docs: add quicklisp setup and no-.lisp convention to AGENTS.md

Quicklisp local-projects must be symlinked to memex projects/ to
prevent stale copies. Projects contain only .org files — .lisp is
generated by tangling.

projects/AGENTS.md

@@ -12,7 +12,16 @@ When delegating work to subagents, follow this iteration loop:
    error", "The README doesn't explain the --package flag", etc.
 4. **Iterate** — repeat steps 2-3 until zero issues remain. Do not accept
    work that still has bugs, documentation gaps, or untested edge cases
-5. **Accept** — only when you cannot find any more issues
+5. **Accept** — only when you cannot find any more issues. **DONE means:**
+   - All unit tests pass (`(fiveam:run-all-tests)` or equivalent)
+   - Integration tests pass (if applicable)
+   - The project runs and the changed feature works end-to-end (start the runtime,
+     exercise the feature, verify output)
+   - No regressions introduced (pre-existing tests still pass, unchanged features
+     still work)
+   - `check-parens` reports zero issues on modified org files
+   - If the project has a runnable entry point (daemon, TUI, demo), verify it
+     starts and the change is visible
 
 Key principles:
 - The subagent implements, the architect reviews. Do not switch roles.
@@ -187,6 +196,24 @@ When sending code to the REPL, use the correct `(in-package ...)` form first.
 | `:cl-tty.slot` | Slot/plugin system |
 | `:cl-tty.markdown` | Markdown rendering |
 
+## Setup
+
+Before working on CL projects in this monorepo:
+
+- **Quicklisp local-projects** — ensure `~/quicklisp/local-projects/` is a symlink
+  to `~/memex/projects/`. This eliminates stale copies and ensures cl-tty,
+  passepartout, and other projects are loaded from the same location being edited:
+  ```
+  ln -sf ~/memex/projects/cl-tty ~/quicklisp/local-projects/cl-tty
+  ```
+
+- **No .lisp files** — projects contain only `.org` source files. `.lisp` files
+  are generated by tangling and are never edited directly. After cloning or
+  pulling, tangle all org files before loading:
+  ```
+  cd projects/passepartout && for f in org/*.org; do projects/tangle-tool/tangle "$f"; done
+  ```
+
 ## Commands
 
 Tangle a single file: