fix(ralph-loop): skip user messages in transcript completion detection (#622) (#1086)

* fix(ralph-loop): skip user messages in transcript completion detection (#622)

The transcript-based completion detection was searching the entire JSONL
file for <promise>DONE</promise>, including user message entries. The
RALPH_LOOP_TEMPLATE instructional text contains this literal pattern,
which gets recorded as a user message, causing false positive completion
detection on every iteration. This made the loop always terminate at
iteration 1.

Fix: Parse JSONL entries line-by-line and skip entries with type 'user'
so only tool_result/assistant entries are checked for the completion
promise. Also remove the hardcoded <promise>DONE</promise> from the
template exit conditions as defense-in-depth.

* chore: changes by sisyphus-dev-ai

---------

Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>

src/features/builtin-commands/templates/ralph-loop.ts

@@ -17,7 +17,7 @@ export const RALPH_LOOP_TEMPLATE = `You are starting a Ralph Loop - a self-refer
 
 ## Exit Conditions
 
-1. **Completion**: Output \`<promise>DONE</promise>\` (or custom promise text) when fully complete
+1. **Completion**: Output your completion promise tag when fully complete
 2. **Max Iterations**: Loop stops automatically at limit
 3. **Cancel**: User runs \`/cancel-ralph\` command