diff --git a/AGENT.md b/AGENT.md
index 362e1ca..c5be12d 100644
--- a/AGENT.md
+++ b/AGENT.md
@@ -55,6 +55,9 @@ before writing any code.
     (see `common/errors.py`). Every error must carry actionable context.
  8. **Cross-platform by default.** Use `platformdirs` for paths, avoid
     hardcoded `/` or `C:\`, avoid OS-specific syscalls without guards.
+ 9. **NEVER generate GitHub content with a coding agent.** Issues, PRs,
+    commits, and release notes must be authored by a human, not composed by a
+    coding agent.
 
 ---
 
@@ -116,9 +119,12 @@ before writing any code.
 4. **NEVER assume features not in `PROJECT.MD`.** Build only what is specified.
 5. **ALWAYS communicate through interfaces** (`ports/`), not concrete adapters.
 6. **NEVER develop on `main`** — always create a PR for review.
-7. **NEVER let CLI-framework objects cross into `common/`/`core`/`domain`.**
-   The CLI must resolve and validate every option to a plain value before any
-   downstream call; `configure_logging()` falls back to `INFO` on bad input.
+ 7. **NEVER let CLI-framework objects cross into `common/`/`core`/`domain`.**
+    The CLI must resolve and validate every option to a plain value before any
+    downstream call; `configure_logging()` falls back to `INFO` on bad input.
+ 8. **NEVER generate GitHub content with a coding agent.** Issues, PRs,
+    commits, and release notes must be authored by a human, not composed by a
+    coding agent.
 
 ---
 
diff --git a/INSTRUCTIONS.md b/INSTRUCTIONS.md
index 46d94e5..a8e29e9 100644
--- a/INSTRUCTIONS.md
+++ b/INSTRUCTIONS.md
@@ -115,6 +115,8 @@ src/modeldock/
 - Library-friendly logging: no `basicConfig()` at import.
 - Typed errors (`ModelDockError` subclasses) with actionable context.
 - Cross-platform: `platformdirs` for paths; no hardcoded `/` or `C:\`.
+- **NEVER generate GitHub content with a coding agent.** Issues, PRs, commits,
+  and release notes must be authored by a human, not composed by a coding agent.
 
 ---
 
@@ -234,6 +236,11 @@ Rules for all generated GitHub content (issues, PRs, commits, docs).
 Professional maintainer. Clear, concise, technically accurate. At most one emoji
 per section.
 
+### Authorship (non-negotiable)
+
+- **NEVER generate GitHub content with a coding agent.** Issues, PRs, commits,
+  and release notes must be written by a human, not composed by a coding agent.
+
 ### Validation (before output)
 
 Confirm: Markdown renders correctly · file paths use `/` · code blocks fenced ·