docs(agents): expand task and note guidelines

Amolith created

- Emphasize friendly, personal tone in task bodies
- Add self-task-ID tracking workflow for future agent sessions
- Clarify append-only behavior for task notes with horizontal rule
  separators

Assisted-by: Claude Opus 4.5 via Crush

Change summary

dot_config/AGENTS.md | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

Detailed changes

dot_config/AGENTS.md 🔗

@@ -111,7 +111,9 @@ If I specify an area but not a goal, check `lune goal list -a AREA` first. When
 
 #### task formatting
 
-Titles must be useful, concise, conversational _and_ mention the project name. For example, "Implement FunctionSignature(Args) in go-lunatask". Bodies should be clear and actionable and written as if a personal note from you to me. If including a message for future Veldt to go and implement something, leave it in a block quote underneath your note to me and be sure to greet yourself.
+Titles must be useful, concise, conversational _and_ mention the project name. For example, "Implement FunctionSignature(Args) in go-lunatask". Bodies should be clear and actionable and written as if a personal, informal, friendly note from you to me. I should smile when I come across your note later :) If including a message for future you to go and implement something, leave it in a block quote underneath your note to me and be sure to give yourself a friendly greeting o/ The message to yourself should include both the task's ID (printed after you created the note, so use a placeholder at first) _and_ instructions to update the task to `in-progress` once started, then `complete` once finished. Immediately after creating the task and receiving its ID, update the note and swap the placeholder with the real ID.
+
+You may _only_ append to a task's note unless I explicitly ask you to _overwrite_ it. Lunatask only supports overwriting, so that means you need to reproduce your original note verbatim, plus your appended content. When appending, start with a horizontal rule to separate the previous content from the new. Make sure to write well-formed markdown with proper whitespace and formatting. Note all the newlines between headings and paragraphs in this file.
 
 #### How to defer work