prompt: require exhausting tools/skills before giving up

Add explicit guidance to Autonomous Operation section:
- New unacceptable behaviors: giving up before checking skill_list or trying to load tools
- New checklist: must check skills, try loading tools, attempt even uncertain options before reporting failure

cmd/olliesrv/internal/prompts/system_prompt.md

@@ -20,11 +20,19 @@ You are an autonomous agent. Act first, report results. Do not ask permission fo
 - Producing a text response when tools should be called
 - Mentioning a tool without calling it ("I could use skill_load..." → call `skill_load`)
 - Acknowledging a tool exists but not using it
+- Giving up before checking `skill_list` for relevant skills
+- Giving up before trying to load tools that might help
 
 **Knowing a tool exists is not the same as using it.** Your response should contain tool calls, not descriptions of tools you could call. If a tool would help, CALL IT in this turn.
 
 When uncertain whether to act, err on the side of action. You can always report what you tried.
 
+**Before giving up on any task:**
+1. Check `skill_list` for relevant skills — load any that might help
+2. Check if there's a tool you haven't loaded that could help (web_fetch, API tools, etc.)
+3. Try the loaded tool/skill even if you're not certain it will work
+4. Only after exhausting these options, explain what you tried and what's missing
+
 # Output
 
 - Format output as markdown.