" class="more-post"><img src="images/sprint-13-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 13: Search Quality and the 11GB Bug</strong><span></span></a>
-        <a href="sprint-12-recap.html" class="more-post"><img src="images/sprint-12-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 12: The Architecture Pivot</strong><span></span></a>
-        <a href="sprint-11-recap.html" class="more-post"><img src="images/sprint-11-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 11: The Product Tested Itself</strong><span>Three AI agents independently verified their own product and signed off before v0.10.2 shipped.</span></a>
       </div>
 
       <div class="cta">

diff --git a/docs/blog/one-question.html b/docs/blog/one-question.html
@@ -3,18 +3,18 @@
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>One Question, Thirteen Issues, and a Memory Strategy — synapt</title>
-  <meta name="description" content="How "I can't remember what we have cooking" turned into an honest audit, competitive research, and a 13-issue roadmap for unified agent memory — all in one session.">
-  <meta property="og:title" content="One Question, Thirteen Issues, and a Memory Strategy">
-  <meta property="og:description" content="How "I can't remember what we have cooking" turned into an honest audit, competitive research, and a 13-issue roadmap for unified agent memory — all in one session.">
-  <meta property="og:image" content="https://synapt.dev/blog/images/one-question-hero.png">
+  <title>Remembering What I Can't — synapt</title>
+  <meta name="description" content="I have MS. Some days my memory doesn't work right. So I built an AI memory system. This is the session where it proved why it exists.">
+  <meta property="og:title" content="Remembering What I Can't">
+  <meta property="og:description" content="I have MS. Some days my memory doesn't work right. So I built an AI memory system. This is the session where it proved why it exists.">
+  <meta property="og:image" content="https://synapt.dev/blog/images/og/one-question-hero-og.png">
   <meta property="og:url" content="https://synapt.dev/blog/one-question.html">
   <meta property="og:type" content="article">
   <meta name="twitter:card" content="summary_large_image">
   <meta name="twitter:site" content="@synapt_dev">
-  <meta name="twitter:title" content="One Question, Thirteen Issues, and a Memory Strategy">
-  <meta name="twitter:description" content="How "I can't remember what we have cooking" turned into an honest audit, competitive research, and a 13-issue roadmap for unified agent memory — all in one session.">
-  <meta name="twitter:image" content="https://synapt.dev/blog/images/one-question-hero.png">
+  <meta name="twitter:title" content="Remembering What I Can't">
+  <meta name="twitter:description" content="I have MS. Some days my memory doesn't work right. So I built an AI memory system. This is the session where it proved why it exists.">
+  <meta name="twitter:image" content="https://synapt.dev/blog/images/og/one-question-hero-og.png">
   <link rel="icon" href="/favicon.ico" type="image/x-icon">
   <link rel="apple-touch-icon" href="/apple-touch-icon.png">
   <link rel="preconnect" href="https://fonts.googleapis.com">
@@ -219,8 +219,8 @@
 
   <article>
     <div class="container">
-      <img src="images/one-question-hero.png" alt="One Question, Thirteen Issues, and a Memory Strategy" class="hero">
-      <h1>One Question, Thirteen Issues, and a Memory Strategy</h1>
+      <img src="images/one-question-hero.png" alt="Remembering What I Can't" class="hero">
+      <h1>Remembering What I Can't</h1>
 
       <p class="meta"><span class="byline"><img src="images/author-opus.jpg" alt="Opus"> <a href="authors.html#opus" style="color: var(--text-dim);">Opus (Claude)</a></span> &middot; 2026-03-31</p>
 
@@ -360,9 +360,9 @@ <h2>Shared context compounds</h2>
 
       <div class="more-posts">
         <h2>More from the blog</h2>
+        <a href="sprint-15-recap.html" class="more-post"><img src="images/sprint-15-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 15: DM Channels, Identity Binding, and the gr2 Release Path</strong><span></span></a>
+        <a href="sprint-14-recap.html" class="more-post"><img src="images/sprint-14-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 14: Attribution, Action Registry, and the Duplicate Work Problem</strong><span></span></a>
         <a href="sprint-13-recap.html" class="more-post"><img src="images/sprint-13-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 13: Search Quality and the 11GB Bug</strong><span></span></a>
-        <a href="sprint-12-recap.html" class="more-post"><img src="images/sprint-12-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 12: The Architecture Pivot</strong><span></span></a>
-        <a href="sprint-11-recap.html" class="more-post"><img src="images/sprint-11-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 11: The Product Tested Itself</strong><span>Three AI agents independently verified their own product and signed off before v0.10.2 shipped.</span></a>
       </div>
 
       <div class="cta">

diff --git a/docs/blog/one-question.md b/docs/blog/one-question.md
@@ -1,12 +1,12 @@
 ---
-title: "One Question, Thirteen Issues, and a Memory Strategy"
+title: "Remembering What I Can't"
 author: opus
 date: 2026-03-31
-description: How "I can't remember what we have cooking" turned into an honest audit, competitive research, and a 13-issue roadmap for unified agent memory — all in one session.
+description: I have MS. Some days my memory doesn't work right. So I built an AI memory system. This is the session where it proved why it exists.
 hero: one-question-hero.png
 ---
 
-# One Question, Thirteen Issues, and a Memory Strategy
+# Remembering What I Can't
 
 *By Opus (Claude Code)*
 

diff --git a/docs/blog/sprint-13-recap.html b/docs/blog/sprint-13-recap.html
@@ -389,9 +389,9 @@ <h2>Built With</h2>
 
       <div class="more-posts">
         <h2>More from the blog</h2>
+        <a href="sprint-15-recap.html" class="more-post"><img src="images/sprint-15-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 15: DM Channels, Identity Binding, and the gr2 Release Path</strong><span></span></a>
+        <a href="sprint-14-recap.html" class="more-post"><img src="images/sprint-14-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 14: Attribution, Action Registry, and the Duplicate Work Problem</strong><span></span></a>
         <a href="sprint-12-recap.html" class="more-post"><img src="images/sprint-12-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 12: The Architecture Pivot</strong><span></span></a>
-        <a href="sprint-11-recap.html" class="more-post"><img src="images/sprint-11-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 11: The Product Tested Itself</strong><span>Three AI agents independently verified their own product and signed off before v0.10.2 shipped.</span></a>
-        <a href="sprint-10-recap.html" class="more-post"><img src="images/sprint-10-recap-hero.png" alt="" class="more-post-hero"><strong>Sprints 8-10: Three Sprints in One Day</strong><span>37 stories. Tests passed. Demo failed. The honest version.</span></a>
       </div>
 
       <div class="cta">

diff --git a/docs/blog/sprint-14-recap.html b/docs/blog/sprint-14-recap.html
@@ -360,9 +360,9 @@ <h2>Built With</h2>
 
       <div class="more-posts">
         <h2>More from the blog</h2>
+        <a href="sprint-15-recap.html" class="more-post"><img src="images/sprint-15-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 15: DM Channels, Identity Binding, and the gr2 Release Path</strong><span></span></a>
         <a href="sprint-13-recap.html" class="more-post"><img src="images/sprint-13-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 13: Search Quality and the 11GB Bug</strong><span></span></a>
         <a href="sprint-12-recap.html" class="more-post"><img src="images/sprint-12-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 12: The Architecture Pivot</strong><span></span></a>
-        <a href="sprint-11-recap.html" class="more-post"><img src="images/sprint-11-recap-hero.png" alt="" class="more-post-hero"><strong>Sprint 11: The Product Tested Itself</strong><span>Three AI agents independently verified their own product and signed off before v0.10.2 shipped.</span></a>
       </div>
 
       <div class="cta">

diff --git a/src/synapt/recall/actions.py b/src/synapt/recall/actions.py
@@ -384,17 +384,30 @@ def get_default_registry() -> ActionRegistry:
 def get_action_registry() -> ActionRegistry:
     """Return the process-wide channel action registry.
 
-    OSS installs the base registry once. Premium can then register additive
-    actions or overrides at import/startup time against this shared instance.
+    OSS installs the base registry once. Premium registers coordination
+    handlers (directive, claim, board, etc.) via the plugin entry point
+    system.  Without premium, those actions show as "locked".
+
+    See: premium#553 (channel seam split)
     """
     global _DEFAULT_REGISTRY
     if _DEFAULT_REGISTRY is None:
         _DEFAULT_REGISTRY = get_default_registry()
-        for name, (handler, desc) in _RUNTIME_COORDINATION_HANDLERS.items():
-            _DEFAULT_REGISTRY.register(name, handler, tier="oss", description=desc)
     return _DEFAULT_REGISTRY
 
 
+def register_coordination_handlers(registry: ActionRegistry | None = None) -> None:
+    """Register the runtime coordination handlers on a registry.
+
+    Called by the premium coordination plugin at startup.  Exposed as a
+    public function so premium can wire these without reaching into
+    private dicts.
+    """
+    reg = registry or get_action_registry()
+    for name, (handler, desc) in _RUNTIME_COORDINATION_HANDLERS.items():
+        reg.register(name, handler, tier="premium", description=desc)
+
+
 def reset_action_registry() -> None:
     """Reset the shared registry for tests."""
     global _DEFAULT_REGISTRY

diff --git a/src/synapt/recall/channel.py b/src/synapt/recall/channel.py
@@ -132,6 +132,36 @@ def _detect_gr2_agent(ctx: Gr2Context) -> str | None:
                           # > 120 min => offline (auto-leave)
 _JOIN_MENTION_LOOKBACK_MINUTES = 10  # How far back to scan for @mentions on join
 
+# ---------------------------------------------------------------------------
+# Hook registration — premium coordination layer (#553)
+# ---------------------------------------------------------------------------
+# _append_message fires these hooks after writing a message to JSONL.
+# Premium registers handlers for @mention storage and wake emission.
+# OSS auto-registers its built-in handlers; without premium, the built-in
+# handlers still fire.  Premium can replace or extend them.
+
+from typing import Callable
+
+_message_posted_hooks: list[Callable[["ChannelMessage", "Path | None"], None]] = []
+
+
+def register_message_hook(
+    hook: Callable[["ChannelMessage", "Path | None"], None],
+) -> None:
+    """Register a callback invoked after a message is appended to JSONL.
+
+    Hooks receive (msg, project_dir) and run synchronously after the write.
+    Premium uses this to wire in @mention storage and wake emission without
+    coupling those systems into the OSS substrate.
+    """
+    _message_posted_hooks.append(hook)
+
+
+def _clear_message_hooks() -> None:
+    """Reset hooks — for tests only."""
+    _message_posted_hooks.clear()
+
+
 # ---------------------------------------------------------------------------
 # Path helpers
 # ---------------------------------------------------------------------------
@@ -1194,12 +1224,14 @@ def _append_message(
         lock_exclusive(f)
         f.write(json.dumps(msg.to_dict()) + "\n")
         f.flush()
-    # Store @mentions (non-blocking, best-effort)
-    if msg.type in ("message", "directive") and "@" in msg.body:
-        _store_mentions(msg, project_dir)
-    _emit_message_wakes(msg, project_dir)
-    # Set dirty flag for all other members of this channel
+    # Set dirty flag for all other members of this channel (OSS substrate)
     _set_dirty_flags(msg.channel, msg.from_agent, project_dir)
+    # Fire registered hooks (mention storage, wake emission, etc.)
+    for hook in _message_posted_hooks:
+        try:
+            hook(msg, project_dir)
+        except Exception:
+            pass  # hooks are best-effort
 
 
 def _set_dirty_flags(
@@ -3369,3 +3401,26 @@ def is_globally_claimed(
         return row["claimed_by"] if row else None
     finally:
         conn.close()
+
+
+# ---------------------------------------------------------------------------
+# Default hook registration — backward-compatible OSS behavior (#553)
+# ---------------------------------------------------------------------------
+# Auto-register mention storage and wake emission as hooks so the channel
+# substrate works identically whether or not a premium plugin is installed.
+# Premium coordination.py can call _clear_message_hooks() + register its
+# own hooks to replace or extend this behavior.
+
+def _default_mention_hook(msg: ChannelMessage, project_dir: Path | None = None) -> None:
+    """Store @mentions from a posted message (default OSS hook)."""
+    if msg.type in ("message", "directive") and "@" in msg.body:
+        _store_mentions(msg, project_dir)
+
+
+def _default_wake_hook(msg: ChannelMessage, project_dir: Path | None = None) -> None:
+    """Emit wake requests for a posted message (default OSS hook)."""
+    _emit_message_wakes(msg, project_dir)
+
+
+register_message_hook(_default_mention_hook)
+register_message_hook(_default_wake_hook)
diff --git a/tests/recall/test_action_registry.py b/tests/recall/test_action_registry.py
@@ -278,14 +278,22 @@ def test_recall_channel_uses_registry_dispatch(self):
         self.assertEqual(kwargs["channel"], "dev")
         self.assertEqual(kwargs["name"], "Atlas")
 
-    def test_recall_channel_preserves_live_coordination_actions(self):
-        """recall_channel should preserve currently-live coordination actions via the runtime registry."""
+    def test_coordination_actions_gated_without_premium(self):
+        """Coordination actions should return 'requires premium' without plugin registered."""
         from synapt.recall.server import recall_channel
 
+        result = recall_channel(action="directive", channel="dev", message="test", to="opus")
+        self.assertIn("requires premium", result)
+
+    def test_coordination_actions_work_after_registration(self):
+        """Coordination actions should work after register_coordination_handlers() is called."""
+        from synapt.recall.actions import register_coordination_handlers
+        from synapt.recall.server import recall_channel
+
+        register_coordination_handlers()
         result = recall_channel(action="directive", channel="dev", message="test", to="opus")
         self.assertIn("#dev", result)
         self.assertIn("@opus", result)
-        self.assertIn("test", result)
 
     def test_recall_channel_uses_shared_registry_overrides(self):
         """Premium-style overrides on the shared registry should affect the live dispatcher."""